Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Retentive Force of Adjustable Dental Impression Trays with Different Synthetic Resin Materials

합성수지 재료에 따른 가변형 치과 인상용 트레이의 유지력에 관한 연구

  • Lee, In-Seob (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Lee, jin-Han (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Kim, Yu-Lee (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
  • Dong, Jin-Keun (Department of Prosthodontics, School of Dentistry, Wonkwang University)
  • 이인섭 (원광대학교 치과대학 보철학교실) ;
  • 이진한 (원광대학교 치과대학 보철학교실) ;
  • 김유리 (원광대학교 치과대학 보철학교실) ;
  • 동진근 (원광대학교 치과대학 보철학교실)
  • Published : 2006.03.30
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Abstract

The adjustable dental impression trays were made for being adjusted their width automatically along the width of patient's dental arch. The purpose of this study was to investigate the retentive force of adjustable dental impression trays made of different synthetic resin materials. Three pairs of adjustable trays were made of ABS(acrylonitrile butadiene styrene) synthetic resin, polyurethane synthetic resin and polycarbonate synthetic resin with a hole and without a rim on the border area of them. The experiment was done with the horse-shoe shaped metal plate to pull out the set impression body from the tray jig which was made for holding the tray on the lower part of Universal Testing Machine(UTM, Zwick Z020, Zwick Co., Germany). After the alginate impression in the tray was allowed to set four minutes, a tensile force was applied at right angles to the tray which had been previously seated on the jig. The force was applied to measure a maximum force by use of UTM at a constant strain rate 100mm per minute. The results obtained in this study were as follows : 1. The upper trays were showed higher retentive force than lower trays in three tray materials. 2. There was no significant difference in the retentive force of the tray materials(p>0.05).

Keywords

Acknowledgement

Supported by : 원광대학교

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