PEER-REVIEWED PUBLICATION

2025

Diazonium chemistry for bonding between PEEK and resin cement

Atsu S, Saad A, et al.

The Journal of Prosthetic Dentistry

McGill University, University of Kırıkkale, Qatar University

RESEARCH SUMMARY

In vitro study evaluating diazonium-based surface priming to improve adhesion between PEEK and resin cement. PEEK samples received seven surface treatments (APA, D, A, APAA, DA, APAD, APADA; plus control). Surface chemistry (XPS), roughness (profilometry), wettability (contact angle), and tensile bond strength were measured. APADA (airborne-particle abrasion + diazonium + adhesive) achieved the highest tensile bond strength (~13.9 MPa), while controls exhibited negligible bonding (~0.1 MPa). Diazonium increased nitrogen content and wettability; adhesive containing MMA enhanced bond strength across groups.

Bonded PEEK specimens were tested using a CellScale UniVert mechanical tester. During bonding, a constant 50 N load was applied; after 24 h water storage, tensile pull-out was performed at 1 mm/min to failure. Bond strength (MPa) was calculated from UniVert load-displacement data and bonded area.

AUTHORS

Atsu S, Saad A, Tamimi F, Cerruti M.

PUBLICATION DETAILS

JOURNAL

The Journal of Prosthetic Dentistry

YEAR

2025

INSTITUTIONS

McGill University, University of Kırıkkale, Qatar University

COUNTRIES

Canada, Qatar, Turkey

INSTRUMENT USED

UniVert

TESTING METHODS

Tensile Testing

RESEARCH APPLICATIONS

Adhesives and Sealants TestingDental & Oral Tissue BiomechanicsMembranes and Thin Films MechanicsPolymers and Elastomers Testing

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