Implant deformation and implant-abutment fracture resistance after standardized artificial aging: An in vitro study.
Implant deformation and implant-abutment fracture resistance after standardized artificial aging: An in vitro study.
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DOI：
10.1111/cid.13157
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发表时间：
2022-11
影响因子：
3.6
通讯作者：
Zhai Zhihao;N. Tamaki;Chen Yuming;Watanabe Shota;Matsuoka Takashi;Ishigaki Shoichi
中科院分区：
文献类型：
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作者：
Zhai Zhihao;N. Tamaki;Chen Yuming;Watanabe Shota;Matsuoka Takashi;Ishigaki Shoichi
背景和目的氧化锆基台已广泛应用于临床种植实践。氧化锆独特的机械性能可能会显著影响种植体治疗的长期预后。本研究的目的是研究基台材料对两种直径的内圆锥连接种植体-基台复合体在标准化人工老化后的种植体变形和抗折强度的影响。材料与方法将30个原始基台（一体式钛基台、一体式氧化锆基台、氧化锆基台与合金基台）连接到内圆锥连接种植体上，并进行标准化人工老化，包括热循环和机械循环载荷。在老化前后对种植体进行微计算机断层扫描（μCT）。3-根据μCT扫描生成植入体的三维图像，并在老化前后对齐，以计算体积变形量。最后，使用机械静态加载试验对存活的老化和30个全新的样本进行抗断裂性测量。结果所有试件均经人工老化后存活。在常规组中未发现植入物变形的显著差异（p = 0.095）。在窄型组中，一件式氧化锆组的变形显著较少（p 0.05）。对于两种直径，一体式氧化锆基台的强度均显著低于其他两种材料（p < 0.0001）。结论在常规直径系统中，基台材料对模拟长期口腔使用后的力学性能退化无显著影响。窄直径一件式氧化锆基台的力学性能不同于其他两种材料。为获得最佳性能，应仅在前部区域采用一体式氧化锆基台。
BACKGROUND AND PURPOSE Zirconia abutments have been widely adopted in clinical implant practice. The unique mechanical properties of zirconia may significantly affect the long-term prognosis of implant treatments. The purpose of this study was to investigate the influence of abutment material on implant deformation and fracture resistance of internal conical connection implant-abutment complexes of two diameters after standardized artificial aging. MATERIALS AND METHODS Thirty original abutments (one-piece titanium, one-piece zirconia, zirconia with alloy base) with two diameters (regular, narrow) were connected to internal conical connection implants and subjected to a standardized artificial aging process consisting of thermal cycling and mechanical cyclic loading. Microcomputed tomography (μCT) scans of implant bodies were performed before and after aging. 3-dimensional images of implant bodies were generated from the μCT scans and aligned for before and after aging to calculate the volumetric deformation amount. Finally, fracture resistance was measured using a mechanical static loading test for the surviving aged and 30 brand-new specimens. RESULTS All specimens survived artificial aging. No significant difference in implant deformation was found in the regular groups (p = 0.095). In narrow groups, the one-piece zirconia group showed significantly less deformation (p 0.05). One-piece zirconia abutments showed significantly lower strength than the other two materials for both diameters (p < 0.0001). CONCLUSIONS In the regular diameter system, abutment material had no significant influence on the tested mechanical property degradation after simulated long-term oral use. The mechanical performance of narrow diameter one-piece zirconia abutments differed from the other two materials. For optimal performance, one-piece zirconia abutments should be adopted only in anterior regions.