Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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EFFECT OF CUTTING INSTRUMENTS ON THE DENTIN BOND STRENGTH OF A SELF-ETCH ADHESIVE

상아질 삭제기구가 자가부식 접착제의 결합강도에 미치는 효과

  • Lee, Young-Gon (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
  • Moon, So-Ra (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
  • Cho, Young-Gon (Department of Conservative Dentistry, College of Dentistry, Chosun University)
  • 이영곤 (조선대학교 치과대학 치과보존학교실) ;
  • 문소라 (조선대학교 치과대학 치과보존학교실) ;
  • 조영곤 (조선대학교 치과대학 치과보존학교실)
  • Published : 2010.01.29
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Abstract

The purpose of this study was to compare the microshear bond strength of a self-etching primer adhesive to dentin prepared with different diamond points, carbide burs and SiC papers, and also to determine which SiC paper yield similar strength to that of dentinal surface prepared with points or burs. Fifty-six human molar were sectioned to expose the occlusal dentinal surfaces of crowns and slabs of 1.2 mm thick were made. Dentinal surfaces were removed with three diamond points, two carbide burs, and three SiC papers. They were divided into one of eight equal groups (n = 7); Group 1: standard diamond point(TF-12), Group 2: fine diamond point (TF-12F), Group 3: extrafine diamond point (TF-12EF), Group 4: plain-cut carbide bur (no. 245), Group 5: cross-cut carbide bur (no. 557), Group 6 : P 120-grade SiC paper, Group 7: P 220-grade SiC paper, Group 8: P 800-grade SiC paper. Clearfil SE Bond was applied on dentinal surface and Clearfil AP-X was placed on dentinal surface using Tygon tubes. After the bonded specimens were subjected to uSBS testing, the mean uSBS (n = 20 for each group) was statistically compared using one-way ANOV A and Tukey HSD test. In conclusion, the use of extrafine diamond point is recommended for improved bonding of Clearfil SE Bond to dentin. Also the use of P 220-grade SiC paper in vitro will be yield the results closer to dentinal surface prepared with fine diamond point or carbide burs in vivo.

이 연구는 다이몬드 포인트와 카바이드 버 및 SiC paper로 삭제한 상아질에 대한 자가부식 프라이머 접착제의 결합강도를 비교하고, 실험실에서 사용하는 SiC paper와 유사한 결합강도를 나타내는 회전용 삭제기구를 알아보기 위하여 시행하였다. 56개의 발거된 대구치 치관의 교합면 상아질을 노출시켜 1.2 mm의 두께의 시편을 제작한 후 8개의 군으로 분류하였다. 1군은 standard diamond point (TF-12), 2군은 fine diamond point (TF-12F). 3군은 extrafine diamond point (TF-12EF), 4군은 cross-cut carbide bur (no. 557), 5군은 plain-cut carbide bur (no. 245), 6군은 P 120-grade SiC paper, 7군은 P 220-grade SiC paper, 8군은 P 800-grade SiC paper를 사용하여 각 시편의 상아질 표면을 약 0.2 mm정도 삭제하였다. 상아질 표면에 Clearfil SE Primer와 Bond를 적용하고 Tygon tube를 이용하여 Clearfil AP-X를 충전하고 40초간 광조사 하였다. 제작된 시편은 만능시험기를 이용하여 를 미세전단 결합강도는 측정한 후, 각 군의 결합강도를 one-way ANOVA와 Tukey검정을 이용하여 분석하여 다음과 같은 결과를 얻었다. 자가부식 프라이머 접착제 사용 시 상아질에 대한 개선된 접착을 위해서는 초미세입자 다이아몬드 포인트의 사용이 추천되며, 실험실적인 연구에서 P 220-grade SiC paper의 사용은 미세입자 다이아몬드 포인트나 카바이드 버로 삭제한 상아질 면과 유사한 결합강도를 나타내었다.

Keywords

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  2. Shear bond strength of dental CAD-CAM hybrid restorative materials repaired with composite resin vol.54, pp.3, 2016, https://doi.org/10.4047/jkap.2016.54.3.193