A comparison of human jaw muscle cross-sectional area and volume in long- and short-face subjects, using MRI
A comparison of human jaw muscle cross-sectional area and volume in long- and short-face subjects, using MRI
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DOI：
10.1016/j.archoralbio.2007.08.013
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发表时间：
2008-03-01
影响因子：
3
通讯作者：
Tuinzing, D. B.
中科院分区：
文献类型：
--
作者：
Boom, H. P. W.;van Spronsena, P. H.;Tuinzing, D. B.
目的：在人类中，颅面垂直尺寸随颌骨肌肉的大小而显著变化，颌骨肌肉的大小被认为是颅面生长的重要控制因素。最大横截面积（CSA）的功能相关性，表明最大的肌肉力量，是值得怀疑的，因为峰值力量只产生了一天的一小部分。另外，肌肉体积（表示产生的负载）可能是一个更有意义的功能variable.Therefore，本研究的目的是调查，如果颌骨肌肉体积是强相关的垂直颅面尺寸比颌骨肌肉CSA.Design：31名成年健康受试者不同的垂直颅面形态参加了这项研究。轴向磁共振成像（MRI）扫描用于分割咬肌（Mas）和翼内肌（MPM）。这使得能够测量肌肉CSA和体积。使用侧位X线片进行头影测量分析。通过因子分析，头影测量变量的数量减少到两个因素，分别代表前面高和后面高（PFH）。随后，这些因素和肌肉变量之间的相互关系进行了评估，使用多元回归analysis.Results：结果发现，垂直颅面尺寸显着更好（高达12%）与肌肉体积，而不是与CSA。特别是PFH因子与Mas和MPM之间存在显著相关。与CSA相比，尺寸与颌骨肌肉体积的相关性更强。然而，可以假设产生的肌肉负荷，而不是最大的力量，影响垂直颅面生长。(C)2007爱思唯尔有限公司保留所有权利。
Objective: In humans, the vertical craniofacial dimensions vary significantly with the size of the jaw muscles, which are regarded as important controlling factors of craniofacial growth. The functional relevance of the maximum cross-sectional area (CSA), indicating maximum muscle strength, is questionable since peak forces are generated only a fraction of the day. Alternatively, muscle volume (indicating the generated loads) might be a more meaningful functional variable.Therefore, the aim of this study was to investigate if jaw muscle volume is stronger related with vertical craniofacial dimensions than with jaw muscle CSA.Design: Thirty-one adult healthy subjects with varying vertical craniofacial morphology participated in this study. Axial magnetic resonance imaging (MRI) scans were used for segmentation of the masseter (Mas) and medial pterygoid muscles (MPM). This enabled measurements of the muscle CSA and volume. Cephalometric analysis was performed using lateral radiographs. With factor analysis, the number of cephalometric variables was reduced into two factors that represented the anterior face height and the posterior face height (PFH), respectively. Subsequently, mutual relationships between these factors and muscular variables were assessed using a multiple regression analysis.Results: It was found that vertical craniofacial dimensions were significantly better (up to 12%) related with muscle volume rather than with CSA. Furthermore, it was shown that especially the PFH factor was significantly correlated with the Mas and MPM.Conclusion: Vertical craniofacial. dimensions are stronger related with jaw muscle volume than with CSA. Tentatively, it can be assumed that the generated muscle loads, rather than maximum forces, influence vertical craniofacial growth. (C) 2007 Elsevier Ltd. All rights reserved.