应用不同介质及不同测试位点进行牙髓电活力测试的评价

Evaluation of electric pulp test using different conducting media and different test sites

目的评价应用牙膏或心电图凝胶在不同测试位点进行牙髓电活力测试的准确度,可靠度及灵敏度。方法对177颗符合纳入标准的健康牙使用牙膏介质或心电图凝胶介质在3个不同的测试位点(颊侧中1/3,颊侧颈1/3,切端或颊尖)进行电活力测试,使用重复性方差分析及组间两两比较进行统计。结果不同测试介质的准确度无统计学差异;三次测试期间的可靠性无统计学差异;切牙区凝胶法三分组灵敏度均较高;尖牙区及前磨牙区凝胶法牙尖组灵敏度最高;磨牙区凝胶法牙尖组及凝胶法颈1/3组灵敏度均较高;除切牙区外,牙膏法中1/3组在其他各区灵敏度最差。结论在电活力测试法的应用中排除假阳性及假阴性的干扰,可获得良好的准确度和可靠度;切牙区使用心电图凝胶测试灵敏度较好;尖牙区,前磨牙区及磨牙区使用心电图凝胶应用于牙尖位点测试更好,在此三个区域使用牙膏在中1/3位点进行测试灵敏度最低。

Objective To evaluate the accuracy,reliability and sensitivity of toothpaste or electrocardiogram gel for electric pulp test.Methods A total of 177 healthy teeth that met the inclusion criteria were tested with electric pulp test on three different test sites(buccal middle 1/3,buccal neck 1/3,insical or buccal tip)using toothpaste conductor or electrocardiogram gel conductor.RMANOVA and Pairwise comparisons were used for statistical analysis.Results There was no significant difference in the accuracy of different test media.There was no statistical difference in reliability during the three tests.The sensitivity of the three ECG gel was higher in the incisor area.The sensitivity of the ECG gel on insical or buccal tip was the highest in the canine area and premolar area.In molar area using ECG gel,buccal tip and buccal neck 1/3had higher sensitivity.Except for the incisor area,the sensitivity of buccal middle 1/3 using toothpaste was the worst in other areas.Conclusions Good accuracy and reliability can be obtained by eliminating the interference of false positive and false negative in the application of electric pulp test.The sensitivity of ECG gel test in incisor area was better.The use of ECG gel in insical or buccal tip,canine area,premolar area and molar area was better,the sensitivity of buccal middle 1/3 group in the toothpaste method was the worst in the three regions.