Wear resistance of CAD-CAM-milled PEEK, PEKK, and cobalt-chromium removable partial denture frameworks for implant-assisted removable partial dentures against zirconia crowns during simulated insertion/removal cycling in a mandibular Kennedy Class I model.

Iman Adel El-Asfahani, Mohamed Hesham Anwer, Abdullah Kamel

Abstract read

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Article in The journal of advanced prosthodontics, 2026. 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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5 · Who and what money

Authors and funding

3 authors.

Iman Adel El-AsfahaniProsthodontics Department, Faculty of Dentistry, Minia University, Minia, Egypt.ORCID https://orcid.org/0000-0003-0952-9544

Mohamed Hesham AnwerProsthodontics Department, Faculty of Dentistry, Assiut University, Assiut, Egypt.ORCID https://orcid.org/0009-0003-0616-5762

Abdullah KamelProsthodontics Department, Faculty of Dentistry, Minia University, Minia, Egypt.ORCID https://orcid.org/0000-0001-5456-9233

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo compare the wear resistance of CAD-CAM-milled PEEK, PEKK, and cobalt-chromium (Co-Cr) removable partial denture (RPD) frameworks against zirconia crowns during simulated insertion/removal cycling in a mandibular Kennedy Class I model. MATERIALS AND

methodsA Kennedy Class I acrylic model with two implant analogues supporting zirconia crowns was used. RPD frameworks (n = 6/group) were milled from PEEK (BioHPP), PEKK (Pekkton ivory), and Co-Cr (Scheftner Dental Alloys). Specimens underwent 2160 insertion/removal cycles (24 month simulation) under 50 N load in a chewing simulator with thermocycling (5 - 55℃) and artificial saliva. Wear at the proximal plate, occlusal rest, and retentive arm was assessed via optical profilometry for volume change (µm

resultsCo-Cr generally exhibited higher surface roughness than PEEK and PEKK (

conclusionWithin the limitations of this

Indexed as

Cobalt-chromium (Co-Cr)Computer-aided designDental wearPolyetheretherketoneRemovable partial denture

Identifiers

PMID42688727

DOI10.4047/jap.2026.18.4.313

PMCPMC13535385

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.