Evaluation of Marginal and Internal Fit of Metal CrownsNCT06067945
Comparison of Marginal Fit and Internal Adaptation in All-Metal Crowns: an in Vitro Experimental Trial
An observational study of Evaluation of Marginal and Internal Fit of Metal Crowns, run by Altamash Institute of Dental Medicine at 1 site in Pakistan.
Trial summary
The goal of this in vitro study is to compare the marginal fit and internal adaptation of all-metal crowns in polished crown preparations and non-polished crown preparations The main question it aims to answer is: are the non polished tooth preparations comparable to polished preparations? We will compare polish and… Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Evaluation of Marginal and Internal Fit of Metal Crowns
- What is being tested?
- microleakage
- How many people
- 28 participants
- Where
- 1 sitePakistan
- Study dates
- 24 Feb 2025to 20 Jun 2025
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Study population: The phantom teeth (Nissin dental products Inc. Kyoto 601-8469,Japan) will be fixed in the model plaster block type II (Super national, Karachi Pakistan) with full crown and only 2mm of root portion
Who may be able to join
- Phantom teeth
- Maxillary molars
- Metal crowns with conventional lost-wax technique for crown fabrication
Who cannot join
- Over prepared or underprepared crowns
- Defective metal crowns
- Ruptured silicone films upon removal
- Defective die stone casts
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Pakistan1 site, 1 recruiting
- Recruiting
Altamash Institute Of Dental Medicine
Karachi, Sindh, 5444
Tooba Shabbir, FCPS, 03442105654, tooba.shabbir92@gmail.com
About this study
The goal of this in vitro study is to compare the marginal fit and internal adaptation of all-metal crowns in polished crown preparations and non-polished crown preparations The main question it aims to answer is: are the non polished tooth preparations comparable to polished preparations? We will compare polish and non polish groups and see their effects on marginal fit and internal adaptation of all metal crown
- Being tested
- microleakage
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
microleakageOther
prevention of microleakage and secondary carries
| Study group | Role | What they receive |
|---|---|---|
| NP is given to the non polished group which is group 2 | Out of two groups, group 2 is a test group to which rough preparations are assigned Receives: Other: microleakage |
What is being measured
The primary outcome is the main question the study is designed to answer.
marginal fit
The margins of fixed restorations refers to the junction between the prepared tooth structure and the crown restoration
Measured: six months
Secondary outcomes (1)
Internal fit
Internal fit is defined as the perpendicular distance between the framework and abutment teeth and the misfit is measured from occlusal/incisal and axial surfaces to the coping
Measured: six months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Oct 2023
- Study start24 Feb 2025
- Primary completion20 Jun 2025 (estimated)
- Study completion20 Jun 2025 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Evaluation of Marginal and Internal Fit of Metal CrownsStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Prospective
- Enrolment
- 28 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Altamash Institute of Dental Medicine
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Tooba Shabbir, Altamash Institute of Dental Medicine
- Investigators
- Naseer Ahmad, Ph.D, Study director, Altamash Institute of Dental Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06067945
- Sponsor's protocol ID
- Tshabbir92 Altamash
- Status last verified
- Feb 2025
- First submitted
- 25 Sep 2023
- Last updated
- 26 Feb 2025
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 Feb 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Marginal Fit and Internal Adaptation in All-Metal Crowns: an in Vitro Experimental Trial
- ClinicalTrials.gov ID
- NCT06067945
- Acronym / sponsor ID
- Tshabbir92 Altamash
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 28 participants (estimated)
- Lead sponsor
- Altamash Institute of Dental MedicineUniversity, hospital or other
- Study start
- 24 Feb 2025 (actual)
- Primary completion
- 20 Jun 2025 (estimated)
- Study completion
- 20 Jun 2025 (estimated)
- First posted
- 5 Oct 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of this in vitro study is to compare the marginal fit and internal adaptation of all-metal crowns in polished crown preparations and non-polished crown preparations The main question it aims to answer is: are the non polished tooth preparations comparable to polished preparations? We will compare polish and non polish groups and see their effects on marginal fit and internal adaptation of all metal crown
Study design
- Observational model
- Other
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| NP is given to the non polished group which is group 2 | – | Other: microleakageOut of two groups, group 2 is a test group to which rough preparations are assigned |
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
- Study population
- The phantom teeth (Nissin dental products Inc. Kyoto 601-8469,Japan) will be fixed in the model plaster block type II (Super national, Karachi Pakistan) with full crown and only 2mm of root portion
Key inclusion criteria (3 listed)
- Phantom teeth
- Maxillary molars
- Metal crowns with conventional lost-wax technique for crown fabrication
Key exclusion criteria (4 listed)
- Over prepared or underprepared crowns
- Defective metal crowns
- Ruptured silicone films upon removal
- Defective die stone casts
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| microleakageprevention of microleakage and secondary carries | Other | NP is given to the non polished group which is group 2 |
Primary outcome
marginal fit
Time frame: six months
The margins of fixed restorations refers to the junction between the prepared tooth structure and the crown restoration
1 secondary outcome
Internal fit
Time frame: six months
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Feb 2025.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Naseer Ahmad, Ph.D study director
Altamash Institute of Dental Medicine
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Evaluation of Marginal and Internal Fit of Metal Crowns, run by Altamash Institute of Dental Medicine at 1 site in Pakistan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 26 Feb 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Pakistan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Tooba Shabbir, FCPS (03442105654, tooba.shabbir92@gmai.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
marginal fit (time frame: six months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Feb 2025; AzTrials last refreshed its copy on 7 Nov 2026.