Correlations between incisor and condylar movements during lateral excursion in children with primary dentition.
Correlations between incisor and condylar movements during lateral excursion in children with primary dentition.
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DOI：
10.1111/j.1365-2842.2006.01715.x
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发表时间：
2007-11
影响因子：
2.9
通讯作者：
I. Saitoh;J. Tokutomi;H. Hayasaki;Y. Iwase;H. Raoquig;Y. Yamasaki;K. Nonaka
中科院分区：
文献类型：
--
作者：
I. Saitoh;J. Tokutomi;H. Hayasaki;Y. Iwase;H. Raoquig;Y. Yamasaki;K. Nonaka
本研究的目的是寻找下切牙运动与工作和平衡髁运动之间的关系，在儿童的初级牙和成人恒牙的横向偏移。使用TRI-MET（六自由度光电分析系统）以100 Hz的采样频率记录下颌运动。运动数据被传送到图形工作站进行分析。受试者按年龄分为两组。原牙组19名儿童（平均年龄5岁5个月，平均年龄8.7个月），恒牙组22名妇女（平均年龄20岁5个月，平均年龄26.3个月）。两组患者咬合及颞下颌关节正常，无正畸治疗史。采用多层统计模型估计了切牙与平衡髁和工作髁的三个正交偏移范围和三维线性距离，以及切牙与平衡髁和工作髁在横向偏移过程中的个体间和个体内相关性。与成人相比，初生牙列儿童侧移的特点是切牙的偏移范围和三维线性距离较小，并且切牙与平衡髁运动之间的个体间和个体内相关性强于成人。在儿童和成人中，门牙的外侧偏移是平衡髁运动程度的良好指标，但不是工作髁运动的指标。
The purpose of this study was to look for associations between lower incisor movement and working and balancing condylar movement during lateral excursion in children with primary dentition and adults with permanent dentition. Mandibular movement was recorded using a TRI-MET (an optoelectronic analysis system with six degrees-of-freedom) at a sampling frequency of 100 Hz. The movement data was transferred to a graphics workstation for analysis. Subjects were categorized by age into two groups. The primary dentition group consisted of 19 children (mean age: 5 years and 5 months, s.d.: 8.7 months), and the permanent dentition group consisted of 22 women (mean age: 20 years and 5 months, s.d.: 26.3 months). The occlusion and TMJ in both groups were normal, with no history of orthodontic treatment. Three orthogonal excursive ranges and the 3D linear distance of the incisal and balancing and working condylar points, along with inter- and intra-individual correlations between the incisor and the balancing and working condyles during lateral excursion, were estimated by using multilevel statistical models. Lateral excursion in children with primary dentition was characterized by smaller incisor excursive ranges and 3D linear distance than in adults, and stronger inter- and intra-individual correlations between incisor and balancing condylar movements than in adults. In both children and adults the lateral excursion of the incisor was a good indicator of the extent of balancing condylar movement, but not working condylar movement.