Comparison of two systems for rigidly connecting 2.0-mm bone screws to an implantable device: In vitro stability testing

J.-P. van Loon*, L.G.M. de Bont, G.J. Verkerke

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

The stability of a screw-fixed implantable device can be improved by eliminating the freedom of movement between the screws and the device. Two systems have been developed for rigidly connecting 2.0-mm bone screws to an implantable device, and the aim of this study was to test and compare the stability of the two systems. In system A, a fixing disc locked the screw-head. In system B, the thread of the screw locked directly into the device. The stability of the connection was tested by measuring the resistance against a torque on the screw, against shear loading, against push-out loading, and against dynamic shear loading (70 N) for 5 million cycles. Both systems met the required minimum values for the resistance against a torque, shear loading and push-out loading, and dynamic shear loading did not cause movements between the screw and the device. We conclude that both systems are stable, but prefer system B because it is easier to make and implant than system A.

Original languageEnglish
Pages (from-to)200-204
Number of pages5
JournalBritish journal of oral and maxillofacial surgery
Volume38
Issue number3
DOIs
Publication statusPublished - Jun 2000
Externally publishedYes

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