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ORIGINAL RESEARCH Table of Contents   
Year : 2009  |  Volume : 20  |  Issue : 3  |  Page : 332-336
Comparison of resin push-out strength to root dentin of bovine- and human-teeth


1 São José dos Campos Dental School, São Paulo State University, Brazil
2 Division of Prosthodontics, Department of Restorative Dentistry, Federal University of Santa Maria, Brazil
3 Department of Dental Materials and Prosthodontics, São Paulo State University at São José dos Campos, Brazil

Correspondence Address:
Luiz Felipe Valandro
Division of Prosthodontics, Department of Restorative Dentistry, Federal University of Santa Maria
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-9290.57378

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Aim : 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.


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