Browsing by Author "Akdeniz, Mehmet Serif"

Now showing 1 - 3 of 3

Effects of Desensitizers, Temporary Cements, and Dentin Cleaning Methods on the Bond Strength of Self-etch/Adhesive Resin Cements To Dentin: an in Vitro Study
(Sage Publications india Pvt Ltd, 2022) Ugur, Mehmet; Kavut, Idris; Kulunk, Safak; Akdeniz, Mehmet Serif; Tanrikut, Ozgur Ozan
Aim: The aim of this study was to evaluate the effect of desensitizer, temporary cements, dentin cleaning methods on shear bond strength (SBS) of self-etch and self-adhesive resin cements to dentin. Materials and Methods: Four hundred eighty buccal or lingual/palatine coronal portions of human molar teeth were mounted in the acrylic blocks. Teeth surfaces were prepared until the dentin was exposed. Specimens were divided into four groups. One group separated as control and three groups of teeth were treated with a desensitizing agent containing calcium-phosphate desensitizer (Teethmate Desensitizer, TMD), resin-based self-reinforcing monomer (Shield Force Plus, SFP) and 2-hydroxyethyl methacrylate and glutaraldehyde (Gluma Desensitizer). Two different temporary cement containing calcium hydroxide (Dycall) and zinc oxide based (Rely X Temp NE) temporary cement were applied to the dentin surfaces. Temporary cement was removed with one of three cleansing techniques: 2% chlorhexidine digluconate and glass particles containing agent (Consepsis Scrub), cleansing bur (OptiClean), and intra/extracoronal rotary brush (Starbrush). All groups were further divided into two cementation subgroups (Panavia V5 and Panavia SA). The SBS (MPa) was measured using a universal testing machine at 0.5 mm/min crosshead speed. The data were analyzed statistically with a four-way analysis of variance and Tukey's Honest Significant Difference test (alpha = 0.05). Results: Although SFP showed higher SBS, there was no statistically significant difference between other groups (P > .05). There were no significant differences between temporary cements (P > .05). OptiClean rotary bur showed higher mean SBS values in all groups. The dual-polymerized Panavia V5 showed the highest SBS values in all groups (P < .05). Conclusion: Cleaning of dentin surface from temporary cement remnants with a silicon bur and dual-cure resin cement showed the highest bond strength values.
Evaluation of Color Changes of Different Resin Cements in Feldspathic Ceramic Crowns After Accelerated Aging: an in Vitro Research
(Sage Publications india Pvt Ltd, 2022) Eskitascioglu, Murat; Akdeniz, Mehmet Serif; Degirmenci, Beyza Unalan
Aims: To evaluate the color changes that occur after accelerated aging in feldspathic ceramic crowns cemented with three different dual-cured resin cements. Materials and Methods: For each of the A2-colored RelyX U200, G-CEM LinkForce, and Panavia V5 cement groups, 45 dies from A2-colored zirconia blocks and 45 crowns from CEREC blocks were prepared. Color measurements after 24 h of cementation (T1) and after cycles of aging of 1750 (T2), 3500 (T3), and 7000 (T4) in the thermal cycle device were made using SpectroShade Micro device. The coordinates of the color were used L*, a*, and b* as base and the color change was calculated with Delta E-00 in determining the color. One-way analysis of variance test was used to compare the times in terms of Delta L*, Delta a*, and Delta b* values. Results: It was found that Delta L* value decreased significantly in period of the T2, T3, and T4 times compared to T1 in all groups (P<.05), whereas the change between period of T2, T3, and T4 times was not significant (P>.05). The Delta a* value increased significantly in the period of T3 and T4 times compared to T1 in the only G-CEM LinkForce group, whereas the Delta b* value increased significantly in the period of T4 time compared to T1 in the only Panavia V5 group. The changes in Delta E-00 values, which were observed in all period of times, were found to be between 0.43 and 1.04, 0.43 and 1.43, and 0.40 and 0.97 in RelyX U200, G-CEM LinkForce, and Panavia V5 groups, respectively. Conclusion: After accelerated aging, it was found that the color of all cements became darker and the G-CEM LinkForce group turned red and the Panavia V5 group turned yellow. However, it was found that the color changes that occurred were within clinically acceptable visible levels.
Evaluation the Effects of Low-Level Laser Therapy on Disc Displacement With Reduction
(Baycinar Medical Publ-baycinar Tibbi Yayincilik, 2020) Tunc, Serap Keskin; Degirmenci, Beyza Unalan; Yayli, Nazli Alpaslan; Aslan, Senol; Akdeniz, Mehmet Serif
Objectives: This study aims to evaluate the effects of additional low-level laser therapy (940 nm GaAIAs) to the routine occlusal splint therapy on maximal mouth opening (MMO), visual analog scale (VAS) scores, and passive mouth opening (PMO). Patients and methods: Between January 2016 and March 2018, a total of 40 patients (10 males, 30 females; mean age 22.35 years; range, 18 to 60 years) with disc displacement with reduction of the temporomandibular joint were included. The patients were divided into two groups. Group 1 (control group, n=20) received routine non-steroidal anti-inflammatory drug (NSAID) therapy and occlusal splint therapy for eight hours per day for a total of three months. Group 2 (laser group, n-20) received NSAID, occlusal splint therapy and 940 nm wavelength diode laser therapy for two sessions per week for a total of four weeks. The MMO, PMO, and VAS scores were recorded before and at one, two, three, four, and 12 weeks after treatment. The joint and muscle examinations were performed. Results: A constant decrease was found in the VAS scores in both groups. At four (p=0.008) and 12 weeks (p-0.003), a statistically significant difference in the VAS scores was observed. At all time points, PMO and MMO scores increased in both groups. The MMO scores were statistically higher in the laser group at all time points (p<0.005). Conclusion: Our study results suggest that short-term low-level laser therapy additional to conventional treatment may yield satisfactory outcomes.