Barış Güncü - Academia.edu (original) (raw)
Papers by Barış Güncü
Journal of Oral Rehabilitation, 2008
For monitoring of dental implants, practitioners seem to use simultaneously a variety of image-ba... more For monitoring of dental implants, practitioners seem to use simultaneously a variety of image-based and laboratory measurements. This longitudinal study was conducted to analyse the possible relationships between nitric oxide (NO) content of peri-implant sulcus fluid (PISF), marginal bone levels and implant stability in terms of resonance frequency analysis (RFA) at immediately (IL) and conventionally (CL) loaded mandibular molar dental implants from the same individuals. Dental implants were placed in 10 patients who had first molar loss bilaterally in the mandibular area. One site of the patient was determined as IL and the other site was CL. PISF samples, marginal bone level and RFA were taken for all dental implants during a 12-month follow-up period. For both types of loading, there were no significant changes at implant stability (ISQ) and PISF volume during the whole study period. The lowest total nitrite levels were observed at the end of 12 months. Marginal bone gain of 0.22 and 0.09 mm was noticed between 6 and 12 months in IL and CL groups, respectively. During the study period, negative correlation was noted between radiographic bone level and ISQ at both IL and CL sites; however, this correlation reached a significant level only at 6 months in CL implant group (P = 0.015). Although not significant, marginal bone loss seems to have a negative relationship with the implant stability values regardless of the mode of loading. NO metabolism around IL and CL dental implants may not demonstrate a significantly different pattern.
Materials, Sep 14, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
The International Journal of Prosthodontics
To assess the marginal and internal fit of monolithic zirconia fixed dental prostheses (FDPs) com... more To assess the marginal and internal fit of monolithic zirconia fixed dental prostheses (FDPs) comparing two different intraoral scanners and assessment methods. Materials and Methods: A maxillary typodont with three prepared teeth allowed the fabrication of five-unit, high-translucency monolithic zirconia FDPs. The typodont was scanned with intraoral scanners Cerec Omnicam and 3Shape Trios 3. A total of 30 FDPs were milled from presintered hightranslucency zirconia blocks. Dual-scan and silicone replica assessments were used to determine marginal and internal gaps. Results: Statistical significance was observed for marginal gap (Trios:
The International Journal of Prosthodontics
To investigate the clinical results of single-tooth ceramic crowns in the posterior region produc... more To investigate the clinical results of single-tooth ceramic crowns in the posterior region produced from three different monolithic materials. Materials and Methods: A total of 36 posterior single-tooth crowns were fabricated from lithium This peer-reviewed, accepted manuscript will undergo final editing and production prior to publication in IJP.
Journal of Dental Sciences
Background/purpose: Zirconia has recently become a popular material for fixed restorations. The p... more Background/purpose: Zirconia has recently become a popular material for fixed restorations. The purpose of this study was to use a digital workflow to fabricate monolithic zirconia fixed dental prostheses (FDPs) and assess the connection between variable connector sizes compared to their clinical performance. Materials and methods: Clinicians evaluated monolithic zirconia FDPs in 58 patients. After definitive impressions were made, stone casts were obtained. The stone casts were scanned to a standard triangle language (STL) file. A digital wax up was fabricated, and corresponding provisional restorations were milled. Final FDPs were fabricated from a high-translucent zirconia material. During digital fabrication, the connector area of each FDP was recorded while meticulous attention was paid to ensure that the connector cross-sectional area was !9 mm 2 for the 3-unit restorations (pontic to retainer) and !12 mm 2 for the 4-unit restorations (pontic to pontic). Biological an technical outcomes of the FDPs were performed at 1 week, 6 months and then annually for 6 consecutive years. Results: A total of 23 men and 35 women received a total of 63 full-contour zirconia FDPs in the posterior regions and were observed for a time period ranging between 50 and 70 months. No decementation occurred and no caries were detected during the observation period, however signs of gingivitis were detected in 4 patients. The dimension of the connector areas was 12 mm 2 in the two broken 4-unit FDPs. Conclusion: The results of this study suggest that the use of digital scanning and milling to fabricate monolithic zirconia FDPs of posterior regions may be an acceptable alternative restorative approach to traditional metal-ceramic restorations.
Cumhuriyet Dental Journal, 2015
Objectives: The aim of this study was to evaluate the one-year clinical follow-up the two implant... more Objectives: The aim of this study was to evaluate the one-year clinical follow-up the two implant retained mandibular overdentures with locator attachments and conventional maxillary complete dentures.Materials and Methods: A total of 18 implants were placed in mandibular anterior region. 9 implant retained mandibular overdentures with locator attachment and conventional maxillary complete denture were fabricated after healing period. Follow up visits were performed every in 3 months during one-year follow-up. Implant survival rate, mechanic complications, periimplant tissue (marginal bone loss, presence of calculus) and patient satisfaction were evaluated.Results: Patient satisfaction was significantly higher in two implant retained overdenture with locator attachment in comparison with their earlier conventional complete denture. Implant survival rate was 100%. However no technical complication was detached in seven patients, patrix deformation was observed as a technical complica...
