Incisor and mandibular condylar movements of young adult females during maximum protrusion and lateratrusion of the jaw
Incisor and mandibular condylar movements of young adult females during maximum protrusion and lateratrusion of the jaw
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DOI：
10.1016/s0003-9969(00)00096-0
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发表时间：
2001-01-01
影响因子：
3
通讯作者：
Hayasaki, H
中科院分区：
文献类型：
--
作者：
Buschang, PH;Throkmorton, GS;Hayasaki, H
本研究旨在评估最大前伸和侧移过程中髁突平移和切牙运动之间的相关性。样本为27名成年女性（23-35岁），选择正常颞下颌关节功能、咬合和骨骼模式。使用光电（Optotrak（R））下颌跟踪系统在三维空间中记录髁突和下颌中切牙运动[直线距离（LD）和曲线路径（CP）]，持续20 s，同时每位参与者进行多个最大向前移动和侧向移动周期。咀嚼运动分析和多水平统计程序计算了前伸和侧移时切牙和髁突铰链轴的三维运动，前伸时切牙点CP平均为12.0mm（9.3mmLD），右移时为13.0mm（11.5mmLD），左移时为12.3mm（11.0mmLD）。前伸过程中髁突的CP平均为11.9-12.9（9.2-9.5 LD）mm。侧旋时，对侧髁突向前移位11.6- 14.1mm（9.5- 10.2mm LD），同侧髁突后外侧移位5.8- 6.8mm（2.3- 2.5mm LD）。前伸时左侧髁突的运动量大于右侧髁突，侧伸时左侧髁突的运动量大于对侧髁突。相对变化，测量的变异系数，是更大的运动的同侧比对侧髁。门齿运动只是中度相关的髁突运动之间的个人和复制; LD显示出较强的相关性比CP和相关性比突出lateratrusion强。虽然切牙和髁状突的运动不受重复前突的影响，但切牙CP（约为100%）。0.2 mm/循环）和LD（约0.1 mm/周期）随着向左和向右的重复性伸展运动而显著增加。得出的结论是：（1）门齿前伸和侧屈提供了髁突平移的中等可靠的测量;（2）侧屈过程中门齿移动的线性距离提供了对侧髁突平移的最佳测量;（3）髁突移动不受重复前伸或侧屈的影响。(C)2000爱思唯尔科技有限公司版权所有。
This study evaluated the correlations between condylar translation and incisor movements during maximum protrusion and lateratrusion. The sample was 27 adult females (23-35 years old), selected for normal temporomandibular function, occlusion, and skeletal patterns. Condylar and mandibular central incisor movements [linear distances (LD) and curvilinear pathways (CP)] were recorded in three dimensions for 20 s with an optoelectric (Optotrak(R)) jaw-tracking system while each participant performed multiple maximum protrusive and lateratrusive cycles. Masticatory analysis and multilevel statistical programs computed the three-dimensional movements of the incisors and condylar hinge axis during protrusion and lateratrusion, CP of the incisor point averaged 12.0 mm (9.3 mm LD) during protrusion, 13.0 mm (11.5 mm LD) during right excursion and 12.3 mm (11.0 mm LD) during left excursion. CP Of the condyles averaged 11.9-12.9 (9.2-9.5 LD) mm during protrusion. During lateratrusion the contralateral condyles moved anteroinferiorly 11.6-14.1 mm (9.5-10.2 mm LD); the ipsilateral condyles moved posterolaterally 5.8-6.8 mm (2.3-2.5 mm LD). The left condyles demonstrated more movement than the right condyles during protrusion and than the contralateral condyles during laterotrusion. Relative variation, as measured by the coefficient of variation, was greater for the movements of the ipsilateral than contralateral condyles. Incisor movements were only moderately related to condylar movements between individuals and between replicates; LDs showed stronger correlations than CPs; and correlations were stronger for lateratrusion than protrusion. While incisor and condylar movements were not affected by repeated protrusion, incisor CP (approx. 0.2 mm/cycle) and LD (approx. 0.1 mm/cycle) increased significantly with repeated excursive movements to the left and right. It was concluded that (1) incisor protrusion and lateratrusion provide moderately reliable measures of condylar translation: (2) the linear distances that the incisors move during lateratrusion provide the best measure of contralateral condylar translation: and (3) condylar movements are not affected by repeated protrusion or lateratrusion. (C) 2000 Elsevier Science Ltd. All rights reserved.