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首页> 美国卫生研究院文献>International Journal of Oral Science >Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation
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Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation

机译：一种无牙颌牙科铸件和具有下颌关系的蜡咬合轮缘的新型三维复制方法的精度评估

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The article introduces a new method for three-dimensional reproduction of edentulous dental casts, and wax occlusion rims with jaw relation by using a commercial high-speed line laser scanner and reverse engineering software and evaluates the method's accuracy in vitro. The method comprises three main steps: (i) acquisition of the three-dimensional stereolithography data of maxillary and mandibular edentulous dental casts and wax occlusion rims; (ii) acquisition of the three-dimensional stereolithography data of jaw relations; and (iii) registration of these data with the reverse engineering software and completing reconstruction. To evaluate the accuracy of this method, dental casts and wax occlusion rims of 10 edentulous patients were used. The lengths of eight lines between common anatomic landmarks were measured directly on the casts and occlusion rims by using a vernier caliper and on the three-dimensional computerized images by using the software measurement tool. The direct data were considered as the true values. The paired-samples t-test was used for statistical analysis. The mean differences between the direct and the computerized measurements were mostly less than 0.04 mm and were not significant (P>0.05). Statistical significance among 10 patients was assessed using one-way analysis of variance (P<0.05). The result showed that the 10 patients were considered statistically no significant. Therefore, accurate three-dimensional reproduction of the edentulous dental casts, wax occlusion rims, and jaw relations was achieved. The proposed method enables the visualization of occlusion from different views and would help to meet the demand for the computer-aided design of removable complete dentures.
机译：本文介绍了一种新的方法，可通过使用商用高速线激光扫描仪和逆向工程软件来三维还原无牙牙齿铸件和具有下颌关系的蜡咬合环，并在体外评估该方法的准确性。该方法包括三个主要步骤：（i）获取上颌和下颌无牙牙科模型和蜡咬合边缘的三维立体光刻数据； （ii）获取颌骨关系的三维立体光刻数据； （iii）使用逆向工程软件注册这些数据并完成重建。为了评估该方法的准确性，使用了10名无牙患者的铸模和蜡咬合环。使用游标卡尺直接在铸件和咬合边缘上测量普通解剖界标之间的八条线的长度，并使用软件测量工具在三维计算机图像上直接测量。直接数据被认为是真实值。配对样本t检验用于统计分析。直接测量值和计算机测量值之间的平均差异主要是小于0.04mm，并且不显着（P> 0.05）。使用单因素方差分析评估10例患者的统计学显着性（P <0.05）。结果表明，这10例患者被认为没有统计学意义。因此，实现了无牙牙齿模型，蜡咬合边缘和下颌关系的精确三维复制。所提出的方法能够从不同的视角可视化咬合，并有助于满足对可移动全口义齿的计算机辅助设计的需求。

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