Department of Orthodontics, Technical University of Dresden, Dresden, Germany.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 Mar;115(3):406-14. doi: 10.1016/j.oooo.2012.11.017.
The objective of this study was to investigate differences in masseter metabolism by (31)P-Chemical Shift Imaging (CSI) in adult individuals with different vertical facial patterns. The clinical study should be supported by functional findings at the mRNA level after orthognathic surgery.
Twenty-two male volunteers (mean age 24.6) were divided into a deep-bite (NL/ML 11.8 ± 2.3°) and open-bite group (NL/ML 34.1 ± 2.6°). Vertical jaw relationship, gonial angle, and masseter volume were defined and compared with the phosphate values obtained from the (31)P spectra. Student t test and regression analysis were used.
Phosphocreatine related strongly to muscle volume (P < .001), gonial angle (P < .001), and ML/NL angle (P < .01). Pi was found to be related to gonial angle (P < .05). Muscle volume was found to be inversely related to ML/NL (P < .01) and to the gonial angle (P < .01).
A difference in masseter muscle metabolism between long- and short-faced subjects was confirmed at rest position.
本研究旨在通过（31）磷化学位移成像（CSI）研究不同垂直面型成人的咬肌代谢差异。该临床研究应通过正颌手术后的功能发现得到支持。
22 名男性志愿者（平均年龄 24.6 岁）分为深覆颌组（NL/ML 11.8±2.3°）和开颌组（NL/ML 34.1±2.6°）。垂直颌关系、下颌角和咬肌体积被定义，并与（31）磷谱获得的磷酸盐值进行比较。采用学生 t 检验和回归分析。
磷酸肌酸与肌肉体积（P<0.001）、下颌角（P<0.001）和 ML/NL 角（P<0.01）密切相关。Pi 与下颌角（P<0.05）有关。肌肉体积与 ML/NL（P<0.01）和下颌角（P<0.01）呈负相关。
在休息位时，长面型和短面型患者的咬肌代谢存在差异。
