The purpose of this study was to evaluate in vitro the curing effect of a light-emitting diode LED unit and conventional halogen light on the marginal leakage of a pit and fissure sealant. We used 40 caries-free permanent premolars recently extracted, which were randomly divided into two groups (n = 20), sealed with a resin based fissure sealant, Helioseal F (Ivoclar Vivadent), according to the manufacturer patterns, then photopolymerized using either L.E.D. light or conventional halogen light (control group). The specimens were stored in distilled water at 37 ° C for 48 hours, and covered all tooth surfaces with nail enamel except for a margin of 2 mm around the sealants, the samples were then immersed in a 1% blue methylene dye solution as a marginal leakage indicator, and subjected to thermocycling regimen of 500 cycles between 5 °C and 60 °C. After removal of the dye solution spec...

The purpose of this study was to evaluate in vitro the curing effect of a light-emitting diode LED unit and conventional halogen light on the marginal leakage of a pit and fissure sealant. We used 40 caries-free permanent premolars recently extracted, which were randomly divided into two groups (n = 20), sealed with a resin based fissure sealant, Helioseal F (Ivoclar Vivadent), according to the manufacturer patterns, then photopolymerized using either L.E.D. light or conventional halogen light (control group). The specimens were stored in distilled water at 37 ° C for 48 hours, and covered all tooth surfaces with nail enamel except for a margin of 2 mm around the sealants, the samples were then immersed in a 1% blue methylene dye solution as a marginal leakage indicator, and subjected to thermocycling regimen of 500 cycles between 5 °C and 60 °C. After removal of the dye solution spec...

Objective: to compare in vitro the marginal seal degree of composite resin restorations photopolomerized with L.E.D light and conventional halogen light, was the objective of this research.It was used 20 healthy molars recently extracted, in each of them, standardized dimensions class V cavities were prepared in the buccal and palatal aspects. Both cavities were filled with nanoparticles composite resin, Filteck Z350 and Single Bond adhesive (3M). Vestibular restaurations were light cured using L.E.D light, and palatal with conventional halogen light. Once restored, the molars were maintained for 48 hours at 37 °C and 100 % humidity. Samples were subjected to 1 % blue methylene solution thermocycling regimen, and then the marginal leakage degree was assessed, making a palatal-vestibule coronal cut, and the evaluation with a stereoscopic microscopy. The frequency of specimens that leakag...

Objective: to compare in vitro the marginal seal degree of composite resin restorations photopolomerized with L.E.D light and conventional halogen light, was the objective of this research.It was used 20 healthy molars recently extracted, in each of them, standardized dimensions class V cavities were prepared in the buccal and palatal aspects. Both cavities were filled with nanoparticles composite resin, Filteck Z350 and Single Bond adhesive (3M). Vestibular restaurations were light cured using L.E.D light, and palatal with conventional halogen light. Once restored, the molars were maintained for 48 hours at 37 °C and 100 % humidity. Samples were subjected to 1 % blue methylene solution thermocycling regimen, and then the marginal leakage degree was assessed, making a palatal-vestibule coronal cut, and the evaluation with a stereoscopic microscopy. The frequency of specimens that leakag...

The purpose of this study was to evaluate the solubility of gutta-percha in three solvents used in endodontics: xylol of traditional use, and the essential oils: eucalyptol and orange oil, of recent use, given the frequent need to remove the obturation material in radicular retreatment procedures. One hundred twenty samples of gutta-percha were prepared in a standardized way in small cylinders, being divided equally into four groups for immersion in three experimental solvents and distilled water (control group) during 2.5 and 10 minutes at room temperature. The solvent effect was recorded in grams of weight loss, calculating the difference between pre and post-immersion samples weight for each experimental time. The results were analyzed and compared by Tukey test (p <0.05). Under the conditions of this study it is concluded that, all experimental solvents were effective to dissolve ...

The purpose of this study was to evaluate the solubility of gutta-percha in three solvents used in endodontics: xylol of traditional use, and the essential oils: eucalyptol and orange oil, of recent use, given the frequent need to remove the obturation material in radicular retreatment procedures. One hundred twenty samples of gutta-percha were prepared in a standardized way in small cylinders, being divided equally into four groups for immersion in three experimental solvents and distilled water (control group) during 2.5 and 10 minutes at room temperature. The solvent effect was recorded in grams of weight loss, calculating the difference between pre and post-immersion samples weight for each experimental time. The results were analyzed and compared by Tukey test (p <0.05). Under the conditions of this study it is concluded that, all experimental solvents were effective to dissolve ...

