An interventional study of Control group(PS)Planer occlusal scheme with rounded shoulder finish line and First intervention group(FF) flat occlusal scheme with feather edge finish line in Zirconia Crowns, sponsored by Armed Forces Institute of Dentistry, Pakistan. Not yet recruiting at 2 sites in Pakistan. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-24.
Sponsored by Armed Forces Institute of Dentistry, Pakistan · Not applicable, Interventional, and Other
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.
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)
Armed Forces Institute of Dentistry, Pakistan is the lead sponsor of 27 studies on the registry; 10 are open to participants now.
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Other: Control group(PS)Planer occlusal scheme with rounded shoulder finish line
In this intervention group flat occlusal scheme and feather edge finish line design is followed
Procedure: First intervention group(FF) flat occlusal scheme with feather edge finish line
Procedure: Second intervention group(FS) flat occlusal with rounded shoulder finish line design
Control group (PS) will have planer occlusal scheme with rounded shoulder finish line.
First intervention group we will have flat occlusal scheme with feather edge finish line
Second intervention will have flat occlusal scheme with rounded shoulder finish line design
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.
Time frame: One year
Plan to share: No
No publications or documents are linked to this record.
Start is estimated for Aug 2025; primary completion for Aug 2026, 12 months later.
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This study is not yet recruiting, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.
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Armed Forces Institute of Dentistry, Pakistan