Gul Ozgunaltay - Academia.edu (original) (raw)

Papers by Gul Ozgunaltay

Research paper thumbnail of Farklı iki ışık kaynağının akışkan restoratif materyallerin kenar sızıntıları üzerine etkisi

Hacettepe Dişhekimliği Fakültesi Derg.(. Clinical Dentistry and Research), 2007

Research paper thumbnail of Bond strength of a self-etching adhesive system to caries-affected dentin

PubMed, Apr 20, 2004

This in vitro study evaluated the microtensile bond strengths of sound versus caries-affected den... more This in vitro study evaluated the microtensile bond strengths of sound versus caries-affected dentin using a self-etching adhesive system, Clearfil SE Bond, with or without additional acid pre-conditioning. Extracted human mandibular molars with occlusal caries extending halfway through the dentin were used. In the first group, the teeth were bonded with the self-etching adhesive Clearfil SE Bond according to the manufacturer's instructions. In the second group, prepared dentin surfaces were etched with 37% phosphoric acid prior to applying the same self-etching adhesive. After the bonding procedure, all specimens were built up with composite resin and stored in water for 24 hours. The teeth were serially sectioned vertically into 0.7-mm slabs and trimmed into an hourglass shape for measuring microtensile bond strength. Each specimen was attached to a Bencor device and stressed in tension at a crosshead speed of 1 mm/minute. Statistical analysis was performed using two-way ANOVA and the Tukey HSD test (p<0.05). The microtensile bond strengths of Clearfil SE Bond to sound dentin (32.9) were significantly higher than to caries-affected dentin (15.9). In the second group where acid etching was performed prior to applying Clearfil SE Bond, there were no statistically significant differences between the microtensile bond strengths of sound (19.2) and caries-affected dentin (16.3). While bond strengths to sound dentin were decreased by using additional acid etching prior to applying Clearfil SE Bond, this procedure revealed no statistically significant differences in bond strengths for the caries-affected dentin.

Research paper thumbnail of A scanning electron microscopic study of different caries removal techniques on human dentin

PubMed, Jul 18, 2002

Scanning electron microscopy (SEM) evaluated the effect of different caries removal techniques on... more Scanning electron microscopy (SEM) evaluated the effect of different caries removal techniques on human dentin topography. Thirty-six extracted human carious mandibular molars were randomly assigned to six groups according to caries removal technique. Carious tissue was removed by hand excavation, bur excavation, air-abrasion, laser ablation, chemomechanical methods and sono-abrasion. The remaining dentin surfaces were replicated and gold-coated. The surfaces were examined using SEM and distinct differences in appearance were observed among specimens treated with different caries removal techniques. While hand-excavated, bur-excavated and air-abraded carious dentin surfaces were covered with a residual smear layer, sono-abrasion with patent dentinal tubules completely removed the smear layer. A few patent orifices of dentinal tubules were observed in dentin subjected to laser ablation and chemo-mechanical caries removal.

Research paper thumbnail of <i>In vitro</i> comparison of the efficacy of Carisolv<sup>TM</sup> and conventional rotary instrument in caries removal

Journal of Oral Rehabilitation, Nov 26, 2003

summary The purpose of this in vitro study was to compare the efficacy of a new chemomechanical ... more summary The purpose of this in vitro study was to compare the efficacy of a new chemomechanical caries removal agent, CarisolvTM (MediTeam AB, Sävedalen, Sweden), with conventional slow‐speed rotary instrument (bur). Fourteen extracted human molar teeth with deep dentine caries and no enamel coverage were selected for the study. Their laser fluorescence values were over 30 (DIAGNOdent®; KaVo, Biberach, Germany). After the teeth were sectioned through the centre of the carious lesion, one half was removed with conventional drilling (bur); the other half was removed with Carisolv gel. Removal of carious dentine was continued until the lesion was deemed caries‐free by visual and tactile criteria. The preparation time for each caries removal technique was also noted. The two halves of each tooth were fixed in 10% buffered‐formaldehyde for 1 week. They were then decalcified, dehydrated and embedded in paraffin blocks for histological studies. After taking serial sections of 5 μm thickness, sections were mounted on glass slides, deparaffinized, dehydrated and stained with toluidine blue for observation under a light microscope. Each section was examined for the presence of bacteria. Complete removal of caries was achieved in 13 (93%) of 14 conventionally prepared teeth, and 5 (36%) of 14 chemomechanically prepared teeth (P &lt; 0·05). Mean (±SD) time for caries removal was 272 s (±53·3) with Carisolv, and 116 s (±49·4) with drilling. The results of this study suggest that conventional rotary instrument (bur) was more effective than Carisolv in removal of carious tissue and also takes shorter time.

