抄録
The location and direction of the screw access hall in the upper structures may have great influences on esthetics, occlusal contacts, pronunciation, sensivity of tongue, and the strength of both porcelain and metal. For example, in many cases of anterior restorations, if the direction of fixture implanted corresponds with that of screw access hall, screw access halls locate on labial side of prosthesis. Therefore, the problem of esthetics comes to take place. On the other hand, there is a possibility that screw access halls on the occlusal table prevent from establishing correct tooth contacts. Finally the prognosis of final restorations depends on it.
But altering the location and direction of screw access hall makes it possible to resolve those problems above mentioned. Here we will propose the management of screw access hall for implant laboratory procedure.
