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Impression material thickness in stock and custom trays
The Journal of Prosthetic Dentistry
|August 1, 1985
Summary
This study compared impression material thickness between custom acrylic and stock trays, finding a difference less than 1 mm. The cost-effectiveness and convenience of stock trays suggest their use if this minor thickness variation doesn't impact final dental casting success.
Area of Science:
- Dental Materials Science
- Prosthodontics
Background:
- Accurate dental impressions are crucial for successful prosthodontic restorations.
- Custom acrylic resin trays are often advocated for impression accuracy.
- Manufactured stock trays are widely used due to convenience and cost.
Purpose of the Study:
- To compare the impression material thickness between custom acrylic resin trays and manufactured stock trays.
- To evaluate the clinical significance of observed differences in material thickness.
Main Methods:
- Impression material thickness was measured in areas corresponding to prepared teeth.
- Two types of trays were compared: custom acrylic resin trays and manufactured stock trays.
Main Results:
- A mean difference in material thickness of less than 1 mm was found between the two tray types.
- The clinical significance of this difference on impression and casting success remains undetermined.
Conclusions:
- Manufactured stock trays offer significant economic and convenience advantages over custom trays.
- If the minimal thickness difference does not compromise clinical outcomes, stock trays may be a viable alternative.
- Careful fabrication and handling of custom trays are essential to maximize their benefits if material thickness is critical.