Evaluating the fit of high-performance polymer endocrowns on treated molars

Assessment of Marginal and Internal Fit of High Performance Polymer Endocrown Using Two Preparation Designs (Randomized Clinical Trial)

Not applicable Interventional Cairo University · NCT06500845

This study is testing how well new high-performance polymer crowns fit on treated molars to see if they can improve dental restoration for patients.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment24 (estimated)
Ages18 Years to 50 Years
SexAll
SponsorCairo University Academic / other
Locations1 site (Cairo)
Trial IDNCT06500845 on ClinicalTrials.gov

What this trial studies

This study recruits participants with endodontically treated molars to assess the fit of high-performance polymer endocrowns using two different preparation designs: bevel and butt marginal designs. Participants undergo a thorough examination and tooth preparation, followed by the fabrication and trial of the endocrown. The fit of the endocrown is evaluated using a replica technique to ensure optimal marginal and internal fit before final cementation. The study aims to improve restoration outcomes for patients with treated molars.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 to 50 with endodontically treated molars that have sufficient remaining tooth structure and good oral hygiene.

Not a fit: Patients with active periodontal disease, severe tooth structure loss, or poor oral hygiene may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance the quality and longevity of dental restorations for patients with endodontically treated molars.

How similar studies have performed: Previous studies have shown promising results in the use of high-performance polymers for dental restorations, indicating potential success for this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Patient age range from 18 years -50 years old. They should be able to read and write so they can sign the informed consent.
2. Patient should have a good physical and psychologically state to be able to withstand the steps of the restoration procedure.
3. Have a molar with root canal filling with no active periodontal or apical involvement.
4. Patients having root canal treatment teeth indicated for endocrown treatment with 3 or 4 axial walls remaining.
5. Patient with axial wall length not less than 3 mm and not more than 5 mm.
6. Patient should have good oral hygiene and motivation.

Exclusion Criteria:

1. Patient with periodontal or apical involvement or improper root canal treatment.
2. Severe loss of the tooth structure in which the amount of the remaining tooth structure is less than 2mm.
3. Patient with poor oral hygiene or with occlusal instability
4. Patient with improper physical or psychological state.
5. Patient not pregnant or lactating.

Where this trial is running

Cairo

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Endodontically Treated MolarMarginal FitInternal FitEndocrown
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.