European oral research, May 5, 2022
Purpose The aim of this study was to determine descriptive characteristics of dental students, to... more Purpose The aim of this study was to determine descriptive characteristics of dental students, to investigate their professional expectations, career decision criteria, and related factors; to examine how (if any) seniority in school affects these. Subjects and Methods During the period of 2018-2019, all 1-5 grade students (n = 754) of Hacettepe University Dental School were invited to participate and those who accepted had filled under observation a standard questionnaire form of 35 questions (83.4%). In the analysis of the data, descriptive statistics, chi-square, Student's t-test and ANOVA and Odds ratio methods were used. Results In this cross-sectional study, 66% of the group were female, age range was 18-30 (mean±SD= 21.2 ± 1.7). The most common reasons for choosing dentistry were "financial benefits", "job security" and "professional status". "Undertake specialist training" (80.2%) was the most common short-term expectation after graduation; two most common long-term expectations were "having a private clinic" (57.9%) and "completing specialization training" (56.0%). The most important factors affecting the post-graduation working plans were work-life balance and economic stability. Conclusion It is recommended to provide adequate counseling and guidance to students about potential career paths to maximize a balanced and widely accessible oral health service delivery across the country with more motivated dentists. Qualitative research may improve our understanding of how dental education can be improved to fulfill students' expectations from school, and to motivate dental students towards general practitioning in the future.
International Journal of Prosthodontics, 2015
The purpose of this retrospective study was to evaluate the 5-year clinical performance and failu... more The purpose of this retrospective study was to evaluate the 5-year clinical performance and failure rate of single-or multiple-unit zirconia-based crowns. Materials and Methods: A total of 148 patients (39 men and 109 women, mean age: 46.9 ± 10.6 years) treated in university and private practices with 618 single-or multiple-unit zirconia-based (Lava) crowns made on natural teeth from January 2007 to December 2008 were included. Two hundred fifty-nine anterior and 359 posterior crowns were examined. A core and/or veneer fracture that required replacement of the restoration was considered to be a failure. The cumulative survival rate (CSR) was described with Kaplan-Meier survival functions. The crowns replaced for other reasons were deemed lost to follow-up, and esthetic, functional, and biologic complications were rated. Results: At the 5-year follow-up, no zirconia core fractures were observed. Twelve veneer fractures that required crown replacement were detected. The CSR was 98.1%. There was a statistically significant difference between survival of the anterior and posterior restorations (P < .001). In total, 116 crowns experienced biologic and technical complications. The most common complications were smooth veneer fracture (4, 0.6%), loss of retention (7, 1%), staining because of smoking (24, 4%), and gingival recession (48, 8%). Conclusions: According to the 5-year CSR (98.1%) observed in this study, zirconia-based single or multiple crowns may be considered an acceptable treatment modality for the replacement of anterior and posterior teeth. Results from the current study should be supported by additional randomized clinical trials.
7tepe klinik, 2019
Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğ... more Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğindeki gelişmeler de hızlanmıştır. Yeni restoratif meteryaller ile tek seansta üretimi mümkün kılan bilgisayar destekli tasarım ve üretim (CAD/CAM) teknolojisi, bu beklentileri karşılar hale gelmiştir. Dental porselenlerin temelini oluşturan feldspatik porselen ve lösitle güçlendirilmiş cam seramiklerin düşük bükülme dayanımı gibi dezavantajlarını elimine etmek amacıyla, seramik yapıya güçlendirici maddeler eklenmiştir. Bu durum tabaklama gerektirmeyen monolitik materyalleri geliştirmiştir. Böylece kor materyali gereksinimi ortadan kalkmıştır ve dolayısı ile porselen-kor bağlantısındaki sorunlar elimine edilmiştir. Sonuçta yapısal bütünlüğü daha güçlü, CAD/CAM üretimine uygun hazır disk ve bloklar kullanıma sunulmuştur. Bu disk ve bloklar yapıya; lityum disilikat, zirkonyum oksit, aluminyum oksit, lösit ve rezin kompozit gibi maddeler eklenerek çeşitli üretim teknikleriyle üretilmektedirler. Bu materyallerin hangi klinik durumlarda tercih edileceği ise; materyalin mekanik, optik ve biyouyumluluk özelliğine göre belirlenmektedir. Bu derlemede ise son zamanlarda popüler hale gelen yüksek dayanımlı cam seramiklerin güncel literatür desteği ile materyal özellikleri incelenmiştir. Anahtar kelimeler: Yüksek dayanımlı cam seramikler, lityum disilikat cam seramik, zirkonyumla güçlendirilmiş cam seramik, biyomateryal özellikler. SUMMARY Day by day, developments in digital dentistry are accelerated with the increase of patient's improved faster and aesthetic treatment expectations. Computer aided design and manufacturing (CAD / CAM) technology makes it possible to manufacture restorations in a single appointment with new restorative materials that meets these expectations of the patients. In order to eliminate the disadvantages of feldspatic porcelain and leucite-reinforced glass ceramics, which is the basis of dental porcelain with low flexural strength, has been added to the ceramic structure for reinforcement of the materials. This has improved monolithic materials that do not require veneering. Thus, the core material has not been needed, and therefore problems with porcelain-core connection have been eliminated. Consequently, prefabricated discs and blocks with stronger structural integrity are available for CAD/CAM. These discs and blocks are made with various production techniques by adding materials such as lithium disilicate, zirconium oxide, aluminum oxide, leucite and resin composite. The clinical situation in which these materials are to be used is determined by the mechanical, optical and biocompatibility of the material. In this review, recent literature support and material properties of high strength glass ceramics, which became popular recently, were examined.
