Morfis A S, Siskos G
Department of Conservative Dentistry, Faculty of Dentistry, School of Health Sciences, University of Athens.
J Clin Pediatr Dent. 1991 Fall;16(1):13-9.
The purpose of this study was to examine the type of root-end closure achieved with the apexification technique, in relation to age, sex and stage of root development. Data from 34 cases, in which apexification was performed, were analyzed. In all cases chemically pure powder Ca (OH)2 with anaesthetic solution was used. The age of 12 patients was between 27-40 years (1 male and 11 females) and of the other 22 was between 8-20 years (14 males and 8 females). Continuation of root development was achieved in 6 cases, continuation and bridge formation was revealed in three cases, bridge formation was seen in 21 cases and finally in 4 cases no root-end closure was noticed. From the above results it was evident that the bridge formation was the most common form of root-end closure. Statistical analysis revealed a strong correlation between the type of root-end closure and the stage of root development prior to apexification in relation to: a) sex and b) age. Thus the bridge formation was the most common type (87.5%) in the group of females. Also in the same sex group concerning the stage 4 of root development bridge formation was again the type of root-end closure (92.85%). Finally, it was found that in age group B (27-45-years-old), with stage 4 of root development, the bridge formation was the most common type of root-end closure (90%).
本研究的目的是探讨根尖诱导成形术所实现的根端封闭类型与年龄、性别及牙根发育阶段之间的关系。对34例行根尖诱导成形术的病例数据进行了分析。所有病例均使用化学纯的氢氧化钙粉末与麻醉剂溶液。12例患者年龄在27至40岁之间（1例男性，11例女性），另外22例年龄在8至20岁之间（14例男性，8例女性）。6例实现了牙根继续发育，3例显示牙根继续发育并形成桥接，21例见到桥接形成，最后4例未观察到根端封闭。从上述结果可以明显看出，桥接形成是根端封闭最常见的形式。统计分析表明，根端封闭类型与根尖诱导成形术前牙根发育阶段在以下方面存在强相关性：a）性别；b）年龄。因此，桥接形成是女性组中最常见的类型（87.5%）。同样在相同性别组中，关于牙根发育第4阶段，桥接形成也是根端封闭类型（92.85%）。最后发现，在年龄组B（27至45岁）且处于牙根发育第4阶段时，桥接形成是根端封闭最常见的类型（90%）。
