Surface Wear of PEEK Clasp Against Zirconia Full-Coverage Restored Abutments in Distal Extension Removable Partial Dentures

This prospective clinical comparative study will evaluate the surface wear of BioHPP (modified polyetheretherketone) clasps opposing either natural tooth abutments or zirconia full-coverage abutments in mandibular bilateral distal extension removable partial dentures. Ten participants will be randomly assigned to two equal groups. Surface topography changes of the clasp fitting surfaces will be assessed using scanning electron microscopy (SEM) at denture insertion, 6 months, and 12 months. The findings will help determine the influence of abutment material on the wear behavior of BioHPP clasps and provide evidence for selecting appropriate abutment materials in removable partial denture treatment.

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Key information

Conditions

Partial Edentulism Partial Edentulism Class 1

Age range

40 year–50 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Faculty of dentistry Mansoura university

Al Mansurah, Egypt

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Adults aged 40-50 years. Mandibular Kennedy Class I partial edentulism. Bilateral distal extension edentulous areas. Presence of healthy canines and first premolars suitable as abutment teeth. Adequate oral hygiene and healthy periodontal condition. Adequate interarch space for removable partial denture fabrication. Ability and willingness to attend all scheduled follow-up visits and provide written informed consent.

Exclusion criteria

Systemic diseases or medications that could affect bone or soft tissue healing. Active periodontal disease or poor oral hygiene. Severe parafunctional habits (e.g., bruxism or clenching). Smoking. Pregnancy or lactation. Allergy or hypersensitivity to any study materials. Inability to comply with study procedures or follow-up visits.

Treatment and study plan

PEEK Removable Partial Denture Framework with Natural Tooth Abutments

Device

BioHPP Removable Partial Denture Framework with Natural Tooth Abutments

PEEK Removable Partial Denture Framework with Zirconia Abutments

Device

BioHPP Removable Partial Denture Framework with Zirconia Abutments

Primary outcomes

Surface topography changes of BioHPP clasp fitting surfaces

Time frame: Baseline (denture insertion), 6 months, and 12 months

Surface wear of BioHPP clasp fitting surfaces assessed by scanning electron microscopy (SEM) and digital morphometric analysis

Sponsors and collaborators

Lead sponsor

Mansoura University

Other

Registry information

Official study title

Clinical Evaluation of Surface Wear of PEEK Clasps Against Zirconia Full-Coverage Restored Abutments in Distal Extension Removable Partial Dentures

Acronym: PEEKWear

Important dates

Study start: 2024
Primary completion: 2024
Study completion: 2025
First posted: Jul 16, 2026
Registry last updated: Jul 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed