16 Questions
What is the purpose of provisional restorations?
To protect pulpal tissue of prepared abutments
What are the biologic requirements of provisional restorations?
Protection against thermal, chemical, and physical irritation
What do provisional restorations help prevent?
Dental caries
What should provisional restorations resist?
Adequate thickness to withstand occlusal forces
What is the esthetic requirement of provisional restorations?
Good marginal fit, proper contour, and a smooth surface
What is the mechanical requirement of provisional restorations?
Resist functional load adequate thickness to withstand occlusal forces
What is the purpose of slightly enlarging the connector area in a fixed partial denture?
To prevent fracture
Which factor is NOT considered when selecting the type of provisional restoration?
Chemical composition
What method of fabrication is used for custom-made provisional restorations?
Indirect
Which material exhibits increased shrinkage and heat generation in provisional restorations?
Poly-methyl Methacrylate
What is the primary purpose of resin-based provisional restorations?
Improved marginal integrity and fit
Which factor is NOT a consideration for external surface form in provisional fixed bridg?
Vacuum formed thermoplastic sheets
What is the primary purpose of enlarging the connector area in a fixed partial denture?
To resist functional load
Which material is NOT commonly used for fabricating metal-based provisional restorations?
Microfilled Composite
What type of impression is used for fabricating custom-made provisional restorations?
Alginate impression
Which material exhibits increased strength, hardness, and marginal fit in provisional restorations?
Urethane Dimethacrylate
Study Notes
Purpose and Requirements of Provisional Restorations
- The primary purpose of provisional restorations is to maintain aesthetics, allow for normal oral function, and prevent tooth migration or supra-eruption.
- Biologic requirements of provisional restorations include maintaining pulp vitality, protecting soft tissues, and preventing caries and plaque accumulation.
- Provisional restorations help prevent tooth sensitivity,牙migmatism, and supra-eruption of adjacent teeth.
Mechanical and Esthetic Requirements
- Esthetic requirement of provisional restorations is to replicate the natural tooth form and color.
- Mechanical requirement of provisional restorations is to resist chewing forces and maintain marginal integrity.
Fabrication and Materials
- Slightly enlarging the connector area in a fixed partial denture allows for easier fabrication and maintenance of the provisional restoration.
- The type of provisional restoration is selected based on factors such as the patient's oral habits, span of the edentulous area, and material properties.
- A factor NOT considered when selecting the type of provisional restoration is the dentist's preference.
- Custom-made provisional restorations are fabricated using the indirect fabrication method.
- Resin-based materials exhibit increased shrinkage and heat generation in provisional restorations.
- The primary purpose of resin-based provisional restorations is to provide a temporary aesthetic solution.
- Metal-based provisional restorations are commonly fabricated using acrylic or composite resins, but NOT ceramic materials.
- An impression type used for fabricating custom-made provisional restorations is a master impression.
- Acrylic resin exhibits increased strength, hardness, and marginal fit in provisional restorations.
Test your knowledge about provisional restorations, temporary prosthesis designed to enhance esthetics and function for a limited period of time before being replaced by definitive prosthesis. Learn about their purpose, characteristics, and fabrication process in this quiz.
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