In Vitro Determination of Working Length in Primary Teeth
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Background: The success of a pulpectomy in temporary teeth depends on a precise execution of each one of the steps, such as the chemical-mechanical preparation. The requirement of the latter is to find the root canal’s real length, for which the direct method is the most accurate for in vitro measurements. Purpose: To determine in vitro the concordance of root lengths obtained from primary teeth using the radiographic method and the electronic apical locator (EAL). Methods: The study sample consisted of 40 primary molars extracted at the Pediatric Dentistry Clinic of the Universidad Nacional del Nordeste’s Dental School (Argentina), which met the experimental inclusion and exclusion criteria. The root canals were measured directly in vitro, by means of optical microscopy. Those findings were compared with measurements obtained radiographically and with EAL Results: The statistical analysis showed that the EAL coincided with the measurement obtained directly from the tooth in 79% of the cases. On the other hand, the coincidence between direct and radiographic measurements was only 52% (p=0.05). Conclusions: The use of EAL in primary molars can be useful to determine root length, which in turn would lead to better pulpectomy treatments and lower the risk of damage of permanent dental germs.
dentistry, electronic apex locator, endodontics, pediatric dentistry, primary teeth, pulpectomy, root lengthdientes primarios, endodoncia, localizador apical electrónico, longitud radicular, odontología, odontología pediátrica, pulpectomíadentes decíduos, endodontia, localizador apical eletrônico, comprimento da raiz, odontologia, odontologia pediátrica, pulpectomia
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