Comparative evaluation of occlusal wear of computer designed Polymethyl Methacrylate (PMMA) provisional crowns fabricated by milling and 3D printing -A split mouth randomized trial
Trial Snapshot
- Phase
- Phase 2
- Status
- Not yet recruiting
- Sponsor
- Enrollment
- 11
- Locations
- 1
- Primary Endpoint
- To evaluate the occlusal wear of computer designed polymethyl methacrylate based milled and 3D printed provisional crowns with natural antagonist teeth in micrometers
Study Overview
Brief Summary
Wear is the gradual removal of material from surfaces as a result of mechanical or chemical injuries, it can occur through 3 processes erosion attrition and abrasion. Literature is filled with studies on wearcharacteristics of various definitive restorative materials. There is scarcityof in vivo study investigating the wear of PMMA based provisional crowns inhuman dentition. There is in vivo study related to wear resistance of CAD CAMprovisional implant restoration. There is in vitro study related to wear ofmilled and 3D printed veneers. There is lack of a clinical study comparingthe occlusal wear of computer designed Polymethyl Methacrylate provisionalcrowns made by milling and 3D printing. The provisional crowns set the stagefor a definitive crown. Occlusal stability should then be maintained prior togiving a definitive crown. Therefore this study is planned to compare theocclusal wear of computer designed PMMA provisional crown fabricated by millingand 3D printing.
Study Design
- Study Type
- Interventional
- Allocation
- Computer generated randomization
- Masking
- Outcome Assessor Blinded
Eligibility Criteria
- Ages
- 25.00 Year(s) to 50.00 Year(s) (—)
- Sex
- All
Inclusion Criteria
- •Patients requiring bilateral posterior mandibular complete crowns with normal periapical architecture.
- •Teeth restorable with a minimum crown to root ratio of at least 1:
- •Teeth with healthy opposing natural teeth.
- •Good oral hygiene and periodontal status.
- •Full complement of teeth (excluding 3rd molars).
- •Patients who will be available for the required follow up period.
- •Patients giving positive informed consent 8)Age group 25-50 years.
Exclusion Criteria
- •Patients with developmental defects of enamel and dentin.
- •Patients who have undergone re-RCT ( root canal treatment ) in mandibular molars.
- •Parafunctional habits like bruxism, clenching.
- •Temporomandibular joint disorders.
- •Fluorosis, calcium metabolic disorders, osteoporosis.
- •Opposing teeth with caries or wear 8)Malocclusion 9)Systemic diseases 10)Smoking.
Outcomes
Primary Outcomes
To evaluate the occlusal wear of computer designed polymethyl methacrylate based milled and 3D printed provisional crowns with natural antagonist teeth in micrometers
Time Frame: 3 months after cementation of crown.
Secondary Outcomes
- To evaluate the occlusal wear of natural antagonist enamel with computer designed polymethyl methacrylate based milled and 3D printed provisional crowns in micrometers.(3 months after cementation.)