Radiographic and Retention Evaluation Over Seven Years for Four Implant Retained Overdenture

Mansoura University27 enrolled

Overview

ABSTRACT Statement of the problem: Insufficient long-term retrospective data is evaluating marginal bone loss and retention of four-implant Locator-retained mandibular overdentures. Purpose: To assess marginal bone loss and retention of four-implant Locator-retained mandibular overdentures over seven years at the time of overdenture insertion (T0), 1 year (T1), and 7 years (T7) after insertion. Material and methods: This retrospective study included 27 completely edentulous patients with maxillary single denture, and four parallel implants were placed interforaminal, and they already have a mandibular four-implant retained overdenture with LOCATOR attachments.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Marginal Bone Loss Around Implants

Interventions

Eligibility

Sex: ALL

Medical Language ↔ Plain English

Inclusion Criteria 1. Completely edentulous patients 2. Presence of four mandibular implants supporting a Locator-retained overdenture with an opposing single maxillary denture. 3. Availability of baseline and follow-up radiographs 4. Minimum follow-up period of 7 years after prosthesis delivery Exclusion Criteria 1\. Incomplete clinical or radiographic records 2. History of implant failure before prosthetic loading 3. Patients with peri-implantitis at baseline 4. Systemic conditions known to affect bone metabolism

Outcomes

Primary Outcomes

Marginal Bone Loss

Time frame: From the time of implant loading (Baseline) up to 7 years.

Secondary Outcomes

Prosthetic Retention

Time frame: 7 years.