Zirconia CrownsNCT07139613
We Will Assess Zirconia Crown Restoring Endodontically Treated Posterior Teeth With Two Finish Line Designs and Two Occlusal Reduction Schemes
A study testing First intervention group(FF) flat occlusal scheme with feather edge finish line and Second intervention group(FS) flat occlusal with rounded shoulder finish line design in people with Zirconia Crowns, run by Armed Forces Institute of Dentistry, Pakistan at 2 sites in Pakistan.
Trial summary
Endodontically treated posterior teeth will be restored with zirconia crowns with two finish line designs(feather edge and rounded shoulder) and two occlusal reduction schemes(flat and planer).The crowns were designed with exocad software program .After cementation clinical performance in terms of marginal adaptation… Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Zirconia Crowns
- What is being tested?
- First intervention group(FF) flat occlusal scheme with feather edge finish line and Second intervention group(FS) flat occlusal with rounded shoulder finish line design
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 66 participants
- Where
- 2 sitesPakistan
- Study dates
- Aug 2025to Oct 2026
- Phase
- Interventional
- 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 18 to 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- patients from both genders.
- age range 18-65 years.
- patients with endodontically treated posterior teeth.
Who cannot join
- vital teeth
- anterior teeth.
- edentulous patient.
- patient with history of significant systemic diseases.
Trial locations and contacts
2 sites in 1 country. Contact the study team or a site near you to ask about taking part.
Pakistan2 sites
Armed Forces Institute of Dentistry
Rawalpindi, Punjab Province
Saira Bibi Registrar prosthodontics, 03339388357, drbibisaira@gmail.com
Saira Registrar Prosthodontics
Armed Forces Institute of Dentistry
Rawalpindi, Punjab Province
Saira Bibi Registrar prosthodontics, 03339388357, drbibisaira@gmail.com
About this study
Official title: Evaluation of Zirconia Crown Restoring Endodontically Treated Posterior Teeth With Two Finish Line Designs and Two Occlusal Reduction Schemes(a Randomized Clinical Trial)
Endodontically treated posterior teeth will be restored with zirconia crowns with two finish line designs(feather edge and rounded shoulder) and two occlusal reduction schemes(flat and planer).The crowns were designed with exocad software program .After cementation clinical performance in terms of marginal adaptation ,marginal discoloration, fracture and secondary caries was evaluated at 3 subsequent follow-up visits every 3months for 1 year.
Read the detailed description
Endodontically treated posterior teeth require full coverage coronal restoration, as they are more prone to fracture as compared to vital teeth .Over past two decades restorative dentistry there has been a paradigm shift in restorative dentistry towards monolithic zirconia crowns because of its superior esthetics ,excellent biocompatibility ,and continually improving biomechanical properties. For the long term clinical success of zirconia crowns tooth preparation designs particularly finish line designs and occlusal reduction play significant role. Different finish lines designs such as chamfer and shoulder, play a role in marginal fit of restoration .While assessing zirconia crowns of two finish line designs and two occlusal reduction schemes the participants were divided into three groups based on preparation design: the control group PS (planer occlusal and rounded shoulder) ; first interventional group (flat occlusal and feather); Second interventional group (flat occlusal and rounded shoulder) .To minimize bias the outcome assessor ,participants and statistician were blinded and only investigator will not blinded. After cementation on subsequent follow-up of one year with every three months interval United states Public Health Services Criteria (USPHS) is used for marginal adaptation ,discoloration, fracture and secondary caries, and gingival index score system is used for gingival response.
Second interventional group FS (Flat occlusal + rounded shoulder)
- Conditions
- Zirconia Crowns
- Being tested
- Control group(PS)Planer occlusal scheme with rounded shoulder finish line, First intervention group(FF) flat occlusal scheme with feather edge finish line, Second intervention group(FS) flat occlusal with rounded shoulder finish line design
- Keywords
- Zirconia crowns assessment with two finish line design and two occlusal reduction schemes
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Control group(PS)Planer occlusal scheme with rounded shoulder finish lineOther
Control group (PS) will have planer occlusal scheme with rounded shoulder finish line.
First intervention group(FF) flat occlusal scheme with feather edge finish lineProcedure or surgery
First intervention group we will have flat occlusal scheme with feather edge finish line
Second intervention group(FS) flat occlusal with rounded shoulder finish line designProcedure or surgery
Second intervention will have flat occlusal scheme with rounded shoulder finish line design
| Study group | Role | What they receive |
|---|---|---|
| Control group (PS) | Active comparator | Not described Receives: Other: Control group(PS)Planer occlusal scheme with rounded shoulder finish line |
| First intervention group (FF)flat occlusal scheme with feather-edge finish line | Experimental | In this intervention group flat occlusal scheme and feather edge finish line design is followed Receives: Procedure: First intervention group(FF) flat occlusal scheme with feather edge finish line |
| Second intervention group (FS)flat occlusal scheme with rounded shoulder finish line | Experimental | Not described Receives: Procedure: Second intervention group(FS) flat occlusal with rounded shoulder finish line design |
What is being measured
The primary outcome is the main question the study is designed to answer.
Gingival index score system and United States Public Health Services Criteria(USPHS)
Marginal adaptation ,marginal discoloration ,fracture and secondary caries evaluated using (USPHS) United States Public Health Services Criteria and gingival index score system is used to evaluate gingival response.
