年轻恒牙牙髓电活力测试的临床研究  

The clinical study on the pulp electrovitaty of young permanent tooth

作　　者：叶维卡[1] 徐如生[1] 黄力子[1] 

机构地区：[1]第四军医大学口腔医院,陕西西安沈阳军区总医院710032

出　　处：《临床口腔医学杂志》2002年第6期430-432,共3页Journal of Clinical Stomatology

摘　　要：目的　研究年轻恒牙电活力试验多出现假阴性的原因。方法　通过对全颌曲面断层X线片上牙根尖孔宽度的测量。比较不同根尖孔宽度的电活力试验结果。结果　根尖孔宽大者 ,假阴性率高。随着根尖孔宽度减小 ,电活力试验的准确率提高 ,它们之间呈负相关。结论　新生恒牙出现电活力试验假阴性是由于根尖孔面积过大 ,通过根尖部牙髓单位面积的电流强度相对较小 。Objective To study the reason of false negative in measuring young peramanent tooth pulp electrovitality . Methods The results of pulp electrovitality were compared with that of the width of the tip of a root obtained by X ray photograph. Results The false-negabive rate increase with the enlargement of the width of the tip of a root ,there are negative correlational relationship between the electrovitality value and the width of the tip of a root . Conclusion The reason of the false negative in measuring young permanent tooth pulp electrovitality is that there are the bigger area in the tip of a root and then the lower electric current through the tip of a root .

关 键 词：牙髓电活力试验 年轻恒牙 假阴性反应 电学特性理论 临床研究 

分 类 号：R781.3[医药卫生—口腔医学]