Research paper thumbnail of Çürüksüz Servikal Lezyonlara Self-Etch Adeziv Sistem Ile Uygulanan Farklı Yapıdaki Kompozit Rezin Restorasyonların 12 Aylık Klinik Değerlendirmesi

Gazi Üniversitesi Diş Hekimliği Fakültesi Dergisi, Nov 16, 2011

Research paper thumbnail of Clinical evaluation of a nanohybrid and a flowable resin composite in non-carious cervical lesions: 24-month results

Journal of Adhesive Dentistry, Aug 1, 2012

To evaluate the 24-month clinical performance of cervical restorations using a nanohybrid and a f... more To evaluate the 24-month clinical performance of cervical restorations using a nanohybrid and a flowable resin composite with a one-step self-etching adhesive. Twenty-one patients with at least one pair of non-carious cervical lesions participated in this study. A total of 134 non-carious cervical lesions were restored (67 with a nanohybrid resin composite, Grandio; 67 with a flowable resin composite, Grandio Flow) using a one-step self-etching adhesive system, Futura Bond NR, by one dentist. The restorations were evaluated for retention, color match, marginal discoloration, marginal adaptation, surface texture, anatomic form, and secondary caries by two calibrated examiners at baseline and after 6, 12, and 24 months using modified USPHS criteria. The survival rates of the restorations were calculated by the Kaplan-Meier estimator. The comparison of resin composites for each category was performed with the Pearson chi-square test, and the performance of restorations at baseline and after each recall time was evaluated using McNemar&amp;amp;amp;amp;amp;amp;amp;amp;#39;s test (p &amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.05). All patients attended the 24-month recall. The retention rates at 6 months were 66% and 58%, and 61% and 57% at 12 months for Grandio and Grandio Flow, respectively. At the 24-month recall, the retention rate was 60% for Grandio and 54% for Grandio Flow. No statistically significant differences were found in retention rates among the restorative materials in any evaluation period (p &amp;amp;amp;amp;amp;amp;amp;amp;gt; 0.05). For marginal discoloration and anatomical form, three Grandio and three Grandio Flow restorations showed Bravo scores at the end of 24 months. The restorations in both groups had Alfa ratings of 100% for the rest of the criteria evaluated. The nanohybrid and flowable resin composites showed similar clinical performances in the restoration of non-carious cervical lesions over 24 months.

Research paper thumbnail of Clinical evaluation of different adhesives used in the restoration of non-carious cervical lesions: 24-month results

Australian Dental Journal, Jan 31, 2013

Background: The aim of this study was to compare after 24 months the clinical performance of cerv... more Background: The aim of this study was to compare after 24 months the clinical performance of cervical restorations placed with the use of an etch-and-rinse and an all-in-one adhesive. Methods: Twenty-four patients with at least one pair of non-carious cervical lesions participated in this study. One hundred and twenty-three cervical lesions were restored (62 etch-and-rinse adhesive, Solobond M; 61 all-in-one adhesive, Futurabond NR). A nanohybrid resin composite, Grandio, was used as the restorative material. Restorations were evaluated according to modified USPHS criteria by two independent examiners. The survival rates of the restorations were calculated by the Kaplan-Meier estimator and log-rank test. The restorations in each category were compared using the Pearson chi-square test, while the performance of restorations at the baseline and at each recall time was evaluated by McNemar's test (p < 0.05). Results: The recall rate of patients was 100%. The retention rates were 82% and 75% at 6 months and 77% and 62% at 12 months for Solobond M and Futurabond NR, respectively. At the 24-month recall, the retention rate was 69% for Solobond M and 49% for Futurabond NR, and this difference was statistically significant (p < 0.05). No statistically significant difference was found for colour match, marginal staining, or marginal adaptation between the adhesives (p > 0.05). None of the restorations had secondary caries, loss of anatomical form, or surface texture changes. Conclusions: Cervical restorations placed with an etch-and-rinse adhesive showed higher retention than an all-in-one adhesive.

Research paper thumbnail of Three-year Clinical Evaluation of Different Restorative Resins in Class I Restorations

Operative Dentistry, Apr 1, 2014

The aim of the present study was to evaluate the three-year clinical performance of a nanofilled ... more The aim of the present study was to evaluate the three-year clinical performance of a nanofilled resin composite, a packable resin composite, and silorane-based resin restorations in Class I occlusal cavities. Twenty-eight patients with at least three similar-sized occlusal lesions in molar teeth participated in the study. A total of 84 Class I occlusal restorations were placed: 28 with nanofilled resin composite (Filtek Supreme), 28 with packable resin com

Research paper thumbnail of Cuspal Deflection in Premolar Teeth Restored Using Current Composite Resins With and Without Resin-modified Glass Ionomer Liner

Operative Dentistry, Apr 1, 2013

Using a recently introduced silorane-based composite resin, Filtek Silorane, and the placement of... more Using a recently introduced silorane-based composite resin, Filtek Silorane, and the placement of resin modified glass ionomer cement liner under the composite resin restorations resulted in reduced cuspal deflection. SUMMARY Aim: To evaluate the effects of four different types of composite resins and a resin modified glass ionomer cement (RMGIC) liner on the cuspal deflection of large MOD cavities in vitro. Materials & Methods: One hundred twenty-eight extracted human upper premolar teeth were used. After the teeth were divided into eight groups (n=16), standardized large MOD cavities were prepared. The distance between cusp tips was measured before and after the cavity preparations with a digital micrometer. Then the teeth were restored with different resin composites (Filtek Supreme XT,

Research paper thumbnail of Polymerization Shrinkage of Different Types of Composite Resins and Microleakage With and Without Liner in Class II Cavities

Operative Dentistry, Apr 1, 2014

The use of RMGIC liner with composite resin restorations reduces microleakage. The silorane-based... more The use of RMGIC liner with composite resin restorations reduces microleakage. The silorane-based composite showed lower volumetric polymerization shrinkage than methacrylate-based composites.

