Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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COMPARISON OF BOND STRENGTH OF A FIBER POST CEMENTED WITH VARIOUS RESIN CEMENTS

다양한 레진시멘트로 합착한 섬유포스트의 결합강도 비교

  • Lee, Hyun-A (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
  • Cho, Young-Gon (Department of Conservative Dentistry, College of Dentistry, Chosun University)
  • 이현아 (조선대학교 치과대학 치과보존학 교실) ;
  • 조영곤 (조선대학교 치과대학 치과보존학 교실)
  • Published : 2008.11.30
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Abstract

The purpose of this study was to compare the push-out strength of a fiber post cemented with various resin cements. Newly extracted 36 human mandibular premolars which had single root canal were selected and their crown portions were removed. The root canal was instrumented using $PROTAPER^{TM}$ system and obturated using continuous wave technique. In each root, a 9-mm deep post space was prepared. #2 translucent fiber post (DT Light post, Bisco Inc., Schaumburg, IL, U.S.A.) was cemented using injection technique with Uni-dose needle tip (Bisco) and six different resin cements. The tested resin cements were Duo-Link (Bisco Inc., Schaumburg, IL, U.S.A.), Variolink II (Ivoclar-Vivadent AG, Schann, Liechtenstein), Panavia F (Kuraray Medical Inc., Okayama, Japan), Multilink Automix (Ivoclar-Vivadent AG, Schann, Liechtenstein), RelyX Unicem (3M ESPE Dental Products, St. Paul, MN, U.S.A.), and Maxcem (Kerr Co., CA, U.S.A.). After storage in distilled water for 24 hours, each root was transversally sectioned into approximately 1-mm thick sections. This procedure resulted in 6 serial sections per root. Push-out test wasperformed using a universal testing machine (EZ Test, Shimadzu Co.) with a crosshead speed of 1 mm/min. The data were analyzed with one-way ANOVA and Tukey HSD (p=0.05). The push-out strength of the groups which cemented fiber post with Panavia F and Multilink Automix were lower than those of the other groups. But, there were no statistically significant difference among groups at a probability level of 0.05.

이 연구는 다양한 접착시스템을 사용하는 6가지 레진시멘트를 이용하여 근관에 합착한 섬유포스트를 push-out 검사에 의해 포스트와 치근 상아질 간의 결합강도를 상호 비교하기 위하여 시행되었다. 발거된 하악 소구치의 치관부를 제거하고 치근부를 근관충전한 후 9mm의 포스트 룸을 형성하였다. 사용된 레진시멘트의 종류에 따라서 무작위로 6개씩 선택하여 Duo-Link 군, Variolink II 군, Panavia F 군, Multilink Automix 군, RelyX Unicem 군, Maxcem 군으로 분류하였다. 제조사의 지시에 따라서 각각의 레진시멘트를 Uni-dose needle tip을 이용하여 근단부에서부터 주입하여 광투과성 섬유 포스트인 no. 2 DT Light Post를 근관에 합착하였다. 증류수에 24시간동안 보관한 후, 주수 하에 저속의 Diamond Wheel Saw를 이용하여 각 치근을 횡단면으로 1mm 두께로 절단하여 연속적인 절편 6개를 얻었다. 각 군의 시편을 universal testing machine에 고정하고 push-out 검사를 시행하여 push-out 강도를 통계 분석한 결과, 서로 다른 접착시스템을 사용한 레진시멘트 군간의 push-out 강도는 유의한 차이가 나타나지 않았다 (p > 0.05).

Keywords

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  1. Effect of dentin surface wetness on tensile bond strength of self adhesive resin cements vol.34, pp.2, 2009, https://doi.org/10.5395/JKACD.2009.34.2.113
  2. Effect of surface treatments of fiber posts on bond strength to composite resin cores vol.35, pp.3, 2010, https://doi.org/10.5395/JKACD.2010.35.3.173
  3. Comparison of push-out bond strength of post according to cement application methods vol.35, pp.6, 2010, https://doi.org/10.5395/JKACD.2010.35.6.479