Millstein P, Maya A
Tufts University School of Dental Medicine, Boston, Mass., USA.
J Am Dent Assoc. 2001 Sep;132(9):1280-6; quiz 1319. doi: 10.14219/jada.archive.2001.0373.
Dentistry needs an accurate means of recording occlusal contacts. The authors undertook a study to evaluate the accuracy of occlusal contact marking indicators and the reproducibility of their results.
The authors recorded occlusal contact areas using occlusal indicators made of paper, film and silk. They studied 10 indicators by testing them on articulator-mounted, impact-resistant casts and measuring the surface area of the resultant contact marks made on impact using a video camera, a frame grabber and a computer-linked image analyzer.
All indicators differed in surface area markings between and within groups. The indicator's thickness and color and the material from which it was made separately and interactively had an effect on the size of the markings. Measurements were evaluated at a P = .05 significance level. The authors used Bonferroni-adjusted cutoffs when computing post hoc pairwise comparisons. The data were grouped into four categories: descriptive statistics, comparison of indicators by surface area marked, indicator thickness and repeatability.
Indicators vary, and their markings may not be repeatable even when they are used alike. Further study is required, as is the development of an indicator measuring standard.
Indicators are used to determine occlusal disharmony and to establish occlusal harmony. Since the accuracy of the markings can be questioned, the interpretation of the markings may be correct but the accuracy of the markings themselves may be misleading.
牙科需要一种准确记录咬合接触的方法。作者开展了一项研究，以评估咬合接触标记指标的准确性及其结果的可重复性。
作者使用由纸、胶片和丝绸制成的咬合指标记录咬合接触区域。他们通过在安装于牙合架上的抗冲击模型上进行测试，并使用摄像机、图像采集卡和计算机连接的图像分析仪测量冲击时产生的接触痕迹的表面积，对10种指标进行了研究。
所有指标在组间和组内的表面积标记均存在差异。指标的厚度、颜色及其制作材料分别以及相互作用对标记的大小均有影响。测量结果在P = 0.05的显著性水平上进行评估。作者在计算事后两两比较时使用了Bonferroni校正临界值。数据分为四类：描述性统计、按标记表面积比较指标、指标厚度和可重复性。
指标各不相同，即使使用方式相同，其标记也可能不可重复。需要进一步研究，同时也需要制定指标测量标准。
指标用于确定咬合不协调并建立咬合协调。由于标记的准确性可能受到质疑，标记的解释可能正确，但标记本身的准确性可能会产生误导。
