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The reliability of electrical pulp test after concussion injury
Author(s) -
Pileggi R.,
Dumsha T. C.,
Myslinksi N. R.
Publication year - 1996
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1996.tb00089.x
Subject(s) - concussion , medicine , pulp (tooth) , latency stage , dentistry , poison control , injury prevention , environmental health
Traumatic injuries lo teeth present a difficult diagnostic problem with respect to determining the vitality of the effected teeth. Conventionally, a latency period of I lo (i weeks is proposed as die amount of lime required for the return of a positive electric pulp lest (EPT) response; however, this has been based on empirical data. The purpose of this study was to 1 determine a time frame during which a return of a reliable response to EPT may be measured, and 2) correlate this time frame with pulpal vascular changes dial occur after traumatic injuries. Four canines from each of nine ferrets were used for this experiment (18 traumatized and 18 control teeth. A reproducible concussion injury was devised by releasing a known weight at a constant height above the facial surface of the experimental teeth. The KPT response was confirmed by the use of an EMG muscle recorder. Animals were killed at 24, 48 and 72 h and 6, 12 and 28 days alter the injury and the teeth analyzed histologically. The histological sections showed an absence flammatory cells in both groups; however, according to the N1H image system, an increase in the number of vessels was detected in die experimental group when compared to die controls. In a majority of the cases, a positive response to the EPT returned within 12 days post concussion injury and as early as 10 days. In addition, a significant vascular change was accompanied with the loss of die EPT response. This study provided a reliable method by which concussion injuries may be studied using an animal model.