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Motion of the Human Mandibular Condyle during Mastication

'Department of Orthodontics, Okayama University Dental School, 2-5-1 Shikata-Cho, Okayama 700-8525, Japan

Y. Tanimoto

'Department of Orthodontics, Okayama University Dental School, 2-5-1 Shikata-Cho, Okayama 700-8525, Japan

T. Kawakami

Department of Oral and Maxillofacial Surgery, Nara Medical University, Japan

M. Sugimura

Department of Oral and Maxillofacial Surgery, Nara Medical University, Japan

T. Takano-Yamamoto

'Department of Orthodontics, Okayama University Dental School, 2-5-1 Shikata-Cho, Okayama 700-8525, Japan, t_yamamo{at}dent.okayama-u.ac.jp

It has been reported that loading to the mandible during closing movement makes the condylar path move more in the superior direction than that during the free closing movement. In this study, the hypothesis was tested that the displacement of the condyle on the chewing side is greater in the direction of the mandibular fossa than that on the non-chewing side. Using a six-degrees-of-freedom jaw movement recording system, we recorded condylar motion in 12 healthy adults without TMD, during the chewing of a large hard gummy jelly. The maximum displacements at the condyle on the chewing side from the maximum intercuspation (CO) position were significantly larger in the superior and medial directions at the initial stage and in the posterior direction at all stages (0.5 mm, 0.5 mm, and 0.6 mm, respectively) than those on the non-chewing side (0.0 mm, 0.1 mm, and 0.1 mm, respectively). This suggests that, in healthy adults, the condyles at CO are located in a position such that excessive load is not applied to the temporomandibular joint when there are the aforementioned displacements.

