혈액 오염 처리 과정이 교정용 브라켓 접착에 미치는 영향
Effect of Blood Decontamination on Orthodontic Bracket Bonding
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혈액 오염 처리 과정은 교정용 브라켓 부착 성공에 중요한 요소이다. 본 연구의 목적은 교정용 브라켓 접착 중 발생할 수 있는 오염처리 과정에 따른 영향을 알아보고자 함이다. 이에 프라이머 광중합 전과 후에 혈액 오염이 되었을 때 세척 방법에 따라 전단 결합 강도에 미치는 영향을 평가해보고, 접착 파절 형태 및 표면 양상을 주사전자 현미경을 이용하여 관찰해보고자 하였다. 50개의 소구치를 대상으로, Ⅰ군은 대조군으로 전통적인 산부식 방법으로 부착하였다. Ⅱ군과 Ⅲ군은 프라이머 광중합 전에, Ⅳ군과Ⅴ군은 프라이머 광중합 후에 혈액 오염이 일어난 군으로 나누었다. 또한 Ⅱ군과 Ⅳ군은 코튼 펠렛만 이용하여, Ⅲ군과 Ⅴ군은 수세 후코튼 펠렛을 이용하여 세척하였다. 그 결과 평균 전단 결합 강도는 Ⅰ군, Ⅴ군, Ⅲ군, Ⅱ군 그리고 Ⅳ군 순으로 나타났다. 또한 주사 전자 현미경 사진 상에서 수세 후 코튼 펠렛으로 닦은 군이 코튼 펠렛으로만 처리한 군에 비해 균일한 산부식 표면을 보였다. 접착제 잔류지수는 대조군과 실험군 간에 유의차가 있었다(p < 0.05).
Abstract
Blood decontamination is an important factor in success of the orthodontic bracket. The purpose of this study is to evaluate the shear bond strength affected by blood decontamination. The shear bond strength was measured on blood decontamination before and after primer photopolymerization. And the adhesive remnants type and surface patterns was evaluated under scanning electron microscopy. A total of 50 human premolars were prepared. Group Ⅰ was attached using conventional resin-acid etching method as control group. Group Ⅱ and Ⅲ were blood contaminated before curing primer and groups Ⅳ and Ⅴ were blood contaminated after curing primer. Group Ⅱ and Ⅳ were treated only with cotton pellet and Groups Ⅲ and Ⅴ were treated with cotton pellet after water washing. The mean shear bond strengths were in the order of groups Ⅰ, Ⅴ, Ⅲ, Ⅱ, and Ⅳ. In scanning electron micrographs group III and V showed more uniform surface than group II and IV. The ARI was significantly different between the control group and the experimental groups (p <0.05).
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