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골유착성 임플랜트지지 Overdenture 에 관한 임상적 연구
계기성,추영호,최아영 朝鮮大學校 口腔生物學硏究所 1996 口腔生物學硏究 Vol.20 No.2
It is easy relatively to establish the treatment panning because the implant placement can be possible to the location for not only the esthetic aspect but also the proper retention and support using the implant in the case of the overdenture procedure. If the accurate diagnosis, the detailed planning, the careful surgical operation and the through oral hygiene maintenance of the patient is established, it can be assumed that the prognosis is favorable and the high success rate is expected. The firm understanding of the concept of occlusion is needed for the longterm success of the osseointegrated implant prosthetics. The occlusion recommended for the overdenture is the fully balanced occlusion in relation to these clinical cases, and in some cases the lingualized occlusion can be recommended also to provide the lateral force as less as possible. The implant supported overdentures using the O-ring, bar, and magnet attachment were fabricated with the good clinical results such as the improved retention, the esthetics, and the stability in patients with overdentures in these clinical cases. Better selection of the attachment system in the overdenture supported by osseo-integrated fixtures must be established through the exact understanding of the bio-mechanics about the implant, the maintenance of the oral hygiene, the meticuluous consideration of the different oral environment existed in the every patient. It must be kept in mind that the establishment of proper jaw relationships, the occlusion, the esthetics, and the function depend on the success rate.
계기성,이남훈,추영호 朝鮮大學校 口腔生物學硏究所 1998 口腔生物學硏究 Vol.22 No.1
Free end removable partial denture always rotates around certain axis when functional load in applied. It the forces, which occurs during the functional load is applied, are not controled within physiologically permissible level, the deformation of retainers and harmful effect to the abutment is occurred. Free end removable partial denture must satisfy the following basic principle at the view point of biomechanics and therefore the satisfactory results will be obtained when the routine check up is performed and the patient maintains the oral condition properly. 1. The effectiveness of the direct retainer is increased when the indirect retainer is located anterior to the fulcrum axis, which is the line drawn between the retentive tips of the clasp. 2. The effectiveness of the direct retainer is increased as the guiding planes are properly prepared, contract with guiding plates, and the path of insertion and removal is performed definitely, and also the guiding platers rotates and should not apply the binding force to the abutment as the proper space is provided bellow the guiding plane when the functional movement is applied. 3. If possible, the rest of the direct retainer must be located to the mesial occlusal surface of the abutment, and the retentive portion of the direct retainer must be designed posterior to the axis of the rotation to release the direct retainer from the tooth when the functional movement is applied, and also if the retentive portion is located anterior to the axis of the rotation, the clasp with minimal undercut or wrought wire clasp with good flexibility should be selected.