Research paper thumbnail of Farklı adeziv sistemlerle çürüksüz servikal lezyonlara uygulanan restorasyonların bir yıllık klinik değerlendirilmesi

Hacettepe Dişhekimliği Fakültesi Derg.(. Clinical Dentistry and Research), 2009

Research paper thumbnail of Effect of finishing and polishing procedures on surface roughness of tooth-colored materials

Quintessence International, Oct 1, 2009

Objectives: To evaluate the effect of 2 polishing systems on surface roughness of tooth-colored r... more Objectives: To evaluate the effect of 2 polishing systems on surface roughness of tooth-colored restorative materials. Method and materials: The materials included 3 flowable resins (Admira Flow, Voco; Dyract Flow, Dentsply; Filtek Flow, 3M ESPE) and a micro?hybrid composite resin (Filtek Z250, 3M ESPE). Eighteen specimens of each material were prepared using a Plexiglas well covered by a Mylar strip (10 mm in diameter and 2 mm in depth). The Ra (baseline) was measured with a Mitutoyo Surftest-402 Surface Roughness Tester (Mitutoyo) with a standard cut-off value of 0.8 mm. Five tracings at different locations on each specimen were made. The specimens were then randomly divided into two finishing and polishing groups (n = 9): (1) Sof-Lex Pop-on disks (3M ESPE), and (2) Astropol and Astrobrush system (Ivoclar Vivadent). After finishing and polishing, surface roughness of the specimens was remeasured. Data were analyzed using 1- and 2-way ANOVA, at P < .05. Results: The Mylar strip produced the smoothest surface in all restorative materials, while 2-way ANOVA demonstrated a significant difference for the finishing and polishing procedures (P = .000). The smoothest surface was generated with Sof-Lex Pop-on disks for all the materials tested. In procedure 2 (diamond bur/Astropol and Astrobrush system), Admira Flow group received the highest average surface roughness value, and a significant difference was revealed between Admira Flow and the other resins (P = .001). Conclusion: Sof-Lex Pop-on disks produced a smoother surface than Astropol and Astrobrush silicone polishers for microhybrid and flowable composites.

Research paper thumbnail of The effect of saliva contamination on microleakage of an etch-and-rinse and a self-etching adhesive

Journal of Adhesive Dentistry, Jun 1, 2007

Purpose: To evaluate the effect of saliva contamination on the microleakage of an etch-and-rinse ... more Purpose: To evaluate the effect of saliva contamination on the microleakage of an etch-and-rinse adhesive and a self-etching adhesive. Materials and methods: Class V cavity preparations at the cementoenamel junction were made on the buccal and lingual surfaces of 40 freshly extracted human molars. The teeth were randomly assigned into two groups for different adhesives: Group I, Single Bond (two-step etch-and-rinse adhesive) and Group II, Futura Bond NR (one-step self-etching adhesive). The adhesive materials were applied according to their manufacturers' recommendations. The specimens were then further subdivided into five subgroups (A-E; n = 8): group A, contamination before adhesive curing; group B, contamination before adhesive curing and re-application of adhesive; group C, contamination after adhesive curing; group D, contamination after adhesive curing and re-application of adhesive; and group E, no contamination (control). Contamination of adhesive surfaces was performed with fresh natural saliva and the saliva was removed by a gentle air blast. The specimens were restored with Z250 hybrid composite. After thermocycling (500x, 5 degrees C to 55 degrees C) and immersion in 0.5% basic fuchsin, the dye penetration was evaluated under a stereomicroscope. Statistical analysis was performed with the Kruskal-Wallis test at p < 0.05. Results: No statistically significant differences were found among the contamination subgroups on the enamel or on the dentin for either group (p > 0.05). There was no significant difference in leakage between Group I and Group II for any subgroup (p > 0.05). Conclusion: Contamination of adhesives with saliva before and after adhesive curing did not worsen the microleakage of the two-step etch-and-rinse adhesive Single Bond or the one-step self-etching adhesive Futura Bond NR.

Research paper thumbnail of Restorasyonların yenilenme nedenlerinin Hacettepe Üniversitesi Diş Hekimliği Fakültesi Diş Hastalıkları ve Tedavisi Anabilim Dalı öğrenci kliniğine başvuran hastalarda değerlendirilmesi

Hacettepe Dişhekimliği Fakültesi Derg.(. Clinical Dentistry and Research), 2009

Research paper thumbnail of Clinical Evaluation of a Silorane- and a Methacrylate-Based Resin Composite in Class II Restorations: 24-Month Results

Operative Dentistry, Jul 1, 2017

This clinical study found that both silorane-and methacrylate-based resin composite restorations ... more This clinical study found that both silorane-and methacrylate-based resin composite restorations showed clinically acceptable performance after 24 months in class II slot restorations. SUMMARY Objective: To compare the 24-month clinical performance of two different resin composites in class II slot restorations. Methods and Materials: Thirty-seven patients having at least two approximal carious lesions were enrolled in the study. A total of 116 teeth (58 pairs) were restored with either a siloranebased composite (Filtek Silorane) and its selfetch adhesive (Silorane Adhesive System, 3M ESPE) or a methacrylate-based packable resin composite (X-tra Fil) and its self-etch adhesive (Futurabond NR, VOCO GmbH) according to the toss of a coin. The restorations were evaluated at baseline and at six-, 12-, and 24month recalls by two calibrated examiners according to the modified US Public Health Service criteria. The comparison of the two restorative materials for each category was performed with the Pearson chi-square test. Within group differences of the materials at different recall times were compared using the Cochran Q and Friedman tests. Bonferroniadjusted McNemar test was used when significant difference was found (p,0.05). Results: After 24 months, no statistically significant differences were found between the two restorative materials for the criteria evaluated. Conclusions: Both silorane-and methacrylatebased resin composites showed clinically acceptable performance in class II slot restorations after 24 months.

