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Kineziographic Research of Patients with Cross Bite

R. Gržić
Z. Kovač
D. Kovačević
I. Uhač
Z. Delić

Puni tekst: engleski pdf 56 Kb

str. 57-62

preuzimanja: 518



The paper describes the use of an objective method for the quantitative analysis of the
relationship between the posterior cross-bite and the occurrence of occlusive interferences
and damages to the mandible muscle elevator. Two groups of subjects were selected
for the analysis: 10 patients with unilateral cross-bite and 10 students without
any symptoms of temporomandibular disorders (TMD). By means of the Robert Jenkelson
K5A kinesiograph we measured maximal – opening velocity of the mandible
(mm/s), maximal- closing velocity (mm/s), first tooth contact velocity and displacement
in the vertical plane at the maximal intercuspidation (mm). The following values were
obtained: maximal-opening velocity in the first group was 349 mm/s and 380 mm/s in
the control group. This difference was incidental. The maximal closing velocity in the
study group was 204.9 and 345.2 in the control group (p < 0.05). The first tooth contact
velocity in the study group was 75.93 and 325 in the control group (p < 0.01). Displacements
in the vertical plane at the maximal intercuspidation in the investigated group
was 0.240.01 mm, while in control group that value was 0120.012 mm.

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