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Objectives: Estimate the root canals of primary first lower molars by means of Nano computed tomography (Nano-CT). Material and methods: The sample consisted of 10 inferior primary molar teeth. The teeth were scanned by Nano-CT and the resulting images were analyzed with the On-Demand 3D software, considering among the evaluation the anatomical characteristics of the root canals and surface area of the root canals throughout the root length. For the measurement of the larger and smaller diameter of the root canals the statistical tests were central trend measures, with a significance level of 5%.  Results: In the distal root, vestibular mesial and lingual mesial , the size of the root canal with the highest average of the cervical region (D0) was 1.30, 1.00, 1.08 mm, respectively. The diameter to the deepest length (D11) for the same canals was 0.29, 0.22, 0.18 mm. The measurement o...

Objectives: Estimate the root canals of primary first lower molars by means of Nano computed tomography (Nano-CT). Material and methods: The sample consisted of 10 inferior primary molar teeth. The teeth were scanned by Nano-CT and the resulting images were analyzed with the On-Demand 3D software, considering among the evaluation the anatomical characteristics of the root canals and surface area of the root canals throughout the root length. For the measurement of the larger and smaller diameter of the root canals the statistical tests were central trend measures, with a significance level of 5%.  Results: In the distal root, vestibular mesial and lingual mesial , the size of the root canal with the highest average of the cervical region (D0) was 1.30, 1.00, 1.08 mm, respectively. The diameter to the deepest length (D11) for the same canals was 0.29, 0.22, 0.18 mm. The measurement o...

Objetivo: Determinar la longitud y el diámetro radicular de los incisivos laterales superiores deciduos a través de la Tomografía Computarizada Cone Beam. Metodología: Estudio descriptivo y transversal. Se recolectaron 20 incisivos deciduos laterales superiores recién extraídos o avulsionados de la clínica odontológica de la Universidad Nacional Mayor de San Marcos, en el año 2016. Los dientes fueron escaneados utilizando la Tomografía Cone Beam, se empleó el equipo OP300 Maxio, Orthopantomograph ®. Las imágenes resultantes fueron analizadas en el software de análisis de imagen ONDEMAND3DDENTAL. Se midió el eje axial, la longitud de la corona, raíz y la longitud total de la pieza dentaria. Para el análisis estadístico se utilizó el software Stata v14 (Stata Corporation College Station, Texas), previo al análisis los datos obtenidos fueron sometidos a la prueba de norm...

Objetivo: Determinar la longitud y el diámetro radicular de los incisivos laterales superiores deciduos a través de la Tomografía Computarizada Cone Beam. Metodología: Estudio descriptivo y transversal. Se recolectaron 20 incisivos deciduos laterales superiores recién extraídos o avulsionados de la clínica odontológica de la Universidad Nacional Mayor de San Marcos, en el año 2016. Los dientes fueron escaneados utilizando la Tomografía Cone Beam, se empleó el equipo OP300 Maxio, Orthopantomograph ®. Las imágenes resultantes fueron analizadas en el software de análisis de imagen ONDEMAND3DDENTAL. Se midió el eje axial, la longitud de la corona, raíz y la longitud total de la pieza dentaria. Para el análisis estadístico se utilizó el software Stata v14 (Stata Corporation College Station, Texas), previo al análisis los datos obtenidos fueron sometidos a la prueba de norm...

Objective: To report the use of toothpaste in Peruvian children under 12 years old, during the period of 2016 - 2018. Materials and methods: The study was descriptive, longitudinal and retrospective, using the records of the ENDES database, Peru, during 2016-2018. The sample was multistage, probabilistic and stratified, consisting of 118,716 records of children under 12 years of age. The variables were: use of toothpaste, fluoride concen-tration, department, geographical area and natural region. A descriptive analysis of the absolute and relative frequencies was performed. Results: Of the participants, they brushed their teeth, 88%; they brush their teeth 2 times a day, 40%; they used toothpaste, 98%; they used toothpaste with a fluorine concentration of 1000ppm or more, 44.6% (n = 15 376), 43.2% (n = 14 545) and 44% (n = 16 227), for the years 2016, 2017 and 2018, respectively. In the d...

Objective: To report the use of toothpaste in Peruvian children under 12 years old, during the period of 2016 - 2018. Materials and methods: The study was descriptive, longitudinal and retrospective, using the records of the ENDES database, Peru, during 2016-2018. The sample was multistage, probabilistic and stratified, consisting of 118,716 records of children under 12 years of age. The variables were: use of toothpaste, fluoride concen-tration, department, geographical area and natural region. A descriptive analysis of the absolute and relative frequencies was performed. Results: Of the participants, they brushed their teeth, 88%; they brush their teeth 2 times a day, 40%; they used toothpaste, 98%; they used toothpaste with a fluorine concentration of 1000ppm or more, 44.6% (n = 15 376), 43.2% (n = 14 545) and 44% (n = 16 227), for the years 2016, 2017 and 2018, respectively. In the d...