Ozgur Genc Sen - Academia.edu (original) (raw)

Papers by Ozgur Genc Sen

Turkiye Klinikleri Endodontics - Special Topics, 2017

Turkiye Klinikleri Endodontics - Special Topics, 2015

Dental fusion is a rare developmental anomaly, which stems from embryogenic union of 2 teeth orig... more Dental fusion is a rare developmental anomaly, which stems from embryogenic union of 2 teeth originating from two different germs. These teeth also tend to be greatly predisposed to caries and periodontal disease and in some cases, endodontic treatment might be complicated. A 15 year-old male patient was referred to our clinic with the chief complaint of pain in the mandibulary incissor region. Clinic and radiographic examinations revealed that two mandibulary permanent central incissors were fused. The fused tooth was devital and had a periapical lesion. Therefore root canal treatment was applied primarily. During the treatment, it was concluded that a surgical approach is required. The fused tooth was extracted and its crown and root was reshaped. After the curettage of periapical granulation tissue, tooth was replantated with otogen bone graft. After 12 month follow-up period, it was seen that tooth was in function and periapical lesion was healed.

Acta Odontologica Turcica, 2016

OBJECTIVE: The aim of this study was to determine the residual monomer leaching from two self-adh... more OBJECTIVE: The aim of this study was to determine the residual monomer leaching from two self-adhesive resin cements polymerized with Light Emitting Diode (LED) or halogen light curing unit. MATERIALS AND METHOD: Clearfil SA (group A, n = 48) and BisCem (group B, n = 48) cements were inserted in plastic moulds. Each group was further divided into two subgroups. Specimens were light cured with LED light curing unit (LCU) in group A1 and group B1 and halogen LCU in group A2 and group B2 for 20 seconds. The following compounds released from the samples stored in distilled water were analyzed: triethylene glycol-dimethacrylate (TEGDMA) and bisphenol A glycidyl methacrylate (Bis-GMA). Analysis of substances was performed with the use of high performance liquid chromatography, after 1 hour and 24 hour incubation periods. Factorial experimental design and independent t -test was used for statistical analyses. RESULTS: Self-adhesive resin cements released more Bis-GMA and TEGDMA when they were polymerized with LED LCUs (p 0.05). Clearfil SA cement released more Bis-GMA than BisCem (p<0.05). BisCem released more TEGDMA than Clearfil SA (p<0.05). CONCLUSION: The results of this study showed that the quantity of Bis-GMA and TEGDMA leached from self-adhesive resin cements was influenced by the type of LCU and by the type of self-adhesive resin cement.

Turkiye Klinikleri Journal of Dental Sciences

Devital dişlerde renklenme, estetik açıdan önemli bir problem oluşturmaktadır. Çoğunlukla ön dişl... more Devital dişlerde renklenme, estetik açıdan önemli bir problem oluşturmaktadır. Çoğunlukla ön dişlerde görülen bu renklenmenin sebebi endodontik tedavi, travma ve pulpa nekrozu gibi çeşitli etkenlerdir. Beyazlatma tedavisi protetik uygulamalara göre daha konservatif bir yaklaşımdır. Dişlerinde renklenme şikâyetiyle kliniğimize başvuran 4 olgunun, beyazlatma tedavi öncesi ve sonrası fotoğrafları kullanılarak tedavi aşamaları anlatılmıştır. Olgu 1 ve olgu 4'ün yetersiz kanal tedavileri yenilenmiş, ardından intrakoronal beyazlatma tedavisi uygulanmıştır. Olgu 2 ve olgu 3 de kanal tedavisi yenilenmesine gerek görülmemiş ve sadece intrakoronal beyazlatma tedavisi uygulanmıştır. Bütün olgularda, "walking bleaching" tekniği kullanılarak başarılı estetik sonuçlar elde edilmiştir. Anah tar Ke li me ler: Dişte renk değişikliği; diş beyazlatma ABS TRACT Discoloration in devital teeth leads to a significant aestetic problem. Discoloration commonly occurs in labial teeth, and caused by various factors as endodontic treatment, trauma and pulpa necrosis. Bleaching is a conservative approach in comparison with prosthetic applications. In the present paper, the treatment phases of four cases applying to our clinic with discoloration were presented using the pre and post-treatment photographs. Cases 1 and 4 had insufficient root canal therapies, therefore retreatment was performed before introcoronal bleaching. Cases 2 and 3 did not need a retreatment, therefore introcoronal bleaching was performed only. Walking bleaching tecnique was used in all cases with successful aestethic results.

