[Statistical analysis of the fabrication of fixed and removable partial dentures (in 2002)].

A statistical survey based on laboratory records was performed on the number of fixed partial dentures and removable partial dentures fabricated at the dental hospital of Tokyo Medical and Dental University from April 1 to September 30, 2002. A comparison was also performed with a previous survey that had been carried out in 1997 to detect any change and possible alternations in the near future. From the findings of this statistical survey, the conclusions were as follows: 1.

[A statistical survey of the fabrication of single restorations (in 2002)].

A statistical survey based on laboratory records was carried out to determine the state of fabrication of restorations at the dental hospital of Tokyo Medical and Dental University during the six month period from April 1 to September 30, 2002. A comparison was also done with a previous survey that had been carried out in 1986 and 1997 to detect the possible change and alternations in the near future. From the findings of this survey, the following conclusions can be drawn.

[Measurement of surface strains in crowns and 3-unit bridges during function].

The purpose of this study was to determine the surface strain distribution of a crown and bridge, and to compare the biomechanical behavior of a crown and bridge. The complete crown and 3-unit bridge, whose abutments were the second premolar and the second molar, for three cases of first molar deficit in the mandible, were produced, and the surface strain of prostheses under static loading was measured with strain gauges. When a load was applied, although only a small strain was observed near the margin of the crown, a comparatively large tensile strain was observed near the deficit side margin of the distal retainer on the bridge.