Replantation of 400 avulsed permanent incisors. 3. Factors related to root growth.
Replantation of 400 avulsed permanent incisors. 3. Factors related to root growth.
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400 颗撕脱的恒切牙再植。
DOI：
10.1111/j.1600-9657.1995.tb00463.x
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
F. Andreasen
中科院分区：
文献类型：
--
作者：
J. Andreasen;M. Borum;F. Andreasen
我们检查了400个撕脱和再植的恒切牙的牙髓和牙周愈合情况。30颗牙损伤时牙根形成不完整。由于非生理性牙槽外储存（即自制生理盐水），两颗牙齿被排除在研究之外。在剩余的28个再植门牙中，7个完成了根发育，8个部分完成了根发育，13个停止了根发育。再植后牙根发育完全与牙髓血运重建显著相关，在牙髓坏死（15颗牙中有5颗）病例中少见，在牙髓愈合（13颗牙中有11颗）病例中常见（p = 0.01）。根发育与牙槽外贮藏期无显著相关性；但当干贮期小于45 min时，发生频率略高。（p = 0.13）。在6颗牙中发现骨长入并形成内牙周韧带（PDL），这与牙髓愈合后牙根形成受阻有关。这些发现的解释因素似乎是对Hertwig上皮根鞘的损伤。
Four hundred avulsed and replanted permanent incisors were examined for pulpal and periodontal healing. In 30 teeth, root formation was incomplete at the time of injury. Two teeth were excluded from the study due to nonphysiological extraalveolar storage (i.e. homemade saline). Of the 28 remaining replanted incisors, 7 showed subsequently completed root development, 8 partially completed root development and 13 arrested root development. Completed root development subsequent to replantation was found to be significantly related to pulpal revascularization, being rare in cases with pulp necrosis (5 of 15 teeth) and frequent after pulpal healing (11 of 13 teeth) (p = 0.01). Root development was not found to be significantly related to the extraalveolar storage period; but occurred slightly more frequently when the dry storage period was less than 45 min. (p = 0.13). Ingrowth of bone and formation of an internal periodontal ligament (PDL) was found in 6 teeth and was related to arrested root formation in cases with pulpal healing. The explanatory factor for these findings appeared to be damage to the Hertwig's epithelial root sheath.