$Research paper thumbnail of Effect of final irrigation protocols on the fracture resistance of roots with varying dentine thickness$

European Journal of Oral Sciences, 2021

This study evaluated the effects of 9% etidronic acid (HEBP) and 17% ethylenediaminetetraacetic a... more This study evaluated the effects of 9% etidronic acid (HEBP) and 17% ethylenediaminetetraacetic acid (EDTA) used either with conventional syringe irrigation (CSI) or passive ultrasonic irrigation (PUI) on the fracture resistance of roots with different dentine thickness. The root canals of 120 extracted teeth were widened, leaving dentinal walls with different thicknesses of either 0.75 mm, 1.50 mm, or 2.25 mm with 40 teeth in each group. Within each of these groups, four subgroups (n = 10) were formed according to the final irrigation regimens applied: 2.5% NaOCl-17% EDTA with CSI; 2.5% NaOCl-17% EDTA with PUI; 2.5% NaOCl + 9% HEBP with CSI; 2.5% NaOCl + 9% HEBP with PUI. The irrigated root canals were obturated with AH Plus sealer and gutta-percha cones. A compressive vertical loading was applied to the samples and the force at fracture was recorded. Data were statistically analysed using a multiple linear regression analysis. The most influencing factor for the fracture strength of roots was the remaining dentine thickness, followed by the irrigation method, and then the irrigation solution. The samples irrigated using PUI were statistically significantly more resistant to fracture than those using CSI (mean difference = 116.3 N; 95% CI = [53.9, 178.6] N). The application of HEBP was associated with higher resistance to fracture than the application of EDTA (mean difference = 71.0 N; 95% CI = [8.6, 133.3] N).

International Endodontic Journal, 2021

AIM This randomized clinical trial aimed to assess the effect of two rotary (ProTaper Retreatment... more AIM This randomized clinical trial aimed to assess the effect of two rotary (ProTaper Retreatment + ProTaper Gold and Hyflex EDM) and two reciprocating (Reciproc Blue and WaveOne Gold) NiTi systems on postoperative pain after root canal retreatment on single-rooted incisor teeth. METHODOLOGY One hundred and eighty patients scheduled for root canal retreatment were randomly assigned to one of the four groups according to the NiTi system (ProTaper Retreatment + ProTaper Gold, Hyflex EDM, Reciproc Blue or WaveOne Gold) used for removal of root canal fillings and further canal preparation. The working length was determined to be 1 mm shorter than the "0.0" mark of the apex locator. Root canals were filled with gutta-percha and epoxy resin-based root canal sealer using a lateral condensation technique. The teeth were restored using a resin composite material. A single operator performed the retreatments in a single visit. The incidence and intensity of postoperative pain were rated on a numeric rating scale by patients at 24, 48, and 72 h after retreatment. The number of analgesic tablets (400 mg Ibuprofen) taken by patiens was also recorded. Data were analysed using Mann - Whitney U, Wilcoxon, and chi-square tests. RESULTS For the intensity of postoperative pain, the difference between the four groups was not significantly different (P > 0.05). No significant difference was found between the groups in terms of analgesic medication intake (P > 0.05). CONCLUSIONS The rotary and reciprocating NiTi systems tested in this study were associated with similar levels of postoperative pain and intake of analgesics following root canal retreatment on single-rooted incisor teeth completed in one visit.

AYDIN DENTAL

Complete elimination of microorganisms from the root canal system is crucial for the healing proc... more Complete elimination of microorganisms from the root canal system is crucial for the healing process of an endodontic lesion. Nevertheless, some species of bacteria can cope with root canal irrigants, survive in the dentinal tubules for years and cause persistent periradicular lesions. In the last decade, diode lasers received wide acceptance in laser-supported endodontics because of their impactful and deep-reaching disinfection ability. This case report presents the fast healing of a periapical lesion as a result of performing intra-canal laser disinfection in conjunction with conventional root canal treatment procedures.

