Effect of Different Repair Systems on Bond Strength Between Resin-Based CAD/CAM Blocks and Composite Resin

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Çetin N., Kozan M., Barutçugil Ç.

Restoratif Dişhekimliği Derneği 23.Uluslararası Bilimsel Kongresi, Antalya, Türkiye, 6 - 08 Aralık 2019, ss.47

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.47
  • Akdeniz Üniversitesi Adresli: Evet

Özet

AIM: The aim of this study was to evaluate the impact of surface treatments and repair materials on shear bond strength and to measure fracture resistance between CAD/CAM restoration and resin composites. MATERIALS & METHODS: Two different resin-based CAD/CAM blocks (Lava Ultimate,3M ESPE;LU and Vita Enamic,Vita;VE) were used in this study. Using low-speed diamond saw, 120 samples were prepared in size of 5x5x5 mm for each product. All specimens were placed in acrylic using cylindrical molds and their one surfaces were exposed. The surfaces were prepared by using 600 grit silicon carbide paper. The specimens of each CAD/CAM restorative material were randomly divided into five subgroups (n=12) according to repair systems as follows; (1) %37 orthophosphoric acid, (2) %9,5 hydrofluoric acid ,(3) G-Multi Primer (GC), (4)Bisco repair kit and (5) Cojet system (3M ESPE) . After surface repair treatment procedures, composite resin (Charisma Smart,Kulzer) was placed on the specimen surface in two increment of 2 mm using silicon cylindrical molds in size of approximately 3,5 x 4 mm. After composite resin build-up, all specimens were stored in distilled water at 37°C for 24 h. A shear bond strength test was performed using a universal testing machine (0.5 mm/min). The shear bond strength data were analyzed with 1-way ANOVA, followed by the Tukey post hoc test (p<0.05). RESULTS: The highest shear bond strength values between resin-based CAD/CAM blocks and resin composites were found in GC Multiprimer applied group for each CAD/CAM restoratives. (p<0,05). Also, it was found that lowest bond strength values were obtained in the phosphoric acid group (10,15 MPa) for Lava Ultimate (11,81 MPa) as well as hydrofluoric acid pretreatment for Vita Enamic. Conclusıon: Within the limitations of present study, it can be concluded that GC Multiprimer may be best alternative repair method for resin-based CAD/CAM blocks. Keywords: Bond strength, CAD/CAM blocks, composite resin, repair