Turkiye Klinikleri Journal of Medical Sciences, 2020
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi, 2016
Kompozit rezinler uzun yıllardır hem restoratif dolgu maddesi olarak hem de adeziv restorasyonlar... more Kompozit rezinler uzun yıllardır hem restoratif dolgu maddesi olarak hem de adeziv restorasyonlarda diş eksikliklerinin giderilmesinde kullanılmaktadır. Artan okluzal yükler karşısında kompozit rezinlerin fiber ile güçlendirilmesi materyalin dayanıklılığını artırmak amacı ile kullanılan bir yöntemdir. Bu invitro çalışmanın amacı fiber ile güçlendirmenin kompozit rezinlerde eğilme direncine olan etkisinin araştırılmasıdır. Gereç ve Yöntem: Farklı fiber dağılımına ve rezin oranına sahip kompozit bloklar (GR 1, GR 2, GR 3,) ve bir deneysel kompozit (GR 4) laboratuvar ortamında hazırlandı. Fiber ile güçlendirilmiş bloklar ve piyasada yer alan hazır kompozit blok (GR 5) kesme cihazı ile ebadı 2x2x25 mm olacak şekilde 5 gruba (n:18) ayrıldı. Örneklere 24 saat 37 C de distile suda bekletildikten sonra Universal test cihazında 1mm/dk hızla eğilme testi uygulandı. Sonuçlar tek yönlü varyans analizi (ANOVA) ile değerlendirildi. Bulgular: Tüm gruplar arasında istatiksel olarak anlamlı farklılık gözlenmiştir (p<0.001). Ortalama eğilme direnci değerleri ve standart sapmaları GR 1, GR 2, GR 3, GR 4 ve GR 5'de sırasıyla 130±6, 125±5.1, 136±6.8, 115±4 ve 85±2.9 bulundu. Gr 3 en yüksek değeri gösterirken, Gr 5 en düşük değeri göstermiştir (p<0.001). Sonuç: Bu invitro çalışmada kompozit rezinlerin cam fiber ile güçlendirilmesi eğilme direncini artırmaktadır.
Clinical Oral Investigations, 2016
This study aims to evaluate the 4-year clinical performance of tooth versus implant-supported sin... more This study aims to evaluate the 4-year clinical performance of tooth versus implant-supported single-unit zirconia crowns (LAVA™) placed on posterior region. Twenty-four patients (10 men and 14 women) who had received 48 single crowns (24 implant-supported and 24 tooth-supported) from January 2007 to December 2009, were included. California Dental Association (CDA) quality assessment system, plaque and gingival index scores were used to evaluate the performance of the crowns at baseline and at all follow-up examinations. During the follow-up period, no fracture of zirconia coping has occurred. Major complication was chipping in three patients that required a new crown fabrication. Except for the failure ones, all crowns in both groups were rated as satisfactory at the follow-up examinations based on the CDA quality assessment criteria. There were no statistically significant differences between tooth and implant-supported crowns in terms of periodontal parameters. The present 4-year follow-up clinical study demonstrates that single-unit tooth- and implant-supported zirconia crowns have similar prosthetic and periodontal outcomes. Single-unit implant or tooth-supported zirconia crowns may be considered acceptable treatment modalities for restoration of either missing or compromised posterior teeth.
Journal of Periodontology, 2008
Background: Further clarification of the early and late response of peri-implant tissues to surgi... more Background: Further clarification of the early and late response of peri-implant tissues to surgical insertion and loading of dental implants and the potential associations among the various implantrelated measures are likely to improve the evaluation/monitoring of implant sites. Thus, analyses were made of the volume and nitric oxide (NO) profile of peri-implant sulcus fluid (PISF), implant stability, and marginal bone level in relation to different prosthetic designs. Methods: Seven totally edentulous subjects and 11 partially edentulous subjects were included. Resonance frequency analysis (RFA), marginal bone level measurements, PISF volume, and spectrophotometrically determined nitrite levels were analyzed comparatively at conventionally loaded (CL) implant sites and at implants with removable prostheses (RP; N = 14) and fixed prostheses (FP; N = 11) for a period of 12 months. Results: At implant sites with RP, PISF volume decreased gradually and its lowest level occurred at the end of the experimental period. The PISF nitrite content increased until 6 months and was followed by a significant decrease at 12 months. Compared to baseline, RFA values exhibited a significant decrease at 1 and 3 months. Marginal bone level was significantly lower at all follow-up visits compared to baseline. More volumetric fluctuations of PISF was noted at implant sites with FP. The PISF nitrite content had decreased, compared to baseline, at 6, 9, and 12 months. A general stability was observed for RFA. The marginal bone loss observed at 6 months was followed by a gain at 12 months. An inverse relationship was noted between RFA values and marginal bone levels. Conclusion: The prosthetic design particularly seems to affect the NO metabolism around CL implants, whereas it does not seem to have any impact on the stability of dental implants.
Clinical Implant Dentistry and Related Research, 2008
Background: As well as gingival crevicular fluid (GCF), peri-implant sulcus fluid (PISF) may have... more Background: As well as gingival crevicular fluid (GCF), peri-implant sulcus fluid (PISF) may have a potential diagnostic value for the early identification of metabolic and destructive processes.
