Archer S Y, Vig P S
Am J Orthod. 1985 Apr;87(4):311-8. doi: 10.1016/0002-9416(85)90006-5.
Variations in resting lip and tongue pressures and their relationship to alterations in head posture were investigated in subjects with Class I and Class II dental and skeletal morphology. Intraoral pressures were measured by means of transducers mounted in plastic carriers, customized for each subject from dental casts. Transducers were placed in the carriers to measure posterior lingual, anterior lingual, and labial pressures along the mandibular dentition. Ten Class I subjects and eleven Class II subjects participated. Pressures were recorded in natural head position, with 20 degrees of head extension and 20 degrees of head flexion. The Friedman two-way analysis of variance using ranked data was used to compare transducer location and head posture within skeletal classes. Anterior pressures were found to differ from posterior pressures in both classes. In Class I subjects, posterior lingual pressures were consistently different from labial pressures in all head positions. In Class II subjects, posterior lingual pressures differed from labial pressures in flexion and natural head positions, and from anterior lingual pressures in flexion and natural head positions. No increase in labial pressures with head extension was found in either Class I or Class II samples. Since every subject showed pressure changes with changes in head position, the influence of posture should be considered in studies on facial morphology and dental equilibrium.
在具有I类和II类牙齿及骨骼形态的受试者中，研究了静息时唇部和舌部压力的变化及其与头部姿势改变的关系。通过安装在塑料载体中的传感器测量口腔内压力，该塑料载体根据每个受试者的牙模定制。将传感器放置在载体中，以测量沿下颌牙列的舌后、舌前和唇部压力。十名I类受试者和十一名II类受试者参与了研究。在自然头位、头部伸展20度和头部屈曲20度的情况下记录压力。使用基于秩次数据的Friedman双向方差分析来比较骨骼类别内的传感器位置和头部姿势。在两类受试者中均发现前位压力与后位压力不同。在I类受试者中，在所有头位下舌后压力始终与唇部压力不同。在II类受试者中，舌后压力在屈曲和自然头位时与唇部压力不同，在屈曲和自然头位时与舌前压力不同。在I类或II类样本中均未发现随着头部伸展唇部压力增加。由于每个受试者都表现出压力随头部位置的变化而变化，因此在面部形态学和牙齿平衡的研究中应考虑姿势的影响。
