Influence of Acetal Resin Versus Nylon Elastic Cap on Crestal Bone Loss in Mandibular Implant-Supported Overdenture (AcetalResin)

June 21, 2026 updated by: Seif eldin Diaa Ezzat, Future University in Egypt
Objective: To evaluate and compare the effect of two different attachment housing materials-Acetal Resin (Polyoxymethylene) versus conventional Nylon elastic caps-on marginal crestal bone loss around dental implants supporting a mandibular overdenture. It also evaluates peri-implant clinical tissue health by measuring pocket depth and the gingival bleeding index.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Study Design & Timeline: A prospective, double-blind, randomized controlled clinical trial with a 1:1 allocation ratio. Clinical and radiographic outcomes will be evaluated at overdenture insertion (baseline), and at 6 and 12 months post-insertion.ethodology & Analysis: Pre-operative bone volume will be assessed via Cone Beam CT (CBCT). Crestal bone loss will be measured using the long cone parallel radiographic technique , while pocket depth and gingival bleeding will be measured using a William's graduated probing device. Data will undergo normality testing to determine the use of parametric (Independent t-test, Repeated Measures ANOVA) or non-parametric (Mann-Whitney, Friedman) statistical analyse

Study Type

Interventional

Enrollment (Estimated)

22

Phase

  • Not Applicable

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

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Completely edentulous mandible.
  • Sufficient bone height/width in mandibular residual ridges.
  • Angles classification class I.
  • Sufficient inter-arch distance

Exclusion Criteria:

  • TMJ disorders.
  • Diabetic
  • Hypertensive
  • Cancer patients.
  • Smoker
  • Osteoporosis.
  • Immunosuppressive disease
  • Any disease affecting bone/implant stability.

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: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: intervention
acetal
Device: Acetal Resin
overdenture supported by implants
Active Comparator: control
Nylon Elastic
Device: nylon
overdenture supported by implants

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in crestal bone levels
Time Frame: one year
mm
one year

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
pocket depth changes
Time Frame: one year
mm
one year

Collaborators and Investigators

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

Sponsor

Future University in Egypt

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 (Estimated)

July 1, 2026

Primary Completion (Estimated)

June 1, 2027

Study Completion (Estimated)

August 1, 2027

Study Registration Dates

First Submitted

June 7, 2026

First Submitted That Met QC Criteria

June 21, 2026

First Posted (Actual)

June 24, 2026

Study Record Updates

Last Update Posted (Actual)

June 24, 2026

Last Update Submitted That Met QC Criteria

June 21, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • FUE

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

1. Chronological Timeline and FrameworkTrial Duration: The active comparative clinical trial is designed to span a duration of one year. Measurement Intervals: Data collection and patient evaluation are scheduled at three distinct time points: at overdenture insertion (baseline), at 6 months, and at 12 months post-insertion

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.

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