Subjects in this study were 131 patients who had visited orofacial pain clinic in the department of Oral Medicine, Pusan National University Hospital with chief complaint of temporomandibular disorders and 26 normal adults without TMD symptoms. Both panorama and PA cephalogram were taken in the subjects. Points, distances and angles presenting facial asymmetry were measured and Asymmetry Index(AI) was calculated. This data was compared with sex, age, symptom and diagnosis. Skeletal facial asymmetry types were classified and analysed.
1. There was no significant difference in AI between patient and control group.
2. There was no significant difference in AI according to sex and age in patient group.
3. Mandibular lateral displacement(MLD) decreased significantly as age of patient group increased.
4. Asymmetry of mandibular ramus height(AgCo) was significantly higher n patient with mouth opening limitation than without limitation.
5. Asymmetry of mandibular body length(AgMe) was significantly higher in patient with clicking than without clicking.
6. Transverse mandibular angle(TMA) was significantly increased in unilateral chewing group than bilateral chewing group.
7. Asymmetry of mandibular body length(AgMe) was significantly higher in internal derangement group than degenerative joint disease and muscle disorder groups.
8. Condylar height(CH) in panorama was more relevant to Co-Ag in PA cephalogram than ramus height(RH) in panorama.
9. Skeletal facial asymmetry type was classified into 5 different group; Normal, Midline, Transverse, Rotation and Cross by MLD and TMA study suggested the normal range of facial asymmetry index.
There was no significant difference in facial asymmetry between temporomandibular disorders patients and control group but internal derangement group showed significantly higher facial asymmetry than degenerative joint disease and muscle disorder groups.
|