Sewerin I P
Department of Radiology, Royal Dental College Copenhagen, Denmark.
Scand J Dent Res. 1989 Dec;97(6):559-64. doi: 10.1111/j.1600-0722.1989.tb00931.x.
In the treatment with osseointegrated implants ad modum Brånemark a radiographic control of the fixture-abutment connection is recommended. The purpose of the present study was to analyze the possibilities of detecting incomplete connection by radiography using the recommended technique. In an experimental model the influence of film density, orientation of the fixture hexagon, angulation between film plane and fixture axis, leakage width, and partial connection were analyzed. Slits of 0.05 mm were detectable under optimum projection conditions. On the other hand, slits of 0.1 mm were obscured even at deviations of 5 degrees. A number of factors, e.g. low density level and "unfavorable" orientation of the hexagon in relation to the X-ray beam, reduce the possibilities of detecting slits. It is concluded that in clinical cases a demonstration of incomplete fixture-abutment connection by the use of the recommended radiographic technique radiography to some extent is fortuitous, and that radiographic control has certain limitations.
在用骨结合式种植体（如布兰内马克式）进行治疗时，建议对种植体-基台连接进行影像学检查。本研究的目的是分析使用推荐技术通过放射摄影检测不完全连接的可能性。在一个实验模型中，分析了胶片密度、种植体六角形的方向、胶片平面与种植体轴之间的角度、缝隙宽度和部分连接的影响。在最佳投影条件下，0.05毫米的缝隙是可检测到的。另一方面，即使在5度的偏差下，0.1毫米的缝隙也会被遮挡。一些因素，如低密度水平和六角形相对于X射线束的“不利”方向，会降低检测缝隙的可能性。得出的结论是，在临床病例中，使用推荐的放射摄影技术在一定程度上偶然能证明种植体-基台连接不完全，并且放射摄影检查有一定的局限性。
