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The altered cast impression technique revisited
Journal of the American Dental Association (1939)
|November 26, 1999
Summary
The altered cast impression technique for removable partial dentures improves fit, reducing tooth movement and preserving oral structures. This enhances patient comfort and function for those with distal extension edentulism.
Area of Science:
- Dentistry
- Prosthodontics
Background:
- The altered cast impression technique, established over 60 years ago, enhances the fit of removable partial dentures.
- This technique aims to improve the residual ridge-to-dentition relationship, potentially increasing patient satisfaction and preserving oral structures.
Observation:
- Research indicates that improved denture base fit to the residual ridge significantly reduces abutment tooth movement.
- Studies on load distribution demonstrate that well-fitting denture bases favorably distribute stress to supporting bone and abutment teeth.
- Increased residual ridge coverage combined with a well-fitting denture base minimizes stress per unit area, aiding in the preservation of oral structures.
Findings:
- A case study details the successful fabrication and one-year follow-up of a unilateral distal extension removable partial denture.
- The patient reported comfort and ease of use with the new prosthesis, fabricated using the altered cast technique.
Implications:
- Distal extension edentulism can impair a patient's oral function.
- A well-fabricated removable partial denture with proper fit and extensions benefits partially edentulous patients by improving comfort and function.