Holland R, Souza V, Nery M J, Bernabe P F, Mello W, Otoboni Filho J A
Aust Dent J. 1980 Aug;25(4):189-92. doi: 10.1111/j.1834-7819.1980.tb03861.x.
The periapical tissues of adult teeth of monkeys were examined histologically after root canal treatment with calcium hydroxide. Healing, as evidenced by complete apical closure with a hard tissue bridge and an inflammation-free periodontal ligament, occurred more frequently where canals were instrumented 1 mm short of the apex. Overinstrumented canals exhibited a significantly decreased incidence of apical closure.
用氢氧化钙进行根管治疗后，对成年猴牙齿的根尖周组织进行了组织学检查。当根管预备至距根尖1毫米处时，根尖通过硬组织桥完全封闭且牙周膜无炎症，愈合更为常见。过度预备的根管根尖封闭的发生率显著降低。