Key Words: displacement • mandibular condyle • mastication • motion

REFERENCES

• Agerberg G., Carlsson GE (1975). Symptoms of functional disturbances of the masticatory system. A comparison of the frequencies in a population sample and in a group of patients. Acta Odontol Scand 33:183-190.[Medline] [Order article via Infotrieve]
• Becker CM, Kaiser DA, Schwalm C. (2000). Mandibular centricity: centric relation. J Prosthet Dent 83:158-160.[Medline] [Order article via Infotrieve]
• Crawford SD (1999). Condylar axis position, as determined by the occlusion and measured by the CPI instrument, and signs and symptoms of temporomandibular dysfunction. Angle Orthod 69:103-115.[Medline] [Order article via Infotrieve]
• DuBrul EL (1988). Oral anatomy. St. Louis, MO: Ishiyaku EuroAmerica, pp. 107-132.
• Gibbs CH, Lundeen HC (1982). Jaw movements and forces during chewing and swallowing, and their clinical significance. In: Advances in occlusion. 1sted. Lundeen HC, Gibbs CH, editors. Boston: John Wright, pp. 2-32.
• Hannam AG, Scott JD, De Cou RE (1977). A computer-based system for the simultaneous measurement of muscle activity and jaw movement during mastication in man. Arch Oral Biol 22:17-23.[Medline] [Order article via Infotrieve]
• Hayashi T., Iijima T. (1987). A method of extracting a kinematic characteristic from the motion of a rigid body: estimation of the reciprocating point of a rigid body moving periodically in a two dimensional space. IEICE Trans 70(D):1157-1163.
• Hiiemae K., Heath MR, Heath G., Kazazoglu E., Murray J., Sapper D., et al. (1996). Natural bites, food consistency and feeding behaviour in man. Arch Oral Biol 41:175-189.[CrossRef][Medline] [Order article via Infotrieve]
• Horio T., Kawamura Y. (1989). Effects of texture of food on chewing patterns in the human subject. J Oral Rehabil 16:177-183.[Medline] [Order article via Infotrieve]
• Huddleston Slater Jjr, Visscher CM, Lobbezoo F., Naeije M. (1999). The intra-articular distance within the TMJ during free and loaded closing movements. J Dent Res 78:1815-1820.
• Ito T., Gibbs CH, Marguelles-Bonnet R., Lupkiewicz SM, Young HM, Lundeen HC, et al. (1986). Loading on the temporomandibular joints with five occlusal conditions. J Prosthet Dent 56:478-484.[Medline] [Order article via Infotrieve]
• Jemt T., Karlsson S., Hedegard B. (1979). Mandibular movements of young adults recorded by intraorally placed light-emitting diodes. J Prosthet Dent 42:669-673.[Medline] [Order article via Infotrieve]
• Kumai T. (1993). Difference in chewing patterns between involved and opposite sides in patients with unilateral temporomandibular joint and myofascial pain-dysfunction. Arch Oral Biol 38:467-478.[Medline] [Order article via Infotrieve]
• Lucas PW, Ow RK, Ritchie GM, Chew CL, Keng SB ( 1986). Relationship between jaw movement and food breakdown in human mastication. J Dent Res 65:400-404.
• Lundeen HC (1974). Centric relation records: the effect of muscle action. J Prosthet Dent 31:244-253.[Medline] [Order article via Infotrieve]
• Miyawaki S., Ohkochi N., Kawakami T., Sugimura M. (2000a). Effect of food size on the movement of the mandibular first molars and condyles during deliberate unilateral mastication in humans. J Dent Res 79:1525-1531.
• Miyawaki S., Ohkochi N., Kawakami T., Sugimura M. (2000b). Changes in masticatory muscle activity according to food size in experimental human mastication. J Oral Rehabil 28 (in press).
• Okeson JP (1998). Criteria for optimum functional occlusion. In: Management of temporomandibular disorders and occlusion. 4th ed. St. Louis: Mosby, pp. 109-126.
• Plesh O, Bishop B., McCall W. (1986). Effect of gum hardness on chewing pattern. Exp Neurol 92:502-512.[CrossRef][Medline] [Order article via Infotrieve]
• Seligman DA, Pullinger AG (1991). The role of functional occlusal relationships in temporomandibular disorders: a review. J Craniomandib Disord 5:265-279.[Medline] [Order article via Infotrieve]
• Steiner JE, Michman J., Litman A. (1974). Time sequence of the activity of the temporal and masseter muscles in healthy young human adults during habitual chewing of different test foods. Arch Oral Biol 19:29-34.[CrossRef][Medline] [Order article via Infotrieve]
• Stohler CS (1986). A comparative electromyographic and kinesiographic study of deliberate and habitual mastication in man. Arch Oral Biol 31:669-678.[Medline] [Order article via Infotrieve]
• Takada K., Miyawaki S., Tatsuta M. (1994). The effects of food consistency on jaw movement and posterior temporalis and inferior orbicularis oris muscle activities during chewing in children. Arch Oral Biol 39:793-805.[CrossRef][Medline] [Order article via Infotrieve]
• Tay DK, Soh G., Tan LS, Tan KL (1989). The prevalence of unilateral mastication in a non-patient population: a pilot study. Ann Acad Med Singapore 18:556-559.[Medline] [Order article via Infotrieve]
• Tokiwa H., Miura F., Kuwahara Y., Wakimoto Y., Tsuruta M. (1996). Development of a new analyzing system for stomatognathic functions. J Jpn Soc Stomatognath Funct 3:11-24.
• Utt TW, Meyers CE Jr, Wierzba TF, Hondrum SO (1995). A three-dimensional comparison of condylar position changes between centric relation and centric occlusion using the mandibular position indicator. Am J Orthod Dentofac Orthop 107:298-308.[CrossRef][Medline] [Order article via Infotrieve]
• Van der Bilt A., Van der Glas HW, Olthoff LW, Bosman F. (1991). The effect of particle size reduction on the jaw gape in human mastication. J Dent Res 70:931-937.
• Watt DM ( 1976). Monitoring mastication. J Dent 4:271-278.[Medline] [Order article via Infotrieve]
• Wickwire NA, Gibbs CH, Jacobson AP, Lundeen HC (1981). Chewing patterns in normal children. Angle Orthod 51:48-60.[Medline] [Order article via Infotrieve]
• Yatabe M., Zwijnenburg A., Megens CC, Naeije M. (1997). Movements of the mandibular condyle kinematic center during jaw opening and closing. J Dent Res 76:714-719.

Journal of Dental Research, Vol. 80, No. 2, 437-442 (2001)
DOI: 10.1177/00220345010800020701


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