Original Research Article
Year: 2017 | Month: May | Volume: 7 | Issue: 5 | Pages: 105-115
Evaluation of Micro-Tensile Bond Strength of Indirect Resin Composite Inlay to Dentin
Nashaat Magdy1, Ahmad Rabah2
1Assistant Professor of Conservative Dental Science, 2Lecturer of Prosthodontic,
College of Dentistry, Prince Sattam Bin Abdulaziz University, KSA
Corresponding Author: Ahmad Rabah
ABSTRACT
Objective: To evaluate micro-tensile bond strength (μTBS) of indirect resin composite inlay to dentin after specimen's storage in distilled water and lactic acid.
Materials and Methods: Standardized MOD Class II cavities were prepared in 96 intact human molars and restored with SR Nexco resin composite inlay restorations. The specimens for each test (n=48) were assigned into three sets (n=16) according to the luting resin cement used (etch-and-rinse (Variolink N), self-etch (Panavia F2.0) and self-adhesive (RelyX Unicem)). Each set was subdivided into two equal subsets (n=8) relative to the storage media either distilled water or lactic acid. Half of the specimens of each subset were stored in each storage medium for 24h while the other half was stored for 168h (7 days).
Results: The outcome of μTBS to dentin evaluation showed that, SE Panavia F2.0 stored in distilled water for 24h revealed the highest values. Etch & rinse Variolink N stored in lactic acid for 168h showed the lowest values.
Conclusion: μTBS showed good results with SE resin cement strategy.
Key words: Micro-tensile bond strength (μTBS), indirect resin composite, resin cement