NCT07139613

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

Evaluation of Zirconia Crown Restoring Endodontically Treated Posterior Teeth With Two Finish Line Designs and Two Occlusal Reduction Schemes(a Randomized Clinical Trial)

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 66 (estimated)
• Sponsor: Armed Forces Institute of Dentistry, Pakistan · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Accepted

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

Interventions

Type	Name	Description
OTHER	Control group(PS)Planer occlusal scheme with rounded shoulder finish line	Control group (PS) will have planer occlusal scheme with rounded shoulder finish line.
PROCEDURE	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
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

Timeline

• Start date: 2025-08-01
• Primary completion: 2026-08-01
• Completion: 2026-10-01
• First posted: 2025-08-24
• Last updated: 2025-08-24

Locations

2 sites across 1 country: Pakistan