The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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THE EFFECT OF VARIOUS FINISH LINE PREPARATIONS ON THE MARGINAL SEAL OF FULL CROWN PREPARATIONS

전부주조금관 치경부 변연의 형태가 치경부 변연적합에 미치는 영향

  • Kim, Soon Young (Department of Prosthodontics, School of Dentistry, Kyungpook National University) ;
  • Lee, Seok Hyeon (Department of Prosthodontics, School of Dentistry, Kyungpook National University) ;
  • Jo, Kwang Hun (Department of Prosthodontics, School of Dentistry, Kyungpook National University)
  • 김순영 (경부대학교 치과대학 보철학교실) ;
  • 이석현 (경부대학교 치과대학 보철학교실) ;
  • 조광헌 (경부대학교 치과대학 보철학교실)
  • Published : 1990.12.01
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Abstract

The purpose of the study was to correlate margin design(chamfer, shoulder, shoulder with a $45^{\circ}$ bevel. with the seating and sealing of cemented full cast crowns under standardized simulated clinical conditions. Wax patterns were made with milled stainless-steel dies and rings, and were invested, burnt out, and cast. The full cast crowns were comented on individual resin dies, and a gradually diminishing load(45kg to 25kg. was applied over a 10-minute period. The specimens were sectioned centrally with a low speed diamond saw and examined with light microscope. The results were as follows : 1. Chamfer preparations demonstrated it was the best marginal seal, followed in order by the shoulder with a $45^{\circ}$ bevel, and by the shoulder(p<.05). 2. Chamfer preparations demonstrated it was the best occlusal seating, followed in order by the shoulder, and by the shoulder with a $45^{\circ}$ bevel(p<.05).

현재 임상에서 사용되고 있는 니켈-크롬합금(Washiloy Soft, Kamemizu Chemical Inc. Ltd., Japan)을 이용하여 Chamfer, shoulder, shoulder with a $45^{\circ}$ bevel의 각 치경부 변연의 형태에 따른 시멘트층 피막후경을 교합면 및 치경부에서 측정, 비교하여 다음과 같은 결론을 얻었다. 금관의 교합면 장착정도는 chamfer가 가장 우수하고, 다음으로는 shoulder, shoulder with a $45^{\circ}$ bevel의 순이며, 이들 간에는 유의성 있는 차이를 나타내었다(p<.05). 금관의 치경부 적합도는 chamfer가 가장 우수하고, 다음으로 shoulder with a $45^{\circ}$ vevel, shoulder의 순이며, 이들 간에는 유의성 있는 차이를 나타내었다(p<.05).

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