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Objective: To compare flexural and compres-sive strength of two microhibrid composite resins.


Methods: A quasi-experimental in vitro study was performed to evaluate physical-mechanical properties of Miris®, (Coltene) and Esthet–X®, (Dentsply)


Results: Flexural resistance strength test showed higher values for Miris® than for Esthet-X® (P=0.0286). The elastic modulus (Young) test presented higher results for Miris® (P= 0.0286). Compressive resistance strength results were higher for Esthet-X® than for Mi-ris® (P=0.0159). When the tensional strength test was applied to the microhibrid resins, no reliable data were obtained.


Conclusions: Higher Flexural modulus was co-rrelated to lower deformation values, as showed by Miris®. In contrast, its compressive values were lower than Esthet-X®. Miris® was more rigid than Esthet-X®, but Esthet-X® resisted higher compressive load. Both systems showed acceptable physical-mechanical values to be considered for posterior restorations. Limited use of these resins to conservative preparations in bicuspids and molars should be considered.

Herney Garzón, Universidad del Valle. Cali, Colombia.

Profesor. Escuela de Odontología.

Natalia Arce Muñoz, Universidad del Valle. Cali, Colombia

Estudiante último año de Odontología. Escuela de Odontología.

Carolina Cabezas González, Universidad del Valle. Cali, Colombia

Estudiante último año de Odontología. Escuela de Odontología.

Elizabeth Posada Ayala, Universidad del Valle. Cali, Colombia.

Estudiante último año de Odontología. Escuela de Odontología

Lorena López Moreno , Universidad del Valle. Cali, Colombia

Estudiante último año de Odontología. Escuela de Odontología

Garzón, H., Arce Muñoz, N., Cabezas González, C., Posada Ayala, E., & López Moreno , L. (2005). Comparación de la resistencia de dos resinas microhíbridas para la restauración dental. Revista Estomatología, 13(2). https://doi.org/10.25100/re.v13i2.5581