Background Short-time sintering may offer advantages including saving time and energy but there i... more Background Short-time sintering may offer advantages including saving time and energy but there is limited evidence on the effect that altering sintering time has on the accuracy of monolithic zirconia crowns. The purpose of this in vitro study was to investigate the effect of shortened sintering time on the marginal and internal t of 3Y-TZP (three mol% yttria-stabilized tetragonal zirconia polycrystal) and 4Y-TZP (four mol% yttriastabilized tetragonal zirconia polycrystal) monolithic crowns. Methods Sixty monolithic zirconia crowns were fabricated for the maxillary rst molar tooth on the prefabricated implant abutment. Groups were created according to the material composition: 3Y-TZP Generation 1 (alumina wt; ≤0.5%, < 15% cubic phase), 3Y-TZP Generation 2 (alumina wt; ≤0.05%, < 15% cubic phase) and 4Y-TZP (alumina wt; ≤0.05%, > 25% cubic phase). Two different sintering protocols were performed: same nal sintering temperature (1500°C) and various rates of heating (10°C/min and 40°C/min), cooling down speed (-10°C/min and − 40°C/min), holding time (45 and 120 minutes), and total sintering time (approximately 2 and 7 hours, respectively). The marginal and internal t of the crowns were determined using the silicone replica technique. Comparisons between groups and sintering times were analyzed using two-way ANOVA. Pairwise multiple comparisons were performed using the t-test (p < 0.05). Results The mean marginal gap values of 4Y-TZP zirconia revealed statistically signi cant increase for the speed sintering protocol (p < 0.0001), while no difference was observed between the sintering protocols for the mean marginal gap values of 3Y-TZP groups. Conclusions Although all groups showed clinically acceptable gap values (<120 µm), altering the sintering time had an effect on the marginal t of the crowns manufactured from 4Y-TZP zirconia. Shortening the sintering time may lead to differences within clinically acceptable limits. The manufacturer's recommendations according to material composition should be implemented with care.
Clinical Oral Implants Research, 2008
The aim of this prospective clinical study was to evaluate the clinical outcomes of dental implan... more The aim of this prospective clinical study was to evaluate the clinical outcomes of dental implants placed in the mandibular molar sites and immediately functionally restored compared with conventionally loaded controls in an in-patient study. Material and methods: Twenty-four dental implants were placed in 12 patients who had first molar loss bilaterally in the mandibular area. One site of the patient was determined as immediately loaded (IL) and the other side was conventionally loaded (CL). Resonance frequency analyses for implant stability measurements, radiographic examinations for marginal bone levels and peri-implant evaluations were performed during the clinical follow-up appointments within 12 months. Results: During the 12-month follow-up period, only one implant was lost in the IL group. The mean implant stability quotient values were 74.18 AE 5.72 and 75.18 AE 3.51 for Groups IL and CL at surgery, respectively, and the corresponding values were 75.36 AE 5.88 and 75.64 AE 4.84 at 1-year recall, respectively. The difference was not statistically significant between the two groups during the 12-month study period (P40.05). When peri-implant parameters were evaluated, excellent peri-implant health was demonstrated during the 1-year observation period and all implants showed less than 1 mm of marginal bone resorption during the first year. Conclusions: In the present study, immediate functionally loading did not negatively affect implant stability, marginal bone levels and peri-implant health when compared with conventional loading of single-tooth implants.
Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğ... more Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğindeki gelişmeler de hızlanmıştır. Yeni restoratif meteryaller ile tek seansta üretimi mümkün kılan bilgisayar destekli tasarım ve üretim (CAD/CAM) teknolojisi, bu beklentileri karşılar hale gelmiştir. Dental porselenlerin temelini oluşturan feldspatik porselen ve lösitle güçlendirilmiş cam seramiklerin düşük bükülme dayanımı gibi dezavantajlarını elimine etmek amacıyla, seramik yapıya güçlendirici maddeler eklenmiştir. Bu durum tabaklama gerektirmeyen monolitik materyalleri geliştirmiştir. Böylece kor materyali gereksinimi ortadan kalkmıştır ve dolayısı ile porselen-kor bağlantısındaki sorunlar elimine edilmiştir. Sonuçta yapısal bütünlüğü daha güçlü, CAD/CAM üretimine uygun hazır disk ve bloklar kullanıma sunulmuştur. Bu disk ve bloklar yapıya; lityum disilikat, zirkonyum oksit, aluminyum oksit, lösit ve rezin kompozit gibi maddeler eklenerek çeşitli üretim teknikleriyle üretilmektedirler. Bu materyallerin hangi klinik durumlarda tercih edileceği ise; materyalin mekanik, optik ve biyouyumluluk özelliğine göre belirlenmektedir. Bu derlemede ise son zamanlarda popüler hale gelen yüksek dayanımlı cam seramiklerin güncel literatür desteği ile materyal özellikleri incelenmiştir. Anahtar kelimeler: Yüksek dayanımlı cam seramikler, lityum disilikat cam seramik, zirkonyumla güçlendirilmiş cam seramik, biyomateryal özellikler. SUMMARY Day by day, developments in digital dentistry are accelerated with the increase of patient's improved faster and aesthetic treatment expectations. Computer aided design and manufacturing (CAD / CAM) technology makes it possible to manufacture restorations in a single appointment with new restorative materials that meets these expectations of the patients. In order to eliminate the disadvantages of feldspatic porcelain and leucite-reinforced glass ceramics, which is the basis of dental porcelain with low flexural strength, has been added to the ceramic structure for reinforcement of the materials. This has improved monolithic materials that do not require veneering. Thus, the core material has not been needed, and therefore problems with porcelain-core connection have been eliminated. Consequently, prefabricated discs and blocks with stronger structural integrity are available for CAD/CAM. These discs and blocks are made with various production techniques by adding materials such as lithium disilicate, zirconium oxide, aluminum oxide, leucite and resin composite. The clinical situation in which these materials are to be used is determined by the mechanical, optical and biocompatibility of the material. In this review, recent literature support and material properties of high strength glass ceramics, which became popular recently, were examined.
