치과용 콘빔 CT영상에서 총의치 장착후 하악과두의 위치변화

Abstract

Abstract

Positional change of the condylar heads after wearing complete denture on dental cone beam CT

Bong-Ho Lee, D.D.S., M.S.D. Director : Chae-Heon Chung, D.D.S., M.S.D. Ph.D. Dept. of Dentistry, Graduate School of Chosun University

Purpose : To evaluate the change in the position of the mandibular condyle within articular fossa after wearing complete denture(CD) by a cone beam computed tomography(CBCT). Materials and Methods : CBCT of 34 temporomandibular joints were acquired on 9 males and 8 females before and after wearing a CD for rehabilitation by using CB MercurayTM(Hitachi, Japan). Position of mandibular condyle within articular fossa at centric occlusion was evaluated on the central parasagittal view and curved panoramic coronal view of the condylar head made by Vimplant2.0TM(CyberMed, Korea). A statistical evaluation was done using a SPSS. Results :1. 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 side(p<0.05). After wearing CD, both condyles showed a tendency to decrease in posterior condylar position(right side; p<0.05). 2. The discrepancy between right and left side in mediolateral postional rate(MD) was average 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). 3. Before wearing CD, the horizontal angle of long axis of condylar head was average 79.6±2.7° and 80.1±5.7° respectively on the right and left sides. After wearing CD, both condyles were rotated same direction in average on axial plane. Conclusion : It was thought to be significant clinically to assess the positional change of mandibular condyle after wearing complete denture by CBCT.

KEY WORDS : Tomography, Cone Beam Computed; Temporomandibular Joint; Mandibular Condyle