自然头位对面部形态评估的影响。

The influence of natural head position on the assessment of facial morphology.

机构信息

Department of Orthodontics, Pomeranian Medical University, Szczecin, Poland.

出版信息

Adv Clin Exp Med. 2012 Nov-Dec;21(6):743-9.

Abstract

BACKGROUND

Skeletal relationships play a major part in determining occlusal relationships, and that is why they also affect orthodontic treatment. Facial morphology can be assessed by clinical or radiological methods. Soft tissue analysis of the face is accepted as an integral part of orthodontic diagnosis and treatment planning.

OBJECTIVES

The aim of the study was to determine the impact of the inclination between the Frankfort horizontal(FH) and the extracranial horizontal (HOR) lines with the head in the natural position (NHP) on the assessment of facial morphology.

MATERIAL AND METHODS

Lateral facial photographs of 200 young adult males and females were taken with the head in the natural head position and then analyzed. Each image was rotated in order to position the Frankfort line parallel to the extracranial horizontal line. Twelve landmarks on each of the 400 profile photographs (200 originals,200 processed) were identified, and nine linear measurements and three angular measurements were assessed.

RESULTS

The inclination angle between the extracranial horizontal line and the Frankfort horizontal line in the NHP varied from -7.1° to 5.6° (mean -1.20°). Significant correlations were found between the inclination angle FH/HOR and both sagittal and vertical morphology predictors such as the sections N-Sn (r = 0.3737, p = 0.0001), Sn-Gn(r = 0.3231, p = 0.0000), and both facial angles (r = 0.9774, p = 0.0000) and proflle angles (r = 0.9654, p = 0.0000).

CONCLUSIONS

A comparison of soft tissue measurements determined with reference to the Frankfort horizontal and extracranial horizontal lines with the head in the natural position reveals significant differences

摘要

背景

骨骼关系在确定咬合关系方面起着重要作用，这也是它们影响正畸治疗的原因。面部形态可以通过临床或影像学方法进行评估。软组织分析被认为是正畸诊断和治疗计划的一个组成部分。

目的

本研究旨在确定在自然头位（NHP）下，法兰克福平面（FH）与颅外水平面（HOR）之间的倾斜度对面部形态评估的影响。

材料与方法

对 200 名年轻成年男性和女性的侧面部照片进行拍摄，头部处于自然位置，然后进行分析。为了使法兰克福线与颅外水平线平行，每个图像都进行了旋转。在 400 张侧面照片（200 张原始照片，200 张处理后的照片）的每一张上都确定了 12 个标志点，并评估了 9 个线性测量值和 3 个角度测量值。

结果

在 NHP 中，颅外水平线与法兰克福水平线之间的倾斜角度从-7.1°到 5.6°（平均值为-1.20°）。发现 FH/HOR 倾斜角与矢状和垂直形态预测因子之间存在显著相关性，如 N-Sn 段（r = 0.3737，p = 0.0001）、Sn-Gn（r = 0.3231，p = 0.0000），以及两个面角（r = 0.9774，p = 0.0000）和剖面角（r = 0.9654，p = 0.0000）。