Research paper thumbnail of Bond strength of one-step self-etch adhesives and their predecessors to ground versus unground enamel

European Journal of Dentistry, 2012

ABSTRACTObjectives: The aim of this study was to compare the shear bond strength of several self-... more ABSTRACTObjectives: The aim of this study was to compare the shear bond strength of several self-etch adhesives to their two-step predecessors to ground and unground enamel.Methods: Seventy-five extracted, non-carious human third molar teeth were selected for this study. The buccal surfaces of each tooth were mechanically ground to obtain flat enamel surfaces (ground enamel), while the lingual surfaces were left intact (unground enamel). The teeth were randomly divided into five groups according to the adhesive systems (n=15): one-step self-etch adhesive - Clearfil S3 Bond, its two-step predecessor - Clearfil SE Bond, one-step self-etch adhesive - AdheSE One, and its two-step predecessor - AdheSE, and a two-step etch-and-rinse adhesive - Adper Single Bond 2(control). After application of the adhesives to the buccal and lingual enamel surfaces of each tooth, a cylindrical capsule filled with a hybrid composite resin (TPH) was seated against the surfaces. The specimens were stored in ...

Research paper thumbnail of Clinical Follow-up of a Fissure Sealant Placed Using Different Adhesive Protocols: A 24-month Split-mouth Study

Operative Dentistry, Jul 1, 2018

The purpose of this study was to evaluate the retention rates of a fissure sealant placed using d... more The purpose of this study was to evaluate the retention rates of a fissure sealant placed using different adhesive protocols over 24 months. Twenty-four subjects with no restorations or caries received fissure sealants (Clinpro Sealant, 3M ESPE) placed using different adhesive protocols. A total of 292 sealants were placed as follows by two previously calibrated dentists using a table of random numbers (n=73): group I, acid-etch/without adhesive; group II, with a self-etch adhesive (Adper Easy Bond, 3M ESPE); group III, with an etch-andrinse adhesive (Adper Single Bond 2, 3M ESPE); group IV, with acid + self-etch adhesive (Adper Easy Bond). Two other calibrated examiners independently evaluated the sealants at baseline and at six-, 12-, 18-, and 24-month recalls. Each sealant was evaluated in terms of caries formation being present or absent and retention using the following criteria: 1 = total retention, 2 = partial loss, and 3 = total loss. Pearson's v 2 test was used to evaluate differences in retention rates among the sealants for each evaluation period. At the end of 24 months, total retention rates were 57.5%, 27.4%, 84.9%, and 76.7% in the acid-etch, selfetch adhesive, etch-and-rinse adhesive, and acid + self-etch adhesive groups, respectively. Although there were no statistically significant differences between the retention rates among the adhesive protocols at 6 months (p=0.684), significant differences were observed at the 12-, 18-, and 24-month evalua

Research paper thumbnail of İki̇ Farkli Poli̇saj Yöntemi̇ni̇n Posteri̇or Di̇şlerde Kullanilan Kompozi̇t Materyalleri̇ Üzeri̇ne Etki̇si̇-The Effect of Two Different Polishing Technique on Posterior Composite Materials

DergiPark (Istanbul University), Jun 5, 2013

Research paper thumbnail of Fracture resistance of teeth with Class II bonded amalgam and new tooth-colored restorations

PubMed, Oct 9, 2003

This study compared the cuspal fracture resistance of posterior teeth restored with four differen... more This study compared the cuspal fracture resistance of posterior teeth restored with four different adhesive restorations. Fifty sound, maxillary human premolars were randomly divided into a control group and four experimental groups with 10 teeth in each. Specimens in the first group were intact teeth that were tested as unprepared. The remaining four groups received mesio-oclusodistal cavity preparations and were restored with a hybrid composite (Filtek Z250), a packable composite (Filtek P60), an ormocer (Definite) and an amalgam (SDI Permite) with an amalgam bonding agent (Amalgam Bond Plus). All groups were stored in water at 37 degrees C for 15 days and thermocycled 1000 times between 5 degrees-55 degrees C. The specimens were preloaded five times in compression to 10 kg using two metal rods that contacted only the teeth on the cuspal inclines. The teeth were then loaded occlusally in an Instron Universal Testing Machine until fracture occurred. The means of force required to fracture the teeth in each of the five groups was analyzed using one-way ANOVA and Tukey Test. The difference between the mean cuspal fracture resistance of the unprepared control teeth and those restored with amalgam groups was found to be statistically significant (p < 0.05). No significant differences in resistance to cuspal fracture were found among the restoration groups, the unprepared control group and those teeth restored with hybrid composite, packable composite and ormocer groups (p > 0.05).

