A statistical study was made of 514 crowns and 107 bridges which had been fabricated for 318 patients at the Prosthetic Clinic of Matsumoto Dental College from January through December 1977. Some of the results were as follows: 1) Of patients, 47.17% were males and 52.83% were females; and 2) 89.63% belonged to between 20-year-old and 50-year-old groups. 3) Crowns for the lower premalor segment were the most in number among the six segments. 4) Of crowns, 71.40% were fabricated as full cast crowns; and 5) 17.51% were fabricated for vital teeth. 6) Of bridges, 84.11% were fabricated as three-unit bridges; and 7) 88.79% were fabricated as one-pontic bridges. 8) Bridge retainers for the premolar segment were the most in number among the six segments. 9) Of bridge retainers, 74.12% were fabricated as full cast crowns; and 10) 66.23% were fabricated for vital teeth. 11) Of pontics, 37.70% were replaced for the lower molar segment. 12) In the comparison with the observation in 1974, it was shown that number of patients increased by about 2.7 times. 13) The number of crowns increased by about 2.2 times that of 1974. 14) The number of bridges showed an increase of about 2.3 times campared with the study in 1974.
昭和52年における冠・架工義歯補綴に関する統計的観察
