Objective: This study is an in vitro evaluation of three-dimensional root canal sealing ability of three obturation techniques: Lateral condensation, Tagger’s hybrid technique and thermoplastic Beefill 2 in 1 in mandible teeth. Methodology: it was used 30 first lower premolars which were randomly divided into three groups of 10 each. Root canals were cleaned, disinfected and shaping. The groups of Lateral condensation technique and Beefill 2 in 1 were prepared with Mtwo System, and Tagger’s hybrid technique with the University of Oregon Crown Down technique. Samples were prepared and cross sections were performed in the third cervical (3 mm), medium (6 mm) and apical (9mm), and then taken to the stereoscopic microscope. Results: Statistical analysis was performed with Chi square and comparison of proportions with the Z tests on 5% level of significance. Group 3 (lateral condensation)...

Object: evaluate the formation of microcracks in the dental root canal after chemical mechanical pre-paration with Protaper Universal, Protaper Next and TF Adaptive systems. Then to determine which systems generates fewer microcracks after chemical mechanical preparation. Materials and méthod: 38 freshly extracted mandibular premolars, which have a single root canal were selected. The sample was divided into three for each chemical mechanical preparation system experimental groups (n = 11). Group A: Protaper Universal Group B: Protaper Next, Group C: Adaptive TF. And a fourth group (n = 5) corresponding to the negative control group. After chemical mechanical preparation horizontal slices 4mm, 8mm and 12mm from the apex, which were evaluated with a 20x stereomicroscope where the presence of microcracks was determined were performed. Results: The Protaper Universival produces microcracks...

Objective: This study is an in vitro evaluation of three-dimensional root canal sealing ability of three obturation techniques: Lateral condensation, Tagger’s hybrid technique and thermoplastic Beefill 2 in 1 in mandible teeth. Methodology: it was used 30 first lower premolars which were randomly divided into three groups of 10 each. Root canals were cleaned, disinfected and shaping. The groups of Lateral condensation technique and Beefill 2 in 1 were prepared with Mtwo System, and Tagger’s hybrid technique with the University of Oregon Crown Down technique. Samples were prepared and cross sections were performed in the third cervical (3 mm), medium (6 mm) and apical (9mm), and then taken to the stereoscopic microscope. Results: Statistical analysis was performed with Chi square and comparison of proportions with the Z tests on 5% level of significance. Group 3 (lateral condensation)...

Objetivo :La presente investigación buscó evaluar la formación de microfisuras dentinarias en el conducto radicular después de la preparación químico mecánica con los sistemas Protaper Universal, Protaper Next y TF Adaptive. Para luego poder determinar cual de los sistemas genera menor número de microfisuras luego de la preparación quimico mecanica. Materiales y método: Se seleccionaron 38 premolares mandibulares recién extraidos, que tuvieran un solo conducto radicular. La muestra se dividio en tres grupos experimentales (n= 11) correspondiente a cada sistema de preparación químico mecánica. Grupo A: Protaper Universal, Grupo B: Protaper Next, Grupo C: TF Adaptive. Y un cuarto grupo (n=5) que correspondía al grupo de control negativo. Luego de la preparación químico mecánica se realizaron cortes horizontales a 4mm, 8mm y 12mm desde el ápice, los cuales fueron evaluado...

La flora de los conductos con fracaso de tratamiento endodóntico está formada por un limitado número de especies microbianas predominantemente gram positivas. Los microorganismos predominantes en piezas dentarias con periodontitis apical son los Streptococo no mutans, Enterococcus, Lactobacillus y Candida, los cuales al parecer sobreviven al tratamiento quimio-mecánico del conducto radicular. Uno de estos microorganismos, el Enterococcus faecalis, ha sido identificado como causa frecuente de infección del sistema de conductos radiculares en dientes con fracaso en el tratamiento endodóntico. Es probablemente la especie que mejor puede adaptarse y tolerar las condiciones exigentes en el conducto radicular obturado. Su erradicación con preparación químicomecánica, desinfección por medio de soluciones irrigantes y medicación intraconducto es difícil. El objetivo de esta investig...

The C-shaped root canal system is an anatomical variation usually found in second mandibular molar with fused roots, present a transverse morphology that describes an arc of 180º or more, with a single taped hole orifice. The present clinical case describes the endodontic treatment with last generation equipments of a mandibular molar with C- shaped type IV and fork at apical level in a male patient that has pain to percussion, palpation and the topographic Cone Beam Tomography (CBCT) examination confirms the anatomical variation of the tooth code 47. The diagnosis was previously initiated treatment with symptomatic apical periodontitis. The retreatment of the canals using the preflaring before using the Reciproc® System R25, for the biomechanical preparation technique, calcium hydroxide root canal medication was prescribed for 7 days, sodium hypochlorite as passive irrigation with and...

