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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&lt;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&lt;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.

Influence of SiO<sub>2</sub> content of polyetheretherketone (PEEK) on flexural properties and tensile bond strength to resin cement