Li Xiao-Na, Mattheos Nikos
Special Clinic, Dalian Stomatological Hospital . Dalian 116021,Liaoning Province, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2018 Aug;27(4):360-364.
The aim of this pilot study was to investigate the morphological micro-features of 3 commercially available implant-abutment joints, using compatible and original prosthetic components and to explore the correlation between the micromorphology and potential functional complications.
Three abutments (one original and two compatibles) were torqued on original Straumann RN implants, according to the manufacturer's instructions. The implant-abutment units were sliced in the microtome and photographed under different magnifications through a scanning electron microscope. Calibration measurements were conducted under magnification corresponding to the area under assessment.
Major dimensional differences were identified between all studied contact areas of the three units. The tight contact in the implant shoulder was similar in all three units, but engagement of the internal connection and, in particular, the anti-rotation elements were seriously compromised in the compatible abutments. One compatible abutment demonstrated compromised engagement of the abutment screw as well.
Compatible abutments can present critical morphological differences from the original ones. The differences in the cross-sectional geometry result in large differences in the overall contact areas, both in terms of quality and quantity which could have serious implications from the long-term stability of the prosthesis.
本初步研究旨在使用兼容和原装修复组件，研究3种市售种植体-基台连接的形态微观特征，并探讨微观形态与潜在功能并发症之间的相关性。
根据制造商的说明，将三个基台（一个原装和两个兼容）拧在原装的士卓曼RN种植体上。将种植体-基台单元在切片机上切片，并通过扫描电子显微镜在不同放大倍数下拍照。在与评估区域相对应的放大倍数下进行校准测量。
在三个单元的所有研究接触区域之间发现了主要尺寸差异。所有三个单元在种植体肩部的紧密接触相似，但兼容基台的内部连接，特别是抗旋转元件的啮合严重受损。一个兼容基台的基台螺钉啮合也受到损害。
兼容基台可能与原装基台存在关键的形态差异。横截面几何形状的差异导致整体接触面积在质量和数量上存在很大差异，这可能对假体的长期稳定性产生严重影响。
