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KMID : 0896020080380010023
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Korean Journal of Oral and Maxillofacial Radiology
2008 Volume.38 No. 1 p.23 ~ p.27
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Positional change of the condylar heads after wearing complete denture on dental cone beam CT
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Lee Bong-Ho
Kim Jae-Deok
Chung Chae-Heon
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Abstract
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Purpose : The aim of this study was to evaluate the change in the position of the mandibular condyle within articular fossa by a CBCT after wearing complete denture (CD).
Materials & Methods : CBCT of 34 temporomandibular joints were taken from 9 male and 8 female patients with CB MercurayTM (Hitachi, Japan) before and after wearing a CD for rehabilitation. Position of mandibular condyle within articular fossa at centric occlusion was evaluated with Vimplant2.0TM (CyberMed, Korea) on the central parasagittal view and curved panoramic coronal view of the condylar head. A statistical evaluation was done with SPSS.
Results : The range of anteroposterior positional rate (AP) of condylar head within articular fossa was -16-5 and -10-12 respectively on the right and left sides. Before wearing CD, the AP rate showed discrepancy between right and left sides (p<0.05). After wearing CD, both condyles showed a tendency to decrease in posterior condylar position (right side; p<0.05). The average discrepancy between right and left side in mediolateral positional rate (MD) was 15.5 and 4.5 respectively before and after wearing CD. The improvement was observed in mediolateral relationship of both condylar heads after wearing CD (p<0.01). Before wearing CD, the average horizontal angle of long axis of condylar head was 79.6±2.7˚and 80.1±5.7˚ respectively on the right and left sides. After wearing CD, both condyles were rotated in the same direction in average on axial plane.
Conclusion : We observed with CBCT the significant clinical evidence in case of positional change of mandibular condyle after wearing complete denture.
(Korean J Oral Maxillofac Radiol 2008; 38 : 23-7)
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KEYWORD
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Tomography, Cone-Beam Computed, Temporomandibular Joint, Mandibular Condyle
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