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PEEK vs Metal Bar Attachments

NCT07323628 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2026-01-09

No results posted yet for this study

Summary

This study is being conducted to compare two types of bar attachments used to support lower dentures in patients who have lost all their lower teeth. Many people who wear a single lower denture experience problems with stability, chewing, and comfort. Placing two implants in the lower jaw and attaching the denture to a bar can greatly improve how well the denture stays in place.

Traditionally, these bars have been made from metal. While effective, metal bars can place higher stress on the bone around the implants, which may lead to more bone loss over time. A newer material, PEEK (polyetheretherketone), is lighter and has flexibility closer to natural bone. This may reduce stress on the implants and help protect the surrounding bone.

In this randomized clinical trial, patients are assigned to receive either a PEEK bar or a metal bar to retain their lower denture. All participants receive two implants placed in the canine region of the lower jaw, followed by a bar-retained overdenture after healing.

The study follows patients for 12 months and measures:

Marginal bone loss: how much bone is lost around each implant, assessed through radiographs.

Patient satisfaction: how comfortable and functional the denture feels, including stability, chewing, speech, hygiene, and overall handling.

Early results show that both types of bars support the denture well, but implants connected to PEEK bars tend to show less bone loss after several months compared to those connected to metal bars. Patient satisfaction is high in both groups, with slightly higher scores reported by patients using PEEK bars, although not significantly different.

This study may help dentists choose the best bar material to improve long-term implant health and denture comfort.

Conditions

  • Edentulism in Lower Jaw

Interventions

DEVICE

PEEK Bar Attachment

A CAD/CAM-fabricated polyetheretherketone (PEEK) bar used to retain a mandibular implant-supported overdenture on two implants placed in the canine regions of the mandible.

DEVICE

Metal Bar Attachment

A conventional metal alloy bar used to retain a mandibular implant-supported overdenture on two implants placed in the canine regions of the mandible.

Sponsors & Collaborators

  • Sherif Aly Sadek

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
40 Years
Max Age
70 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2024-05-05
Primary Completion
2025-10-10
Completion
2025-11-10

Countries

  • Egypt

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07323628 on ClinicalTrials.gov