C El Hachem1, M K Kaloustian2, W Nehme3, N Ghosn4, J C Abou Chedid5. 1. Department of Pediatric Dentistry, Faculty of Dentistry, Saint Joseph University, Beirut, Lebanon. claire.elhachem@gmail.com. 2. Department of Endodontics, Faculty of Dentistry, Saint Joseph University, Beirut, Lebanon. mkaloustian75@gmail.com. 3. Department of Endodontics, Faculty of Dentistry, Saint Joseph University, Beirut, Lebanon. 4. Department of Oral and Maxilla-Facial Radiology, Faculty of Dentistry, Saint Joseph University, Beirut, Lebanon. 5. Department of Pediatric Dentistry, Faculty of Dentistry, Saint Joseph University, Beirut, Lebanon.
Abstract
PURPOSE: This study aimed at establishing a comprehensive specification of the root canal anatomy of second primary mandibular molars using micro computed tomography (CT). METHODS: 10 s primary molars from Caucasian young patients were selected for this purpose. Micro CT imaging with a high resolution of 20 microns was performed to observe the roots and canals according to specific criteria. The Vertucci canal configuration, the presence of lateral canals and their location, the presence of an isthmus and its location, were first observed. Then, the length of the canals, their diameter in the mesio-distal and vestibulo-lingual direction, the dentinal thickness and the direction of the minimal dentinal thickness were measured. RESULTS: The mean working length was not significantly different between the canals (p = 0.710). The bucco-lingual diameter was significantly higher when the tooth had a single distal canal at the coronal (p < 0.001), middle (p < 0.001) and apical (p = 0.012) levels. The root dentin thickness on the distal wall of the mesial root and the mesial wall of the distal roots were reduced, respectively, from the coronal to the apical thirds. CONCLUSIONS: The results obtained in this case series report clearly show a complex, sometimes unpredictable, anatomy with dangerous areas where dentin is extremely thin. The plethoric presence of anastomoses, large bands of isthmus, lateral canals at all levels induces the need for the development of instruments specific to pulpectomies on primary teeth.
PURPOSE: This study aimed at establishing a comprehensive specification of the root canal anatomy of second primary mandibular molars using micro computed tomography (CT). METHODS: 10 s primary molars from Caucasian young patients were selected for this purpose. Micro CT imaging with a high resolution of 20 microns was performed to observe the roots and canals according to specific criteria. The Vertucci canal configuration, the presence of lateral canals and their location, the presence of an isthmus and its location, were first observed. Then, the length of the canals, their diameter in the mesio-distal and vestibulo-lingual direction, the dentinal thickness and the direction of the minimal dentinal thickness were measured. RESULTS: The mean working length was not significantly different between the canals (p = 0.710). The bucco-lingual diameter was significantly higher when the tooth had a single distal canal at the coronal (p < 0.001), middle (p < 0.001) and apical (p = 0.012) levels. The root dentin thickness on the distal wall of the mesial root and the mesial wall of the distal roots were reduced, respectively, from the coronal to the apical thirds. CONCLUSIONS: The results obtained in this case series report clearly show a complex, sometimes unpredictable, anatomy with dangerous areas where dentin is extremely thin. The plethoric presence of anastomoses, large bands of isthmus, lateral canals at all levels induces the need for the development of instruments specific to pulpectomies on primary teeth.
Authors: A C Fumes; M D Sousa-Neto; G B Leoni; M A Versiani; L A B da Silva; R A B da Silva; A Consolaro Journal: Eur Arch Paediatr Dent Date: 2014-02-22
Authors: Patricia A Reynolds; Ana N Donaldson; Christina Liossi; Jonathon T Newton; Nicholas K Donaldson; Ramiro Arias; Preemal Haria; Corinne Huntington; Reham Alharatani; Marie Therese Hosey Journal: Int J Paediatr Dent Date: 2018-11-17 Impact factor: 3.455