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Completed

NCT Number: NCT07701200

OT-Bridge System Versus Multiunit Abutment for Mandibular All On-4 Screw Retained Prostheses.

This study aims to compare two different prosthetic systems used in mandibular full-arch implant-supported fixed prostheses (All-on-4). The study evaluates patient satisfaction and prosthetic complications associated with the OT-Bridge system versus multiunit abutments.

A total of 20 patients will be included and divided into two equal groups. All patients will receive implant-supported screw-retained fixed prostheses.

Clinical and prosthetic outcomes will be assessed at baseline (T0), 6 months (T6), and 12 months (T12), including evaluation of patient satisfaction and any prosthetic complications.

The findings of this study may help improve the selection of prosthetic systems to enhance clinical outcomes and patient quality of life.

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Key information

Conditions

Complete Edentulism All-on-4 Implant Supported Prosthesis Multiunnit Abutments OT- Bridge

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Ministry of Health and Population, Egypt - Kafr Demira Health Unit

Al Mansurah, 00000, Egypt

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Adult patients (≥18 years) with edentulous mandible.
  • Patients receiving or having received All-on-4 dental implants in the mandible.
  • Adequate implant stability to support prosthetic loading.
  • Patients indicated for screw-retained full-arch fixed prostheses using either OT-Bridge system or multiunit abutments.
  • Patients willing to participate and attend follow-up visits at T0, T6, and T12 months.

Exclusion criteria

  • Patients with uncontrolled systemic conditions affecting healing (e.g., uncontrolled diabetes).
  • Patients with failed or mobile implants.
  • Severe parafunctional habits (e.g., uncontrolled bruxism).
  • Poor oral hygiene compliance.
  • Patients unable to attend follow-up visits

Treatment and study plan

OT-Bridge

Device

OT-Bridge system is a prosthetic attachment system used for implant-supported fixed full-arch prostheses. It is designed to connect implants and provide a screw-retained restoration for mandibular All-on-4 cases, allowing improved prosthetic stability and passive fit.

Multiunit

Device

Multiunit abutments are prosthetic components used in implant-supported full-arch fixed prostheses. They are placed on dental implants to correct angulation and provide a stable platform for screw-retained mandibular All-on-4 restorations.

Primary outcomes

  1. Patient Satisfaction

    Time frame: Baseline, 6 months, 12 months

    Patient satisfaction will be assessed using a structured questionnaire for patients receiving mandibular All-on-4 implant-supported fixed prostheses. Satisfaction will be evaluated at baseline (T0), 6 months (T6), and 12 months (T12) after prosthesis delivery, comparing OT-Bridge system and multiunit abutments.

  2. Prosthetic Complications

    Time frame: Baseline, 6 months, 12 months

    Prosthetic complications will be recorded for both groups, including screw loosening, prosthesis fracture, loss of retention, and need for maintenance or adjustment. Evaluations will be performed at T0, T6, and T12 months in mandibular All-on-4 implant-supported prostheses.

Sponsors and collaborators

Lead sponsor

Mansoura University

Other

Registry information

Official study title

Patient Satisfaction and Prosthetic Complication of OT-Bridge System Versus Multiunit Abutment for Mandibular All On-4 Screw Retained Prostheses.

Important dates

Study start
2023
Primary completion
2025
Study completion
2025
First posted
Jul 14, 2026
Registry last updated
Jul 14, 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.

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