Comparing fit of polished and non-polished all-metal crowns
Official title: Comparison of Marginal Fit and Internal Adaptation in All-Metal Crowns: an in Vitro Experimental Trial
Run by Altamash Institute of Dental Medicine · NCT06067945 · Data updated 2026-11-12
This study tests if non-polished all-metal crowns fit as well as polished ones on maxillary molars to see if they can be a good alternative in dental treatments.
Quick facts
| Study type | Observational |
|---|---|
| Sex | All |
| Enrollment | 28 (estimated) |
| Sponsor | Altamash Institute of Dental Medicine Academic / other |
| Locations | 1 site (Karachi, Sindh) |
| Status | Recruiting |
| Started | February 24, 2025 |
| Main results expected | June 20, 2025 |
| Study ends | June 20, 2025 |
| Registry record updated | February 26, 2025 |
| Trial ID | NCT06067945 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are phantom teeth specifically maxillary molars prepared for all-metal crowns.
✕Probably not a fit
Patients with over-prepared or underprepared crowns, defective crowns, or issues with silicone films will not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study evaluates the marginal fit and internal adaptation of all-metal crowns using both polished and non-polished crown preparations. It aims to determine whether non-polished preparations can achieve comparable results to polished ones in terms of fit and adaptation. The study utilizes phantom teeth and focuses on maxillary molars, employing a conventional lost-wax technique for crown fabrication. The findings could provide insights into dental crown preparation techniques and their impact on clinical outcomes.
Why it matters
Potential benefit: If successful, this study could improve dental crown preparation methods, leading to better fitting crowns and enhanced patient outcomes.
How similar studies have gone: While this study focuses on a specific comparison, similar studies in dental materials have shown varying degrees of success, indicating that the approach has been explored but may still yield novel insights.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Phantom teeth 2. Maxillary molars 3. Metal crowns with conventional lost-wax technique for crown fabrication Exclusion Criteria: 1. Over prepared or underprepared crowns 2. Defective metal crowns 3. Ruptured silicone films upon removal 4. Defective die stone casts
Where it's running
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Altamash Institute Of Dental Medicine
Karachi, Sindh, Pakistan Recruiting
Study contacts
- Study coordinator: Tooba Shabbir, FCPS
- Email: tooba.shabbir92@gmai.com
- Phone: 03442105654
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.