License, which permits unrestricted use, distribution, and reproduction in any medium, provided t... more License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Many systemic and local factors can cause paresthesia, and it is rarely caused by infections of dental origin. This report presents a case ofmental nerve paresthesia caused by endodontic infection of amandibular left second premolar. Resolution of the paresthesia began two weeks after conventional root canal treatment associated with antibiotic therapy and was completed in eight weeks. One year follow-up radiograph indicated complete healing of the radiolucent periapical lesion. The tooth was asymptomatic and functional. 1.

Yeditepe Dental Journal, 2019

Tek kon guta-perkanın kanal preparasyonu ile iyi uyum göstermesi, kök kanal dolgusunun tıkama etk... more Tek kon guta-perkanın kanal preparasyonu ile iyi uyum göstermesi, kök kanal dolgusunun tıkama etkinliği açısından büyük önem taşımaktadır. Bu çalışmanın amacı, WaveOne (WO) ve WaveOne Gold (WOG) ile şekillendirilen ve bu sistemlere özel üretilmiş guta-perka (GP) kullanılarak doldurulan kanallardaki guta-perka (GP) oranlarının belirlenmesidir. Gereç ve Yöntem: Otuz adet çekilmiş tek köklü insan dişi kullanıldı. Diş kronları elmas frezlerle uzaklaştırıldı ve kök kanal boyları belirlendi. On beş dişin preparasyonu WO Primary eğe ile yapılıp, WO Primary tek konlarla dolduruldu. Kalan 15 dişin preparasyonu için WOG Primary eğe, doldurulması içinse WOG Primary tek konlar kullanıldı. Kökler apekse 3, 5, 8 mm mesafelerden kesildi ve büyütme altında fotoğraflandı. GP ile doldurulmuş alanların yüzdesi, Imaje J programında hesaplandı. İstatistiksel analizler için bağımsız t testi ve Mann-Whitney U testleri kullanıldı. Bulgular: İki grup arasında, 8 mm seviyesinde anlamlı fark bulundu (p<0,05). WOG grubunda GP ile dolu alanların yüzdesinin anlamlı düzeyde yüksek olduğu belirlendi. Grup içi karşılaştırmalar, her iki grupta da üç seviyedeki guta perka yüzdeleri arasında önemli istatistiksel fark bulunamadığını gösterdi (p>0,05). Sonuç: Bu çalışma koşullarında WOG kökün koronal üçlü seviyesinde WO'a göre daha iyi tıkama sağlamıştır. Anahtar kelimeler: Guta-perka, kök kanal dolgusu, tıkama kalitesi, Waveone, Waveone Gold. SUMMARY Aim: The fitness of single cone gutta-percha to canal preparation is of great importance in obturation quality of root canal filling. The aim of this study was to determine the percentage of gutta-percha-filled areas in canals prepared by WaveOne (WO) and WaveOne Gold (WOG) instruments and obturated with their matching single cones. Material and Methods: Thirty extracted single-rooted human teeth were used. The crowns were removed using diamond burs and working lengths were established. Fifteen roots were prepared using WO Primary and obturated with WO Primary single cones. The remaining 15 roots were prepared using WOG Primary instrument and obturated with WOG Primary single cones. The roots were sectioned at 3, 5 and 8 mm from the apex and photographed under magnification. The percentages of gutta-percha-filled areas were calculated using Image J software. Independent t test and Mann Whitney U tests were used for statistical analysis. Results: There was a statistically significant difference between two groups at 8 mm levels (p<0.05). The percentage of gutta-percha filled areas in WOG group was significantly higher. In-group comparisons showed no significant differences in terms of gutta-percha percentages among three levels, in both groups. Conclusion: Under the conditions of this study, WOG exhibi-ORIGINAL RESEARCH 205 7tepeklinik ted a better obturation at coronal third level in comparison to WO.

Objective: This study aims to evaluate alterations in the root canal dentin after irrigation with... more Objective: This study aims to evaluate alterations in the root canal dentin after irrigation with EDTA, HEBP, and Chitosan in order to determine the push-out bond strengths of the different root canal sealers on altered dentin surfaces. Materials And Methods: Crowns of 70 maxillary single-rooted teeth were removed to obtain a standardized length of 16 mm. The canals were instrumented using rotary files and the step back technique. The master apical file used in this study was #40. The subgroups were determined based on the chelation agent and the material of the root canal sealer that was used (17% EDTA, 18% HEPB, 0.2% Chitosan, Well Root ST (WRST) or AH Plus). Three slices with 1 mm thickness were cut from the root thirds of each tooth and subjected to a push-out test. The data (MPa) were analyzed using a one-way ANOVA and a Duncan’s multiple comparison test at a level of α = 0.05. Finally, scanning electron microscope (SEM) photographs were taken. Results: Groups that used WRST ex...

