Clinical Evaluation of Dentin Replacement Materials in Posterior Composite Restorations

August 8, 2026 updated by: Mohammed Abd El Ghany Mohammed, Tanta University
This randomized controlled clinical trial is designed to clinically evaluate and compare the performance of five dentin replacement materials used beneath posterior composite restorations.

Study Overview

Status

Enrolling by invitation

Conditions

Intervention / Treatment

Detailed Description

Thirty patients ranging in age from 20 to 35 years will be enrolled into the study. This study will be designed as a randomized controlled clinical trial including patients requiring six Class I restorations. Participants will be randomly allocated into six groups according to the type of dentin replacement material used: Group I (Biodentin), Group II (Activa Bioactive), Group III (Glass ionomer cement), Group IV (Ever x posterior), and Group V (Flowable resin). Restorations will be placed following standardized cavity preparation and manufacturer instructions. Clinical evaluation will be performed at baseline and 6, 12, and 18 months using modified FDI criteria, assessing retention, marginal integrity, surface roughness, anatomical form, postoperative sensitivity, and secondary caries. Data will be collected and statistically analyzed

Study Type

Interventional

Enrollment (Estimated)

30

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
    • Tanta
      • Tanta, Tanta, Egypt, 31527
        • faculty of dentistry, Tanta 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

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Patients who are medically able to undergo routine dental restorative treatment.
  • Patients willing and able to provide written informed consent.
  • Patients with adequate oral hygiene and periodontal health for participation in the study.
  • Patients requiring posterior Class I restorations

Exclusion Criteria:

  • Patients with systemic conditions that contraindicate routine dental treatment.
  • Patients unable or unwilling to provide informed consent.
  • Patients with poor compliance or inability to attend scheduled follow-up visits.
  • Teeth with clinical or radiographic evidence of irreversible pulpitis, pulp necrosis, or periapical pathology.

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: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Biodentine
Participants will receive posterior Class I composite restorations incorporating Biodentine as the dentin replacement material according to the standardized clinical protocol and manufacturer's instructions.
Other: Biodentine
Biodentine will be used as a dentin replacement material in standardized posterior Class I cavities before placement of the definitive composite restoration. The material will be applied according to the manufacturer's instructions
Experimental: ACTIVA BioACTIVE
Participants will receive posterior Class I composite restorations incorporating ACTIVA BioACTIVE as the dentin replacement material according to the standardized clinical protocol and manufacturer's instructions.
Other: ACTIVA BioACTIVE
ACTIVA BioACTIVE will be used as a dentin replacement material in standardized posterior Class I cavities before placement of the definitive composite restoration. The material will be applied according to the manufacturer's instructions.
Experimental: Glass Ionomer Cement
Participants will receive posterior Class I composite restorations incorporating conventional glass ionomer cement as the dentin replacement material according to the standardized clinical protocol and manufacturer's instructions.
Other: glass ionomer cement
Glass ionomer cement will be used as a dentin replacement material in standardized posterior Class I cavities before placement of the definitive composite restoration. The material will be applied according to the manufacturer's instructions.
Experimental: everX Posterior
Participants will receive posterior Class I composite restorations incorporating everX Posterior as the dentin replacement material according to the standardized clinical protocol and manufacturer's instructions.
Other: everX Posterior
everX Posterior will be used as a dentin replacement material in standardized posterior Class I cavities before placement of the definitive composite restoration. The material will be applied according to the manufacturer's instructions.
Experimental: Flowable Resin
Participants will receive posterior Class I composite restorations incorporating flowable resin composite as the dentin replacement material according to the standardized clinical protocol and manufacturer's instructions
Other: Flowable Resin Composite
Flowable resin composite will be used as a dentin replacement material in standardized posterior Class I cavities before placement of the definitive composite restoration. The material will be applied according to the manufacturer's instructions.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
marginal adaptation
Time Frame: 18 months
Clinical evaluation of marginal adaptation was conducted in accordance with the World Dental Federation (FDI) criteria by two calibrated examiners at baseline and after 6, 12, and 18 months. Each restoration was assessed and categorized according to the degree of conformity with the established criteria as follows: score 1, clinically excellent; scores 2 and 3, clinically satisfactory; and scores 4 and 5, clinically inadequate. Scores of 1-3 were considered indicative of clinical success, whereas scores of 4 or 5 were considered indicative of failure. Visual assessment was performed under adequate illumination using a high-intensity light source and a dental magnifying loupe to facilitate accurate evaluation. For statistical analysis, the Friedman test was used to assess within-group changes in restoration outcomes across the different follow-up periods. The Kruskal-Wallis test was applied to compare restoration outcomes among the different groups at each corresponding follow-up.
18 months

Collaborators and Investigators

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

Sponsor

Tanta 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)

August 12, 2025

Primary Completion (Estimated)

March 27, 2027

Study Completion (Estimated)

March 29, 2027

Study Registration Dates

First Submitted

August 8, 2026

First Submitted That Met QC Criteria

August 8, 2026

First Posted (Actual)

August 13, 2026

Study Record Updates

Last Update Posted (Actual)

August 13, 2026

Last Update Submitted That Met QC Criteria

August 8, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Composite Restorations

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.

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