Effect of non-working occlusal contacts on vertical condyle position

Summary The presence of non‐working occlusal contacts is often considered harmful for the temporomandibular joint. Thus, the purpose of this study was to investigate the effect of non‐working occlusal contacts on the condylar position during submaximal and maximal clenching. The study comprised 22...

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Bibliographic Details
Published in:	Journal of oral rehabilitation Vol. 36; no. 6; pp. 435 - 441
Main Authors:	SEEDORF, H., WEITENDORF, H., SCHOLZ, A., KIRSCH, I., HEYDECKE, G.
Format:	Journal Article
Language:	English
Published:	Oxford, UK Blackwell Publishing Ltd 01-06-2009
Subjects:	Adult Bite Force canine protection Cuspid - physiology Dental Occlusion, Balanced Dentistry Electromyography Female Humans Male Mandibular Condyle - physiology Masseter Muscle - physiology Mastication - physiology Muscle Contraction - physiology non-working side contact occlusal guidance Temporomandibular Joint - physiology temporomandibular joint load
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Summary:	Summary The presence of non‐working occlusal contacts is often considered harmful for the temporomandibular joint. Thus, the purpose of this study was to investigate the effect of non‐working occlusal contacts on the condylar position during submaximal and maximal clenching. The study comprised 22 healthy subjects having a canine‐guided occlusion. None of them had a third molar and none of them had a missing tooth or showed tooth mobility. All subjects clenched on (i) the canine, (ii) the canine while a stiff bite registration material was positioned between the second premolar and the first molar on the non‐working side. The clenching level was controlled by surface electromyography of the masseter muscle. During clenching, the vertical and horizontal condylar position was predicted using six degrees of freedom ultrasonic motion analyser. Clenching on the canine caused a cranial movement of the non‐working side condyle. This movement was reduced by 0·6–0·9 mm when the subjects clenched while the artificial non‐working side contacts were in place. These results indicate that the contacts on the non‐working side may be able to prevent upward joint movement.
Bibliography:	ark:/67375/WNG-M82BXX1G-S ArticleID:JOOR1957 istex:2740448D3C68402EBC556809A6CA6117BA5FDF9B ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0305-182X 1365-2842
DOI:	10.1111/j.1365-2842.2009.01957.x