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

Mansoura University10 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

DOUBLE

Enrollment

Conditions

Partial Edentulism Partial Edentulism Class 1

Interventions

Eligibility

Sex: ALLMin age: 40 YearsMax age: 50 Years

Medical Language ↔ Plain English

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.

Outcomes

Primary Outcomes

Surface topography changes of BioHPP clasp fitting surfaces

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

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