This study aims to applicate the Biometric impression trays for Japanese edentulous patients. A hundred (fifity males and fifity females) Japanese bucco-lingual breadth (BLB) s of the dentulous alveolar process were measured on maxillary study casts by the three dimensional coordinate measuring machine.
Results:
1. Average measurements (mm) and standard deviations (mm) were as follows. Central incisor; 5.7±1.15, canine 7.5±1.41, first premolar 10.7±1.07, second premolar 11.4±1.37, first molar 13.4±1.25 and second molar 12.3±1.33.
2. Japanese average measurements were 0.5-1.0mm smaller in incisor and canine region, but 0.6-0.8 larger in premolar and molar region as compared with figures of Scottish that Watt had reported.
3. Biometric tray of which design is based on the average BLB measurements will become a concrete guide to the breadth of the flange of complete upper dentures for Japanese.
