| 摘要 |
The invention relates to a method for increasing the precision of the components in an impression system for dental prostheses of the type which are permanently anchored in the jaw by means of one or more securing elements (fixtures) implanted in the jawbone. Each one of the securing elements is provided with a distance member (2) whose upper part protrudes above the palatal arch and on which the finished dental bridge/dental prosthesis is then anchored via a so-called gold cylinder. The system includes impression components in the form of impression tops (1) and distance dummies (9) with continuous guide holes (5) and stop members (6) for a guide pin (4) which, during fixing of the components, is guided through the respective guide hole and engages with the stop members (6) of the respective impression component. That part of the guide pin (4) which interacts with the stop members (6) of the guide holes (5) of the respective impression component (1, 9) has a conical stop surface (11), while the stop members form plane surfaces and guide edges (6', 6''). By means of the design of the guide pin, the components are centred and the precision is improved in existing impression systems. <IMAGE> |
