Emrullah Bahsi

Comparative Evaluation of the Effects of Ozone, Diode Laser, and Traditional Cavity Disinfectants on Microleakage

Aim: This study aimed to evaluate the effects on microleakage of the application of ozone gas, laser and traditional cavity disinfection under in vitro conditions. Material and Methods: Ninety third-molar teeth extracted for various reasons were used in this study. All the teeth were prepared with a standard V cavity on the buccal surface. Then the teeth were randomly allocated to one of 6 groups of 15 teeth; Group 1 benzalkonium chloride, Group 2 chlorhexidine gluconate, Group 3 sodium hypochloride, Group 4 diode laser, Group 5 ozone gas, Group 6 control group- no disinfection was applied. Primer was applied to the cavities, then bond and 10-s polymerization. Clearfil AP-X was used in the cavities as a hybrid composite and polymerized for 20 s. The samples then underwent 1000 thermal cycles of 30-s application, in baths at temperatures between 5 ± 2 °C and 55 ± 2 °C. All the samples were stirred in 0.5% basic phuxine solution and the sections taken under stereomicroscope were examined and photographed at 15 × magnification. SEM analysis was made and the obtained results were statistically evaluated with the Kruskal–Wallis test. Results: No significant difference was seen between the groups in respect of the microleakage values of both the occlusal and gingival edges (p < 0.05). Comparison of the microleakage values of the occlusal and gingival edges of the groups determined the least leakage to be in the ozone group (p < 0.05). Conclusion: No statistical significance was determined between the groups. However, the mean least microleakage was found in the ozone group and the highest amount in the control group.

Effect of 1% chlorhexidine gel on the bonding strength to dentin

Background/Purpose The purpose of this in vitro study was to evaluate the effect of 1% chlorhexidine (CHX) gel on dentin bond strengths of posterior composite resin applied with two different adhesive systems. Material and methods In total, 75 extracted, caries-free human molars were used. The occlusal surface of each tooth was ground to create a flat dentin surface. Then, each tooth was mounted in acrylic. The dentin specimens were randomly assigned to five groups of 15 specimens each. In Group 1, Prime & Bond NT (PBNT) was applied; in Group 2, a 1% CHX gel + etching for 15 s + PBNT were applied; in Group 3, etching + 1% CHX gel + PBNT were applied; in Group 4, Clearfil S 3 Bond was applied; and in Group 5, 1% CHX gel + Clearfil S 3 Bond were applied. A dentine bonding system was applied to dentin surfaces, and composite cylinders were built up using a special device and then light-polymerized. Specimens were mounted and sheared using an Instron universal testing machine at a cross-head speed of 0.5 mm/min. Results: The results were recorded in megapascals. The sheared specimens were examined under a light microscope, and the type of failure (adhesive, cohesive or mixed) was recorded. Data were compared by one-way analysis of variance and Tukeys honestly significant difference tests. Means were 16.4 ± 4.1 MPa in Group 1, 16.2 ± 3.9 MPa in Group 2, 13.0 ± 4.5 MPa in Group 3, 11.9 ± 2.7 MPa in Group 4, and 11.5 ± 2.7 MPa in Group 5. The use of 1% CHX gel before acid etching was significantly higher than after etching on the shear bond strength of PBNT (P 0.05). Conclusion Within the limitations of the present in vitro study, it was concluded that 1% CHX gel application did not adversely affect the shear bond strengths of dentin-bonding agents.

A Comparison of Microleakage Scores of Five Different Types of Composite Resins

ABSTRACT This study aimed to perform a comparative assessment of microleakage in Class V cavities among five different composite resins. For this purpose 100 fresh caries-free human permanent molars were randomly assigned to one of five groups (n=20). Clearfil Majesty Esthetic + Clearfil S3 Bond (Group I), TPH Spectrum + Xeno V (Group II), Gradia Direct Anterior + G Bond (GC) (Group III), Premise + Optibond All in One (Group IV) and Charisma + iBond (Group V) were applied and polymerized under LED. Specimens were varnished, immersed in 0.5% methylene and sectioned bucco-palatinally/lingually, and microleakage scores were determined. Gingival and occlusal microleakage scores among groups were statistically significant (p<0.05) (p=0.043, p=0.005). Occlusal microleakage scores for Clearfil Majesty Esthetic and Premise were lower than in the other groups. Charisma had the highest microleakage scores, with no difference among the other groups (p>0.05). In conclusion occlusal and gingival microleakage scores were satisfactory except for Charisma.

Treatment of an amelogenesis imperfecta with restorations prepared using a modified clear matrix technique

The rehabilitation of a patient with amelogenesis imperfecta (AI) from both functional and esthetic standpoints represents a challenge. A number of treatment options have been proposed. Recently, the use of adhesive restorations has gained popularity because of the improved physical properties of these materials. This article describes a treatment with direct resin composite for the restoration of teeth affected by the hypomature type of AI. A modified clear matrix technique was used during the preparation and restoration process. The use of the technique provides clinicians with reduced chair time, and the matrix can be repeated when needed; restorations can be performed relatively quickly with a minimal post-operative finishing process. This article highlights the use of direct-bonded resin composites providing satisfactory esthetics and function in restoring AI-affected teeth.

