INVESTIGATION OF MINERAL TRIOXIDE AGGREGATE FOR ROOT-END FILLING IN DOGS
INVESTIGATION OF MINERAL TRIOXIDE AGGREGATE FOR ROOT-END FILLING IN DOGS
复制标题
DOI：
10.1016/s0099-2399(06)81112-x
复制
发表时间：
1995-12-01
影响因子：
4.2
通讯作者：
FORD, TRP
中科院分区：
文献类型：
--
作者：
TORABINEJAD, M;HONG, CU;FORD, TRP
许多化合物已被用作根部填充材料。根据体外和骨内植入试验的结果，三氧化二矿物团聚体(MTA)似乎具有作为根端充填材料的潜力。本研究的目的是检测狗的神经根周围组织对MTA和银汞合金的反应。在6只Beagle犬的46根神经根周围组织中发现了病变。用牙胶和封闭剂对一半根管进行根管预备和封闭术，并用MTA封闭根管。其余的根管用牙胶充填，不用根管封闭剂。这组牙齿的接近腔向口腔敞开。手术切除牙根后，根端空洞一半用银汞合金充填，其余用MTA充填。分别于术后2~5wk和10~18wk处死动物，进行组织学观察。统计分析结果显示，与银汞合金相比，根周炎症较少，而邻近MTA的纤维性囊膜较多。此外，MTA表面存在牙骨质是一种常见的发现。结果表明，MTA可作为根尖充填材料。
Numerous compounds have been used as rootend filling materials. Based on the results of in vitro and intraosseous implantation tests, mineral trioxide aggregate (MTA) seems to have potential as a root-end filling material. The purpose of this study was to examine the periradicular tissue response of dogs to MTA and amalgam. Lesions were developed in periradicular tissues of 46 roots in six beagle dogs. The canals on half of the roots were instrumented and obturated with gutta-percha and sealer, and their access cavities were sealed with MTA. The remaining root canals were instrumented and obturated with gutta-percha without root canal sealer. The access cavities of the teeth in this group were left open to the oral cavity. After surgical resection of roots, half of the root-end cavities were filled with amalgam and the rest with MTA. The periradicular tissue response of the dogs was evaluated histologically 2 to 5 and 10 to 18 wk following periradicular surgery. Statistical analysis of the results showed less periradicular inflammation and more fibrous capsules adjacent to MTA, compared with amalgam. In addition, the presence of cementum on the surface of MTA was a frequent finding. The results show that MTA can be used as a root-end filling material.