Changes of temporomandibular joint in adolescent patients with Class Ⅱ,Category 1 malocclusion treated with self-ligating brackets analyzed by Dolphin software
Objective To explore the application of Dolphin software to analyze the changes of temporomandibular joint(TMJ)in the treatment of adolescent patients with ClassⅡ,Category 1 malocclusion treated with self-ligating brackets.Methods A retrospective study was carried out on 110 adolescent patients with ClassⅡ,Category 1 malocclusion in the Department of Stomatology of the 73rd Group Army Hospital of the Chinese People's Liberation Army from December 2020 to March 2022.There were 48 males and 62 females,with an age of(12.21±1.02)years old.All the patients were treated with self-ligating bracket appliance.Large field cone beam computed tomography(CBCT)was taken before and after correction,and Dolphin software was introduced for fixed-point measurement.The changes of TMJ before and 2 years after correction were analyzed.Paired t test was used.Results After correction,the left condylar internal and external diameter[(16.42±0.43)mm],right condylar internal and external diameter[(16.10±0.88)mm],left anteroposterior diameter[(8.62±0.80)mm],right anteroposterior diameter[(8.96±1.19)mm],left TMJ radius[(49.36±1.25)mm],right TMJ radius[(49.06±1.20)mm],left condylar height[(3.44± 0.23)mm],and right condylar height[(3.85±0.30)mm]at the axial plane were higher than those before correction(t=2.151,2.350,6.914,3.250,2.393,2.188,1.984,and 9.354;all P＜0.05).After correction,the left anterior joint space[(2.30±0.41)mm],right anterior joint space[(2.54±0.5 2)mm],left superior joint space[(2.89±0.50)mm],right superior joint space[(3.04±1.02)mm],left posterior joint space[(2.58±0.49)mm],right posterior joint space[(2.46±0.53)mm],left condylar width[(9.06±0.99)mm],and right condylar width[(10.06±1.36)mm]in the sagittal position were all greater than those before correction(t=2.231,3.635,1.996,2.281,19.761,17.790,2.076,and 3.286;all P＜0.05).After correction,the left intra-articular space[(2.86±0.78)mm],right intra-articular space[(2.77±0.63)mm],left superior articular space[(3.04±0.52)mm],right superior articular space[(3.30±0.98)mm],left external articular space[(3.64±1.00)mm],right external articular space[(3.88±1.15)mm],left condylar width[(15.00±0.82)mm],and right condylar width[(15.12±0.99)mm]in the coronal position were all greater than those before correction(t=2.101,2.183,6.097,5.189,2.073,2.292,3.020,and 2.639;all P＜0.05).Conclusion According to Dolphin software analysis,the TMJ parameters change to a certain extent after the self-ligating bracket appliance is used for the treatment of adolescent patients with Class Ⅱ,Category 1 malocclusion.
万方数据
维普
