Impression Techniques in Prosthodontics for Partially Edentulous Patients

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.

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.