TetricCAD Crown Clinical Study
- Conditions
- Decayed ToothFractured ToothUnsatisfactory Restoration of Tooth
- Interventions
- Device: Tetric CAD
- Registration Number
- NCT03716817
- Lead Sponsor
- University of Michigan
- Brief Summary
This investigation will be a clinical trial to study the performance of a new resin-based ceramic material for crowns. The material 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. The purpose of the study is to measure how well the high strength crowns function over an extended period of time.
- Detailed Description
The study will be composed of 50 crowns placed in adult patients that have been identified as requiring at least one crown on a posterior tooth. A maximum of two crowns per patient will be completed. All the crowns will be made from the same resilient ceramic CAD/CAM block(Tetric CAD/Ivoclar Vivadent). The crowns are placed using an adhesive bonding process including a total etch process with a universal adhesive (Adhese by Ivoclar Vivadent) and dual-cured resin cement (Variolink Esthetic by Ivoclar Vivadent). The crowns are planned to be evaluated at 6 months, 1 year, 2 years, 3 years, and if funding permits, 4 years, and 5 years. At each appointment, an examination of the crown will be completed as well as clinical photographs, an intraoral digital scan, and impression of the crown.
Recruitment & Eligibility
- Status
- ACTIVE_NOT_RECRUITING
- Sex
- All
- Target Recruitment
- 50
- must have at least one carious lesion or defective restoration or fractured tooth in a molar or premolar
- reason for restoration should extend more than one-half the intercuspal width of the tooth requiring a full crown restoration
- Teeth to be vital and asymptomatic prior to treatment
- 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.
- Devital or sensitive teeth
- Teeth with prior endodontic treatment of any kind
- Teeth with a history of direct or indirect pulp capping procedures
- Patients with significant untreated dental disease to include periodontitis and rampant caries
- Pregnant or lactating women
- 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
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Tetric CAD Crown Tetric CAD Tetri CAD crowns will hand polished and cemented with a dual cured resin cement (Variolink Esthetic by Ivoclar Vivadent).
- Primary Outcome Measures
Name Time Method Crown failure from delivery of the crown up to 5 years Crown failure includes fracture of the crown or loss of the crown requiring placement of a new crown at any time between delivery and five years.
- Secondary Outcome Measures
Name Time Method Tooth sensitivity from delivery of the 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.
Crown loss of retention from delivery of the crown up to 5 years Loss of retention is measured as detachment of the crown from the tooth without fracture of the crown requiring recementation of the crown.
Margin staining from delivery of the 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.
Trial Locations
- Locations (1)
University of Michigan School of Dentistry
🇺🇸Ann Arbor, Michigan, United States