High-Temperature Hydrofluoric Acid Etching Increases the Debonding Resistance of Zirconia Copings Cemented to Titanium Bases: An In Vitro Study

doi:10.3390/ma19061191

★ Alto impactoQ1 · EngineeringImpact Factor · 4.287

AutoresSara Varas-Orozco, Esteban Pérez-Pevida, Jordi Martínez-López, José Manuel Mendes, J. Gil-Mur, Aritza Brizuela-Velasco

Por qué importa

Se ha investigado la influencia de diferentes tratamientos de la superficie interna de cofias de zirconio sobre la resistencia de la cementación a bases de titanio, un aspecto crucial en prótesis dentales sobre implantes. Se compararon el uso de silano solo, la abrasión con partículas y el grabado con ácido fluorhídrico a alta temperatura, seguido en todos los casos de silanización. Los resultados indican que el grabado ácido mejora significativamente la fuerza de retención inicial y la mantenida tras ciclado térmico, además de promover una mejor mojabilidad de la superficie y modos de fallo más favorables, sugiriendo una interfaz más robusta entre el cemento y el zirconio. Estos hallazgos son de interés clínico para optimizar la longevidad y estabilidad de las prótesis fijas implantosoportadas.

Abstract original

This study compared three internal surface treatments of zirconia copings-silane alone (control), airborne-particle abrasion followed by silane, and high-temperature hydrofluoric acid etching followed by silane-regarding initial pull-out retention strength, retention after thermocycling, failure mode assessed by scanning electron microscopy (SEM), and surface wettability. Sixty-three monolithic zirconia copings were allocated to three groups (n = 21) according to surface treatment and cemented to titanium bases with a self-adhesive resin cement. Initial pull-out tests were performed. A subset (n = 10 per group) underwent thermocycling followed by repeat testing. Failure modes were analysed by SEM, and wettability was measured using the sessile drop method. Surface roughness and crystalline phase were additionally characterized by white-light interferometry and X-ray diffraction (XRD), respectively. High-temperature acid etching produced significantly higher initial pull-out forces than airborne-particle abrasion and silane alone, with mean values 125% higher than control and 42.6% higher than airborne-particle abrasion. After thermocycling, acid-etched specimens maintained the highest retention, whereas airborne-particle abrasion showed critical loss. SEM revealed predominantly cement remnants on zirconia in the acid-etched group, indicating a stronger zirconia-cement interface. Acid etching also yielded significantly lower contact angles, reflecting improved wettability. High-temperature hydrofluoric acid etching followed by silanization provided superior and more stable retention, more favourable failure modes, and improved wettability.

Leer texto completo ↗DOI · 10.3390/ma19061191

Autor Doctor&Cols

Esteban Pérez Pevida
Cirugía Oral e Implantología

Cómo citar

Varas-Orozco S, Pérez-Pevida E, Martínez-López J, Mendes JM, Gil-Mur J, Brizuela-Velasco A. High-Temperature Hydrofluoric Acid Etching Increases the Debonding Resistance of Zirconia Copings Cemented to Titanium Bases: An In Vitro Study. Materials. 2026. doi:10.3390/ma19061191