A Preliminary Study on the Fitness of Adjustable Dental Impression Trays

가변형 치과 인상용 트레이의 적합도에 관한 예비연구

  • Kim, Min-Jeong (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Oh, Sang-Chun (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Dong, Jin-Keun (Department of Prosthodontics, School of Dentistry, Wonkwang University)
  • 김민정 (원광대학교 치과대학 치과보철학교실) ;
  • 오상천 (원광대학교 치과대학 치과보철학교실) ;
  • 동진근 (원광대학교 치과대학 치과보철학교실)
  • Published : 2005.06.30


This study was designed to investigate the fitness of adjustable dental impression trays. The size and shape of these trays were designed from the results of the dental arch size of Korean adults. Tray samples were made by CAD-CAM working. A hundred dental students(male:50, female:50) were selected for taking irreversible hydrocolloid impression using these trays. The author measured the width and length of impression material on the several measuring points. The results obtained were as follows : 1. Uniform impression material thickness was achieved by controlling the width of the tray using stops and beveled guides. 2. In the upper tray, the impression material thickness was measured to be rather great showing thickness of the labial vestibule 8.3 mm and the midpalatal part 8.6 mm. 3. In the lower tray, length of the impression material of the labial vestibule of first, second premolar contact point was 7.8 mm, and thickness of the lingual part of premolars(1.8 mm) and molars(1.9 mm) showed small values. 4. In the lower tray, the impression material thickness of the buccal shelf area(0.2 mm) and the retromolar pad area(0.6 mm) was measured to be too small.



Supported by : 보건복지부


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