부산대학교 도서관

The purpose of this study was to determine statistical information concerning the crowns and the fixed partial dentures (total number, types and rate of crowns, number of vital or non-vital abutment teeth, etc.) made by the staff of the First Department of Prosthodontics, School of Dentistry, Showa University from April 1990 to March 1991.The following results were obtained : (1) The total number of crowns and fixed partial dentures produced was 1149 ; among them 966 pieces (84%) were crown, and the other 183 pieces (16%) were fixed partial dentures.(2) Most of the crowns were full cast crowns (496 pieces, 51. 3%); the second most commonly produced was the porcelain fused to metal crown (232 pieces, 24%).(3) For the anterior teeth, there were as many porcelain fused to metal crowns used as there were jacket crowns. For the premolar teeth, there were twice as many full cast crowns as there were porcelain fused to metal crown. The full cast crown was used for almost all of the molar teeth.(4) With regard to the fixed partial dentures, the mandibular posterior teeth were the most frequently treated ; next were the maxillary posterior teeth ; and the least frequently treated were the mandibular anterior teeth.(5) Concerning the abutment teeth of the fixed partial dentures, 70% were non-vital teeth and 30% were vital.