Journal of Oral Rehabilitation, 2008
For monitoring of dental implants, practitioners seem to use simultaneously a variety of image-ba... more For monitoring of dental implants, practitioners seem to use simultaneously a variety of image-based and laboratory measurements. This longitudinal study was conducted to analyse the possible relationships between nitric oxide (NO) content of peri-implant sulcus fluid (PISF), marginal bone levels and implant stability in terms of resonance frequency analysis (RFA) at immediately (IL) and conventionally (CL) loaded mandibular molar dental implants from the same individuals. Dental implants were placed in 10 patients who had first molar loss bilaterally in the mandibular area. One site of the patient was determined as IL and the other site was CL. PISF samples, marginal bone level and RFA were taken for all dental implants during a 12-month follow-up period. For both types of loading, there were no significant changes at implant stability (ISQ) and PISF volume during the whole study period. The lowest total nitrite levels were observed at the end of 12 months. Marginal bone gain of 0.22 and 0.09 mm was noticed between 6 and 12 months in IL and CL groups, respectively. During the study period, negative correlation was noted between radiographic bone level and ISQ at both IL and CL sites; however, this correlation reached a significant level only at 6 months in CL implant group (P = 0.015). Although not significant, marginal bone loss seems to have a negative relationship with the implant stability values regardless of the mode of loading. NO metabolism around IL and CL dental implants may not demonstrate a significantly different pattern.
Materials, Sep 14, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
The International Journal of Prosthodontics
To assess the marginal and internal fit of monolithic zirconia fixed dental prostheses (FDPs) com... more To assess the marginal and internal fit of monolithic zirconia fixed dental prostheses (FDPs) comparing two different intraoral scanners and assessment methods. Materials and Methods: A maxillary typodont with three prepared teeth allowed the fabrication of five-unit, high-translucency monolithic zirconia FDPs. The typodont was scanned with intraoral scanners Cerec Omnicam and 3Shape Trios 3. A total of 30 FDPs were milled from presintered hightranslucency zirconia blocks. Dual-scan and silicone replica assessments were used to determine marginal and internal gaps. Results: Statistical significance was observed for marginal gap (Trios:
The International Journal of Prosthodontics
To investigate the clinical results of single-tooth ceramic crowns in the posterior region produc... more To investigate the clinical results of single-tooth ceramic crowns in the posterior region produced from three different monolithic materials. Materials and Methods: A total of 36 posterior single-tooth crowns were fabricated from lithium This peer-reviewed, accepted manuscript will undergo final editing and production prior to publication in IJP.
Journal of Dental Sciences
Background/purpose: Zirconia has recently become a popular material for fixed restorations. The p... more Background/purpose: Zirconia has recently become a popular material for fixed restorations. The purpose of this study was to use a digital workflow to fabricate monolithic zirconia fixed dental prostheses (FDPs) and assess the connection between variable connector sizes compared to their clinical performance. Materials and methods: Clinicians evaluated monolithic zirconia FDPs in 58 patients. After definitive impressions were made, stone casts were obtained. The stone casts were scanned to a standard triangle language (STL) file. A digital wax up was fabricated, and corresponding provisional restorations were milled. Final FDPs were fabricated from a high-translucent zirconia material. During digital fabrication, the connector area of each FDP was recorded while meticulous attention was paid to ensure that the connector cross-sectional area was !9 mm 2 for the 3-unit restorations (pontic to retainer) and !12 mm 2 for the 4-unit restorations (pontic to pontic). Biological an technical outcomes of the FDPs were performed at 1 week, 6 months and then annually for 6 consecutive years. Results: A total of 23 men and 35 women received a total of 63 full-contour zirconia FDPs in the posterior regions and were observed for a time period ranging between 50 and 70 months. No decementation occurred and no caries were detected during the observation period, however signs of gingivitis were detected in 4 patients. The dimension of the connector areas was 12 mm 2 in the two broken 4-unit FDPs. Conclusion: The results of this study suggest that the use of digital scanning and milling to fabricate monolithic zirconia FDPs of posterior regions may be an acceptable alternative restorative approach to traditional metal-ceramic restorations.
Cumhuriyet Dental Journal, 2015
Objectives: The aim of this study was to evaluate the one-year clinical follow-up the two implant... more Objectives: The aim of this study was to evaluate the one-year clinical follow-up the two implant retained mandibular overdentures with locator attachments and conventional maxillary complete dentures.Materials and Methods: A total of 18 implants were placed in mandibular anterior region. 9 implant retained mandibular overdentures with locator attachment and conventional maxillary complete denture were fabricated after healing period. Follow up visits were performed every in 3 months during one-year follow-up. Implant survival rate, mechanic complications, periimplant tissue (marginal bone loss, presence of calculus) and patient satisfaction were evaluated.Results: Patient satisfaction was significantly higher in two implant retained overdenture with locator attachment in comparison with their earlier conventional complete denture. Implant survival rate was 100%. However no technical complication was detached in seven patients, patrix deformation was observed as a technical complica...