Clinical Oral Investigations, 2019

Objectives The aim of this randomized clinical trial was to assess the effect of solvent use duri... more Objectives The aim of this randomized clinical trial was to assess the effect of solvent use during the removal of root canal filling on postoperative pain after retreatment. Materials and methods Ninety patients scheduled for root canal retreatment were randomly assigned to one of the following two groups according to the root canal filling removal procedure used: ProTaper retreatment (Dentsply Maillefer, Ballaigues, Switzerland) instruments or ProTaper retreatment instruments in combination with gutta-percha solvent. A single operator performed the retreatments in a single visit. The incidence and intensity of the postoperative pain were rated on a numeric rating scale by patients at 24, 48, and 72 h after retreatment. The analgesic tablet intake number was also recorded. Data were analyzed using Mann-Whitney U, Wilcoxon, and chi-square tests. Results For the intensity of postoperative pain, the difference between the two groups was not statistically significant. Moreover, no statistically significant difference was found between the two groups in terms of analgesic medication intake (P > 0.05). Conclusions The processes involving the use and non-use of a solvent in the removal of root canal fillings were found to be equivalent in terms of postoperative pain intensity and analgesic intake. Clinical relevance Some in vitro studies claimed that the use of a gutta-percha solvent in the removal of root canal fillings tends to reduce postoperative pain since extrusion of debris was significantly less. This randomized clinical trial indicates that the removal of root canal fillings with or without the use of a solvent was associated with equivalent postoperative pain intensity and analgesic intake. This study is registered in the www.ClinicalTrials.gov database with the identifier number NCT03756363.

Photobiomodulation, Photomedicine, and Laser Surgery, 2019

Objective: The aim of this randomized clinical trial was to evaluate the influence of root canal ... more Objective: The aim of this randomized clinical trial was to evaluate the influence of root canal disinfection with a 940-nm diode laser on the intensity of pain after endodontic retreatment. Background data: Microorganisms are the most common causes of tooth pain. Therefore, clinical studies are needed to explore the effect of disinfection techniques on postoperative pain. Methods: Eighty-four patients scheduled for endodontic retreatment were allocated to two groups in a 1:1 ratio (n = 42 each). After root canal filling removal and chemomechanical procedures, the root canals were disinfected with a 940-nm diode laser in one group [laser disinfection (LD) group]. In the other group, a mock application of laser was made with the power off [pseudo-laser disinfection (PLD) group]. All retreatment procedures were completed in a single visit. The patients assessed their pain levels at 24, 48, and 72 h after retreatment using a numeric rating scale. The number of analgesic pills used during this period was also recorded. The collected data were statistically analyzed using Mann-Whitney U and Wilcoxon tests. Results: Postoperative pain on the first 2 days was significantly lesser in the LD group than in the PLD group (p < 0.05), and the difference became insignificant on the third day (p > 0.05). Moreover, analgesic intake over 3 days and pain on percussion on the fourth day were significantly lesser in the LD group than in the PLD group (p < 0.05). Conclusions: Elimination of microorganisms from root canals is important for preventing postoperative complications. Our findings suggest that diode LD can reduce postoperative pain and provide comfort after endodontic retreatment. This study is registered in www.ClinicalTrials.gov database with the identifier number NCT03584880.

Photomedicine and laser surgery, Jan 21, 2017

To evaluate the safety of sodium hypochlorite (NaOCl) irrigation using three different techniques... more To evaluate the safety of sodium hypochlorite (NaOCl) irrigation using three different techniques during the final rinse in overinstrumented root canals. The effect of irrigant activation on irrigant extrusion from overinstrumented root canals is still unclear. A total of 30 single-rooted teeth were decoronated. The working lengths were determined and the roots were divided into two groups of 15 teeth each: group 1, instrumentation 0.5 mm short of the apical foramen and group 2, instrumentation 0.5 mm beyond the apical foramen (overinstrumented). Needle irrigation (NI), sonic irrigation with EndoActivator (EAI), and laser-activated irrigation (LAI) were used for the final rinse in each group; each root underwent the three irrigation procedures in a randomized crossover manner. A modified container-foam model was used to collect apically extruded NaOCl. The weight of the extruded NaOCl was calculated by subtracting the initial weights of the containers from their final weights. All d...

