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Comparative Evaluation of Gingival Health and Bacterial Adhesion in Bioflx vs. Zirconia Crowns on Primary Molars

NCT06933927 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 28

Last updated 2025-04-22

No results posted yet for this study

Summary

The goal of this clinical trial is to evaluate the Evaluation of Gingival Health and Bacterial Adhesion of Bioflx Crowns Compared to Zirconia Crowns on Primary Molars of Bioflx crowns compared to zirconia crowns in the restoration of primary molars. The main question\[s\] it aims to answer is there are the differences in bacterial adhesion and gingival health between bioflx and zirconia crowns The study will also assess the clinical performance of both types of crowns in terms of bacterial adhesion , child and parents satisfaction,as well as preparation time.

Conditions

  • Carious Primary Molars

Interventions

OTHER

(Group A: Bioflx crowns)

Minimal preparation will be required due to their flexural adaptability:1. Choose an appropriately sized Bioflex (Nusmile) crown of similar size to the mesiodistal width.2. The tooth will be prepared using a flame stone for occlusal reduction by 1-1.5 mm, including the central groove .3Proximal preparation will be around 0.5 mm, by using a fine, long, tapered diamond stone to cut interproximal slices mesially and distally.4. The crown will be placed with a snug fit and cemented using glass ionomer

OTHER

(Group B) : Preformed Zirconia crown

1\. Size Determination can be achieved by holding a crown up to the existing tooth or, if available, using digital x-ray measurements to match the patient's interproximal width to the corresponding crown size.2. OcclusalPerform an occlusal reduction of about 1.5-2 mm, ensuring adequate space for the crown material. 3. Axial ReductionReduce the buccal and lingual surfaces uniformly, ensuring the removal of any prominent buccal bulges to allow for a passive crown fit. 4. Interproximal ReductionClearance: Ensure sufficient interproximal space by removing enough tooth structure to allow the crown to seat without interference.5. Subgingival PreparationMargin Placement: Extend the preparation subgingivally by approximately 2 mm to achieve optimal crown retention and aesthetics. This involves removing the chamfer margin at the tissue level and ensuring a smooth transition from the root to the coronal tooth structure

Sponsors & Collaborators

  • Cairo University

    lead OTHER

Principal Investigators

  • Manal Ahmed Elsheikh, PHD · Cairo University

  • Shaimaa Mohamed Sabry mostafa, PHD · Cairo University

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
4 Years
Max Age
8 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-06-01
Primary Completion
2025-12-30
Completion
2026-02-26

Countries

  • Egypt

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06933927 on ClinicalTrials.gov