Research paper thumbnail of The Effect of Acid-Ething Time to the Bond Strength between the Composite Resin and Enamel

DergiPark (Istanbul University), Nov 2, 2014

Research paper thumbnail of Farklı iki ışık kaynağının akışkan restoratif materyallerin kenar sızıntıları üzerine etkisi

Hacettepe Dişhekimliği Fakültesi Derg.(. Clinical Dentistry and Research), 2007

Research paper thumbnail of Bond strength of a self-etching adhesive system to caries-affected dentin

PubMed, Apr 20, 2004

This in vitro study evaluated the microtensile bond strengths of sound versus caries-affected den... more This in vitro study evaluated the microtensile bond strengths of sound versus caries-affected dentin using a self-etching adhesive system, Clearfil SE Bond, with or without additional acid pre-conditioning. Extracted human mandibular molars with occlusal caries extending halfway through the dentin were used. In the first group, the teeth were bonded with the self-etching adhesive Clearfil SE Bond according to the manufacturer's instructions. In the second group, prepared dentin surfaces were etched with 37% phosphoric acid prior to applying the same self-etching adhesive. After the bonding procedure, all specimens were built up with composite resin and stored in water for 24 hours. The teeth were serially sectioned vertically into 0.7-mm slabs and trimmed into an hourglass shape for measuring microtensile bond strength. Each specimen was attached to a Bencor device and stressed in tension at a crosshead speed of 1 mm/minute. Statistical analysis was performed using two-way ANOVA and the Tukey HSD test (p<0.05). The microtensile bond strengths of Clearfil SE Bond to sound dentin (32.9) were significantly higher than to caries-affected dentin (15.9). In the second group where acid etching was performed prior to applying Clearfil SE Bond, there were no statistically significant differences between the microtensile bond strengths of sound (19.2) and caries-affected dentin (16.3). While bond strengths to sound dentin were decreased by using additional acid etching prior to applying Clearfil SE Bond, this procedure revealed no statistically significant differences in bond strengths for the caries-affected dentin.

Research paper thumbnail of A scanning electron microscopic study of different caries removal techniques on human dentin

PubMed, Jul 18, 2002

Scanning electron microscopy (SEM) evaluated the effect of different caries removal techniques on... more Scanning electron microscopy (SEM) evaluated the effect of different caries removal techniques on human dentin topography. Thirty-six extracted human carious mandibular molars were randomly assigned to six groups according to caries removal technique. Carious tissue was removed by hand excavation, bur excavation, air-abrasion, laser ablation, chemomechanical methods and sono-abrasion. The remaining dentin surfaces were replicated and gold-coated. The surfaces were examined using SEM and distinct differences in appearance were observed among specimens treated with different caries removal techniques. While hand-excavated, bur-excavated and air-abraded carious dentin surfaces were covered with a residual smear layer, sono-abrasion with patent dentinal tubules completely removed the smear layer. A few patent orifices of dentinal tubules were observed in dentin subjected to laser ablation and chemo-mechanical caries removal.

Research paper thumbnail of <i>In vitro</i> comparison of the efficacy of Carisolv<sup>TM</sup> and conventional rotary instrument in caries removal

Journal of Oral Rehabilitation, Nov 26, 2003

summary The purpose of this in vitro study was to compare the efficacy of a new chemomechanical ... more summary The purpose of this in vitro study was to compare the efficacy of a new chemomechanical caries removal agent, CarisolvTM (MediTeam AB, Sävedalen, Sweden), with conventional slow‐speed rotary instrument (bur). Fourteen extracted human molar teeth with deep dentine caries and no enamel coverage were selected for the study. Their laser fluorescence values were over 30 (DIAGNOdent®; KaVo, Biberach, Germany). After the teeth were sectioned through the centre of the carious lesion, one half was removed with conventional drilling (bur); the other half was removed with Carisolv gel. Removal of carious dentine was continued until the lesion was deemed caries‐free by visual and tactile criteria. The preparation time for each caries removal technique was also noted. The two halves of each tooth were fixed in 10% buffered‐formaldehyde for 1 week. They were then decalcified, dehydrated and embedded in paraffin blocks for histological studies. After taking serial sections of 5 μm thickness, sections were mounted on glass slides, deparaffinized, dehydrated and stained with toluidine blue for observation under a light microscope. Each section was examined for the presence of bacteria. Complete removal of caries was achieved in 13 (93%) of 14 conventionally prepared teeth, and 5 (36%) of 14 chemomechanically prepared teeth (P &lt; 0·05). Mean (±SD) time for caries removal was 272 s (±53·3) with Carisolv, and 116 s (±49·4) with drilling. The results of this study suggest that conventional rotary instrument (bur) was more effective than Carisolv in removal of carious tissue and also takes shorter time.

