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Movements of the Mandibular Condyle Kinematic Center during Jaw Opening and Closing
M. Yatabe
First Department of Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University, Japan
A. Zwijnenburg
Department of Oral Kinesiology, Academic Center Dentistry Amsterdam, Louwesweg 1, 1066 EA Amsterdam, The Netherlands
C.C.E.J. Megens
Department of Oral Kinesiology, Academic Center Dentistry Amsterdam, Louwesweg 1, 1066 EA Amsterdam, The Netherlands
M. Naeije
Department of Oral Kinesiology, Academic Center Dentistry Amsterdam, Louwesweg 1, 1066 EA Amsterdam, The Netherlands
Little is known about the detailed kinematics of the human temporomandibular condyle during jaw opening and closing. According to the rotate and swing model by Osborn (1989), the condyle is kept in close contact with the articular eminence during opening. Whether the condyle is in closer contact with the articular eminence during opening than during closing is unknown. Another consequence of the model is that the opening condylar movements are less variable than the closing movements. In this study, the hypothesis that the opening condylar path is closer to the articular eminence and also less variable than the closing condylar path is tested. Twenty subjects (10 males and 10 females with a mean age of 22) without signs or symptoms of a craniomandibular disorder performed 2 series of 4 protrusive movements and 2 series of 4 empty opening-closing movements. The movements were recorded by a six-degrees-of-freedom opto-electronic jaw movement recording system (OKAS-3D). The kinematic center of the condyle was used as a reference point for the reconstruction of condylar movement paths. Characteristics of the opening and closing paths were investigated by means of a displacement index (DI). This index is the quotient between the three-dimensional path length and the three-dimensional path distance between the start and the end point of an opening or closing movement of the kinematic center. The DI was smaller (p < 0.0001) and also less variable (p < 0.0001) during opening than during closing. The smaller DI value, in combination with the concave nature of the movement path, indicates that the opening path of the kinematic center lies above the closing path and thus closer to the articular eminence.
Key Words: condylar movements • kinematic center • 3-D.
REFERENCES
- Baragar FA, Osborn JW (1984). A model relating patterns of human jaw movement to biomechanical constraints. J Biomechan 17:757-767.[Medline]
[Order article via Infotrieve]
- Bezuur JN, Hansson TL, Wilkinson TM (1989). The recognition of craniomandibular disorders-an evaluation of the most reliable signs and symptoms when screening for CMD. J Oral Rehabil 166:367-372.
- Kohno S. (1972). Analyse der Kondylenbewegung in der Sagittalebene (Analysis of condyle movements in the sagittal plane). Dtsch Zahnärztl Z 27:739-743.[Medline]
[Order article via Infotrieve]
- Kohno S., Bando E., Tanaka B., Kuriyama M., Tabata T. (1980). Mandibular movement and mandibular position in man. In: Jaw position and jaw movement. Kubota K, Nakamura Y, Schumacher G-H, editors. Berlin: Veb Verlag Volk und Gesundheit, pp. 24-36.
- Korioth TW, Hannam AG (1994). Deformation of the human mandible during simulated tooth clenching. J Dent Res 73:56-66.
- Krebs M., Gallo LM, Airoldi RL, Meier D., Boesiger P., Palla S. (1994). Three-dimensional animation of the temporomandibular joint. Technol Health Care 2:193-207.
- Lanshammer H. (1982). On precision limits for derivatives numerically calculated from noisy data. J Biomechan 15:63-67.
- Naeije M., van der Weijden JJ, Megens CC (1995). OKAS-3D: An opto-electronic jaw movement analysis system with six degrees of freedom. Med Biol Eng Comput 33:683-688.[Medline]
[Order article via Infotrieve]
- Osborn JW (1989). The temporomandibular ligament and the articular eminence as constraints during jaw opening. J Oral Rehabil 16:323-333.[CrossRef][Medline]
[Order article via Infotrieve]
- Osborn JW (1993). A model to describe how ligaments may control symmetrical jaw opening movements in man. J Oral Rehabil 20:585-604.[CrossRef][Medline]
[Order article via Infotrieve]
- Proschel P., Feng H., Ohkawa S., Ott R., Hofmann M. (1993). Untersuchung zur Interpretation des Bewegungsverhaltens kondylarer Punkte. Dtsch Zahnärtztl Z 48:323-326.
- Sato H., Strom D., Carlsson GE (1995). Controversies on anatomy and function of the ligaments associated with the temporomandibular joint: a literature survey. J Orofac Pain 9:308-316.[Medline]
[Order article via Infotrieve]
- Yatabe M., Zwijnenburg A., Megens CC, Naeije M. (1995). The kinematic center: a reference point for temporomandibular condylar movements. J Dent Res 74:1644-1648.
- Zwijnenburg A., Megens CC, Naeije M. (1996). Influence of choice of reference point on the condylar movement paths during mandibular movements. J Oral Rehabil 23:832-837.[Medline]
[Order article via Infotrieve]
Journal of Dental Research, Vol. 76, No. 2,
714-719 (1997)
DOI: 10.1177/00220345970760021301
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