Department of Paediatric Dentistry, Faculty of Dentistry, Ondokuz Mayis University, Kurupelit, 55139, Samsun, Turkey.
Eur Arch Paediatr Dent. 2022 Jun;23(3):449-454. doi: 10.1007/s40368-022-00703-z. Epub 2022 Mar 23.
Although electric pulp tests (EPT) may play a valuable diagnostic role in traumatized immature permanent teeth, the EPT threshold values which can be used as reference are not known. The aim of this study was to determine the average range of EPT threshold values in healthy permanent incisors according to their stage of root development.
A total of 1200 permanent incisors were examined in 273 children (142 girls, 131 boys) aged 6-12 years. Panoramic radiographs were used to group teeth according to the stage of root development. A digitest II pulp vitality tester (Parkell, Inc, Edgewood, NY) was used along with toothpaste as the conducting medium to determine sensibility on three different sites (incisal, middle and cervical third).
In all teeth, mean EPT values showed a tendency to decrease along with advanced root development. Irrespective of the stage of root development, the lowest EPT values were obtained when measurements were made on the incisal third of the crown (p < 0.001). Mandibular incisors had lower mean response thresholds than their maxillary counterparts.
The present findings provide reference EPT threshold values according to stage of tooth development to monitor the post traumatic pulp status of permanent incisors.
尽管电活力测试（EPT）在诊断外伤未成熟恒牙方面可能具有重要作用，但目前尚不清楚可作为参考的 EPT 阈值。本研究旨在根据恒牙牙根发育阶段，确定健康恒切牙的 EPT 阈值的平均范围。
本研究共检查了 273 名 6-12 岁儿童（142 名女孩，131 名男孩）的 1200 颗恒切牙。使用曲面体层片根据牙根发育阶段对牙齿进行分组。采用 Digitest II 牙髓活力测试仪（Parkell，Inc，Edgewood，NY），结合牙膏作为传导介质，在三个不同部位（切端、中 1/3 和颈 1/3）测定敏感性。
所有牙齿的 EPT 值均随牙根发育的进展而呈下降趋势。无论牙根发育阶段如何，在牙冠切端测量时，EPT 值最低（p<0.001）。下颌切牙的平均反应阈值低于上颌切牙。
本研究为监测外伤后恒牙牙髓状态提供了依据牙根发育阶段的参考 EPT 阈值。
