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Questions and Answers
Which term describes a fixed or removable prosthesis designed to enhance esthetics and function for a limited period of time after which it is to be replaced by a definitive prosthesis?
What is the primary purpose of provisional restorations in dentistry?
What are the mechanical requirements for provisional restorations?
What is the purpose of pulp protection in provisional restorations?
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Which term refers to a 3-dimensional model of a final prosthesis?
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Which material is known for its increased mechanical properties, decreased shrinkage, and better marginal integrity and fit, making it suitable for long-term provisionals?
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What method of fabrication involves commercially available formers that are slightly altered and modified to fit the tooth for single-tooth restorations?
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Which material is known for its increased strength, hardness, and marginal fit, but is considered expensive for provisional restorations?
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What is the external surface form involved in forming the external contour of the crown or bridge in the process of provisional restoration?
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Which type of provisional restoration involves a matrix derived from the original tooth or a modified diagnostic cast in its fabrication process?
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Study Notes
Provisional Restorations
- A provisional restoration is either a fixed or removable prosthesis aimed at improving aesthetics and function temporarily until a definitive prosthesis is crafted.
- Its primary purpose is to protect prepared teeth, maintain esthetics, and facilitate function while the final restoration is being made.
Mechanical Requirements
- Provisional restorations must exhibit adequate strength and resistance to functional forces to prevent fracture under normal usage.
- They should have an acceptable contour and occlusion to avoid interferences with neighboring teeth.
Pulp Protection
- Pulp protection is essential in provisional restorations to prevent thermal, chemical, and mechanical irritation to the dental pulp during the interim period.
3D Model Terminology
- A 3-dimensional model that represents the final prosthesis is known as a "prototype" or "working model" used in the planning of the definitive restoration.
Material Properties
- Polycarbonate is recognized for its superior mechanical properties, reduced shrinkage, and enhanced marginal integrity and fit, making it ideal for long-term provisional restorations.
- Bis-acrylic resins are favored for their increased strength, hardness, and superior marginal fit, despite being relatively costly for provisional applications.
Fabrication Method
- The "vacuum form" method involves using commercially available formers that are slightly modified to fit the specific tooth, useful for creating single-tooth restorations.
External Surface Form
- The external surface form refers to the profile that shapes the outer contour of the crown or bridge during the provisional restoration process.
Matrix Types
- A "custom matrix" provisional restoration uses a matrix obtained from the original tooth or a modified diagnostic cast during its fabrication, allowing for precise fitting and contouring.
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Description
Test your knowledge about provisional restorations, including their purpose, characteristics, and fabrication process. Learn about the role of provisional restorations in dental prosthetics.
