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ISSN : 0376-4672
MTA(mineral trioxide aggregate) 는 치아와그 주위조직간에 개통이 생겼을 때에 - 의원성(iatrogenic) 또는 병적인 원인에 의해 - 그 개통된부분을 메워주기(sealing) 위한 목적으로, 1993년Loma Linda 대학교의 Torabinejad 등에 의해 개발되었다1). 그 이후로 MTA 에 대해 많은 연구를 거듭한 결과 MTA는 생체친화적(biocompatible)이고,sealing 능력이 뛰어나며, 항균효과가 좋고, 돌연변이를 유발하지 않으며, 광화조직(mineralized tissue)의 형성을 촉진시키고, 치주인대의 재생을 돕는 등의성질, 즉 치과재료가 가져야 하는 이상적인 성질을 다수 지니고 있다는 것이 밝혀졌고2), 이에 따라 MTA는치수복조술, 치수절단술, 치근천공의 수복, 치근첨 형성술, 치근단 역충전, 근관충전 등에 광범위하게 사용되어지기 시작했다3). 하지만, 이러한 많은 장점에도 불구하고, MTA에도한계점이 존재한다. 즉, 다루기 힘들고, 작업시간이 짧고(4분 이내), 경화시간은 길며(연구에 따라 75분에서72시간까지), 치아를 변색시킬수 있고, 독성물질을 함유하고 있으며, 일단 경화된 다음엔 제거하기가 힘들다는 점 등이 그 한계점이라 할수 있겠다4~7). 따라서 근관치료 영역의 거의 전 영역에 걸쳐서 우수한 재료로 인정되어 거의 만병통치약처럼 여겨지며 사용되어지고 있는 MTA 의 한계점에 대해 연구한 논문들과 그 한계점을 극복하기 위한 여러가지 노력들에 대한 논문을 고찰하여 MTA 의 임상적용에 도움이 되고자 한다.
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