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Quantitative analysis of occlusal force balance in ...(定量分析咬合的力平衡)
Sadamori et al. Int Chin J Dent 2007; 7: 43-47.
Quantitative analysis of occlusal force balance in intercuspal
position using the Dental Prescale system in patients with
temporomadibular disorders
a b
Shinsuke Sadamori, DDS, PhD, Hiroo Kotani, DDS, PhD, Hitoshi Abekura, DDS,
a a
PhD, and Taizo Hamada, DDS, PhD
aDepartment of Prosthetic Dentistry, Programs for Applied Biomedicine Division of Cervico-
Gnathostomatology, Hiroshima University Graduate School of Biomedical Sciences, and
b
Kotani Dental Office, Hiroshima, Japan
Purpose: This study evaluated the quantitative analysis of occlusal data (occlusal contact areas, maximum
pressure, mean pressure, occlusal force, and occlusal force balance) in intercuspal position in both healthy
subjects and patients with temporomadibular disorders (TMD).
Materials and Methods: The occlusal data in intercuspal position were measured using the Dental Prescale
system in 15 healthy persons and 16 patients with TMD, i.e., myofascial pain dysfunction syndrome (MPD
group; eight patients) and disorders of the temporomandibular joints (TMJ group; eight patients). Force
asymmetry index (force AI) was calculated to evaluate the occlusal force balance of the right and left sides.
Results: The value of the force AI of MPD patients was higher than that of healthy subjects. The mean of
pressures and force AI of TMJ patients were higher than those of healthy subjects. The values of occlusal
contact areas and occlusal force in TMJ patients were lower than those in healthy subjects, while the values of
occlusal contact
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