Methods : The experiment animal model was established by temporary prosthesis on dogs ' teeth using chemical-curing resin thermal-curing resin DMG-TEMP crown material and SWIFT composite resin respectively .

方法：给犬进行自凝塑料、热凝塑料、DMG-TEMP复合树脂和松风 SWIFT-TEMP树脂 暂时冠修复，建立实验动物模型。

To study the curative effect of the posterior teeth with longitudinal fracture by temporary fixation of plastic crown the posterior teeth with longitudinal fracture was fixed with instant crown of selfcuring crylic resin following root canal treatment and then replaced with cast crown .

为探讨塑料冠 暂时固定纵折 后牙的疗效，采用自凝塑料冠固定纵折后牙， 牙合面钻孔行根管治疗后铸造金属全冠修复。