European oral research, May 5, 2022
Purpose The aim of this study was to determine descriptive characteristics of dental students, to... more Purpose The aim of this study was to determine descriptive characteristics of dental students, to investigate their professional expectations, career decision criteria, and related factors; to examine how (if any) seniority in school affects these. Subjects and Methods During the period of 2018-2019, all 1-5 grade students (n = 754) of Hacettepe University Dental School were invited to participate and those who accepted had filled under observation a standard questionnaire form of 35 questions (83.4%). In the analysis of the data, descriptive statistics, chi-square, Student's t-test and ANOVA and Odds ratio methods were used. Results In this cross-sectional study, 66% of the group were female, age range was 18-30 (mean±SD= 21.2 ± 1.7). The most common reasons for choosing dentistry were "financial benefits", "job security" and "professional status". "Undertake specialist training" (80.2%) was the most common short-term expectation after graduation; two most common long-term expectations were "having a private clinic" (57.9%) and "completing specialization training" (56.0%). The most important factors affecting the post-graduation working plans were work-life balance and economic stability. Conclusion It is recommended to provide adequate counseling and guidance to students about potential career paths to maximize a balanced and widely accessible oral health service delivery across the country with more motivated dentists. Qualitative research may improve our understanding of how dental education can be improved to fulfill students' expectations from school, and to motivate dental students towards general practitioning in the future.
International Journal of Prosthodontics, 2015
The purpose of this retrospective study was to evaluate the 5-year clinical performance and failu... more The purpose of this retrospective study was to evaluate the 5-year clinical performance and failure rate of single-or multiple-unit zirconia-based crowns. Materials and Methods: A total of 148 patients (39 men and 109 women, mean age: 46.9 ± 10.6 years) treated in university and private practices with 618 single-or multiple-unit zirconia-based (Lava) crowns made on natural teeth from January 2007 to December 2008 were included. Two hundred fifty-nine anterior and 359 posterior crowns were examined. A core and/or veneer fracture that required replacement of the restoration was considered to be a failure. The cumulative survival rate (CSR) was described with Kaplan-Meier survival functions. The crowns replaced for other reasons were deemed lost to follow-up, and esthetic, functional, and biologic complications were rated. Results: At the 5-year follow-up, no zirconia core fractures were observed. Twelve veneer fractures that required crown replacement were detected. The CSR was 98.1%. There was a statistically significant difference between survival of the anterior and posterior restorations (P < .001). In total, 116 crowns experienced biologic and technical complications. The most common complications were smooth veneer fracture (4, 0.6%), loss of retention (7, 1%), staining because of smoking (24, 4%), and gingival recession (48, 8%). Conclusions: According to the 5-year CSR (98.1%) observed in this study, zirconia-based single or multiple crowns may be considered an acceptable treatment modality for the replacement of anterior and posterior teeth. Results from the current study should be supported by additional randomized clinical trials.
7tepe klinik, 2019
Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğ... more Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğindeki gelişmeler de hızlanmıştır. Yeni restoratif meteryaller ile tek seansta üretimi mümkün kılan bilgisayar destekli tasarım ve üretim (CAD/CAM) teknolojisi, bu beklentileri karşılar hale gelmiştir. Dental porselenlerin temelini oluşturan feldspatik porselen ve lösitle güçlendirilmiş cam seramiklerin düşük bükülme dayanımı gibi dezavantajlarını elimine etmek amacıyla, seramik yapıya güçlendirici maddeler eklenmiştir. Bu durum tabaklama gerektirmeyen monolitik materyalleri geliştirmiştir. Böylece kor materyali gereksinimi ortadan kalkmıştır ve dolayısı ile porselen-kor bağlantısındaki sorunlar elimine edilmiştir. Sonuçta yapısal bütünlüğü daha güçlü, CAD/CAM üretimine uygun hazır disk ve bloklar kullanıma sunulmuştur. Bu disk ve bloklar yapıya; lityum disilikat, zirkonyum oksit, aluminyum oksit, lösit ve rezin kompozit gibi maddeler eklenerek çeşitli üretim teknikleriyle üretilmektedirler. Bu materyallerin hangi klinik durumlarda tercih edileceği ise; materyalin mekanik, optik ve biyouyumluluk özelliğine göre belirlenmektedir. Bu derlemede ise son zamanlarda popüler hale gelen yüksek dayanımlı cam seramiklerin güncel literatür desteği ile materyal özellikleri incelenmiştir. Anahtar kelimeler: Yüksek dayanımlı cam seramikler, lityum disilikat cam seramik, zirkonyumla güçlendirilmiş cam seramik, biyomateryal özellikler. SUMMARY Day by day, developments in digital dentistry are accelerated with the increase of patient's improved faster and aesthetic treatment expectations. Computer aided design and manufacturing (CAD / CAM) technology makes it possible to manufacture restorations in a single appointment with new restorative materials that meets these expectations of the patients. In order to eliminate the disadvantages of feldspatic porcelain and leucite-reinforced glass ceramics, which is the basis of dental porcelain with low flexural strength, has been added to the ceramic structure for reinforcement of the materials. This has improved monolithic materials that do not require veneering. Thus, the core material has not been needed, and therefore problems with porcelain-core connection have been eliminated. Consequently, prefabricated discs and blocks with stronger structural integrity are available for CAD/CAM. These discs and blocks are made with various production techniques by adding materials such as lithium disilicate, zirconium oxide, aluminum oxide, leucite and resin composite. The clinical situation in which these materials are to be used is determined by the mechanical, optical and biocompatibility of the material. In this review, recent literature support and material properties of high strength glass ceramics, which became popular recently, were examined.
