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

NCT07642128 | Completed

• 1 other identifier: magnetic attachments
• Study Type: interventional
• Target: 14
• Locations: 1 country
• Sites: 1

Brief Summary

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

Conditions

Complete Edentulism; Randomized Clinical Trial

Keywords

Randomized Clinical Trial; Retention Force; Implant Overdenture; Mandibular Overdenture; Dental Implants; Overdenture Retention; Magnetic Attachment; Mandibular Implant-Supported Overdenture

Outcome Measures

Primary Outcomes (1)

• Overdenture Retention Force

  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

Study Arms (2)

Flat Magnetic Attachment Group

EXPERIMENTAL

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

Dome Magnetic Attachment Group

EXPERIMENTAL

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

Interventions

Flat Magnetic Attachment DEVICE

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.

Also known as: Dentium MGT5520 Dentium MKP5530

Flat Magnetic Attachment Group

Dome Magnetic Attachment DEVICE

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.

Also known as: Dentium MGT5520D Dentium MKP5530D

Dome Magnetic Attachment Group

Eligibility Criteria

• Age: 50 Years - 70 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• 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.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Ain Shams University: lead

Study Sites (1)

Faculty of Dentistry, Ain Shams University

Cairo, Egypt

Location

Related Publications (1)

• Song SY, Kang KH, Lee JY, Shin SW. Effects of type of magnet attachment and implant angulation in two implant overdenture models. J Adv Prosthodont. 2020 Feb;12(1):33-37. doi: 10.4047/jap.2020.12.1.33. Epub 2020 Feb 20.

  PMID: 32128084 BACKGROUND

Study Officials

• sawsan maged, Assoc. Prof.

  Faculty of Dentistry, Ain Shams University

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Masking Details: This is an open-label study. Participants and investigators are aware of the magnetic attachment design used. Outcome assessment is based on objective retention measurements obtained using a digital force gauge.
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: dentist

Model Details: Participants will be randomly assigned to one of two parallel groups according to the magnetic attachment design used for mandibular implant-supported overdentures. Group I will receive flat magnetic attachments, while Group II will receive dome-shaped magnetic attachments. Retention will be evaluated at baseline, 3 months, and 6 months after overdenture loading.

Study Record Dates

• First Submitted: June 7, 2026
• First Posted: June 11, 2026
• Study Start: January 1, 2024
• Primary Completion: April 1, 2025
• Study Completion: December 1, 2025
• Last Updated: June 11, 2026

Record last verified: 2026-06

Data Sharing

• IPD Sharing: Will not share

Locations

EG (1)