DO OZONE AND BORIC ACID EFFECT MICROLEAKAGE IN CLASS V COMPOSITE RESTORATIONS

ABSTRACT The aim of this in vitro study was to evaluate the effects of chlorhexidine gluconate (2%), sodium hypochloride (2.5%), ozone gas, and boric acid at different concentrations (1%, 3%, 5%, and 7%) on microleakage from composite restorations. In a total of 80 extracted human canine teeth, a class V cavity was opened on the buccal surface and the samples were separated into eight groups. In the control group, no procedure was applied for cavity disinfection, then composite restoration (Z250, 3M) was made using single-stage, self-etch adhesive (Single Bond 3M). In the other groups, seven different disinfectants were used, then the cavity was restored. The teeth were split into two in the buccolingual direction, parallel to the long axes. Stain penetration was examined under stereomicroscope and scored. Examination with SEM was made on one sample from each group, selected at random. Statistical evaluations were made using Dunnett C Post Hoc Comparison and Kruskal–Wallis H tests. In the occlusal region evaluation, the groups with the lowest level of leakage were the 3% and 5% boric acid groups, and the highest levels of microleakage were determined in the chlorhexidine group and the 1% boric acid group. In the gingival region, the lowest level of microleakage was in the 5% boric acid group and the highest levels were determined in the 1% and 7% boric acid groups. Boric acid disinfectants used at suitable concentrations were not seen to create a risk in respect of microleakage.

Effect of the different finishing and polishing procedures on the surface roughness of three different posterior composite resins

Finishing and polishing techniques have great importance on the long term success and aesthetics of the composite restorations. In this study it was aimed to examine the effect of three different posterior composites on surface texture with various finishing and polishing procedures. Three different posterior composites, Filtek P60, Clearfil Majesty Posterior and Cavex Quadent Posterior Dense, and three different finishing and polishing procedures diamond finishing burs, tungsten carbide burs and Sof-Lex discs were used in the study. The specimens were 5 mm in diameter and 2 mm in height. The surface roughness was measured at three seperate points with a profilometer device and the Ra values were recorded. A one-way analysis of variance (ANOVA) and Kruskal-Wallis variance analysis was applied for statistical analysis and p < 0.05 was accepted significant. No statistically significant differences were found between the composite resins with respect to surface roughness (p > 0.05). A statistically significant difference was found between the groups of diamond, carbide, and Sof-Lex groups (p < 0.05). Sof-Lex polishing system was more successful than the diamond and carbide burs in the finishing and polishing procedures of composites. SCANNING 38:448-454, 2016.

Effect of Different Restorative Materials on Microleakage of Ozone Gas and Traditional Cavity Disinfectant Applied Teeth

ABSTRACT The aim of this in vitro study is to investigate the effects of ozone and conventional cavity disinfectant on microleakage at the cavities which are restorated with different restorative materials. Ninety human molar teeth were used in this study. Black V cavities are prepared on buccal surfaces of teeth. Teeth are divided to 3 groups which contains 30 teeth. Group 1: ozone applied; Group 2: 2% chlorhexidine applied; Group 3: any disinfectant is not applied. And then all groups are divided to three subgroups. All subgroups are restored with silorane, ormocer, and traditional composite according to the manufacturer’s directions. Sections were examined under a microscope. Occlusal and gingival microleakage values by a separate researcher and scores were recorded. Statistically results were reviewed with ANOVA and Kruskal–Wallis Tests. Statistically significant difference of microleakage between cavity disinfectant and control groups’ occlusal and gingival lines was not found (p > 0.05). There was no differences at occlusal lines of composite subgroups (p > 0.05) but also significant difference at gingival lines was found (p < 0.05). Statistically significant difference was found among the composite materials, between chlorhexidine and control groups’ gingival lines. The most successful results at gingival lines were found with silorane.

Excellent Aesthetics with Vital Bleaching and Porcelain Laminates Cooperation: A Case Report with 2 Years Follow Up

Objective: Dental bleaching offers a conservative, simplified, and low cost approach to change the color of discolored teeth. The aim of this study is to present the restoration made with porcelain laminate veneers after vital bleaching.

The Effect of Ozone Gas on Dentin Shear Bond Strength

Introduction The basic aim in the prevention of dental decay is to reduce the factors creating decay and to increase the protective approaches [1]. Complete elimination cannot be provided of the pathogen bacteria in the dentin to remove the decay lesion. When minimally invasive cavity design is planned to prevent excessive substance loss, this problem becomes more important. Bacteria remaining in the dentin tissue under a restoration may cause secondary decay and pulpal inflammation [2]. After physical removal of the decay lesion, the elimination of bacteria and bacterial by-products is necessary [2,3]. In previous studies, cavity disinfectants, antibacterial restorative materials, laser, light-activated disinfection systems and ozone have been used for this purpose [3].

A comparison of the levels of microleakage of five adhesive systems

Objective: The aim of this study was a comparative assessment of in vitro microleakage of five different new generation self-etching adhesive systems. Materials and Methods: One hundred recently extracted fresh caries-free human permanent molars were used. Teeth were randomly assigned to one of five groups (n = 20). Clearfil S 3 Bond (Group I), Xeno V (Group II), G Bond (guanine-cytosine) (Group III), Optibond All in One (Group IV) and iBond (Group V) were applied, then polymerized with light emitting diode and restored with a nanofill composite. Teeth were coated twice with acid resistant varnish and immersed in 0.5% methylene blue. Specimens were cut bucco-palatinally/lingually, with microleakage scores evaluated on a scale from 0 to 4 under a stereomicroscope and then analyzed under a scanning electron microscope. Results: The differences among the gingival and occlusal microleakage scores of the groups were statistically significant (P < 0.05) (P = 0.043, P = 0.005). Occlusal microleakage scores of Clearfil S 3 Bond and Optibond All in One were considerably lower than those of the other three groups. While the highest microleakage was observed with iBond, there was no statistical difference between the Xeno V and G Bond groups (P > 0.05). The highest gingival microleakage scores were in the iBond group; though, statistically there was no significant difference among the other groups (P > 0.05). Conclusion: The occlusal and gingival microleakage scores of self-etching adhesive systems in this study were satisfactory except for one group (Group V-iBond).