title: Morphologic features of the root canal system of the maxillary fourth premolar and the mandibular first molar in dogs.
abstract: Root canal morphology was evaluated in 72 maxillary fourth premolar and 59 mandibular first molar teeth. An apical delta was present in all roots (n = 334). The apical delta represented approximately 12-18% of the total root length for all roots. Non-apical ramifications from the main canal were observed in 25.1% of roots. Secondary canal(s) were present in 20.6% of roots, while lateral canal(s) were present in 6.9% of roots. The distal root of the maxillary fourth premolar had the highest incidence (47.2%) of non-apical ramifications. Overall, 68.0 and 20.4% of maxillary fourth premolar and mandibular first molar teeth had non-apical ramifications, respectively. The prevalence and location of non-apical ramifications may influence clinical decision making when performing endodontic therapy.
authors.affiliation: Department of Surgery (Hernández, Negro), Faculty of Veterinary Sciences, University of Buenos Aires, Chorroarín 280, C1427CW0 Buenos Aires.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Hernández
authors.forename: V B
authors.initials: VB
authors.lastname: Negro
authors.forename: B M
authors.initials: BM
authors.lastname: Maresca
mesh_terms: D000818:Animals; D001641:Bicuspid / Q000033:anatomy & histology* / Q000294:innervation; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D004285:Dogs / Q000033:anatomy & histology*; D005260:Female; D008297:Male; D008334:Mandible / Q000033:anatomy & histology; D008437:Maxilla / Q000033:anatomy & histology; D008963:Molar / Q000033:anatomy & histology* / Q000294:innervation; D019227:Tooth Apex / Q000033:anatomy & histology; D014092:Tooth Root / Q000033:anatomy & histology