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Association between dental occlusal variables and intraarticular temporomandibular joint disorders: horizontal and
J Kahn1, R H Tallents, R W Katzberg
1University of Rochester, Eastman Dental Center, N.Y., USA.
Statement Of Problem:
It has been suggested that dental occlusion may play a role in the development of intraarticular temporomandibular joint disorders.
Purpose:
This study evaluated the relationship between horizontal and vertical overlap and intraarticular temporomandibular joint disorders.
Material And Methods:
Vertical and horizontal overlap of the anterior teeth of 82 asymptomatic volunteers and 263 symptomatic patients were examined.
Results:
Fifty-five (67%) of the asymptomatic volunteers had normal joints and 27 (33%) had disk displacement. Two hundred and twenty-one patients (84%) had disk displacement and 42 (16%) had bilateral symptomatic normal joints. Horizontal overlap equal to or greater than 4 mm was more prevalent in the symptomatic patient group as compared with the asymptomatic volunteer group (p < 0.05). Vertical overlap equal to or greater than 4 mm demonstrated no significant differences.
Conclusion:
Horizontal overlap equal to or greater than 4 mm was greater in symptomatic patients with intraarticular temporomandibular joint disorders.