Masseter muscle volume measured using ultrasonography and its relationship with facial morphology
Masseter muscle volume measured using ultrasonography and its relationship with facial morphology
复制标题
DOI：
10.1093/ejo/21.6.659
复制
发表时间：
1999-12-01
影响因子：
2.6
通讯作者：
Hunt, NP
中科院分区：
文献类型：
--
作者：
Benington, PCM;Gardener, JE;Hunt, NP
本研究的目的是使用三维(3D)超声测量4名男性和6名女性成人样本的咬肌收缩的体积、横截面积、厚度、宽度和长度，并将这些测量与样本面部形态的变化相关联。扫描是使用携带磁性位置传感器的手持探头进行的，这使得计算机能够将图像重建为3D切片阵列。计算机使用专门编写的软件从重建的图像中进行测量。头影测量分析最初包括7个角度变量、8个线性变量和2个比例变量，但由于这些变量具有很强的相互依存性，在与平均肌肉变量进行统计比较之前，变量被简化为4个主成分。肌肉体积、横截面积和厚度的值与以前的研究人员的值基本一致。体积与下颌骨倾斜度呈显著负相关(P<0.001.0 1)，与总后面部高度和升支高度呈显著正相关(P<0.0 1)，与后面部高度百分比降低(P<0.0 1)。长度和厚度的相关性较弱。虽然结果支持现有证据，即大咀嚼肌与短头畸形相关，反之亦然，但鉴于样本量较小，谨慎的解释是必要的。三维超声系统还处于实验阶段，需要进一步的开发和评估。
The aims of this study were to measure the volume, cross-sectional area, thickness, width, and length of contracted masseter muscles in a sample of adults, four males and six females, using three-dimensional (3D) ultrasonography, and to correlate these measurements with the variations in facial morphology of the sample. The scans were carried out bilaterally using a hand-held probe carrying a magnetic positional sensor, which enabled a computer to reconstruct the images into a 3D array of slices. Measurements were made by the computer from the reconstructed images using specially written software. Cephalometric analysis initially involved seven angular, eight linear, and two proportional variables, but as these were strongly inter-dependent, the variables were reduced to four principal components prior to statistical comparison with the mean muscle variables.The values found for muscle volume, cross-sectional area, and thickness were broadly consistent with those of previous investigators. Volume showed a significant, negative correlation with mandibular inclination including genial angle (P less than or equal to 0.001), and a significant, positive correlation with total posterior face height and ramus height (P less than or equal to 0.001), and lower posterior face height percentage (P less than or equal to 0.01). Weaker correlations were found for length and thickness.While the results support existing evidence that large masticatory muscles are associated with brachycephalism and vice verse, a cautious interpretation is necessary in view of the small sample size. The 3D ultrasonography system is at an experimental stage and requires further development and evaluation.