The C-shaped root canal system is an anatomical variation usually found in second mandibular molar with fused roots, present a transverse morphology that describes an arc of 180º or more, with a single taped hole orifice. The present clinical case describes the endodontic treatment with last generation equipments of a mandibular molar with C- shaped type IV and fork at apical level in a male patient that has pain to percussion, palpation and the topographic Cone Beam Tomography (CBCT) examination confirms the anatomical variation of the tooth code 47. The diagnosis was previously initiated treatment with symptomatic apical periodontitis. The retreatment of the canals using the preflaring before using the Reciproc® System R25, for the biomechanical preparation technique, calcium hydroxide root canal medication was prescribed for 7 days, sodium hypochlorite as passive irrigation with and...

Depression, affective disorder of sadness and discouragement with cognitive and behavioral repercussion. The demanding academic environment can trigger depressive symptoms. Objective: The aim of study was to determine the prevalence of depressive symptoms in undergraduated and graduated dental student and factors associated with this. Methodology: Cross-sectional epidemiological design. A stratified random sample of 190 students was selected. To evaluate depressive symptoms was used the abbreviated Spanish version of Zung scale with cutoff 22. Descriptive statistics, bivariate analysis with Chisquare test and multivariate binary logistic regression was applied. Results: 49.5% of dental students had depressive symptoms. The higher rate had female students (60.4% of female students and 37.1% of male OR 2.58 95% CI 1.44 to 4.65). Associated factors with depressive symptoms: dissatisfaction ...

La depresión es un trastorno afectivo de tristeza y desánimo a nivel cognitivo como conductual. El exigente ambiente universitario puede desencadenar sintomatología depresiva. Objetivo: El objetivo del estudio fue determinar la prevalencia de sintomatología depresiva en estudiantes de odontología de pregrado y posgrado así como los factores asociados a esta sintomatología. Metodología: Diseño epidemiológico transversal. Se seleccionó una muestra aleatoria estratificada de 190 estudiantes. Para evaluar la sintomatología depresiva se utilizó la versión en español de la escala de Zung abreviada con punto de corte 22. Se aplicó análisis estadístico descriptivo, bivariado con la prueba Chi cuadrado y multivariado de regresión logística binaria. Resultados: Presentaron sintomatología depresiva 49,5 % de los estudiantes de odontología. Mayor fue la frecuencia entre estudia...

Objective: This research aims to analyze the knowledge, application and assessment about the Information and Communication Technology (ICT) of Web 2.0 in education. The Web 2.0 consider the use of applications and websites willing to use the collective intelligence through social software to facilitate the learning processes. Materials and method: An observational, descriptive, cross-sectional study was conducted in a simple random pro-bability sample of 173 students and 109 undergraduate and graduate respectively and 54 teachers. The questionnaire was validated by expert judgment obtaining a coefficient Aiken V equal to 1, and Cronbach alpha reliability of 0.75. Results: The results showed that the three groups recognized communication tools as a mechanism to share information, improve teacher relationship and develop collaborative work with percentages above 80 %. The assessment of the...

Objetivo: Se tuvo como objetivo analizar el conocimiento, aplicación y apreciación sobre las tecnologías de la información y comunicación (TIC) de la web 2.0 en el ámbito educativo. Estas consideran el uso de aplicaciones y páginas web dispuestas a utilizar la inteligencia colectiva a través del software social con el fin de facilitar los procesos de aprendizaje. Materiales y método: Se desarrolló un estudio observacional, descriptivo, transversal en una muestra probabilística aleatoria simple de 173 y 109 estudiantes de pregrado y posgrado respectivamente, así como 54 docentes. El cuestionario fue validado por juicio de experto obteniendo un coeficiente V de Aiken igual a 1 y una confiabilidad Alfa de Conbrach de 0.75. Resultados: Los tres grupos estudiados reconocieron a las herramientas de comunicación como un mecanismo de compartir información, mejorar el vínculo docen...

Aim: To compare the sealing capacity of mineral trioxide (MTA®) and tricalcium silicate (Biodentine®) for retrograde filling in single-root permanent teeth. Materials and methods: Thirty-eight permanent single-root teeth with complete apical closure were selected and randomly divided into two experimental groups (n = 15): Group 1: MTA®, and Group 2: Biodentine®, in addition to positive and negative controls. Root treatment was performed with the MTWO rotary system, and obturation was carried out by means of the continuous wave thermoplastic system (Beefill) using Grossman-type cement as a sealant. Apical end apicoectomy was performed followed by the preparation of standardized retro-apical cavities and the respective fillings with MTA ® and Biodentine® according to the study group. Subsequently, the specimens were subjected to an apical filtration process of Chinese ink and transpa...