Measured: One year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Aug 2025
- Study startAug 2025 (estimated)
- Primary completionAug 2026 (estimated)
- Study completionOct 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Zirconia 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 66 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Armed Forces Institute of Dentistry, Pakistan
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Saira Bibi, Armed Forces Institute of Dentistry, Pakistan
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07139613
- Sponsor's protocol ID
- zirconia crowns
- Status last verified
- Aug 2025
- First submitted
- 18 Aug 2025
- Last updated
- 24 Aug 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Aug 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Zirconia Crown Restoring Endodontically Treated Posterior Teeth With Two Finish Line Designs and Two Occlusal Reduction Schemes(a Randomized Clinical Trial)
- ClinicalTrials.gov ID
- NCT07139613
- Acronym / sponsor ID
- zirconia crowns
- Conditions
- Zirconia Crowns
- Keywords
- Zirconia crowns assessment with two finish line design and two occlusal reduction schemes
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 66 participants (estimated)
- Lead sponsor
- Armed Forces Institute of Dentistry, PakistanUniversity, hospital or other
- Study start
- Aug 2025 (estimated)
- Primary completion
- Aug 2026 (estimated)
- Study completion
- Oct 2026 (estimated)
- First posted
- 24 Aug 2025 (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.
Endodontically treated posterior teeth will be restored with zirconia crowns with two finish line designs(feather edge and rounded shoulder) and two occlusal reduction schemes(flat and planer).The crowns were designed with exocad software program .After cementation clinical performance in terms of marginal adaptation ,marginal discoloration, fracture and secondary caries was evaluated at 3 subsequent follow-up visits every 3months for 1 year.
Detailed description
Endodontically treated posterior teeth require full coverage coronal restoration, as they are more prone to fracture as compared to vital teeth .Over past two decades restorative dentistry there has been a paradigm shift in restorative dentistry towards monolithic zirconia crowns because of its superior esthetics ,excellent biocompatibility ,and continually improving biomechanical properties. For the long term clinical success of zirconia crowns tooth preparation designs particularly finish line designs and occlusal reduction play significant role. Different finish lines designs such as chamfer and shoulder, play a role in marginal fit of restoration .While assessing zirconia crowns of two finish line designs and two occlusal reduction schemes the participants were divided into three groups based on preparation design: the control group PS (planer occlusal and rounded shoulder) ; first interventional group (flat occlusal and feather); Second interventional group (flat occlusal and rounded shoulder) .To minimize bias the outcome assessor ,participants and statistician were blinded and only investigator will not blinded. After cementation on subsequent follow-up of one year with every three months interval United states Public Health Services Criteria (USPHS) is used for marginal adaptation ,discoloration, fracture and secondary caries, and gingival index score system is used for gingival response.
Second interventional group FS (Flat occlusal + rounded shoulder)
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Control group (PS) | Active comparator | Other: Control group(PS)Planer occlusal scheme with rounded shoulder finish line |
| First intervention group (FF)flat occlusal scheme with feather-edge finish line | Experimental | Procedure: First intervention group(FF) flat occlusal scheme with feather edge finish lineIn this intervention group flat occlusal scheme and feather edge finish line design is followed |
| Second intervention group (FS)flat occlusal scheme with rounded shoulder finish line | Experimental | Procedure: Second intervention group(FS) flat occlusal with rounded shoulder finish line design |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- patients from both genders.
- age range 18-65 years.
- patients with endodontically treated posterior teeth.
Key exclusion criteria (4 listed)
- vital teeth
- anterior teeth.
- edentulous patient.
- patient with history of significant systemic diseases.
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 |
|---|---|---|
| Control group(PS)Planer occlusal scheme with rounded shoulder finish lineControl group (PS) will have planer occlusal scheme with rounded shoulder finish line. | Other | Control group (PS) |
| First intervention group(FF) flat occlusal scheme with feather edge finish lineFirst intervention group we will have flat occlusal scheme with feather edge finish line | Procedure or surgery | First intervention group (FF)flat occlusal scheme with feather-edge finish line |
| Second intervention group(FS) flat occlusal with rounded shoulder finish line designSecond intervention will have flat occlusal scheme with rounded shoulder finish line design | Procedure or surgery | Second intervention group (FS)flat occlusal scheme with rounded shoulder finish line |
Primary outcome
Gingival index score system and United States Public Health Services Criteria(USPHS)
Time frame: One year
Marginal adaptation ,marginal discoloration ,fracture and secondary caries evaluated using (USPHS) United States Public Health Services Criteria and gingival index score system is used to evaluate gingival response.
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 24 Aug 2025.
- Individual participant dataSharing planned: No
Related trials for Zirconia Crowns
Active, not recruiting
Clinical Performance of All-ceramic Posterior Crowns. A Randomized, Prospective Clinical.
Dental Prosthesis Failure
Not yet recruiting
Immediate vs Conventional Loading With Different Crown Materials on Immediately Placed Single Implants
Partial Edentulism, Dental Implant
Active, not recruiting
Gingival Health After Zirconia Versus Stainless Steel Crowns in Children
Gingival Disease
Active, not recruiting
Luting Cements for Prefabricated Zirconia Crown Retention in Primary Anterior Teeth in Children
Dental Caries, Tooth Injuries
Not yet recruiting
Postoperative Bite Force After Bioflx and Zirconia Crowns in Children
Bite Force, Masseter Muscle
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.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing First intervention group(FF) flat occlusal scheme with feather edge finish line and Second intervention group(FS) flat occlusal with rounded shoulder finish line design in people with Zirconia Crowns, run by Armed Forces Institute of Dentistry, Pakistan at 2 sites 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: opening soon, as of the sponsor's last update on 24 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites 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 Saira Bibi (+923481923065, drbibisaira@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Gingival index score system and United States Public Health Services Criteria(USPHS) (time frame: One year). 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 24 Aug 2025.