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The International Journal of Oral & Maxillofacial Implants
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Int J Oral Maxillofac Implants 10 (1995), No. 3     1. May 1995
Int J Oral Maxillofac Implants 10 (1995), No. 3  (01.05.1995)

Page 326-334


Bending Overload and Implant Fracture: A Retrospective Clinical Analysis
Rangert, Bo / Krogh, Paul H. J. / Langer, Burton / van Roekel, Ned
Thirty-nine patients with implant fractures treated by three of the authors have been analyzed as to probable causes. Thirty-five (90%) of the fractures occurred in the posterior region. Thirty (77%) of the prostheses were supported by one or two implants, which were exposed to a combination of cantilever load magnification and bruxism or heavy occlusal forces. It was concluded that prostheses supported by one or two implants and replacing missing posterior teeth are subjected to an increased risk of bending overload. The literature review indicates that the fracture frequency is low in these situations and this study demonstrates that with appropriate treatment planning, such overload situations can essentially be prevented.

Keywords: bending overload, bone resorption, implant fracture, mechanical problems, osseointegrated implant