Related Experiment Videos
Dimensional change of impressions on sterilization
W K Chia1, L Stevens, K E Basford
1Department of Restorative Dentistry, University of Queensland.
Australian Dental Journal
|February 1, 1990
Summary
Sterilizing dental impressions with glutaraldehyde solution can alter their volume. Acrylic trays significantly impacted impression volume changes, suggesting careful tray material selection is crucial for accurate dental restorations.
Area of Science:
- Dental materials science
- Disinfection and sterilization protocols
- Impression material characterization
Background:
- Dental impressions are critical for prosthodontic restorations.
- Disinfection is essential to prevent cross-contamination in dental settings.
- Glutaraldehyde solutions are commonly used for sterilizing dental impressions.
Purpose of the Study:
- To evaluate the dimensional stability of elastomeric impression materials after sterilization.
- To determine the influence of tray material on impression volume changes post-disinfection.
- To identify optimal impression materials and tray combinations for sterilization.
Main Methods:
- Three elastomeric impression materials were tested.
- Impressions were fabricated in acrylic resin and poly-vinyl-chloride trays.
- Volume changes were measured indirectly from dies after 10-hour glutaraldehyde sterilization.
Main Results:
- One impression material exhibited superior volume stability.
- Acrylic trays significantly affected volume changes in two impression materials.
- Greater volume increases were observed with acrylic trays.
Conclusions:
- Impression material choice impacts dimensional stability after sterilization.
- Acrylic trays can cause significant volume alterations in dental impressions.
- Selecting tray materials with low disinfectant absorption is recommended for impression sterilization.