Podcast
Questions and Answers
What is the definition of an impression in dentistry?
What is the definition of an impression in dentistry?
- It is a positive reproduction of dental structures from which a positive cast can be made.
- It is a negative reproduction of dental structures from which a positive cast can be made. (correct)
- It is a positive reproduction of dental structures from which a negative cast can be made.
- It is a negative reproduction of dental structures from which a negative cast can be made.
What are the types of impression materials mentioned in the text?
What are the types of impression materials mentioned in the text?
- Zinc oxide Eugenol, Impression material Hydrocolloids, Alginate, Polyethers
- Plaster, Impression Compound, Alginate, Polyethers
- Plaster, Zinc oxide Eugenol, Agar, Condensation silicone (correct)
- Impression Compound, Impression waxes, Reversible Polysulfides, Addition silicone
What are the two types of impressions mentioned in the lecture outline?
What are the two types of impressions mentioned in the lecture outline?
- Stock impression and Custom impression
- Anatomic form impression and Special impression
- Elastic impression and Non-elastic impression
- Primary impression and Secondary impression (correct)
What does RPD stand for in the context of the lecture outline?
What does RPD stand for in the context of the lecture outline?
What is the purpose of obtaining functional support for the distal extension base in special impression techniques?
What is the purpose of obtaining functional support for the distal extension base in special impression techniques?
Flashcards
Dental Impression
Dental Impression
A negative copy of teeth and surrounding tissues used to create a positive model.
Impression Materials
Impression Materials
Materials used to capture tooth and tissue details for impression-taking.
Primary Impression
Primary Impression
The initial impression taken to capture the overall shape of the mouth.
Secondary Impression
Secondary Impression
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Removable Partial Denture (RPD)
Removable Partial Denture (RPD)
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Study Notes
Definitions and Concepts in Dentistry
- An impression in dentistry is a negative representation of the contours of teeth and surrounding tissues, used to create accurate models for dental procedures.
Types of Impression Materials
- Common types of impression materials include:
- Alginate: A hydrophilic material used for preliminary impressions.
- Polysulfide: Offers high accuracy, often used for final impressions.
- Polyether: Known for precision and stability.
- Silicone: Available in two types (addition-cure and condensation-cure) for different clinical needs.
Types of Impressions
- Two main types of impressions are:
- Preliminary Impressions: Used to create study models for treatment planning.
- Final Impressions: Required for fabricating restorations, dentures, or appliances with high accuracy.
RPD Definition
- RPD stands for Removable Partial Denture, a prosthetic device designed to replace one or more missing teeth in a partially edentulous arch while being removable by the patient.
Functional Support in Impressions
- The purpose of obtaining functional support for the distal extension base in special impression techniques is to ensure effective distribution of occlusal forces and enhance the stability of the prosthesis during function, restraining movement and maximizing comfort for the patient.
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Description
Learn about impression techniques for partially edentulous patients in prosthodontics, including the definition of impression, types of impression materials and trays, and the procedure for 1ry and 2nd impressions. Explore the classification of impressions for RPD and anatomic form impressions.
