This study was carried out 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.) which were placed in the outpatients in the First Department of Prosthodontics at Showa University Dental Hospital from April 1992 to March 1993. The following results were obtained : (1) The total number of crowns and fixed partial dentures produced were 1,256 ; among them, crowns totaled 1,074 (85.5%) and the fixed partial dentures, 182 (14.5%). (2) Most of the crowns were full cast crowns (584, 54.4%); second were porcelain fused to metal crowns (288, 26.8%). The resin faced cast crowns, 0 cases last year, steeply increased to 110 (10.2%). (3) The porcelain fused to metal crowns for the anterior teeth and the full cast crowns for premolar teeth occupied more than 50%, respectively. The full cast crowns for the molar teeth occupied approximately 90%. (4) Fixed partial dentures lacated in the posterior region were about 60%. Those in the anterior and the antero-posterior regions were about 20% each. (5) With regard to the relationship between the missing teeth and the abutment teeth of the fixed partial denture, the three-unit fixed partial dentures (one missing tooth with two abutment teeth) were most frequently treated in all regions. (6) The crowns made by the insurance dental service were 66.1% and the fixed partial dentures were 61.0%. (7) Concerning the abutment teeth of the crowns, non-vital teeth were 88.5%; non-vital teeth of the fixed partial dentures were 70.1%.
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