Alhadainy H A, Elsaed H Y, Elbaghdady Y M
Division of Endodontics, College of Dentistry, University of Tennessee, Memphis.
J Endod. 1993 Oct;19(10):508-11. doi: 10.1016/S0099-2399(06)81492-5.
Eighty-eight extracted mandibular and maxillary cuspids were selected for this study. Eighty cuspids were used as experimental groups and eight were used as controls. Anatomical crowns were resected, root canals were prepared, and the apical 2 mm of the roots were removed. The experimental roots received apical cavity preparations and were randomly divided into four equal groups. The apical cavities were retrofilled with amalgam, heat-sealed gutta-percha, zinc polycarboxylate cement, or glass ionomer cement. Leakage was measured using an electrochemical technique. Statistical analysis of the results indicated that glass ionomer sealed significantly better than the other materials, followed by amalgam, heat-sealed gutta-percha, and zinc polycarboxylate cement, respectively.
本研究选取了88颗拔除的下颌和上颌尖牙。80颗尖牙作为实验组，8颗作为对照组。切除解剖冠，预备根管，并去除根尖2mm的牙根。对实验牙根进行根尖腔预备，并随机分为四组。根尖腔分别用汞合金、热封闭牙胶、聚羧酸锌水门汀或玻璃离子水门汀进行倒充填。采用电化学技术测量微渗漏。结果的统计分析表明，玻璃离子水门汀的封闭效果明显优于其他材料，其次分别是汞合金、热封闭牙胶和聚羧酸锌水门汀。
