Researcher, Department of Buccofacial Prosthesis, Faculty of Odontology, University Complutense of Madrid, Madrid, Spain.
Researcher, Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain.
J Prosthet Dent. 2021 Jul;126(1):94.e1-94.e9. doi: 10.1016/j.prosdent.2021.03.020. Epub 2021 May 15.
Restoring implants with nonoriginal abutments is common. However, studies that evaluated compatible abutments with long-term fatigue performance are lacking.
The purpose of this in vitro study was to assess the internal fit and the cyclic fatigue life after artificial aging of 3 implant-abutment configurations restored with 1 original and 2 compatible nonoriginal cast-to-gold abutments.
Forty-eight original internal hexagon connection implants were connected to 3 different brands of abutments (n=16): 1 original to the implant system and the other 2 with nonoriginal abutments. Internal fit and the percentage of surface with tight contact were assessed by scanning electron microscopy in 12 cross-sectioned specimens (n=4) at 3 different areas (platform, internal, and screw). Thirty-six implant-abutment-crown specimens (n=12) were immersed in artificial saliva and thermocycled for 10 000 cycles between 5 °C and 55 °C. Subsequently, a cyclic load test, as per International Organization for Standardization (ISO) Standard 14 801, was completed in a universal testing machine at 2 Hz in air.
The original abutments presented the best fit and highest percentage of tight contact in the internal areas. In addition, the original abutments showed the lower cyclic fatigue strength degradation and the highest long-term success.
Occlusal loads are transferred more homogenously through the system when original abutments are used because of the better fit between the internal components, leading to increased fatigue resistance.
使用非原装基台修复种植体很常见。然而，缺乏评估具有长期疲劳性能的兼容基台的研究。
本体外研究的目的是评估 3 种种植体-基台修复体的内部适合性和人工老化后的循环疲劳寿命，这些修复体使用 1 个原装和 2 个兼容的非原装铸造-金基台。
将 48 个原始内六角连接种植体与 3 个不同品牌的基台连接（n=16）：1 个原装和另外 2 个非原装基台。通过扫描电子显微镜在 12 个横截面样本（n=4）的 3 个不同区域（平台、内部和螺丝）评估内部适合性和紧密接触表面的百分比。将 36 个种植体-基台-冠修复体样本（n=12）浸入人工唾液中，在 5°C 和 55°C 之间进行 10000 次热循环。随后，根据国际标准化组织（ISO）标准 14801，在空气以 2Hz 的频率在万能试验机上完成循环负荷测试。
原装基台在内部区域具有最佳的适合性和最高的紧密接触百分比。此外，原装基台显示出较低的循环疲劳强度降解和较高的长期成功率。
由于内部组件之间更好的适合性，当使用原装基台时，咬合负荷更均匀地传递到系统中，从而提高了疲劳阻力。
