Watanabe Shota, Nakano Tamaki, Ono Shinji, Yamanishi Yasufumi, Matsuoka Takashi, Ishigaki Shoichi
Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
Materials (Basel). 2022 Jan 5;15(1):364. doi: 10.3390/ma15010364.
Dental implants with tapered conical connections are often combined with zirconia abutments for esthetics; however, the effect of the titanium base on the implant components remains unclear. This study evaluated the effects of a titanium base on the fracture resistance of zirconia abutments and damage to the tapered conical connection implants. Zirconia (Z) and titanium base zirconia (ZT) abutments were fastened to Nobel Biocare (NB) implants and Straumann (ST) implants and subjected to static load testing according to ISO 14801:2016. The experiments were performed with 3 mm of the platform exposed (P3) and no platform exposed (P0). The fracture loads were statistically greater in the titanium base abutments than the zirconia abutments for the NB and ST specimens in the P0 condition. In the P3 condition of the ST specimens, the deformation volume of the ZT group was significantly greater than the Z group. The titanium base increased the fracture resistance of the zirconia abutments. Additionally, the titanium base caused more deformation in the P3 condition. The implant joint design may also affect the amount of damage to the implants when under a load. The mechanical properties of the abutment should be considered when selecting a clinical design.
具有锥形连接的牙种植体通常与氧化锆基台结合使用以达到美观效果；然而，钛基底对种植体组件的影响仍不明确。本研究评估了钛基底对氧化锆基台抗断裂性以及对锥形连接种植体损伤的影响。将氧化锆（Z）基台和钛基底氧化锆（ZT）基台固定到诺贝尔生物科技（NB）种植体和士卓曼（ST）种植体上，并根据ISO 14801:2016进行静载测试。实验在暴露3毫米平台（P3）和未暴露平台（P0）的情况下进行。在P0条件下，NB和ST样本中，钛基底基台的断裂载荷在统计学上高于氧化锆基台。在ST样本的P3条件下，ZT组的变形量显著大于Z组。钛基底提高了氧化锆基台的抗断裂性。此外，在P3条件下钛基底导致了更多变形。种植体的连接设计在加载时也可能影响种植体的损伤程度。选择临床设计时应考虑基台的机械性能。
