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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of Cusp Inclination and Type of Retention on Fracture Load of Implant-Supported Crowns

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Author(s):
Cibele Oliveira de Melo Rocha [1] ; Diogo Longhini [2] ; Rodrigo de Paula Pereira [3] ; João Neudenir Arioli Filho [4]
Total Authors: 4
Affiliation:
[1] Universidade Estadual Paulista - Brasil
[2] Universidade Estadual Paulista - Brasil
[3] Universidade Estadual Paulista - Brasil
[4] Universidade Estadual Paulista - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Brazilian Dental Journal; v. 28, n. 1, p. 92-96, 2017-02-00.
Abstract

Abstract There are few informations about the influence of cusp inclination on the fracture strength of implant-supported crowns. The study aimed to evaluate the influence of cusp inclination and retention type on fracture load in implant-supported metal-ceramic single crowns. Sixty crowns were made, classified as cemented and screw-retained with screw access hole (SAH) sealed or not. Standard (33°) and reduced (20°) cusp inclinations were tested for each group (n=10). To support crowns of a mandibular second molar, analogs of external hexagon implants 5.0 were used. The fracture load was measured in a universal testing machine EMIC DL2000 (10 kN load cell; 0.5 mm/min). Two-way ANOVA (retention and cusp inclination) followed by post hoc Tukey’s honest significant difference test was used for the statistical analyses (a=0.05). Crowns with reduced cusp inclination exhibited significantly higher fracture load (p<0.01) than crowns with standard cusp inclination. Cemented crowns showed significantly higher fracture load (p<0.01) than screw-retained crowns. The interaction among these factors was not significant (p>0.05) for the fracture load. The sealing of SAH did not influence the fracture load of screw-retained crowns (p>0.05). In conclusion, fracture load of implant-supported metal-ceramic crowns was influenced by retention and cusp inclination, and there was no influence of the sealing of SAH. (AU)

FAPESP's process: 13/01119-1 - Influence of cusp inclination on the resistance of screw-retained and cement-retained implant-supported metal-ceramic crowns
Grantee:Cibele Oliveira de Melo Rocha
Support Opportunities: Scholarships in Brazil - Master