Celtra Quatro Crown Study
Study Details
Study Description
Brief Summary
This investigation will be a clinical trial to study the performance of a newly developed high strength ceramic material for crowns. The ceramic has been approved by the FDA for patient treatment. A computer technique will be used to fabricate the crowns in a single appointment without the need for a temporary crown or second appointment. Two adhesive resin cement techniques will be used to hold the crown to the tooth and they will be evaluated for creating sensitivity to the tooth. The purpose of the study is to measure how well the high strength crowns function over an extended period of time.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
A recently introduced high strength, zirconia-reinforced lithium silicate (ZLS) ceramic material for full contour CAD/CAM crowns is reported to offer a more translucent and esthetic high strength crown in a more efficient oven firing process. Celtra Quatro (Dentsply Sirona) is submitted to a high temperature matrix firing cycle in the SpeedFire oven (Dentsply Sirona) to achieve high strength in less than 5 minutes following milling. It has a reported flexural strength of 650 MPa compared to 450 MPa for lithium disilicate glass ceramic and > 900 MPa for 3mol% full contour zirconia.
Most glass ceramic materials have a recommended material thickness of 1.5 mm to maximize the strength potential of the material. Occlusal reduction resulting in a crown thickness of 1.0 mm, equitable to the recommendation for full contour zirconia crowns, may be considered sufficient to maintain the desired high strength attained by the ZLS material. This would also result in a more conservative tooth preparation.
Another potential advantage of high strength ZLS crowns to many clinicians is that they may be inherently strong enough to allow for conventional cementation. However, for less retentive preparations, it may also be possible to adhesively bond the crowns through the use of adhesive resin cements.
It is the intent of this investigation to evaluate the clinical application and performance of the new high strength, zirconia-reinforced lithium silicate material (Celtra Quatro) for CAD/CAM-generated chair-side crown applications. Patients will be recruited to have 60 Celtra Quatro crowns prepared and delivered during a single dental appointment using a chairside CAD/CAM system (CEREC/Dentsply Sirona). The crowns will be recalled at 6 months and then yearly for 5 years to evaluate long-term outcomes of the crowns.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Crown, 1.0mm thickness, Calcium Aluminate Ionomer Cement occlusal thickness of 1.0 mm delivered with a conventional Calcium Aluminate Ionomer cement |
Device: Celtra Quatro
Full ceramic crowns will be made from the high strength ceramic, Celtra Quatro
|
| Experimental: Crown, 1.5mm thickness, Calcium Aluminate Ionomer Cement occlusal thickness of 1.5 mm delivered with a conventional Calcium Aluminate Ionomer cement |
Device: Celtra Quatro
Full ceramic crowns will be made from the high strength ceramic, Celtra Quatro
|
| Experimental: Crown, 1.0mm thickness, dual cure resin cement occlusal thickness of 1.0 mm delivered with Prime and Bond elect Universal Bond in total etch mode with a dual cure resin cement |
Device: Celtra Quatro
Full ceramic crowns will be made from the high strength ceramic, Celtra Quatro
|
| Experimental: Crown, 1.5mm thickness, dual cure resin cement occlusal thickness of 1.5 mm delivered with Prime and Bond elect Universal Bond in total etch mode with a dual cure resin cement |
Device: Celtra Quatro
Full ceramic crowns will be made from the high strength ceramic, Celtra Quatro
|
Outcome Measures
Primary Outcome Measures
- Crown failure [from delivery of the crown up to 5 years]
Restoration failure is scored by visual loss of the crown from the tooth requiring replacement of the study crown with a new crown at any time between delivery and five years.
Secondary Outcome Measures
- Crown loss of retention [from delivery of crown up to 5 years]
Loss of retention is measured as visual detachment or dislodgment of the crown from the tooth without fracture of the crown requiring recementation of the crown at any time between delivery and five years.
- Tooth sensitivity [from delivery of crown up to 5 years]
Patient described sensitivity on a scale of 1 to 4, where 1 means absence of sensitivity (pain) and four means severe discomfort noted routinely with cold or pressure stimulation.
- Margin staining [from delivery of crown up to 5 years]
Margin staining is categorized based on modified US Public Health Service criteria using a four point scale where 1 is no staining and 4 is penetrating stain involving more than 50% of the margin.
Eligibility Criteria
Criteria
Inclusion Criteria:
-
must have at least one carious lesion or defective restoration or fractured tooth in a molar or premolar
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reason for restoration should extend more than one-half the intercuspal width of the tooth requiring a full crown restoration
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Teeth to be vital and asymptomatic prior to treatment
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No more than two restorations will be placed per patient. If a patient presents with more than two acceptable teeth for the study, molar teeth will be included prior to premolar teeth.
Exclusion Criteria:
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Devital or sensitive teeth
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Teeth with prior endodontic treatment of any kind
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Teeth with a history of direct or indirect pulp capping procedures
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Patients with significant untreated dental disease to include periodontitis and rampant caries
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Pregnant or lactating women
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Patients with a history of allergies to any of the materials to be used in the study
-
Patients unable to return for the recall appointments
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | School os Dentistry | Ann Arbor | Michigan | United States | 48109 |
Sponsors and Collaborators
- University of Michigan
- Dentsply Sirona Implants
Investigators
- Principal Investigator: Dennis Fasbinder, DDS, University of Michigan
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- HUM00155462