Objetivo. Conocer el nivel de relación entre los aspectos cognitivos y procedimentales en el diseño y delimitación de las líneas para la confección del rodete de oclusión y contorno en prótesis completa, en estudiantes de odontología. Materiales y métodos. La muestra estuvo conformada por 134 estudiantes, de los cuales 51 fueron del sexo masculino. Se evaluó el aspecto cognitivo mediante un examen escrito, el cual fue calificado de 0 a 20 para luego subdividirlo en cinco grupos. El mismo sistema de evaluación se aplicó sobre los trabajos de diseño y graficación realizado sobre los modelos de trabajo y placas bases. Resultados. En aprestamiento procedimental no se encontró asociación significativa con el grado de conocimiento, sin embargo, un mayor número de alumnos obtuvieron un buen grado de conocimientos y la mayoría obtuvo un buen nivel de aprestamiento procedimental...

The aim of this work was to find the pattern more prevalent according to Gerber’s embriogenetic principle. A sample of 100 students of Dentistry of San Marcos University between 18 and 27 years, without alterations in the upper anterior sector, were examinated clinically, photographic analysis and diagnostic models were conducted. Statistical analysis was performed with the program SPSS 19. Results: the most common biotype (according to Mayoral) was braquifatial (50 %), followed mesofatial (44 %) and dolicofatial (6 %). We find consistent agreement with the second and third postulate of Gerber (2nd postulated: proportion between size of the central incisors and lateral incisors, is similar to proportionbe tween the base and the nasal root; and postulated 3rd: there is a relationship between the angulation of the flat incisal and nasal base line - alar index); but was no agreement with ...

Objective: Determine the relationship between the tutoring program in the course of full denture and academic performance of the students of a school of dentistry. Materials and method: The study population were students of the seventh cycle of the school of den-tistry of the San Martín de Porres University, enrolled in the course of full prosthesis tutoring program. Five tutorial sessions were needed to meet the academic needs of learning, the most requested sessions were the theoretical 85% (±14,64) the practices were less frequent (14,22 % ±14,64). Results: There was no significant difference by gender. Students who attended the educational psychology service approved 71,55% (±18,56). Conclusions: The tutoring program was beneficial since academic performance improved. Unap-proved students were of both genders, most presented academic deficiency and behavioral problems. Increased ...

The aim of this work was to find the pattern more prevalent according to Gerber’s embriogenetic principle. A sample of 100 students of Dentistry of San Marcos University between 18 and 27 years, without alterations in the upper anterior sector, were examinated clinically, photographic analysis and diagnostic models were conducted. Statistical analysis was performed with the program SPSS 19. Results: the most common biotype (according to Mayoral) was braquifatial (50 %), followed mesofatial (44 %) and dolicofatial (6 %). We find consistent agreement with the second and third postulate of Gerber (2nd postulated: proportion between size of the central incisors and lateral incisors, is similar to proportionbe tween the base and the nasal root; and postulated 3rd: there is a relationship between the angulation of the flat incisal and nasal base line - alar index); but was no agreement with ...

Objetivo: Determinar la relación entre el programa de tutoría del curso de Prótesis Completa y el rendimiento académico de los alumnos de una Facultad de Odontología. Materiales y método: La población de estudio fueron estudiantes del VII ciclo de la Facultad de Odontología de la Universidad de San Martín de Porres, inscritos en el programa de tutoría del curso de Prótesis Completa. Se necesitaron cinco sesiones tutoriales para poder satisfacer las necesidades académicas de aprendizaje. Las sesiones de mayor requerimiento fueron las teóricas 85 % (±14,64), las prácticas fueron menos frecuentes (14,22 % ±14,64). Resultados: No existió diferencia significativa por género. Los estudiantes que asistieron al servicio psicopedagógico aprobaron en un 71,55 % (±18,56). Conclusiones: El programa de tutoría resultó beneficioso ya que el rendimiento académico mejoró. Los alu...