Ploder O, Partik B, Rand T, Fock N, Voracek M, Undt G, Baumann A
Clinic for Oral and Maxillofacial Surgery, General Hospital, University of Vienna Medical School, Austria.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2001 Sep;92(3):335-40. doi: 10.1067/moe.2001.116505.
Dental magnetic resonance imaging (dMRI) with administration of contrast material is one method of assessing pulpal perfusion. The purpose of this study was to evaluate the level of contrast enhancement displayed by means of dMRI after transplantation of teeth and to compare these findings with the results of tooth mobility, pocket depth, cold, and electrical tests.
Twenty-three teeth with either complete root formation or incomplete root formation (IRF) were investigated by using dMRI and were clinically examined at intervals of 2, 4, 8, and 12 weeks, as well as 6 months and 12 months after transplantation.
An analysis of the enhancement in the dental images revealed a significant difference between teeth with IRF and teeth with complete root formation. In addition, the time to occurrence of a positive reaction to the cold test was significantly longer for teeth with IRF.
The findings of this study indicate that transplanted IRF teeth are associated with reperfusion seen by means of dMRI as well as with delayed occurrence of a positive cold test.
使用造影剂的牙科磁共振成像（dMRI）是评估牙髓灌注的一种方法。本研究的目的是评估牙齿移植后通过dMRI显示的对比增强水平，并将这些结果与牙齿松动度、牙周袋深度、冷诊和电诊的结果进行比较。
使用dMRI对23颗牙根完全形成或牙根未完全形成（IRF）的牙齿进行研究，并在移植后的2周、4周、8周、12周以及6个月和12个月进行临床检查。
对牙科图像增强的分析显示，IRF牙齿和牙根完全形成的牙齿之间存在显著差异。此外，IRF牙齿对冷诊出现阳性反应的时间明显更长。
本研究结果表明，移植的IRF牙齿与通过dMRI观察到的再灌注以及冷诊阳性反应的延迟出现有关。
