(1/69) Corrosion resistance of the Pt-Fe-Nb magnets for dental-casting.
Magnetic attachments have been used in clinical dental practice, but there is some difficulties associated with removable bridges. One possible solution is to make whole bridges of Pt-Fe magnet alloys and its abutment out of magnetic stainless steel by casting. In terms of castability and magnetic properties, the promising composition of the Pt-Fe-Nb magnet alloy is Pt-30.0 mass% Fe-0.6 mass% Nb and Pt-30.0 mass% Fe-0.5 mass% Nb-0.03 mass% Si. In the present study, the corrosion resistance of these alloys was investigated based on the elusion test, electrochemical behavior and surface characterization by EPMA analysis. The released elements from the Pt-Fe-Nb magnets were mainly Fe ions in quantities similar to that of stainless steel for biomedical use, and the Pt-Fe-Nb magnet alloy, the Pt-Fe-Nb-Si magnet alloy and platinum resembled each other in electrochemical behavior. The present findings suggest, that the Pt-Fe-Nb magnet alloy provides excellent corrosion resistance and has important clinical dental applications. (+info)
(2/69) Indirect retention.
This article explains the mechanism of indirect retention for RPDs and discusses the factors which determine its effectiveness. Examples are given of designs which incorporate indirect retention. (+info)
This article describes the types and functions of connectors for RPDS. It also considers the relative merits and limitations of these connectors. (+info)
(4/69) A three-part bilateral swinglock design denture revisited.
This case was first reported by one of the authors in 1987, subsequent to the patient being treated using a combination of a hinge and split pin sectional denture. The same patient attended for review some 14 years later for assessment of this denture at which stage a replacement was made. (+info)
(5/69) Integrating posterior crowns with partial dentures.
This article outlines those considerations which are important in integrating posterior crowns with partial dentures. Planning the support and retention of the denture prior to crown construction will enhance patient treatment. Modification of the crown preparation to incorporate rest seats, retentive areas, guide planes and a planned path of insertion may be necessary. (+info)
(6/69) Good occlusal practice in removable prosthodontics.
The loss of teeth may result in patients experiencing problems of a functional, aesthetic and psychological nature. This section addresses the very important subject of occlusal considerations for partial and complete dentures. The occlusion is particularly important given the bearing that occlusal factors have, especially on edentulous patients. (+info)
(7/69) A technique for using maxillary anterior soft-tissue undercuts in denture placement: a case report.
Restoring a large edentulous space in the anterior maxilla presents many challenges, including how to utilize and manage a deep anterior soft tissue undercut. In the case reported here, a partial denture was constructed that incorporated a semi-rigid exterior flange and a soft liner to help the denture to engage the depth of the undercut. The denture was placed after extraction of the anterior teeth, and there was very little postoperative tissue trauma. With this combination of materials, known as "triple lamination", the prosthesis was able to engage the soft-tissue undercut, the undercut was actively involved in retaining the prosthesis, the denture could be placed immediately, and the prosthesis was very comfortable. Triple lamination should be considered when a deep soft-tissue undercut must be engaged to ensure retention of a prosthesis. (+info)
(8/69) Crowns and other extra-coronal restorations: resin-bonded metal restorations.
Resin-bonded metal restorations is the final part of the series. Cast metal restorations which rely on adhesion for attachment to teeth are attractive because of their potential to be much more conservative of tooth structure than conventional crowns which rely on preparation features providing macromechanical resistance and retention. (+info)