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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-11371

Gallo, L M; Gössi, D B; Colombo, V; Palla, S (2008). Relationship between kinematic center and TMJ anatomy and function. Journal of Dental Research, 87(8):726-730.

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Abstract

The kinematic center (KC)-defined by coinciding jaw-opening/-closing and protrusion-retrusion trajectories-has been proposed in the literature as a reference point to represent TMJ movements. In this study, we tested whether the KC lies in a peculiar anatomical point and whether its trajectory reflects intra-articular distance. In 11 asymptomatic individuals (seven females, four males, aged 24-37 yrs), 4 openings/closings and 4 protrusions/retrusions were tracked with dynamic stereometry. In a 3D lattice (0.5 mm grid) constructed solidly around each condyle, the KC was the point with maximal cross-correlation between opening-closing and protrusion-retrusion paths. KC trajectories were more cranial on closing than on opening, consistent with intra-articular distances being smaller on closing than on opening. However, KCs were never located on condylar main axes (distance, 4.5 +/- 2.9 mm), nor did they coincide with points best approximating fossa shapes (distance, 12.5 +/- 6.4 mm). The kinematic center's anatomical and functional significance therefore appears to be questionable.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Masticatory Disorders and Complete Dentures, Geriatric and Special Care Dentistry
DDC:610 Medicine & health
Language:English
Date:2008
Deposited On:23 Jan 2009 16:51
Last Modified:23 Nov 2012 13:17
Publisher:Sage Publications
ISSN:0022-0345
Publisher DOI:10.1177/154405910808700810
PubMed ID:18650542

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