ĐẶC ĐIỂM HÌNH THÁI TRÊN PHIM SỌ THẲNG Ở NGƯỜI BỆNH MẤT CÂN XỨNG MẶT

Abstract

Objective: To compare some morphological characteristics of craniofacial bones on posteroanterior cephalometric radiographs in patients with facial asymmetry and those without facial asymmetry. Subjects and Methods: This was a cross-sectional descriptive study conducted on posteroanterior cephalometric radiographs of 31 patients aged 16 years and older, diagnosed with facial asymmetry at Hanoi Central Odonto-Stomatology Hospital, and 10 individuals aged 16 years and older with clinically undetected facial asymmetry. Results: Among the 31 patients with facial asymmetry, 58,06% were female. The patients showed a higher rate of left chin deviation, accounting for 66,67%, which was twice the rate of right-sided asymmetry. The chin deviation, lower jaw midline deviation, and lateral deviation of the anterior mandibular angle in the facial asymmetry group were 12,2 ± 1,06mm, 0,97 ± 0,39mm, and 3,93 ± 0,46mm, respectively, which were significantly higher than those in the non-asymmetry group. The occlusal plane inclination in the facial asymmetry group was greater by 1,73 ± 0,31mm compared to the non-asymmetry group. The difference in the mandibular deviation angle between the two groups was 11,15 ± 0,93 degrees. In the facial asymmetry group, the occlusal plane deviation angle and mandibular angle deviation were significantly higher, measuring 2,2 ± 0,44 degrees and 1,74 ± 0,54 degrees, respectively, compared to the non-asymmetry group. Conclusion: The majority of patients had left-sided facial asymmetry. Facial asymmetry has less impact on the middle face but primarily affects the lower face, specifically with deviations of the face often accompanying deviations of the chin, mandibular angle, and lower jaw midline.