Resistencia a la tensiĆ³n diametral de resinas compuestas de nanorrelleno polimerizadas con dos fuentes luminosas, estudio experimental in vitro
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Fecha
2011
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Profesor/a GuĆa
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es
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Universidad AndrƩs Bello
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Licencia CC
Licencia CC
Resumen
Planteamiento del problema: Debido fundamentalmente a sus propiedades estƩticas,
las resinas compuestas son ampliamente usadas como material restaurador. La
pregunta es Āæinfluye el color de la resina compuesta de nanorrelleno en el grado de
polimerizaciĆ³n que alcance? ĀæInfluye el tipo de lĆ”mpara utilizada para su
fotopolimerizaciĆ³n en el comportamiento mecĆ”nico de las resinas compuestas?
En la literatura existen estudios que nos pueden ayudar a esclarecer estas
interrogantes; sin embargo todos ellos apuntan a las resinas compuestas hĆbridas y
microhĆbridas. La literatura es escasa acerca del comportamiento mecĆ”nico de las
resinas compuestas de nanorrelleno.
Objetivo: Determinar si existen diferencias significativas en la resistencia a la tensiĆ³n
diametral entre resinas compuestas de nanorelleno de distinto color fotopolimerizadas
con lĆ”mparas halĆ³genas, en comparaciĆ³n con aquellas fotopolimerizadas con lĆ”mparas
LEO.
Materiales y MĆ©todos: Se realizĆ³ un estudio in vitro en el que se comparĆ³ la
resistencia a la tensiĆ³n diametral de dos Resinas Compuestas de nanorrelleno de
distinto color, A2 y A3.5, sometidas a fotopolimerizaciĆ³n con dos unidades distintas, una
lĆ”mpara HalĆ³gena y una lĆ”mpara LED.
Se utilizaron 40 cuerpos de prueba, 20 de los cuales se sometieron a
fotopolimerizaciĆ³n utilizando lĆ”mpara HalĆ³gena, 1 O de cada color, y los otros 20 fueron
fotopolimerizados utilizando la lƔmpara LED, siguiendo el mismo procedimiento para
ambos grupos de muestras. Las muestras se dejaron en un ambiente de humedad y 37Ā° de temperatura por un
periodo de 15 dĆas hasta el momento de la prueba fĆsica de compresiĆ³n.
Posteriormente las pruebas fueron testeadas en una mƔquina universal de ensayos
modelo T100 hasta el momento de su fractura, registrƔndose los valores mƔximos.
Resultados: Se obtuvieron diferencias estadĆsticamente significativas entre los grupos
A2 halĆ³gena y A3.5 LED, A2 halĆ³gena y A2 LED. ; no existiendo diferencias
estadĆsticamente significativas entre los grupos A3.5 halĆ³gena y A2 halĆ³gena, A3.5
halĆ³gena y A 3.5 LED, A 3.5 LED y A2 LED.
Conclusiones:
ā¢ No existen diferencias significativas en la resistencia a la tensiĆ³n diametral entre
resinas compuestas de nanorrelleno de distinto color.
ā¢ Existen diferencias significativas en la resistencia a la tensiĆ³n diametral entre
resinas compuestas de nanorrelleno fotopolimerizadas con lĆ”mpara halĆ³gena en
comparaciĆ³n con aquellas fotopolimerizadas con lĆ”mpara LED.
ā¢ Las resinas compuestas de nanorrelleno fotopolimerizadas con lĆ”mpara
halĆ³gena presentan valores mayores en la resistencia a la tensiĆ³n diametral en
relaciĆ³n a aquellas fotopolimerizadas con lĆ”mpara LED.
