Tolerance Measurements on Internal- and External-Hexagon Implants
Tolerance Measurements on Internal- and External-Hexagon Implants
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DOI：
10.11607/jomi.3242
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发表时间：
2014-07-01
影响因子：
2
通讯作者：
Wennerberg, Ann
中科院分区：
文献类型：
--
作者：
Braian, Michael;De Bruyn, Hugo;Wennerberg, Ann
目的：测量制造商交付后内、外六角种植体和类似物与相应部件之间界面的水平加工公差。这些值可能是一个有价值的工具，用于评估制造，加工和磨损造成的失配增加。材料与方法：研究了7个种植体和7个替代体，它们具有外部和内部六边形连接（Biomet 3 i），带有相应的预制金圆柱体和金螺钉、预制圆柱形塑料圆柱体和实验室螺钉。手动和数字测量来自外部和内部组的一组组件。将来自测试对象的测量结果与来自虚拟模型的相同测量结果进行比较，以获得阈值。然后使用虚拟模型来获得最佳定向切割。结果如下：外部种植体上可浇铸塑料基台的水平加工公差为12 +/- 89 μ m，内部种植体的水平加工公差为86 +/- 47 μ m。外部种植体的预制金基台的公差测量值为44 +/- 9 μ m，内部种植体的公差测量值为58 +/- 28 μ m。结论：具有金属部件的组显示出最小的公差，外部组< 50 μ m，内部组< 90 μ m。预制塑料圆筒组的范围从外部连接的< 100 μ m到内部连接的< 130 μ m。
Purpose: To measure the horizontal machining tolerances of the interface between internal-and external-hexagon implants and analogs with corresponding components after delivery from the manufacturer. These values may be a valuable tool for evaluating increasing misfit caused by fabrication, processing, and wear. Materials and Methods: Seven implants and seven analogs with external-and internal-hexagon connections (Biomet 3i) with corresponding prefabricated gold cylinders and gold screws, prefabricated cylindric plastic cylinders, and laboratory screws were studied. One set of components from the external and internal groups was measured manually and digitally. Measurements from the test subjects were compared with identical measurements from the virtual model to obtain threshold values. The virtual model was then used to obtain optimally oriented cuts. Results: The horizontal machining tolerances for castable plastic abutments on external implants were 12 +/- 89 mu m, and for internal implants they were 86 +/- 47 mu m. Tolerance measurements on prefabricated gold abutments for external implants were 44 +/- 9 mu m, and for internal implants they were 58 +/- 28 mu m. Conclusion: The groups with metallic components showed the smallest tolerance at < 50 mu m for the external group and < 90 mu m for the internal group. The prefabricated plastic cylinder groups ranged from < 100 mu m for external and < 130 mu m for internal connection.