Occlusal contact area of mandibular teeth during lateral excursion.
Occlusal contact area of mandibular teeth during lateral excursion.
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发表时间：
2004
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影响因子：
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通讯作者：
H. Hayasaki;A. Okamoto;Y. Iwase;Y. Yamasaki;M. Nakata
中科院分区：
文献类型：
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作者：
H. Hayasaki;A. Okamoto;Y. Iwase;Y. Yamasaki;M. Nakata
目的：本研究观察了下颌牙齿，特别是磨牙在主动侧移时的咬合接触，并确定了其区域。材料与方法采用下颌运动三维跟踪与牙形三维数字化相结合的测量系统估算牙合接触面积。16名恒牙健康的女性参与了研究。结果在牙尖间位置，下颌第一磨牙和第二磨牙的咬合接触面积平均分别为12.6 mm2和9.0 mm2。然而，在横向偏移3.0 mm后，它们的面积在工作侧分别急剧减少到2.2 mm2和1.5 mm2，在非工作侧分别减少到0.4 mm2和1.1 mm2。结论工作侧磨牙与非工作侧磨牙的咬合接触面积随着侧移的进行而不同。
PURPOSE This study observed occlusal contacts and determined their areas on the mandibular teeth, especially the molars, during voluntary lateral excursions. MATERIALS AND METHODS Occlusal contact areas were estimated with a measurement system combining 3-D tracking of mandibular movements with 3-D digitization of tooth shape. Sixteen women with sound permanent dentitions participated. RESULTS At the intercuspal position, estimated occlusal contact areas of the first and second mandibular molars were on average 12.6 mm2 and 9.0 mm2, respectively. However, after 3.0 mm of lateral excursion, their areas were sharply reduced to 2.2 mm2 and 1.5 mm2 on the working side, and 0.4 mm2 and 1.1 mm2 on the nonworking side, respectively. CONCLUSION These results suggest that the occlusal contact areas on working- and nonworking-side molars differ from each other as lateral excursion proceeds.