Shear Bond Strength of Adhesive Precoated (APC II) Bracket Bonded with Self-etching Primer

다국어 초록 (Multilingual Abstract)

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국문 초록 (Abstract)

본 연구의 목적은 건조 또는 습윤 상태에서 self-etching primer로 전처리 후 부착된 adhesive precoated(APC) 브라켓의 전단결합강도를 평가하는 것이었다. 120개의 건전한 소구치가 사용되었으며, self-etching primer(Transbond Plus Self-Ethcing Primer)를 동일하게 치면에 적용하였다. Self-etching primer 도포 전에 인공타액을 적용한 습윤군(W)과 적용하지 않은 건조군(D)으로 나누고, 사용된 adhesive의 종류(APCII, Transbond XT, Light-bond)에 따라각각 20개의 치아로 구성된 6종류의 군(group TD, group AD, group LD, group TW, group AW, group LW)으로 구분하였다. 24시간 경과 후 Instron Universal testing machine을 이용하여 전단결합강도를 측정했으며, debonding 후 파절양상을 알아보기 위해 bracket base에 남아있는 adhesive를 관찰하여 ARI score를 기록하였다. 본 실험의 결과는 APC II system은 임상적으로 사용 가능한 bond strength를 가지며, saliva contamination시에도 hydrophilic한성질에 의해 기존의 adhesive보다 높은 bond strength를 보인다는 것이다.

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