成人骨性Ⅲ类不同垂直骨面型软组织侧貌特征比较

Comparison of characteristics among facial soft tissue profile in adult skeleton class Ⅲ vertical facial skeletal types

目的研究成人骨性Ⅲ类不同垂直骨面型软组织侧貌特征的差异,为临床诊断和治疗提供参考。方法选择未治疗的成年骨性Ⅲ类男性患者60例,根据下颌平面角(SN-MP)分为高、中、低角3组,每组各20例,进行X线头颅侧位片的头影测量,进行单因素方差分析,比较各组间的差异性。结果在成人骨性Ⅲ类不同垂直骨面型间,有10项指标具有统计学差异(P<0.05),且差异主要存在于高角组。与低角和均角组相比,高角组面下1/3的比例明显增大(Gl'-Sn/Sn-Me'、Sn-sto/sto-Me',P<0.01),面型凹陷程度加重(Gl'SnPog'、FH-N'Pog',P<0.05),上唇相对后缩(CotgSnLs、Sn-H line,P<0.01),下唇前突(Li-H line、Li-NsPog',P<0.05),颏唇沟变浅(Sm-H line、LiB'Pog',P<0.01)。结论成人骨性Ⅲ类患者不同垂直骨面型侧貌特征不同,在临床中要注意骨面型垂直向的差异,制定出更加合理的治疗方案。

Objective To study the differences of the facial soft tissue profile characteristics in adult skeleton class m vertical facial skeletal types. Methods Sixty males patients with skeleton class Ⅲ malocclusion were selected. They were divided into three groups ： low angle, medium angle, and high angle group based on their SN - MP angle with 20 ones in each group. The cephalometry was carried out by X ray skull lateral projection. One - factor analysis of variance was carried out, and the differences were compared among the groups. Results There were significant differences in 10 indexes among the adult skeleton class In vertical facial skeletal types （P 〈 O. 05）. And the main differences existed in the high angle group. The proportion of anterior lower 1/3 face in the high angle increased significantly compared with that in the low angle and the medium angle group （GI＇- Sn/Sn - Me, Sn - sto/sto - Me, P 〈 0.01 ） ; its degree of the facial profile introcession increased significantly （ G1SnPog, FH - N Pog, P 〈 0.05 ） ; the upper lip relatively retracted （ CotgSnLs, Sn - H line, P 〈 0. 01 ） ; the lower lip were more protrusive （ Li - H line, Li - NsPog, P 〈 0. 05 ） ; the mentolabial furrow became flatter（ Sm- H line, LiBPog, P 〈 0. 01 ）. Conclusion Patients with skeleton class Ⅲ malocclusion have different profile features of vertical facial skeletal types. The difference in the vertical skeletal pattern should be paid much attention in order to make more reasonable treatment plan.