Division of Clinical Dentistry, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia.
Department of Orthodontics, Faculty of Dentistry, MAHSA University, Kuala Lumpur, Malaysia.
J Prosthodont. 2018 Mar;27(3):314-316. doi: 10.1111/jopr.12491. Epub 2016 Jun 22.
Accurate planning for the framework design of removable partial dentures requires careful analysis of the diagnostic cast with a dental surveyor to determine the optimal path of placement. Some techniques described in the literature are helpful in reorienting the same cast on the surveyor, including the tripod marking method; however, there is a possibility of introducing human errors during marking and repositioning of the tripod points on to the different casts at the same location. Other techniques, which do not require markings on the cast to reorient different casts of the same patient, need specific devices or trays. This article suggests the direct use of a putty-elastomeric orientation index that can be preserved and used multiple times while reorienting different casts of the same patients at various laboratory steps. A putty elastomeric impression material is mixed and adapted on to the diagnostic cast, covering key teeth areas of the cast and incorporating the analyzing rod of the surveyor. Thus there is no need to use a special device or the tray to reorient different casts.
为可摘局部义齿的框架设计进行准确的规划，需要使用牙科测量仪仔细分析诊断模型，以确定最佳的放置路径。文献中描述的一些技术有助于在测量仪上重新定位相同的模型，包括三脚架标记法；然而，在标记和重新定位三脚架点到同一位置的不同模型时，存在引入人为误差的可能性。其他不需要在模型上标记即可重新定位同一患者的不同模型的技术需要特定的设备或托盘。本文建议直接使用橡皮泥弹性定向指数，在不同的实验室步骤中重新定位同一患者的不同模型时，可以多次保存和使用。将糊剂弹性印模材料混合并适应于诊断模型，覆盖模型的关键牙齿区域，并包含测量仪的分析杆。因此，无需使用特殊设备或托盘来重新定位不同的模型。
