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시멘트의 종류에 따른 포스트의 인장강도 및 제거의 난이도에 관한 연구

Other Titles
 THE EFFECT OF VARIOUS CEMENTS ON THE TENSILE STRENGTH OF A POST AND DIFFICULTIES OF ULTRASONIC POST REMOVAL 
Authors
 박정원  ;  노병덕  ;  이정석 
Citation
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.22(1) : 181-192, 1997-01 
Journal Title
Journal of Korean Academy of Operative Dentistry(대한치과보존학회지)
ISSN
 1225-0864 
Issue Date
1997-01
Abstract
The difficulty of endodontic retreatment depends on various factors and it is affected by retention of post. In this experiment, root canal therapy was done in extracted human teeth and cut into 10mm length from the root apex, and then cemented by zinc phosphate cement, Vitremer(R)(glass ionomer) luting cement and Panavia 21(R)(resin cement). Post preparation was done by #4 Parapost drill at 6mm length and cement was inserted by lentulo spiral. After 24 hours, tensile bond strength, post removal time was measured after the ultrasonic application and the separation site was measured. The following results were obtained. 1. In measuring tensile bond strength, there is no statistical difference between zinc phosphate cement and Panavia 21(R), but Vitremer(R) showed lower value compared with those two cements. (p<0.001) 2. When the post removal time was measured after ultrasonic application, significant different value in order of Panavia 21(R), zinc phosphate cement and Vitremer(R) was shown. (p<0.001) 3. As a result of examining the separating site of each cement, all 16 of zinc phosphate cement group showed the fracture site between cement and post, Vitremer(R) was 13/16, and Panavia 2(R) was 8/16. In case of tooth restoration using Parapost, the use of Panavia 21 showed good retention property than Vitremer(R), but when retreatment is needed the difficulty of post removal will be increased.
Files in This Item:
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Park, Jeong Won(박정원) ORCID logo https://orcid.org/0000-0002-2517-8150
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/183525
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