ArticleThe journal of advanced prosthodontics2025
Fracture strength and failure mode of implant-supported provisional resin composite crowns on hydroxyapatite-coated sulfonated PEEK abutments following thermomechanical loading.
Article in The journal of advanced prosthodontics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study evaluates the fracture strength and failure mode of implant-supported provisional resin composite crowns fabricated over hydroxyapatite-coated sulfonated polyetheretherketone (PEEK) and sandblasted PEEK abutments after thermomechanical loading. MATERIALS AND
methodsThirty customized PEEK provisional abutments were surface-treated by (1) sandblasting with 50 µm aluminum oxide (n = 15) (Sa) and (2) HA coating after sulfonation (n = 15) (HA). These abutments were veneered to create crowns for the mandibular right first permanent molar using bulk-fill resin composites after applying a thin layer of universal adhesive. All specimens were stored in distilled water at 37℃ for 24 hours, underwent thermocycling for 1000 cycles at 5℃ and 55℃ (30 s dwell time and 10 s transfer time), and were subjected to mechanical cyclic loading for 120,000 cycles with 50 N using a chewing simulator at room temperature. Fracture strength was evaluated with a universal testing machine, and failure mode was analyzed using a 3D surface profilometer. The Mann-Whitney U test was used for statistical analysis (α = 0.05).
resultsThe HA group exhibited significantly higher fracture strength (1469.71 N ± 200.36 N) than the Sa group (1152.36 N ± 180.89 N). Most failures were adhesive and included irreparable fractures of the crown.
conclusionHA coating after sulfonation effectively enhances the fatigue strength of PEEK abutments veneered with resin composites for implant-supported provisional crowns.
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