We Will Assess Zirconia Crown Restoring Endodontically Treated Posterior Teeth With Two Finish Line Designs and Two Occlusal Reduction Schemes

NCT ID: NCT07139613

Last Updated: 2025-08-24

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 66 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-08-31
• Study Completion Date: 2026-10-31

Brief 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 ,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)

Conditions

Zirconia Crowns

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: DOUBLE

Study Groups

Control group (PS)

Group Type: ACTIVE_COMPARATOR

Control group(PS)Planer occlusal scheme with rounded shoulder finish line

Intervention Type: OTHER

Control group (PS) will have planer occlusal scheme with rounded shoulder finish line.

First intervention group (FF)flat occlusal scheme with feather-edge finish line

In this intervention group flat occlusal scheme and feather edge finish line design is followed

Group Type: EXPERIMENTAL

First intervention group(FF) flat occlusal scheme with feather edge finish line

Intervention Type: PROCEDURE

First intervention group we will have flat occlusal scheme with feather edge finish line

Second intervention group (FS)flat occlusal scheme with rounded shoulder finish line

Group Type: EXPERIMENTAL

Second intervention group(FS) flat occlusal with rounded shoulder finish line design

Intervention Type: PROCEDURE

Second intervention will have flat occlusal scheme with rounded shoulder finish line design

Interventions

Control group(PS)Planer occlusal scheme with rounded shoulder finish line

Control group (PS) will have planer occlusal scheme with rounded shoulder finish line.

Intervention Type: OTHER

First intervention group(FF) flat occlusal scheme with feather edge finish line

First intervention group we will have flat occlusal scheme with feather edge finish line

Intervention Type: PROCEDURE

Second intervention group(FS) flat occlusal with rounded shoulder finish line design

Second intervention will have flat occlusal scheme with rounded shoulder finish line design

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

• patients from both genders.
• age range 18-65 years.
• patients with endodontically treated posterior teeth.

Exclusion Criteria

• vital teeth
• anterior teeth.
• edentulous patient.
• patient with history of significant systemic diseases.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Armed Forces Institute of Dentistry, Pakistan

OTHER

Sponsor Role: lead

Responsible Party

Saira Bibi

Registrar prosthodontics

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Armed Forces Institute of Dentistry

Rawalpindi, Punjab Province, Pakistan

Armed Forces Institute of Dentistry

Rawalpindi, Punjab Province, Pakistan

Countries

Pakistan

Central Contacts

Saira Bibi

Role: CONTACT

drbibisaira@gmail.com

+923481923065

Facility Contacts

Saira Bibi Registrar prosthodontics

Role: primary

drbibisaira@gmail.com

03339388357

Saira Bibi Registrar prosthodontics

Role: primary

drbibisaira@gmail.com

03339388357

Other Identifiers

zirconia crowns

Identifier Type: -

Identifier Source: org_study_id