Turkiye Klinikleri Journal of Medical Sciences, 2020
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi, 2016
Kompozit rezinler uzun yıllardır hem restoratif dolgu maddesi olarak hem de adeziv restorasyonlar... more Kompozit rezinler uzun yıllardır hem restoratif dolgu maddesi olarak hem de adeziv restorasyonlarda diş eksikliklerinin giderilmesinde kullanılmaktadır. Artan okluzal yükler karşısında kompozit rezinlerin fiber ile güçlendirilmesi materyalin dayanıklılığını artırmak amacı ile kullanılan bir yöntemdir. Bu invitro çalışmanın amacı fiber ile güçlendirmenin kompozit rezinlerde eğilme direncine olan etkisinin araştırılmasıdır. Gereç ve Yöntem: Farklı fiber dağılımına ve rezin oranına sahip kompozit bloklar (GR 1, GR 2, GR 3,) ve bir deneysel kompozit (GR 4) laboratuvar ortamında hazırlandı. Fiber ile güçlendirilmiş bloklar ve piyasada yer alan hazır kompozit blok (GR 5) kesme cihazı ile ebadı 2x2x25 mm olacak şekilde 5 gruba (n:18) ayrıldı. Örneklere 24 saat 37 C de distile suda bekletildikten sonra Universal test cihazında 1mm/dk hızla eğilme testi uygulandı. Sonuçlar tek yönlü varyans analizi (ANOVA) ile değerlendirildi. Bulgular: Tüm gruplar arasında istatiksel olarak anlamlı farklılık gözlenmiştir (p<0.001). Ortalama eğilme direnci değerleri ve standart sapmaları GR 1, GR 2, GR 3, GR 4 ve GR 5'de sırasıyla 130±6, 125±5.1, 136±6.8, 115±4 ve 85±2.9 bulundu. Gr 3 en yüksek değeri gösterirken, Gr 5 en düşük değeri göstermiştir (p<0.001). Sonuç: Bu invitro çalışmada kompozit rezinlerin cam fiber ile güçlendirilmesi eğilme direncini artırmaktadır.
Clinical Oral Investigations, 2016
This study aims to evaluate the 4-year clinical performance of tooth versus implant-supported sin... more This study aims to evaluate the 4-year clinical performance of tooth versus implant-supported single-unit zirconia crowns (LAVA™) placed on posterior region. Twenty-four patients (10 men and 14 women) who had received 48 single crowns (24 implant-supported and 24 tooth-supported) from January 2007 to December 2009, were included. California Dental Association (CDA) quality assessment system, plaque and gingival index scores were used to evaluate the performance of the crowns at baseline and at all follow-up examinations. During the follow-up period, no fracture of zirconia coping has occurred. Major complication was chipping in three patients that required a new crown fabrication. Except for the failure ones, all crowns in both groups were rated as satisfactory at the follow-up examinations based on the CDA quality assessment criteria. There were no statistically significant differences between tooth and implant-supported crowns in terms of periodontal parameters. The present 4-year follow-up clinical study demonstrates that single-unit tooth- and implant-supported zirconia crowns have similar prosthetic and periodontal outcomes. Single-unit implant or tooth-supported zirconia crowns may be considered acceptable treatment modalities for restoration of either missing or compromised posterior teeth.
Journal of Periodontology, 2008
Background: Further clarification of the early and late response of peri-implant tissues to surgi... more Background: Further clarification of the early and late response of peri-implant tissues to surgical insertion and loading of dental implants and the potential associations among the various implantrelated measures are likely to improve the evaluation/monitoring of implant sites. Thus, analyses were made of the volume and nitric oxide (NO) profile of peri-implant sulcus fluid (PISF), implant stability, and marginal bone level in relation to different prosthetic designs. Methods: Seven totally edentulous subjects and 11 partially edentulous subjects were included. Resonance frequency analysis (RFA), marginal bone level measurements, PISF volume, and spectrophotometrically determined nitrite levels were analyzed comparatively at conventionally loaded (CL) implant sites and at implants with removable prostheses (RP; N = 14) and fixed prostheses (FP; N = 11) for a period of 12 months. Results: At implant sites with RP, PISF volume decreased gradually and its lowest level occurred at the end of the experimental period. The PISF nitrite content increased until 6 months and was followed by a significant decrease at 12 months. Compared to baseline, RFA values exhibited a significant decrease at 1 and 3 months. Marginal bone level was significantly lower at all follow-up visits compared to baseline. More volumetric fluctuations of PISF was noted at implant sites with FP. The PISF nitrite content had decreased, compared to baseline, at 6, 9, and 12 months. A general stability was observed for RFA. The marginal bone loss observed at 6 months was followed by a gain at 12 months. An inverse relationship was noted between RFA values and marginal bone levels. Conclusion: The prosthetic design particularly seems to affect the NO metabolism around CL implants, whereas it does not seem to have any impact on the stability of dental implants.
Clinical Implant Dentistry and Related Research, 2008
Background: As well as gingival crevicular fluid (GCF), peri-implant sulcus fluid (PISF) may have... more Background: As well as gingival crevicular fluid (GCF), peri-implant sulcus fluid (PISF) may have a potential diagnostic value for the early identification of metabolic and destructive processes.
