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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 10 (1995), No. 1     1. Jan. 1995
Int J Oral Maxillofac Implants 10 (1995), No. 1  (01.01.1995)

Page 99-108

In Vivo Vertical Forces on Implants
Richter, Ernst-Jürgen / Dent, Priv-Doz Dr Med / Dipl-Ing
Vertical forces applied to dental implants during oral functions have not been quantified precisely. The key problem has been the lack of suitable measuring devices. This article introduces a new technique for placing a transducer directly in the implant without any increase in vertical dimension. Results were compared to loads applied to teeth. Implants in the molar position that were fixed to a premolar with a prosthesis withstood maximum vertical forces of 60 to 120 N during chewing. Single molars and premolars carried maximum vertical forces of 120 to 150 N. Clenching in centric occlusion caused a load level of approximately 50 N for both natural and artificial abutments. Occlusal prematurities on the implant restoration that were less than 200 µm in height showed no significant increase of the implant load level.

Keywords: bending moments, chewing forces, clenching, implant loading, interface, measuring device, occlusion, prematurities