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Clinical Assessment and Cephalometric Characteristics in Patients with Condylar Resorption  

Koo, Seon-Ju (Department of Oral Medicine, School of Dentistry, Kyungpook National University)
Kim, Kyun-Yo (Department of Oral Medicine, School of Dentistry, Kyungpook National University)
Hur, Yun-Kyung (Department of Oral Medicine, School of Dentistry, Kyungpook National University)
Chae, Jong-Moon (Department of Orthodontics, School of Dentistry, Wonkwang university Daejeon Dental Hospital)
Choi, Jae-Kap (Department of Oral Medicine, School of Dentistry, Kyungpook National University)
Publication Information
Journal of Oral Medicine and Pain / v.34, no.1, 2009 , pp. 91-102 More about this Journal
Abstract
Condylar resorption, or condylysis can be defined as progressive alteration of condylar shape and decrease in mass. Condylar resorption is a poorly understood progressive disease that affects the TMJ and that can result in malocclusion, facial disfigurement, TMJ dysfunction, and pain. The aim of this study was to investigate clinical assessment and cephalometric characteristics in 224 patients with condylar resorption, who visited in the Department of Oral Medicine Kyungpook National University Hospital at 2006, by use of panorama, transcranial view and lateral cephalometric radiograph. The results were as follows; 1. Clinical assessment 1) Total number of patients who visited with chief complaints of TMD were 2419 and 224 (9.3%) among them revealed the condylar resorption, Among patients group with condylar resorption, female was 183 and male was 41, females were predominant. 2) Patient's age ranged from 12 to 70 and mean age was 30.6 years old with a strong predominance for 10s and 20s. Distribution of a showed as follows; 10s was 26.3%, 20s was 34,8%, 30s was 13.8%, 40s was 11.2%, 50s was 7.1%, 60s was 6.3% and 70s was 0.4%. 3) Most of the patients had parafunctional habit. 4) The case of showing the pain in condylar resorption was 145, the case of not showing the pain was 79. 5) Treatment duration of the patients was relatively short. 2. Cephalometric Characteristics 1) ANB which means the retruding of the mandible increased significantly than normal group. The ANB of female was lager than male group as the means of ANB were 5.05 in female and 3.57 in male, 2) SN-GoMe and FMA increased in resorption patients, but FH-PP did not show any significant difference. The FMA of female was lager than male group as the means were 31.69 in female and 30.44 in male. 3) Total posterior facial height was significantly smaller and total anterior facial height showed no significant increase as compared with those of the normal group. Condylar resorption was predominant in young female which was caused by more vertical facial pattern in female than male and increase of parafunctional habit in young age. It was thought that the patients who have a risk factor increasing the compressive stress at condyle caused by obliquely inclined masseter and medial pterygoid show high prevalence of condylar resorption.
Keywords
Condylar resorption; Prevalence rate; Vertical facial pattern; Parafunctional habit;
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Times Cited By KSCI : 1  (Citation Analysis)
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