Marciano J, Michailesco P, Charpentier E, Carrera L C, Abadie M J
Faculté de Chirurgie Dentaire de Montpellier, France.
J Endod. 1992 Jun;18(6):263-70. doi: 10.1016/s0099-2399(06)80952-0.
Samples of three common commercial gutta-percha endodontic filling points (Hygienic, Mynol, and Maillefer Pink) and a sample of natural gutta-percha were submitted to thermomechanical analysis under pressures ranging from 0.01 to 0.2 N. Samples of Mynol and Maillefer filling points were thermally treated and then submitted to thermomechanical analysis in parallel with differential scanning calorimetric analysis. The results show that thermomechanical analysis gives results distinct from those obtained by classic dilatometry and that it is a technique well suited to the study of the thermoplastic properties of gutta-percha. An analysis of the results shows that the amount of the inorganic component used in a commercially available endodontic point has a strong influence on its thermomechanical properties. Thermodynamical properties and the "thermal history" of the gutta-percha are also important. Both temperature and force should be controlled in order to assess the thermomechanical properties of endodontic filling points, while the latter have not yet been codified in clinical procedures.
三种常见的商用牙胶尖根管充填材料（Hygienic、Mynol和Maillefer Pink）样本以及天然牙胶样本在0.01至0.2 N的压力下进行了热机械分析。对Mynol和Maillefer充填材料样本进行了热处理，然后与差示扫描量热分析并行进行热机械分析。结果表明，热机械分析得出的结果与经典膨胀测量法得到的结果不同，并且它是一种非常适合研究牙胶热塑性特性的技术。对结果的分析表明，市售根管充填材料中使用的无机成分的量对其热机械性能有很大影响。牙胶的热力学性质和“热历史”也很重要。为了评估根管充填材料的热机械性能，温度和力都应加以控制，而后者在临床操作中尚未进行规范。
