European Synchrotron Radiation Facility, Grenoble, France.
J Synchrotron Radiat. 2010 Mar;17(2):289-94. doi: 10.1107/S0909049510001834. Epub 2010 Feb 3.
Micro-gap formation at the implant-abutment interface of two-piece dental implants was investigated in vitro using high-resolution radiography in combination with hard X-ray synchrotron radiation. Images were taken with the specimen under different mechanical loads of up to 100 N. The aim of this investigation was to prove the existence of micro-gaps for implants with conical connections as well as to study the mechanical behavior of the mating zone of conical implants during loading. Synchrotron-based radiography in comparison with classical laboratory radiography yields high spatial resolution in combination with high contrast even when exploiting micro-sized features in highly attenuating objects. The first illustration of a micro-gap which was previously indistinguishable by laboratory methods underlines that the complex micro-mechanical behavior of implants requires further in vitro investigations where synchrotron-based micro-imaging is one of the prerequisites.
采用高分辨率射线照相术结合硬 X 射线同步辐射，对两段式牙科植入物的植入物-基台界面微间隙的形成进行了体外研究。在高达 100N 的不同机械载荷下对标本进行了成像。本研究的目的是证明具有锥形连接的植入物存在微间隙，并研究锥形植入物配合区域在加载过程中的机械行为。与传统的实验室射线照相术相比，基于同步加速器的射线照相术具有高空间分辨率和高对比度，即使在高度衰减的物体中利用微尺寸特征也是如此。通过实验室方法以前无法区分的微间隙的首次说明强调了植入物的复杂微机械行为需要进一步的体外研究，其中基于同步加速器的微成像就是前提之一。
