title: Effect of repeated firings on microtensile bond strength of In-Ceram Alumina with two different veneering ceramics.
abstract: Microtensile bond strengths of In-Ceram Alumina cores veneered with two ceramics after different numbers of firing cycles were evaluated. After In-Ceram Alumina cores were fabricated, they were veneered with either Vitadur Alpha or Vita VM7. A control group of each core-veneer combination was fired twice, and a second group was fired five times to induce thermal fatigue. Obtained microbars were subjected to microtensile bond strength tests. Data were analyzed using two-way analysis of variance. Microtensile bond strength values for Vita VM7 specimens were higher than those for Vitadur Alpha (P < .001). Although the number of firing cycles revealed no change in bond strength, the veneering material proved to be an important factor.
authors.affiliation: Hacettepe University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey.
authors.forename: Atila
authors.initials: A
authors.lastname: Ertan
authors.forename: Bulem
authors.initials: B
authors.lastname: Yuzugullu
authors.forename: Senay
authors.initials: S
authors.lastname: Canay
authors.forename: Bahadir
authors.initials: B
authors.lastname: Ersu
mesh_terms: D000537:Aluminum Oxide; D002516:Ceramics; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003801:Dental Veneers; D006358:Hot Temperature; D013718:Tensile Strength
chemical_list: C556625:VITA VM7; C483027:vitadur alpha; D003776:Dental Porcelain; D000537:Aluminum Oxide