Distancia entre los orificios de entrada a los conductos radiculares en los primeros molares maxilares y mandibulares

this in vivo study evaluates the distance between the entrance to each root canal in 60 first molars, 30 maxillary and 30 mandibular, with vital pulp. upon pulp chamber opening and canal orifice location, using an intraoral camera and measuring software, photographs were taken of the pulp floor and the distances between orifices determined. specimens were grouped according to number of canal orifices found, 3 or 4. statistical analyses showed that in lower molars having 3 canal orifices a homogeneous group was formed with 3 distances mb-ml, ml-dl and mb-db, these being significantly larger than db-dl. in upper molars with 3 orifices, the distances differed. means of molars showing 4 orifices comprised 3 homogeneous groups.