王文婷 戴娟 曹军

[摘要]目的：通过对成人正常牙合人群面下1/3软硬组织两组测量指标进行典型相关分析，以期为临床诊断和治疗提供参考。方法：选取120名正常牙合成人为研究对象，在X线头颅侧位定位片上分别测量面下1/3软硬组织指标16项，采用SPSS 20.0对面下1/3软硬组织这两组测量指标进行典型相关分析。结果：正常牙合成人面下1/3软组织变量组的典型变量与Li-E线距呈中度正相关，与上下唇厚度、颏沟倾角呈低度负相关;硬组织变量组的典型变量与U1-SN角、U1-NA角呈高度正相关，与SN-MP角、L1-NB角呈低度正相关。结论：正常牙合成人上下切牙倾斜度、垂直骨面型与上下唇厚度、下唇突度和颏唇形态有关，其中上前牙位置对下唇突度影响较大。

[关键词]正常牙合;软组织;硬组织;面下1/3;典型相关分析

[中图分类号]R782.2    [文献标志码]A    [文章编号]1008-6455（2021）01-0100-03

Hard and Soft Tissue Correlation in the Lower Anterior Face in Normal Occlusion：A Canonical Correlation Study

WANG Wen-ting，DAI Juan， CAO Jun

（Department of Stomatology，Shenzhen University General Hospital， Shenzhen 518055，Guangdong，China）

Abstract： Objective The purpose of this study was to analyze the relationship between facial hard and soft tissues in the lower anterior face in normal individuals by studying the canonical correlation between specific hard tissue landmarks and their corresponding soft tissue landmarks. Methods A retrospective study was designed，with a sample size of 120 adults who had a class I skeletal and dental relationship and normal occlusion. Lateral cephalometric radiographs of the study sample were investigated using a series of 16 linear and angular measurements of hard and soft tissue features. The measurements were done and analyzed using canonical correlation by SPSS 20.0 software. Results It was found that the canonical variate for soft tissue variables had a moderate positive loading with Li-E，and low negative loadings with the thickness of lower lip， the thickness of upper lip， and PgSi-FH.The canonical variate for hard tissue variables had heavy positive loadings with U1 to SN and U1 to NA ， and low negative loadings with SN to MP and L1 to NB. Conclusion  The inclination of the upper and lower incisors and vertical growth pattern were associated with the thickness and position of upper and lower lips and the morphology of mentolabial sulcus. Basides， the position of upper incisior had a greater influence on the position of lower lip .

Key words：normal occlusion;soft tissue; hard tissue; the lower anterior face; canonical correlation

随着人们对面部美观的重视，正畸治疗后对软组织变化的预测变得尤为重要。正畸治疗主要是通过调整上下牙弓和牙槽骨的位置与形态、改变上下颌骨的生长方向与增量，来重新构建软硬组织之间的协调，平衡美观。其中上下唇形态与突度、鼻唇角与颊唇沟的大小、颏部形态等软组织结构，对面部美观影响较大[1]。基于正畸诊断设计及预后分析的需要，本文旨在通过典型相关分析，进一步对面部软组织指标与其相应的硬组织指标进行相关分析，以期为正畸临床診断和预测提供依据。

1  资料和方法

1.1 研究对象：从2011～2015年级第四军医大学本科生 中随机选取120名正常牙合个体。……