Galhano, Grazielade Melo, Renata MarquesValandro, Luiz FelipeBottino, Marco Antonio2012-07-232012-07-232009-07Galhano Graziela, de Melo Renata Marques, Valandro Luiz Felipe, Bottino Marco Antonio. Comparison of resin push-out strength to root dentin of bovine- and human-teeth. Indian Journal of Dental Research. 2009 Jul-Sept; 20(3): 332-336.http://imsear.searo.who.int/handle/123456789/139743Aim : To compare the push-out strength of bovine- and human-root dentin and, thus, evaluate the suitability of bovine-root dentin to substitute human-root dentin for bond strength testing. Materials and Methods : Ten single-rooted human-teeth and ten bovine incisors were prepared using a #3 bur of a fiber post system (12 mm long). The posts were duplicated with resin cement (Duolink). The root canals were treated with All Bond 2 adhesive system and the resin posts were cemented using Duolink. The specimens were cut perpendicular to their long axis, yielding disc-specimens with 1.5 mm thickness, which were submitted to a push-out test (1 mm/min). Ten bond strength values per group (n = 10) were used for statistical analysis (Student t test, a =.05). Results : Statistically significant differences were found for the bond strength values between bovine- (4.1 ± 1.3 MPa) and human-root dentin (8.6 ± 5.7 MPa) (P =.0001). Conclusion : The push-out strengths of bovine- and human-root dentin were statistically different.enBovine toothhuman-toothpush-out testroot dentinAnimalsCattleDental Bonding --standardsDental Marginal Adaptation --standardsDental Restoration FailureDental Stress Analysis --methodsDentin --drug effectsDentin --ultrastructureDentin-Bonding Agents --standardsDisease Models, AnimalHumansPost and Core TechniqueReference StandardsResin Cements --standardsRoot Canal Preparation --methodsStatistics, NonparametricTooth Root --ultrastructureArticle