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目的:探讨Frankel功能矫治器(FR-Ⅲ)矫治早期骨性Ⅲ类错的唇部与硬组织变化及垂直向的相关性。方法:选择18例早期骨性Ⅲ类错患者,采用FR-Ⅲ进行矫治,对矫治前后的软硬组织头影测量值进行统计分析。结果:SNB、L1/MP减小(P<0.05),ANB、A-PTV、Go-Me、U1E-PTV增加(P<0.05或P<0.01)。下唇厚度增加,LL-EP减小(P<0.05)。上唇厚度的变化与倾斜角、上切牙以及上颌第一磨牙的牙槽高度呈负相关(r=-0.645,P<0.05;r=-0.662,P<0.05;r=-0.875,P<0.01),下唇厚度的变化与倾斜角、上切牙以及上颌第一磨牙的牙槽高度呈正相关(r=0.755,P<0.05;r=0.651,P<0.05;r=0.945,P<0.01);上唇倾角的变化与上颌第一磨牙牙槽高度呈正相关(r=0.721,P<0.05)。结论:唇部形态随着硬组织的变化而趋于协调,唇部厚度与牙齿位置改变密切相关。
OBJECTIVE: To investigate the lip and hard tissue changes and vertical correlations of Frankel functional appliance (FR-Ⅲ) in the treatment of early stage skeletal Class Ⅲ malocclusion. Methods: Eighteen patients with early stage orthotopic skeletal Class Ⅲ malocclusion were selected and treated by FR-Ⅲ. The cephalometric measurements of the hard and soft tissues before and after the treatment were statistically analyzed. Results: SNB, L1 / MP decreased (P <0.05), and ANB, A-PTV, Go-Me and U1E-PTV increased (P <0.05 or P <0.01). Lower lip thickness increased, LL-EP decreased (P <0.05). The thickness of the upper lip was negatively correlated with the angle of inclination, the height of the upper incisor and the maxillary first molar (r = -0.645, P <0.05; r = -0.662, P <0.05; ), There was a positive correlation between the thickness of the lower lip and the angle of inclination, the height of the upper incisor and the maxillary first molar (r = 0.755, P <0.05; r = 0.651, P < The change of upper lip inclination was positively correlated with the alveolar height of the maxillary first molar (r = 0.721, P <0.05). CONCLUSIONS: The morphology of lips tends to coordinate with the change of hard tissue, and the thickness of lip is closely related to the change of tooth position.