An Experimental Approach to Evaluate the Correspondence Between Wear Facet Position and Occlusal Movements
An Experimental Approach to Evaluate the Correspondence Between Wear Facet Position and Occlusal Movements
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DOI：
10.1002/ar.22440
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发表时间：
2012-05-01
影响因子：
2
通讯作者：
Benazzi, Stefano
中科院分区：
文献类型：
--
作者：
Kullmer, Ottmar;Schulz, Dieter;Benazzi, Stefano
牙齿磨损面的位置取决于牙冠形态、拮抗关系和咬合运动。特定运动方向和磨损面位置之间的对应关系在体内很难评估，也从未在实验中进行过测试。一项实验分析进行了提供证据，明确咬合运动负责磨损面空间位置。将未磨损的现代人类假磨牙石复制品安装在物理牙关节器中，并将上牙弓与下牙弓相摩擦以创建磨损面模式。通过三种不同的髁盒设置，对缓解引导运动进行顺序约束：(1)使用基于经验的矢状髁倾角平均值、侧向前突、Benett角和横向髁倾角；(2)增加纯后缩和即时侧移动作；(3)后缩和即刻侧移增加。最后，对上、下第一磨牙进行表面扫描，并对四个磨损阶段的宏观磨损面进行量化。结果表明，磨损面模式被创建类似于什么是看到的人类磨牙在体内咬合。有些方面只有在特定的运动方向被执行时才会发展。因此，我们认为对磨损小面模式的分析对于重建个体咬合运动是有用的。这些信息不仅可以用于指导冠状浮雕和牙弓的可重复性功能重建，还可以用于推断颌骨运动，例如，当在古生物学背景下发现孤立的灵长类动物牙齿时。Anat Rec, 2012。(c) 2012 Wiley期刊有限公司
The position of dental wear facets depends on crown morphology, antagonistic relation, and occlusal movements. The correspondence between specific directions of movements and the position of wear facets cannot be easily evaluated in vivo and has never been tested experimentally. An experimental analysis was carried out to provide evidence that explicit occlusal movements are responsible for the spatial position of wears facets. Unworn dental stone replicas of modern human prosthetic molar were mounted in a physical dental articulator, and the upper dental arch was ground against the lowers to create a wear facet pattern. The relief guided movements were constrained sequentially by means of three different condyle box setups: (1) experienced-based mean values for sagittal condyle inclination, lateroretrusion, Benett angle, and transversal condyle inclination were used; (2) pure retrusion and immediate side shift movements were added; (3) retrusion and immediate side shift were increased. Finally, the upper and lower first molars were surface scanned and macrowear facets were quantified in four wear stages. The results show that a wear facet pattern was created similar to what is seen on human molars in vivo occlusion. Some facets only developed if specific directions of movement were carried out. Therefore, we posit that an analysis of wear facet patterns is useful in recreating the individual occlusal movements. This information can be used not only to guide reproducible functional reconstructions of crown relief and dental arches but also to deduce jaw movements when, for example, isolated primate teeth are discovered in paleontological contexts. Anat Rec, 2012. (c) 2012 Wiley Periodicals, Inc.