Evaluación de las técnicas de adhesión a zirconia
Fecha
2020-10
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Universidad de Guayaquil. Facultad Piloto de Odontología
Resumen
La introducción de monómeros funcionales en los sistemas adhesivos como en los imprimadores para zirconia/metal, promueven la unión química interactuando con el calcio (hidroxiapatita) de la dentina, y en la superficie de la restauración por los iones metálicos. Estudios demostraron que el 10-MDP, es fundamental para lograr adhesión a zirconia y proveer una unión estable en el tiempo, a diferencia de una unión mecánica lograda con cementos a base de fosfato de zinc y ionómeros de vidrio. Además, la cementación adhesiva a zirconia brindó mejores niveles de adhesión porque aparte de la unión química, existe una unión micromecánica, la cual mediante el arenado con diversos tipos y tamaños de partículas crean micro retenciones para fortalecer la unión química. Por consiguiente, el objetivo general del trabajo fue analizar las técnicas de adhesión a zirconia, en donde se estudiarán protocolos de cementación convencional vs cementación adhesiva. El enfoque de la investigación fue de tipo bibliográfico usando como principales métodos el histórico – lógico y descriptivo, utilizando como técnicas la compilación de información, revisión bibliográfica y análisis de las fuentes. Finalizando, el autor concluyó que el arenado con partículas de óxido de aluminio en conjunto con un primer de zirconia, es la técnica más confiable y segura para lograr altos valores adhesivos a la zirconia. Se recomienda revisar constantemente información científica acerca de materiales y protocolos que demuestren efectividad y garanticen una adhesión duradera y estable a la cerámica de zirconia.
The introduction of functional monomers in adhesive systems such as zirconia/metal primers, promotes chemical bonding by interacting with the calcium (hydroxyapatite) in the dentin, and on the surface of the restoration by the metal ions. Studies have shown that 10-MDP is critical for achieving adhesion to zirconia and providing a stable bond over time, as opposed to a mechanical bond achieved with zinc phosphate-based cements and glass ionomers. In addition, adhesive zirconia cementation provided better levels of adhesion because apart from the chemical bond, there is a micromechanical bond, which by sanding with various types and sizes of particles creates micro retentions to strengthen the chemical bond. Therefore, the general objective of the work was to analyze the techniques of adhesion to zirconia, where protocols of conventional cementation vs. adhesive cementation will be studied. The approach of the research was of bibliographic type using as main methods the historical - logical and descriptive, using as techniques the compilation of information, bibliographic review and analysis of the sources. Finally, the author concluded that sandblasting with aluminum oxide particles in conjunction with a zirconia primer is the most reliable and safe technique to achieve high adhesive values to zirconia. It is recommended to constantly review scientific information about materials and protocols that demonstrate effectiveness and guarantee a lasting and stable adhesion to zirconia ceramics.
The introduction of functional monomers in adhesive systems such as zirconia/metal primers, promotes chemical bonding by interacting with the calcium (hydroxyapatite) in the dentin, and on the surface of the restoration by the metal ions. Studies have shown that 10-MDP is critical for achieving adhesion to zirconia and providing a stable bond over time, as opposed to a mechanical bond achieved with zinc phosphate-based cements and glass ionomers. In addition, adhesive zirconia cementation provided better levels of adhesion because apart from the chemical bond, there is a micromechanical bond, which by sanding with various types and sizes of particles creates micro retentions to strengthen the chemical bond. Therefore, the general objective of the work was to analyze the techniques of adhesion to zirconia, where protocols of conventional cementation vs. adhesive cementation will be studied. The approach of the research was of bibliographic type using as main methods the historical - logical and descriptive, using as techniques the compilation of information, bibliographic review and analysis of the sources. Finally, the author concluded that sandblasting with aluminum oxide particles in conjunction with a zirconia primer is the most reliable and safe technique to achieve high adhesive values to zirconia. It is recommended to constantly review scientific information about materials and protocols that demonstrate effectiveness and guarantee a lasting and stable adhesion to zirconia ceramics.
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ADHESION DENTAL, ZIRCONIO, CEMENTACION