Katz A, Mass E, Kaufman A Y
Department of Endodontology, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel.
ASDC J Dent Child. 1996 Nov-Dec;63(6):414-7.
The purpose of this study was to test the ability of an electronic apex locator, Root ZX to measure the root canal length in primary teeth with partial resorption. Twenty extracted primary molars were embedded in an alginate model imitating in vivo conditions. Root ZX and radiographic measurements were compared in dry and wet environments to the actual tooth length. Root ZX identified the tooth length at the most coronal portion of the resorption. The content of the root canal did not influence the results. No statistical differences were found between electronic, radiographic and actual tooth length measurements, although the radiographic measurements were longer than the electronic ones. It is suggested that Root ZX is a preferable auxiliary device to measure root canal length in the primary dentition.
本研究的目的是测试电子根尖定位仪Root ZX测量部分吸收的乳牙根管长度的能力。将20颗拔除的乳磨牙嵌入模拟体内条件的藻酸盐模型中。在干燥和湿润环境下，将Root ZX和X线片测量结果与实际牙长进行比较。Root ZX在吸收最冠方部分确定牙长。根管内容物不影响结果。尽管X线片测量值比电子测量值长，但电子测量、X线片测量与实际牙长测量之间未发现统计学差异。提示Root ZX是测量乳牙列根管长度的一种较好的辅助装置。
