Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
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Physical Properties of Different Automixing Resin Cements and the Shear Bond Strength on Dentin

수종 Automixing 레진시멘트의 물성과 상아질에 대한 전단결합강도

  • Song, Chang-Kyu (Department of Conservative Dentistry, College of Dentistry, Kangnung-Wonju National University) ;
  • Park, Se-Hee (Department of Conservative Dentistry, College of Dentistry, Kangnung-Wonju National University) ;
  • Kim, Jin-Woo (Department of Conservative Dentistry, College of Dentistry, Kangnung-Wonju National University) ;
  • Cho, Kyung-Mo (Department of Conservative Dentistry, College of Dentistry, Kangnung-Wonju National University)
  • 송창규 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 박세희 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 김진우 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 조경모 (강릉원주대학교 치과대학 치과보존학교실)
  • Received : 2009.08.20
  • Accepted : 2009.12.25
  • Published : 2009.12.31
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Abstract

The purpose of this study was to evaluate the physical properties of different automixing resin cements and the shear bond strength on dentin. For this study, two self-adhesive automixing resin cement(Rely-X Unicem(3M ESPE, St. Paul, USA), Embrace resin cement(Pulpdent, Oakland, USA)) and one chemical polymerizing resin cement(Resiment Ready-Mix(J.L.Blosser Inc., Liberty Missouri, USA)) were used. To evaluate the physical properties, compressive strength, diametral tensile strength and flexural strength were measured. The specimens were fabricated using Teflon mould according to manufacturers' instructions and stored for 24 hours in an atmosphere of 100% humidity. To evaluate the shear bond strength on dentin, each cements were adhered to buccal dentinal surface of extracted human lower molars in 2mm diameter. Physical properties and shear bond strengths were measured using universal testing machine(Z010, Zwick GmbH, Ulm, Germany) at a crosshead speed of 0.5mm/min. The physical properties and shear bond strength of different automixing resin cements were statistically analyzed and compared between groups using One-way ANOVA test and Schffe post-hoc test at the 95% level of confidence. The result shows that chemical polymerizing automixing resin cement represents the relatively higher physical properties and shear bond strength than self-adhesive automixing resin cements.

본 연구에서는 여러 automixing 레진시멘트의 물성과 상아질에 대한 전단결합강도를 평가, 비교하고자 하였다. Self-adhesive automixing 레진시멘트인 Rely-X Unicem(3M ESPE, St. Paul, USA), Embrace resin cement(Pulpdent, Oakland, USA)와 chemical polymerizing automixing 레진시멘트인 Resiment Ready-Mix(J.L.Blosser Inc., Liberty Missouri, USA)를 사용하였다. 물성을 평가하기 위하여 레진시멘트를 테프론 주형에 주입한 후 자가중합을 시키고 24시간 동안 빛이 차단된 상태로 100% 상대습도에 보관 후 만능 시험기를 이용하여 압축강도, 간접인장강도, 굴곡강도를 측정하였다. 상아질에 대한 전단결합강도를 평가하기 위하여 발거한 하악 제3대구치의 협측 상아질을 노출 시킨 후 일정한 크기로 레진시멘트를 부착시킨 뒤 만능 시험기를 이용하여 전단결합강도를 측정하였다. SPSS Ver 12.0(SPSS Inc., Chicago, IL, USA)을 사용하여 95% 유의수준에서 One way ANOVA test로 분석하였으며 Scheffe test로 사후검정 하였다. 연구결과, chemical polymerizing automixing 레진시멘트가 self-adhesive automixing 레진시멘트에 비해 상대적으로 높은 물리적 성질과 상아질에 대한 전단결합강도를 보였다.

Keywords

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