Research paper thumbnail of Çürüksüz Servikal Lezyonlara Self-Etch Adeziv Sistem Ile Uygulanan Farklı Yapıdaki Kompozit Rezin Restorasyonların 12 Aylık Klinik Değerlendirmesi

Gazi Üniversitesi Diş Hekimliği Fakültesi Dergisi, Nov 16, 2011

Research paper thumbnail of Clinical evaluation of a nanohybrid and a flowable resin composite in non-carious cervical lesions: 24-month results

Journal of Adhesive Dentistry, Aug 1, 2012

To evaluate the 24-month clinical performance of cervical restorations using a nanohybrid and a f... more To evaluate the 24-month clinical performance of cervical restorations using a nanohybrid and a flowable resin composite with a one-step self-etching adhesive. Twenty-one patients with at least one pair of non-carious cervical lesions participated in this study. A total of 134 non-carious cervical lesions were restored (67 with a nanohybrid resin composite, Grandio; 67 with a flowable resin composite, Grandio Flow) using a one-step self-etching adhesive system, Futura Bond NR, by one dentist. The restorations were evaluated for retention, color match, marginal discoloration, marginal adaptation, surface texture, anatomic form, and secondary caries by two calibrated examiners at baseline and after 6, 12, and 24 months using modified USPHS criteria. The survival rates of the restorations were calculated by the Kaplan-Meier estimator. The comparison of resin composites for each category was performed with the Pearson chi-square test, and the performance of restorations at baseline and after each recall time was evaluated using McNemar&amp;amp;amp;amp;amp;amp;amp;amp;#39;s test (p &amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.05). All patients attended the 24-month recall. The retention rates at 6 months were 66% and 58%, and 61% and 57% at 12 months for Grandio and Grandio Flow, respectively. At the 24-month recall, the retention rate was 60% for Grandio and 54% for Grandio Flow. No statistically significant differences were found in retention rates among the restorative materials in any evaluation period (p &amp;amp;amp;amp;amp;amp;amp;amp;gt; 0.05). For marginal discoloration and anatomical form, three Grandio and three Grandio Flow restorations showed Bravo scores at the end of 24 months. The restorations in both groups had Alfa ratings of 100% for the rest of the criteria evaluated. The nanohybrid and flowable resin composites showed similar clinical performances in the restoration of non-carious cervical lesions over 24 months.

Research paper thumbnail of Clinical evaluation of different adhesives used in the restoration of non-carious cervical lesions: 24-month results

Australian Dental Journal, Jan 31, 2013

Background: The aim of this study was to compare after 24 months the clinical performance of cerv... more Background: The aim of this study was to compare after 24 months the clinical performance of cervical restorations placed with the use of an etch-and-rinse and an all-in-one adhesive. Methods: Twenty-four patients with at least one pair of non-carious cervical lesions participated in this study. One hundred and twenty-three cervical lesions were restored (62 etch-and-rinse adhesive, Solobond M; 61 all-in-one adhesive, Futurabond NR). A nanohybrid resin composite, Grandio, was used as the restorative material. Restorations were evaluated according to modified USPHS criteria by two independent examiners. The survival rates of the restorations were calculated by the Kaplan-Meier estimator and log-rank test. The restorations in each category were compared using the Pearson chi-square test, while the performance of restorations at the baseline and at each recall time was evaluated by McNemar's test (p < 0.05). Results: The recall rate of patients was 100%. The retention rates were 82% and 75% at 6 months and 77% and 62% at 12 months for Solobond M and Futurabond NR, respectively. At the 24-month recall, the retention rate was 69% for Solobond M and 49% for Futurabond NR, and this difference was statistically significant (p < 0.05). No statistically significant difference was found for colour match, marginal staining, or marginal adaptation between the adhesives (p > 0.05). None of the restorations had secondary caries, loss of anatomical form, or surface texture changes. Conclusions: Cervical restorations placed with an etch-and-rinse adhesive showed higher retention than an all-in-one adhesive.

Research paper thumbnail of Three-year Clinical Evaluation of Different Restorative Resins in Class I Restorations

Operative Dentistry, Apr 1, 2014

The aim of the present study was to evaluate the three-year clinical performance of a nanofilled ... more The aim of the present study was to evaluate the three-year clinical performance of a nanofilled resin composite, a packable resin composite, and silorane-based resin restorations in Class I occlusal cavities. Twenty-eight patients with at least three similar-sized occlusal lesions in molar teeth participated in the study. A total of 84 Class I occlusal restorations were placed: 28 with nanofilled resin composite (Filtek Supreme), 28 with packable resin com

Research paper thumbnail of Cuspal Deflection in Premolar Teeth Restored Using Current Composite Resins With and Without Resin-modified Glass Ionomer Liner

Operative Dentistry, Apr 1, 2013

Using a recently introduced silorane-based composite resin, Filtek Silorane, and the placement of... more Using a recently introduced silorane-based composite resin, Filtek Silorane, and the placement of resin modified glass ionomer cement liner under the composite resin restorations resulted in reduced cuspal deflection. SUMMARY Aim: To evaluate the effects of four different types of composite resins and a resin modified glass ionomer cement (RMGIC) liner on the cuspal deflection of large MOD cavities in vitro. Materials & Methods: One hundred twenty-eight extracted human upper premolar teeth were used. After the teeth were divided into eight groups (n=16), standardized large MOD cavities were prepared. The distance between cusp tips was measured before and after the cavity preparations with a digital micrometer. Then the teeth were restored with different resin composites (Filtek Supreme XT,

Research paper thumbnail of Polymerization Shrinkage of Different Types of Composite Resins and Microleakage With and Without Liner in Class II Cavities

Operative Dentistry, Apr 1, 2014

The use of RMGIC liner with composite resin restorations reduces microleakage. The silorane-based... more The use of RMGIC liner with composite resin restorations reduces microleakage. The silorane-based composite showed lower volumetric polymerization shrinkage than methacrylate-based composites.

