Zirconia Crowns
Conditions
Keywords
Zirconia crowns assessment with two finish line design and two occlusal reduction schemes
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)
Interventions
OTHERControl group(PS)Planer occlusal scheme with rounded shoulder finish line
Control group (PS) will have planer occlusal scheme with rounded shoulder finish line.
PROCEDUREFirst 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
PROCEDURESecond intervention group(FS) flat occlusal with rounded shoulder finish line design
Second intervention will have flat occlusal scheme with rounded shoulder finish line design
Sponsors
Armed Forces Institute of Dentistry, Pakistan
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Gingival index score system and United States Public Health Services Criteria(USPHS) | 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. |
Countries
Pakistan
Contacts
Primary ContactSaira Bibi
Outcome results
None listed