Exposition of the problem: The question is does it influence the color of the compound resin of nanorrelleno in the degree of polymerization that reaches? Does it influence the type of lamp used for his photopolymerization in the mechanical behavior of the compound resins? In the literature there exist studies that can help us to clarify questioning these; nevertheless all of them point at the compound hybrid and micro-hybrid resins. The literature is scanty brings over of the mechanical behavior of the compound resins of nanorrelleno. Target: To determine if significant differences exist in the resistance to the diametrical the tension between compound resins of nanorelleno of different color photopolymerized with lamps halĆ³genas, in comparison with those photopolymerized with LEO lamp. Materials and Methods: An in vitro study comparing the diametrical tension resistance of two different color nanorrelleno compound resins submitted to photopolymerization with two different units, a halogen lamp, and an LED lamp. 40 body test was used, 20 of then surrendered to photopolymerization using the halogen lamp, 1 O of each color. Then the other 20 were photopolymerized using the LEO lamp following the same procedure for both groups of samples. The samples were left in an environment of dampness and 37Ā°C temperature for 15 days up to the moment of the physical compression test. Later the samples were submitted in a universal model T100 compressional and tractional machina test up to the moment of the fracture. Maximum values were registered. Results: There were obtained statistically significant differences between the groups A2 halĆ³gena and A3.5 LED, A2 halĆ³gena and A2 LED.; not existing statistically significant differences between the groups A3.5 halĆ³gena and A2 halĆ³gena, A3.5 halĆ³gena and 3.5 LEO, 3.5 LED, and A2 LED. Conclusions: ā¢ Significant differences do not exist in the resistance to the diametrical tension between(among) compound resins of nanorrelleno of a different colors. ā¢ Significant differences exist in the resistance to the diametrical tension between(among) compound resins of nanorrelleno photopolymerized with lamp halĆ³gena in comparison with those photopolymerized with lamp LEO. ā¢ The compound resins of nanorrelleno photopolymerized with lamp halogen LED presents major values in the resistance to the diametrical tension in relation to those photopolymerized with lamp.
Exposition of the problem: The question is does it influence the color of the compound resin of nanorrelleno in the degree of polymerization that reaches? Does it influence the type of lamp used for his photopolymerization in the mechanical behavior of the compound resins? In the literature there exist studies that can help us to clarify questioning these; nevertheless all of them point at the compound hybrid and micro-hybrid resins. The literature is scanty brings over of the mechanical behavior of the compound resins of nanorrelleno. Target: To determine if significant differences exist in the resistance to the diametrical the tension between compound resins of nanorelleno of different color photopolymerized with lamps halĆ³genas, in comparison with those photopolymerized with LEO lamp. Materials and Methods: An in vitro study comparing the diametrical tension resistance of two different color nanorrelleno compound resins submitted to photopolymerization with two different units, a halogen lamp, and an LED lamp. 40 body test was used, 20 of then surrendered to photopolymerization using the halogen lamp, 1 O of each color. Then the other 20 were photopolymerized using the LEO lamp following the same procedure for both groups of samples. The samples were left in an environment of dampness and 37Ā°C temperature for 15 days up to the moment of the physical compression test. Later the samples were submitted in a universal model T100 compressional and tractional machina test up to the moment of the fracture. Maximum values were registered. Results: There were obtained statistically significant differences between the groups A2 halĆ³gena and A3.5 LED, A2 halĆ³gena and A2 LED.; not existing statistically significant differences between the groups A3.5 halĆ³gena and A2 halĆ³gena, A3.5 halĆ³gena and 3.5 LEO, 3.5 LED, and A2 LED. Conclusions: ā¢ Significant differences do not exist in the resistance to the diametrical tension between(among) compound resins of nanorrelleno of a different colors. ā¢ Significant differences exist in the resistance to the diametrical tension between(among) compound resins of nanorrelleno photopolymerized with lamp halĆ³gena in comparison with those photopolymerized with lamp LEO. ā¢ The compound resins of nanorrelleno photopolymerized with lamp halogen LED presents major values in the resistance to the diametrical tension in relation to those photopolymerized with lamp.
Notas
Tesis (Cirujano Dentista, EspecializaciĆ³n en ClĆnica Integral del Adulto)
Palabras clave
Materiales Dentales, Materiales Biocompatibles, Chile, RestauraciĆ³n Dental