Research paper thumbnail of Farklı adeziv sistemlerle çürüksüz servikal lezyonlara uygulanan restorasyonların bir yıllık klinik değerlendirilmesi

Hacettepe Dişhekimliği Fakültesi Derg.(. Clinical Dentistry and Research), 2009

Research paper thumbnail of Effect of finishing and polishing procedures on surface roughness of tooth-colored materials

Quintessence International, Oct 1, 2009

Objectives: To evaluate the effect of 2 polishing systems on surface roughness of tooth-colored r... more Objectives: To evaluate the effect of 2 polishing systems on surface roughness of tooth-colored restorative materials. Method and materials: The materials included 3 flowable resins (Admira Flow, Voco; Dyract Flow, Dentsply; Filtek Flow, 3M ESPE) and a micro?hybrid composite resin (Filtek Z250, 3M ESPE). Eighteen specimens of each material were prepared using a Plexiglas well covered by a Mylar strip (10 mm in diameter and 2 mm in depth). The Ra (baseline) was measured with a Mitutoyo Surftest-402 Surface Roughness Tester (Mitutoyo) with a standard cut-off value of 0.8 mm. Five tracings at different locations on each specimen were made. The specimens were then randomly divided into two finishing and polishing groups (n = 9): (1) Sof-Lex Pop-on disks (3M ESPE), and (2) Astropol and Astrobrush system (Ivoclar Vivadent). After finishing and polishing, surface roughness of the specimens was remeasured. Data were analyzed using 1- and 2-way ANOVA, at P < .05. Results: The Mylar strip produced the smoothest surface in all restorative materials, while 2-way ANOVA demonstrated a significant difference for the finishing and polishing procedures (P = .000). The smoothest surface was generated with Sof-Lex Pop-on disks for all the materials tested. In procedure 2 (diamond bur/Astropol and Astrobrush system), Admira Flow group received the highest average surface roughness value, and a significant difference was revealed between Admira Flow and the other resins (P = .001). Conclusion: Sof-Lex Pop-on disks produced a smoother surface than Astropol and Astrobrush silicone polishers for microhybrid and flowable composites.

Research paper thumbnail of The effect of saliva contamination on microleakage of an etch-and-rinse and a self-etching adhesive

Journal of Adhesive Dentistry, Jun 1, 2007

Purpose: To evaluate the effect of saliva contamination on the microleakage of an etch-and-rinse ... more Purpose: To evaluate the effect of saliva contamination on the microleakage of an etch-and-rinse adhesive and a self-etching adhesive. Materials and methods: Class V cavity preparations at the cementoenamel junction were made on the buccal and lingual surfaces of 40 freshly extracted human molars. The teeth were randomly assigned into two groups for different adhesives: Group I, Single Bond (two-step etch-and-rinse adhesive) and Group II, Futura Bond NR (one-step self-etching adhesive). The adhesive materials were applied according to their manufacturers' recommendations. The specimens were then further subdivided into five subgroups (A-E; n = 8): group A, contamination before adhesive curing; group B, contamination before adhesive curing and re-application of adhesive; group C, contamination after adhesive curing; group D, contamination after adhesive curing and re-application of adhesive; and group E, no contamination (control). Contamination of adhesive surfaces was performed with fresh natural saliva and the saliva was removed by a gentle air blast. The specimens were restored with Z250 hybrid composite. After thermocycling (500x, 5 degrees C to 55 degrees C) and immersion in 0.5% basic fuchsin, the dye penetration was evaluated under a stereomicroscope. Statistical analysis was performed with the Kruskal-Wallis test at p < 0.05. Results: No statistically significant differences were found among the contamination subgroups on the enamel or on the dentin for either group (p > 0.05). There was no significant difference in leakage between Group I and Group II for any subgroup (p > 0.05). Conclusion: Contamination of adhesives with saliva before and after adhesive curing did not worsen the microleakage of the two-step etch-and-rinse adhesive Single Bond or the one-step self-etching adhesive Futura Bond NR.

Research paper thumbnail of Restorasyonların yenilenme nedenlerinin Hacettepe Üniversitesi Diş Hekimliği Fakültesi Diş Hastalıkları ve Tedavisi Anabilim Dalı öğrenci kliniğine başvuran hastalarda değerlendirilmesi

Hacettepe Dişhekimliği Fakültesi Derg.(. Clinical Dentistry and Research), 2009

Research paper thumbnail of Clinical Evaluation of a Silorane- and a Methacrylate-Based Resin Composite in Class II Restorations: 24-Month Results

Operative Dentistry, Jul 1, 2017

This clinical study found that both silorane-and methacrylate-based resin composite restorations ... more This clinical study found that both silorane-and methacrylate-based resin composite restorations showed clinically acceptable performance after 24 months in class II slot restorations. SUMMARY Objective: To compare the 24-month clinical performance of two different resin composites in class II slot restorations. Methods and Materials: Thirty-seven patients having at least two approximal carious lesions were enrolled in the study. A total of 116 teeth (58 pairs) were restored with either a siloranebased composite (Filtek Silorane) and its selfetch adhesive (Silorane Adhesive System, 3M ESPE) or a methacrylate-based packable resin composite (X-tra Fil) and its self-etch adhesive (Futurabond NR, VOCO GmbH) according to the toss of a coin. The restorations were evaluated at baseline and at six-, 12-, and 24month recalls by two calibrated examiners according to the modified US Public Health Service criteria. The comparison of the two restorative materials for each category was performed with the Pearson chi-square test. Within group differences of the materials at different recall times were compared using the Cochran Q and Friedman tests. Bonferroniadjusted McNemar test was used when significant difference was found (p,0.05). Results: After 24 months, no statistically significant differences were found between the two restorative materials for the criteria evaluated. Conclusions: Both silorane-and methacrylatebased resin composites showed clinically acceptable performance in class II slot restorations after 24 months.

