Earticle

초록

영어

Gypsum products are used for the preparation of stone casts of oral and maxillofacial structures and as important adjuncts to dental laboratory operations involved in the production of dental prosthesis. Accuracy and dimensional stability over time are properties of concern in fixed prothodontics. Gypsum products used in denstry are a form calcium sulfate hemihydrate and are classified as 1 of 5 types according to International Standard Organization(ISO) 6873.
All die materials exhibit some dimensional change during setting, but expansion and contraction during setting and dimensional changes in response to varations in temperature and the water-powder ratio must be minimal.
Although numerous investigators have studied the properties of die materials, several products have been introduced recently with manufacturer claims of superior dimensional stalility.
The aim of this study was to determine the surface properties using various separating materials of dental gypsum products The results were as follows
1. In the comparison of first and second plaster distances before separation in different separating agent, there was no significant difference except using Trio separating agent.
The interface using Trio separating agent forms like to pores.
2. In the comparison of first and second plaster distances after separation in different separating agent, there was significant difference. The interface of plasters using WD-40, Trio and Vaseline was showed some gaps. Each they were measured at average 7.97 2.07 , 63.09 23.25 , 27.59 4.19 .
3. In the comparison of the surface, the surface of control sample(using none seperating agent) showed irregular properties and the surface using Trio and Vaseline become wrinkled. Specially the surface using Vaseline was showed shiny properties. But the surface using MAGIC SEP, Plaster seperating agent, WD-40 showed regular properties.

목차

Abstract
 Ⅰ. 서론
 Ⅱ. 연구 재료 및 방법
  1. 연구 재료
  2. 시편 준비
  3. 시편 분석
 Ⅲ. 연구 결과
  1. 분리하기 전 계면 특성
  2. 분리한 후 계면 특성
  3. 분리한 후 2차 경석고의 표면특성
 Ⅳ. 고찰
 Ⅴ. 결론
 참고문헌

키워드

저자

• 성환경 [ Hwan-Kyung Sung | 동남보건대학 치기공과 ]
• 이규선 [ Gyu-Sun Lee | 동남보건대학 치기공과 ]
• 황재선 [ Jae-Sun Hwang | 동남보건대학 치기공과 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한치과기공학회지 [THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY]

• 간기

  계간

• pISSN

  1229-3954

• eISSN

  2288-5218

• 수록기간

  1979~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 515 DDC 617