Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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THE CHANCE OF ADAPTABILITY CHANCE IN ADHESIVE SYSTEMS TO DENTIN SUBSTRTE ACCORDING TO STORAGE TIME

상아질 접착 후 저장기간에 따른 접착제의 접착력 변화

  • Cho, Young-Gon (Department of Conservative Dentistry, College of, Chosun University) ;
  • Ban, Il-Hwan (Department of Conservative Dentistry, College of, Chosun University) ;
  • Yu, Mi-Kyung (Department of Conservative Dentistry, School of Dentistry, Chonbuk National University)
  • 조영곤 (조선대학교 치과대학 치과보존학교실) ;
  • 반일환 (조선대학교 치과대학 치과보존학교실) ;
  • 유미경 (전북대학교 치과대학 치과보존학교실)
  • Published : 2005.05.01
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Abstract

This study compared the microtensile bond strength (${\mu}$TBS) and microscopic change of two 2-step and two 1-step self-etching adhesives to dentin according to storage times in distilled water. Occlusal dentin was exposed in 48 human molars. They were divided to four groups by different adhesives: SE Bond group (Clearfil SE Bond), AdheSE group (AdheSE). Adper group (Adper Prompt L-Pop), and Xeno group (Xeno III) . Each group was stored in 37$^{\circ}C$ distilled water for 1, 15, and 30 days. Resin-bonded specimens were sectioned into beams and subjected to ${\mu}$TBS testing with a crosshead speed of 1 mm/minute. For SEM observation, one specimen was selected and sectioned in each group after each stroage time. Resin-dentin interface was observed under FE-SEM. In all storage times, mean ${\mu}$TBS of SE group was significantly higher than those of other groups (p < 0.05). There was no significant difference between mean ${\mu}$TBS of SE group and AdheSE group among all storage times, but significant difference between 1- and 30-day storage in mean y${\mu}$TBS of Adper group and Xeno group (p > 0.05). For 1-and 15-day storage, all groups showed the close adaptation between resin-dentin interfaces. For 30-day storage, resin-dentin interfaces showed wide gap in Adper group and separate pattern in Xeno III group.

본 연구는 상아질에 2단계와 단일 단계 자가 산부식 접착제를 적용하여 복합레진을 접착한 후 저장기간에 따른 미세 인장 결합강도와 접착계면의 변화를 상호 비교하기 위하여 시행하였다. 발거된 상 하악 대구치 48개의 교합면측 상아질을 노출시켜 12개씩 4개의 군으로 분류하였다 사용된 접착제의 종류에 따라 SE Bond 군, AdheSE 군, Adper 군, Xeno III 군으로 분류하여 접착제를 적용한 후, 동일 회사의 복합레진 을 4 mm두께로 접착시켰다. 각 군당 4개의 치아를 선택하여 증류수가 담겨진 용기에 집어넣고 37$^{\circ}C$의 항온기에 각각 1일 15일, 30일 동안 저장한 후 시편을 제작하여 각각 미세인장 결합강도의 측정과 주사전자 현미경 관찰 하여 다음과 같은 결과를 나타내었다. 2단계 자가 산부식 접착제는 1일에서 30간의 저장기간 동안 결합강도가 점차적으로 감소하였지만 통계학적으로 유의한 차이를 나타내지 않았고, 상아질과 접착제 간에 긴밀한 접착관계를 보였다. 반면에 단일 단계자가 산부식 접착제는 1일의 저장기간에 비해 30일의 저장기간에서 통계학적인 결합강도의 감소를 나타내었으며, 상아질과 접착제 간에 넓은 간극이 관찰되었다. 따라서 본 연구에서 나타난 두 종류의 30일 동안의 접착내구성은 2단계 자가 산부식 접착제가 단일 단계 자가 산부식 접착제보다 우수한 것으로 나타났다.

Keywords

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