Particularities of the prosthetic treatment by using modified dowel - cores in case of small prostheti

Abstract

Particularities of the prosthetic treatment by using modified dowel-cores in case of small prosthetic abutments in side areas The essence of the subject is in using modified dowel-core in order to increase the contact surface with the future prosthetic constmction which will reduce the risk of decementation and increase retention of the construction. For herewith subject-matter research was used the comparison method of analysis. The comparison was acted upon the dimensions of contact surfaces with future prosthetic construction in case of using standard dowel-core and the modified dowel-core with occlusal depression proposed and described in this paper. After calculation it was found that using modified dowel-core total surface increased by approximative 25%, and occlusal surface in comparison with the standard one by 95%. The particularity of modified dowel-core is also presented in clinical case. In dental practice a frequently met problem is that the prosthetic treatment becomes difficult or even impossible because of bad retention connected with insufficient height of the abutment. Such situations lead to decementation of the prosthesis as well as cause insufficient space for ceramic layer. Such complications may be observed in the following cases like: small dental crowns, some vertical dental and dento-alveolar migrations which leads to shifting the occlusal area and tooth lapping by decreasing the height of the crown, in cases of total and subtotal defects of the crown which are followed by migration of antagonists. The proposed method of treatment using modified dowel-cores (with the occlusal depression) can compensate the insufficiency of the surface and height of the abutments by increasing both the retention zone and the contact surface with the future prosthetic construction. In conclusion we underline insufficient dimensions of prosthetic abutments in different clinical situations create difficulties in prosthetic treatment and often compromise prosthetic construction; - the usage of dowel-cores with occlusal depression increase contact surface and retention with future prosthesis; - due to particularities of this modified dowelcore it is possible to increase the space for ceramic layer; - advantages of using the modified dowelcores prevail its disadvantages, therefore, the herewith proposed method permits to solve the space and surface deficiency accrued in the prosthetic treatment of the special clinical situations as described, without loosening the root support.