Retention of Dome and Flat Magnetic Attachments in Mandibular Implant Overdentures Randomized Controlled Clinical Trial

June 7, 2026 updated by: Marwan Elnady, Ain Shams University

Effect of Two Forms of Magnetic Attachments on Retention of Implant Retained Mandibular Over-Dentures Randomized Controlled Clinical Trial

Aim of the Study The aim of this study is to compare between two forms of magnetic attachments in implant retained mandibular over-dentures.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Complete edentulism of the mandible is frequently associated with compromised denture retention and stability, which may negatively affect mastication, comfort, and patient satisfaction. Mandibular implant-supported overdentures retained by magnetic attachments have been introduced as a reliable treatment option to improve prosthesis retention and function.

Different magnetic attachment designs are available, including flat and dome-shaped configurations. The geometry of magnetic attachments may influence retentive behavior, stress distribution, and overdenture stability during function. However, clinical evidence comparing the retention performance of these attachment designs remains limited.

This randomized clinical trial will include 14 completely edentulous patients aged 50-65 years. All participants will receive two implants placed in the canine regions of the mandible using a fully guided surgical protocol. After a 3-month healing period, patients will be randomly allocated into two equal groups according to the magnetic attachment design used. Group I will receive flat magnetic attachments, while Group II will receive dome-shaped magnetic attachments.

The primary outcome measure will be overdenture retention evaluated using a digital force gauge. Retention measurements will be performed at the time of overdenture loading (baseline), after 3 months of functional use, and after 6 months of functional use. The results will be used to determine whether magnetic attachment design influences the retention of mandibular implant-supported overdentures.

Study Type

Interventional

Enrollment (Actual)

14

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
      • Cairo, Egypt
        • Faculty of Dentistry, Ain Shams University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Completely edentulous mandible for at least 6 months.
  • Age between 50 and 65 years.
  • Adequate interforaminal bone volume for placement of two implants in the mandibular canine regions.
  • Angle Class I maxillomandibular relationship.
  • Medically fit patients capable of undergoing implant surgery.
  • Ability and willingness to comply with study visits and follow-up procedures.
  • Signed informed consent.

Exclusion Criteria:

  • Uncontrolled systemic diseases that may contraindicate implant surgery or affect osseointegration.
  • Uncontrolled diabetes mellitus.
  • Osteoporosis or metabolic bone disorders affecting implant healing.
  • Previous head and neck radiotherapy.
  • Presence of oral lesions or untreated oral pathology.
  • Temporomandibular joint disorders.
  • Parafunctional habits such as bruxism.
  • Inability to comply with study protocol or follow-up schedule.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Flat Magnetic Attachment Group
Participants received mandibular implant-supported overdentures retained by flat magnetic attachments. Two Dentium SuperLine implants were placed in the canine regions of the mandible, and flat magnetic attachments (MKP5530 keeper with MGT5520 magnetic assembly) were used for overdenture retention.
Device: Flat Magnetic Attachment
Flat magnetic attachment system used for retention of mandibular implant-supported overdentures. The system consisted of a Dentium MKP5530 keeper and MGT5520 magnetic assembly with a manufacturer-reported retentive force of 700 gf.
Other Names:
  • Dentium MGT5520 Dentium MKP5530
Experimental: Dome Magnetic Attachment Group
Participants received mandibular implant-supported overdentures retained by dome-shaped magnetic attachments. Two Dentium SuperLine implants were placed in the canine regions of the mandible, and dome magnetic attachments (MKP5530D keeper with MGT5520D magnetic assembly) were used for overdenture retention.
Device: Dome Magnetic Attachment
Dome-shaped magnetic attachment system used for retention of mandibular implant-supported overdentures. The system consisted of a Dentium MKP5530D keeper and MGT5520D magnetic assembly with a manufacturer-reported retentive force of 700 gf.
Other Names:
  • Dentium MGT5520D Dentium MKP5530D

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Overdenture Retention Force
Time Frame: Baseline, 3 months, and 6 months after overdenture loading
Retention force of mandibular implant-supported overdentures retained by flat and dome-shaped magnetic attachments, measured in Newtons (N) using a digital force gauge during vertical dislodgement.
Baseline, 3 months, and 6 months after overdenture loading

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ain Shams University

Investigators

  • Study Director: sawsan maged, Assoc. Prof., Faculty of Dentistry, Ain Shams University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2024

Primary Completion (Actual)

April 1, 2025

Study Completion (Actual)

December 1, 2025

Study Registration Dates

First Submitted

June 7, 2026

First Submitted That Met QC Criteria

June 7, 2026

First Posted (Actual)

June 11, 2026

Study Record Updates

Last Update Posted (Actual)

June 11, 2026

Last Update Submitted That Met QC Criteria

June 7, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • magnetic attachments

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Complete Edentulism

Clinical Trials on Flat Magnetic Attachment

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in China

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe