Bender I B, Landau M A, Fonsecca S, Trowbridge H O
Department of Dental Medicine, Albert Einstein Medical Center, Philadelphia, PA.
J Am Dent Assoc. 1989 Mar;118(3):305-10. doi: 10.14219/jada.archive.1989.0096.
The present study of 2,387 recordings of 12 anterior teeth in 53 patients indicates that the incisal edge is the optimal placement-site for the electric pulp tester to determine the lowest response threshold. The results show significant individual variations in the lowest threshold responses of the cervical-third, middle-third, incisal one-third, and incisal edge sites on a tooth, with a confidence level of 99%, according to the analysis of variance. The maxillary teeth gave a higher response threshold than the mandibular teeth and different types of teeth (canines and incisors) had statistically significant different response thresholds. The application of the electric pulp tester to the incisal-edge region with exposed dentin produced the most significant decrease in the threshold response.
本研究对53例患者12颗前牙的2387次记录表明，切缘是牙髓电活力测试仪确定最低反应阈值的最佳放置部位。根据方差分析，结果显示，牙齿颈部三分之一、中部三分之一、切端三分之一和切缘部位的最低阈值反应存在显著个体差异，置信水平为99%。上颌牙的反应阈值高于下颌牙，不同类型的牙齿（犬齿和切牙）具有统计学上显著不同的反应阈值。将牙髓电活力测试仪应用于牙本质暴露的切缘区域，阈值反应下降最为显著。
