%0 Journal Article
%T Resistencia a la fractura de premolares tratados endod¨®nticamente, restaurados con dos sistemas de pernos y n¨²cleo
%A Ram¨ªrez
%A R. A
%A D¨¢vila
%A A.M
%A Rinc¨®n
%A Z.A
%A Bosetti
%A T
%J Acta Odontol¨®gica Venezolana
%D 2010
%I Scientific Electronic Library Online
%X objective: the purpose of this research was to compare the fracture resistance of human premolars restored with prefabricated fiber glass posts and custom cast post and to analyze the nature of the root fracture patterns. methods: 60 human monoradicular premolars were prepared with endodontic therapy and randomly assigned to one of two groups: group 1 (g1fv) recovered with prefabricated fiber glass posts (¨¢ngelus) or group 2 (g2c) with custom cast base alloy posts (orca /ventura extra) using resinous luting cement (nexus2/kerr). 2/3 of the crowns were restored with hybrid composite (glacier a1/sdi). the samples were loaded at a speed of 2mm/min and to a 30¡ã angulation with the longitudinal axis of the tooth in the universal testing machine (shimadzu ags- j).the fracture resistance was recorded and analyzed with one way anova. the nature of the root fracture patterns was determined through direct observation and rx; these data were analyzed with x2 and z test. results: after the anova analysis no statistically significant differences were observed in relation to fracture resistance between groups (p = 0,741). however, significant differences were found for the nature of the root fracture between the groups (zc=4, 47). conclusions: under the conditions of this study, both systems of posts have a similar fracture resistance. in relation to root fracture patterns, there are less catastrophic fractures in the g1fv when compared to g2c
%K fracture resistance
%K endodontically treated teeth
%K prefabricated fiber glass posts
%K custom cast post
%K root fracture patterns.
%U http://www.scielo.org.ve/scielo.php?script=sci_abstract&pid=S0001-63652010000100005&lng=en&nrm=iso&tlng=en