Influence of SiO₂ content of polyetheretherketone (PEEK) on flexural properties and tensile bond strength to resin cement

摘要

In the present study, the influence of the SiO_(2) content of polyetheretherketone (PEEK) on the bonding between PEEK and resin cement, and the corresponding mechanical properties, were evaluated. Three experimental PEEK samples with varying amounts of SiO_(2), and PEEK containing 20 wt% of TiO_(2) (DK), were investigated. The tensile bond strength (TBS) was evaluated before and after 10,000 thermal cycles, upon polishing, sandblasting, and conditioning of the specimens with BONDMER lightless containing a silane coupling agent, and bonded with ESTECEM II. The crystallinity, flexural modulus, and flexural strength were determined after 10,000 thermal cycles. TBS values were analyzed by two-way ANOVA and a t -test with Bonferroni correction (α <0.05), while the crystallinity, flexural modulus, and flexural strength were analyzed with one-way ANOVA followed by a t -test with Bonferroni correction (α <0.05). The TBS improved with increasing SiO_(2) content in PEEK; moreover, DK and the sample with 40 wt% SiO_(2) exhibited the highest flexural strength.