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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

Publication:
March 2013
Volume 44 , Issue 3

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Screw loading and gap formation in implantsupported fixed restorations: Procera implant bridge vs. conventionally cast screw-retained restorations

Winter, Werner / Karl, Matthias

Pages: 263-266
DOI: 10.3290/j.qi.a29051

Objectives: It was the purpose of this finite element analysis to compare the implant-restoration connection created by Procera Implant Bridge (PIB) and conventional screw-retained prostheses with respect to screw loading and gap formation.
Method and Materials: Finite element models representing a conventional screw-retained restoration and a PIB were set up. A horizontal load of 200N was applied on the restorations while resulting gap formation and screw loading was recorded.
Results: Increasing the preload of the retaining screws led to a decrease in gap formation. Smaller gaps were observed in the conventional restorations. Loading of the screws was of comparable magnitudes in both cases.
Conclusion: The use of screw-retained implant-supported restorations representing butt-joint connections at the restorative interface may result in increased gap formation.

Keywords: gap formation, implant-abutment interface, Procera Implant Bridge, screw joint stability

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