International Scholarly Research Notices, 2014

Mechanical instrumentation of root canals produces a smear layer that adversely affects the root ... more Mechanical instrumentation of root canals produces a smear layer that adversely affects the root canal seal. The aim of this study was to evaluate efficacy of MTAD and citric acid solutions used with self-adjusting file (SAF) system on smear layer. Twenty-three single-rooted human teeth were used for the study. Canals were instrumented manually up to a number 20 K file size. SAF was used to prepare the root canals. The following groups were studied: Group 1: MTAD + 5.25% NaOCl, Group 2: 20% citric acid + 5.25% NaOCl, and Group 3: Control (5.25% NaOCl). All roots were split longitudinally and subjected to scanning electron microscopy. The presence of smear layer in the coronal, middle, and apical thirds was evaluated using a five-score evaluation system. Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis. In the coronal third, Group 2 exhibited the best results and was statistically different froms the other groups (P<0.05). There was not a significant diff...

International Endodontic Journal, 2009

Kıvanç BH, Alaç am T, Ulusoy Ö _ IA, Genç Ö , Gö rgü l G.

Australian Endodontic Journal, 2008

The aim of this study was to investigate whether the use of operating microscope in combination w... more The aim of this study was to investigate whether the use of operating microscope in combination with ultrasonics increased the rate of second mesiobuccal (MB2) canal detection in permanent maxillary first molar teeth. A hundred extracted human maxillary first molars were assessed. After location of the main canals, the MB2 canal was sought in all teeth first without microscopy, then with the aid of the operating microscope and finally with the combined use of the operating microscope and ultrasonics. With these techniques, the MB2 canal was detected in 62%, 67% and 74% of the teeth, respectively. The combination of the operating microscope and ultrasonics detected significantly more MB2 canals than when no microscopy was utilized (P < 0.05). Sectioning of the roots disclosed the presence of the MB2 canal in 82% of the teeth. Twenty-nine per cent of the teeth had a separate MB2 canal orifice and separate apical foramina. The results of this study suggested that the combined use of the operating microscope and ultrasonics increased the detection of MB2 canals in maxillary first permanent molars.

The purpose of this study was to evaluate the effect of metal orthodontic brackets on the accurac... more The purpose of this study was to evaluate the effect of metal orthodontic brackets on the accuracy of electronic apex locator (EAL). The actual canal lengths (ACL) of 40 mandibular incisor teeth were determined. Then, the teeth were randomly divided into two groups (n = 20). Orthodontic metal brackets were applied in the first group, and no brackets, in the second group. The working length of each tooth was measured with an EAL under 3 test conditions according to the distance between the lip clip and sample tooth. Data were analyzed using one-way repeated measures analysis of variance and Tukey's post hoc tests (p = 0.05). In the bracketed samples, when the lip clip was located at 1 cm and 2 cm from the samples. The mean differences between the EAL measurements and ACLs were statistically higher than those when the samples were located 3 cm from the lip clip (p < 0.05). There were also statistically significant differences between EAL measurements and ACLs in the bracketed s...

Van Medical Journal, 2017

Objective: Debris extrusion during root canal preparation may cause various post-operative compli... more Objective: Debris extrusion during root canal preparation may cause various post-operative complications. The aim of this study was to compare the amount of debris extruded apically associated with the use of different single-file systems during root canal preparation. Materials and Methods: Seventy-five mandibular premolar teeth were randomly divided into 5 groups of 15 teeth each. Group 1, OneShape; group 2, WaveOne; group 3, OneFile with reciprocating motion; group 4, OneFile with rotational motion; and group 5, Reciproc. Irrigant and debris extruded during instrumentation were collected in pre-weighed Eppendorf tubes. In order to determine the dry weight of the extruded debris, tubes were stored in an incubator at 68°C for 5 days then weighed again. Initial weights of the tubes were subtracted from last weights. Data were statistically evaluated via the Kruskal-Wallis test. Results: There were no statistically significant differences between the amounts of apically extruded debris in any of the groups (p > 0.05). Conclusion: In this study, all the single-file systems used resulted in some debris extrusion. The OneShape file was associated with the least debris extrusion.