根管测量仪测定不同类型患牙工作长度准确性的探讨

目的:探讨不同类型患牙应用根管测量仪测量根管长度的准确性。方法:选择88例需要根管治疗的病例,共122颗患牙,均为单根牙,其中牙髓炎组62颗,根尖周炎组60颗。两组分别采用Root ZX根管测量仪测量根管工作长度并与X线法计算的根管工作长度比较,了解其应用在不同患牙时的准确性。结果:应用根管测量仪牙髓炎组的准确率优于根尖周炎组。结论:电测法测定根管工作长度快速、准确,但对较复杂的患牙,需用X线辅助校正电测法的结果。

Investigation of the apex locator for determining the accuracy of working length of different teeth

Objective： To investigate the accuracy of the apex locater in measuring the working length of different teeth. Method： 122 single-root-canal teeth from 88 patients who need root canal therapy,62 teeth in pulpitis group,60 teeth in apical periodontitis group. The tow groups root canals were measured by Root ZX apex locator, comparing with the working length by X-ray respectively in order to know the accuracy in different dental. Result： The resuh of the pulpitis group was better than that of the apical periodontitis group. Conclusion： The electronic apex locator can measure root canal length accurately and fast,but to the complicated teeth, X-ray can assist in correction results.