Research paper thumbnail of Bond strength of one-step self-etch adhesives and their predecessors to ground versus unground enamel

European Journal of Dentistry, 2012

ABSTRACTObjectives: The aim of this study was to compare the shear bond strength of several self-... more ABSTRACTObjectives: The aim of this study was to compare the shear bond strength of several self-etch adhesives to their two-step predecessors to ground and unground enamel.Methods: Seventy-five extracted, non-carious human third molar teeth were selected for this study. The buccal surfaces of each tooth were mechanically ground to obtain flat enamel surfaces (ground enamel), while the lingual surfaces were left intact (unground enamel). The teeth were randomly divided into five groups according to the adhesive systems (n=15): one-step self-etch adhesive - Clearfil S3 Bond, its two-step predecessor - Clearfil SE Bond, one-step self-etch adhesive - AdheSE One, and its two-step predecessor - AdheSE, and a two-step etch-and-rinse adhesive - Adper Single Bond 2(control). After application of the adhesives to the buccal and lingual enamel surfaces of each tooth, a cylindrical capsule filled with a hybrid composite resin (TPH) was seated against the surfaces. The specimens were stored in ...

Research paper thumbnail of Clinical Follow-up of a Fissure Sealant Placed Using Different Adhesive Protocols: A 24-month Split-mouth Study

Operative Dentistry, Jul 1, 2018

The purpose of this study was to evaluate the retention rates of a fissure sealant placed using d... more The purpose of this study was to evaluate the retention rates of a fissure sealant placed using different adhesive protocols over 24 months. Twenty-four subjects with no restorations or caries received fissure sealants (Clinpro Sealant, 3M ESPE) placed using different adhesive protocols. A total of 292 sealants were placed as follows by two previously calibrated dentists using a table of random numbers (n=73): group I, acid-etch/without adhesive; group II, with a self-etch adhesive (Adper Easy Bond, 3M ESPE); group III, with an etch-andrinse adhesive (Adper Single Bond 2, 3M ESPE); group IV, with acid + self-etch adhesive (Adper Easy Bond). Two other calibrated examiners independently evaluated the sealants at baseline and at six-, 12-, 18-, and 24-month recalls. Each sealant was evaluated in terms of caries formation being present or absent and retention using the following criteria: 1 = total retention, 2 = partial loss, and 3 = total loss. Pearson's v 2 test was used to evaluate differences in retention rates among the sealants for each evaluation period. At the end of 24 months, total retention rates were 57.5%, 27.4%, 84.9%, and 76.7% in the acid-etch, selfetch adhesive, etch-and-rinse adhesive, and acid + self-etch adhesive groups, respectively. Although there were no statistically significant differences between the retention rates among the adhesive protocols at 6 months (p=0.684), significant differences were observed at the 12-, 18-, and 24-month evalua

Research paper thumbnail of İki̇ Farkli Poli̇saj Yöntemi̇ni̇n Posteri̇or Di̇şlerde Kullanilan Kompozi̇t Materyalleri̇ Üzeri̇ne Etki̇si̇-The Effect of Two Different Polishing Technique on Posterior Composite Materials

DergiPark (Istanbul University), Jun 5, 2013

Research paper thumbnail of Fracture resistance of teeth with Class II bonded amalgam and new tooth-colored restorations

PubMed, Oct 9, 2003

This study compared the cuspal fracture resistance of posterior teeth restored with four differen... more This study compared the cuspal fracture resistance of posterior teeth restored with four different adhesive restorations. Fifty sound, maxillary human premolars were randomly divided into a control group and four experimental groups with 10 teeth in each. Specimens in the first group were intact teeth that were tested as unprepared. The remaining four groups received mesio-oclusodistal cavity preparations and were restored with a hybrid composite (Filtek Z250), a packable composite (Filtek P60), an ormocer (Definite) and an amalgam (SDI Permite) with an amalgam bonding agent (Amalgam Bond Plus). All groups were stored in water at 37 degrees C for 15 days and thermocycled 1000 times between 5 degrees-55 degrees C. The specimens were preloaded five times in compression to 10 kg using two metal rods that contacted only the teeth on the cuspal inclines. The teeth were then loaded occlusally in an Instron Universal Testing Machine until fracture occurred. The means of force required to fracture the teeth in each of the five groups was analyzed using one-way ANOVA and Tukey Test. The difference between the mean cuspal fracture resistance of the unprepared control teeth and those restored with amalgam groups was found to be statistically significant (p < 0.05). No significant differences in resistance to cuspal fracture were found among the restoration groups, the unprepared control group and those teeth restored with hybrid composite, packable composite and ormocer groups (p > 0.05).

Research paper thumbnail of The Effect of Acid-Ething Time to the Bond Strength between the Composite Resin and Enamel

DergiPark (Istanbul University), Nov 2, 2014