Comparison of resin push-out strength to root dentin of bovine- and human-teeth

• Main Authors: Galhano Graziela, de Melo Renata, Valandro Luiz, Bottino Marco
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2009-01-01
• Series: Indian Journal of Dental Research
• Subjects: Bovine tooth; human-tooth; push-out test; root dentin
• Online Access: http://www.ijdr.in/article.asp?issn=0970-9290;year=2009;volume=20;issue=3;spage=332;epage=336;aulast=Galhano

<b>Aim</b> : 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. <b> Materials and Methods</b> : 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). <b> Results</b> : Statistically significant differences were found for the bond strength values between bovine- (4.1 &#177; 1.3 MPa) and human-root dentin (8.6 &#177; 5.7 MPa) (P =.0001). <b>Conclusion</b> : The push-out strengths of bovine- and human-root dentin were statistically different.