Shear bond strength assessment of vita enamic ceramics bonded to enamel and dentin using bifix QM resin-based cement versus rely X ultimate : In-vitro study / Dina Ahmed Abdellatif Ibrahim ; Supervised Lamiaa Sayed Kheirallah , Maha Ahmed Taymour

Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics

Reaching the patient satisfaction through superior esthetic is one of our main aims as dental practitioners. Technology development of the ceramic materials together with the adhesive cements results in conservative restorations with superior bond values. The purpose of the current study was to evaluate the shear bond strength of Vita Enamic blocks to enamel and dentine substrate utilizing bifix QM resin cement versus the rely X ultimate clicker.Twenty eight freshly extracted human premolars teeth free of decay or fracture were selected for this study. The enamel samples were prepared by flattening enamel only from the buccal surface of each tooth. The dentin samples were prepared by flattening of the buccal surface of each tooth till dentin surface was exposed. For shear bond strength testing, the teeth were divided into two main groups according to the resin cement used: Group (A): 14 disc samples cemented with Bifix QM resin cement Group (B): 14 disc samples cemented with rely X ultimate clicker. Each group was further subdivided into two subgroups according to the type of the dental substrate utilized for bonding; either enamel or dentin. Subgroup (1): includes 7discs samples bonded to enamel. Subgroup (2): includes 7discs samples bonded to dentin. Following cementation of all samples, all specimens were stored in distilled water for 24h at 37{u2103}, and then they were exposed to aging thermocycling 500 cycles, ±5{u00B0}C/55{u00B0}C

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