Escribano, NuriaDe la Macorra, José Carlos2025-07-082025-07-082006-10Escribano, N., & de la Macorra, J. C. (2006). Microtensile bond strength of self-adhesive luting cements to ceramic. The journal of adhesive dentistry, 8(5), 337–341.1461-5185 (print)1757-9988 (online)https://hdl.handle.net/10115/91657Este estudio evaluó la resistencia de unión por microtracción de tres cementos autoadhesivos utilizados para fijar discos cerámicos IPS Empress II a la dentina de dientes humanos perfundidos. Se aplicó un análisis estadístico para comparar los materiales, ajustando las diferencias en las áreas de unión. Los resultados mostraron diferencias significativas entre los cementos, siendo Panavia F el que presentó la mayor resistencia, seguido por Multilink System y RelyX Unicem, este último con los valores más bajos al no requerir pretratamiento de la dentina.Purpose: To test the null hypothesis that three self-adhesive luting materials had the same microtensile bond strength when used to lute ceramic IPS Empress II disks to the dentin of perfused teeth. Materials and Methods: Occlusal enamel and the roots of 9 human third molars were removed and crown segments connected to a perfusion system (30 cm H2O). Nine ceramic disks (IPS Empress II) were prepared, conditioned with 5% FH (20 s), rinsed with water, and air dried. A primer silane agent was applied (Monobond-S) for 60 s and air dried. Teeth were bonded to disks using one of three materials: Multilink System, RelyX Unicem, or Panavia F light. Specimens were vertically sectioned to obtain square bars. Each bar was fixed to a rigid custom-made tensile device and submitted to tensile force until debonding. Microtensile bond strength (μTBS) was given in MPa. Because the means of bonded areas (BA) were different between groups, it was impossible to compare μTBS results directly. Thus, the regression line TBS(MPa) = -2.15 + [19.92 / BA(mm2)] was calculated to correlate μTBS results and BA. Residuals (difference between the value estimated by the regression line and the actual value) were stored as “distances”. ANOVA was performed to examine the statistical significance of differences between group’s means distances, and the Tamhane’s post hoc test was used to locate eventual differences. Results: The number of bars used in the analysis was n = 147. Residuals should not be statistically different if the null hypothesis (represented by the regression line) was credible. ANOVA showed statistically significant differences between the distances of the groups’ means (p < 0.00001). Tamhane’s post hoc test (p < 0.05) showed that different group means were RelyX < Multilink < Panavia F. Conclusion: The null hypothesis was rejected: materials showed different tensile bond strengths. Panavia F obtained highest bonding values, followed by Multilink System. RelyX Unicem, the only material that does not require pretreatment of dentin, achieved the lowest TBS values under these study conditions.enAcid Etching, Dental Aluminum Silicateschemistry Ceramicschemistry* Dental Bonding* Dental Cementschemistry Dental Porcelainchemistry* Dental Stress Analysisinstrumentation Dentinultrastructure Humans Hydrofluoric Acidchemistry Resin Cementschemistry* Silaneschemistry Stress, Mechanical Surface Properties Tensile StrengthArticleinfo:eu-repo/semantics/closedAccessPMID: 17080882