Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Effect of Saliva Contamination Stage and Different Decontamination Procedures on Bonding Strength of Resin-Modified Glass Ionomer

레진강화형 글라스아이오노머의 초기 결합력과 타액오염 제거의 상관관계

  • Go, Hanho (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University) ;
  • Park, Howon (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University) ;
  • Lee, Juhyun (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University) ;
  • Seo, Hyunwoo (Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University)
  • 고한호 (강릉원주대학교 치과대학 소아치과학교실 및 구강과학연구소) ;
  • 박호원 (강릉원주대학교 치과대학 소아치과학교실 및 구강과학연구소) ;
  • 이주현 (강릉원주대학교 치과대학 소아치과학교실 및 구강과학연구소) ;
  • 서현우 (강릉원주대학교 치과대학 소아치과학교실 및 구강과학연구소)
  • Received : 2018.09.27
  • Accepted : 2018.11.08
  • Published : 2019.05.31
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Abstract

The purpose of this study was to compare the bond strength of resin-modified glass ionomer (RMGI) to dentin with saliva contamination at different stages and using different decontamination procedures. Extracted human permanent molars were embedded onto acrylic resin with the dentin surface exposed. Group I was a control group that was conditioned with polyacrylic acid (PAA). Groups II and III were contaminated with saliva before PAA conditioning and Groups IV, V, and VI were contaminated with saliva after PAA conditioning. After saliva contamination, Groups II and IV were dried, Groups III and V were rinsed and dried, and Group VI was additionally conditioned with PAA. After surface treatment, the dentin specimens were filled with RMGI. Group I showed significantly higher bond strength than the other groups. Group VI showed a significantly higher bond strength than the other saliva contaminated groups. However, there were no significant differences in the failure mode between the different groups. Saliva contamination impaired the bond strength of RMGI to dentin, regardless of when the saliva contamination occurred. Decontamination with washing and drying could not improve the shear bond strength of RMGIC. When saliva contamination occurred after PAA conditioning, additional PAA conditioning improved the shear bond strength.

이 연구는 타액오염이 발생한 시기와 타액오염 제거 방법이 레진강화형 글라스아이오노머의 상아질에 대한 결합력에 미치는 영향에 대해 평가하고자 하였다. 각 군당 10개씩 총 60개의 발거된 영구치 상아질 표면을 노출시켜 아크릴 레진에 매몰하였다. I군은 대조군으로 폴리아크릴산(PAA)으로 산처리만 시행하였다. II, III군은 PAA 산처리 전 타액오염을 시켰고 IV, V, VI군은 PAA 산처리 후 타액오염을 시켰다. 타액오염 후 II군과 IV군은 건조하였고 III군과 V군은 수세 후 건조하였으며 VI군은 추가적으로 PAA 산처리하였다. 그 후 레진강화형 글라스아이오노머를 충전하였다. 전단결합강도는 만능 재료 시험기로 측정하였고 파절 양상은 주사전사현미경으로 관찰하였다. 대조군인 I군이 유의하게 가장 높은 전단결합강도를 보였다(p = 0.001). 타액오염을 시행한 군들 중에서는 VI군이 유의하게 높은 전단강도를 보였다(p = 0.001). 파절양상은 군간에 유의한 차이를 보이지 않았다(p = 0.729). 타액오염은 발생한 시기와 상관없이 레진강화형 글라스아이오노머의 상아질에 대한 결합력을 유의하게 저하시켰다(p = 0.001). 수세와 건조만으로는 전단결합강도를 회복하지 못했다. PAA 산처리 후 타액오염이 발생한 경우 추가적인 PAA 산처리가 전단결합강도를 유의하게 향상시켰다(p = 0.001).

Keywords

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