Background Short-time sintering may offer advantages including saving time and energy but there i... more Background Short-time sintering may offer advantages including saving time and energy but there is limited evidence on the effect that altering sintering time has on the accuracy of monolithic zirconia crowns. The purpose of this in vitro study was to investigate the effect of shortened sintering time on the marginal and internal t of 3Y-TZP (three mol% yttria-stabilized tetragonal zirconia polycrystal) and 4Y-TZP (four mol% yttriastabilized tetragonal zirconia polycrystal) monolithic crowns. Methods Sixty monolithic zirconia crowns were fabricated for the maxillary rst molar tooth on the prefabricated implant abutment. Groups were created according to the material composition: 3Y-TZP Generation 1 (alumina wt; ≤0.5%, < 15% cubic phase), 3Y-TZP Generation 2 (alumina wt; ≤0.05%, < 15% cubic phase) and 4Y-TZP (alumina wt; ≤0.05%, > 25% cubic phase). Two different sintering protocols were performed: same nal sintering temperature (1500°C) and various rates of heating (10°C/min and 40°C/min), cooling down speed (-10°C/min and − 40°C/min), holding time (45 and 120 minutes), and total sintering time (approximately 2 and 7 hours, respectively). The marginal and internal t of the crowns were determined using the silicone replica technique. Comparisons between groups and sintering times were analyzed using two-way ANOVA. Pairwise multiple comparisons were performed using the t-test (p < 0.05). Results The mean marginal gap values of 4Y-TZP zirconia revealed statistically signi cant increase for the speed sintering protocol (p < 0.0001), while no difference was observed between the sintering protocols for the mean marginal gap values of 3Y-TZP groups. Conclusions Although all groups showed clinically acceptable gap values (<120 µm), altering the sintering time had an effect on the marginal t of the crowns manufactured from 4Y-TZP zirconia. Shortening the sintering time may lead to differences within clinically acceptable limits. The manufacturer's recommendations according to material composition should be implemented with care.
Clinical Oral Implants Research, 2008
The aim of this prospective clinical study was to evaluate the clinical outcomes of dental implan... more The aim of this prospective clinical study was to evaluate the clinical outcomes of dental implants placed in the mandibular molar sites and immediately functionally restored compared with conventionally loaded controls in an in-patient study. Material and methods: Twenty-four dental implants were placed in 12 patients who had first molar loss bilaterally in the mandibular area. One site of the patient was determined as immediately loaded (IL) and the other side was conventionally loaded (CL). Resonance frequency analyses for implant stability measurements, radiographic examinations for marginal bone levels and peri-implant evaluations were performed during the clinical follow-up appointments within 12 months. Results: During the 12-month follow-up period, only one implant was lost in the IL group. The mean implant stability quotient values were 74.18 AE 5.72 and 75.18 AE 3.51 for Groups IL and CL at surgery, respectively, and the corresponding values were 75.36 AE 5.88 and 75.64 AE 4.84 at 1-year recall, respectively. The difference was not statistically significant between the two groups during the 12-month study period (P40.05). When peri-implant parameters were evaluated, excellent peri-implant health was demonstrated during the 1-year observation period and all implants showed less than 1 mm of marginal bone resorption during the first year. Conclusions: In the present study, immediate functionally loading did not negatively affect implant stability, marginal bone levels and peri-implant health when compared with conventional loading of single-tooth implants.
Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğ... more Hastaların her geçen gün daha estetik ve hızlı tedavi beklentileri arttıkça, dijital diş hekimliğindeki gelişmeler de hızlanmıştır. Yeni restoratif meteryaller ile tek seansta üretimi mümkün kılan bilgisayar destekli tasarım ve üretim (CAD/CAM) teknolojisi, bu beklentileri karşılar hale gelmiştir. Dental porselenlerin temelini oluşturan feldspatik porselen ve lösitle güçlendirilmiş cam seramiklerin düşük bükülme dayanımı gibi dezavantajlarını elimine etmek amacıyla, seramik yapıya güçlendirici maddeler eklenmiştir. Bu durum tabaklama gerektirmeyen monolitik materyalleri geliştirmiştir. Böylece kor materyali gereksinimi ortadan kalkmıştır ve dolayısı ile porselen-kor bağlantısındaki sorunlar elimine edilmiştir. Sonuçta yapısal bütünlüğü daha güçlü, CAD/CAM üretimine uygun hazır disk ve bloklar kullanıma sunulmuştur. Bu disk ve bloklar yapıya; lityum disilikat, zirkonyum oksit, aluminyum oksit, lösit ve rezin kompozit gibi maddeler eklenerek çeşitli üretim teknikleriyle üretilmektedirler. Bu materyallerin hangi klinik durumlarda tercih edileceği ise; materyalin mekanik, optik ve biyouyumluluk özelliğine göre belirlenmektedir. Bu derlemede ise son zamanlarda popüler hale gelen yüksek dayanımlı cam seramiklerin güncel literatür desteği ile materyal özellikleri incelenmiştir. Anahtar kelimeler: Yüksek dayanımlı cam seramikler, lityum disilikat cam seramik, zirkonyumla güçlendirilmiş cam seramik, biyomateryal özellikler. SUMMARY Day by day, developments in digital dentistry are accelerated with the increase of patient's improved faster and aesthetic treatment expectations. Computer aided design and manufacturing (CAD / CAM) technology makes it possible to manufacture restorations in a single appointment with new restorative materials that meets these expectations of the patients. In order to eliminate the disadvantages of feldspatic porcelain and leucite-reinforced glass ceramics, which is the basis of dental porcelain with low flexural strength, has been added to the ceramic structure for reinforcement of the materials. This has improved monolithic materials that do not require veneering. Thus, the core material has not been needed, and therefore problems with porcelain-core connection have been eliminated. Consequently, prefabricated discs and blocks with stronger structural integrity are available for CAD/CAM. These discs and blocks are made with various production techniques by adding materials such as lithium disilicate, zirconium oxide, aluminum oxide, leucite and resin composite. The clinical situation in which these materials are to be used is determined by the mechanical, optical and biocompatibility of the material. In this review, recent literature support and material properties of high strength glass ceramics, which became popular recently, were examined.