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Spherical powder for retaining thermosetting acrylic resin veneers
The Journal of Prosthetic Dentistry
|March 1, 1978
Summary
Smaller spherical powder (No. 5) demonstrated superior retentive strength compared to commercial devices. Resin properties and stress angle significantly influence retention, with optimal results achieved using non-brittle resins and specific stress angles.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Dental restorations require effective retentive mechanisms.
- Evaluating novel materials for improved prosthetic retention is crucial.
- Understanding factors influencing retentive strength is key for clinical success.
Purpose of the Study:
- To assess the retentive efficacy of various spherical powder sizes.
- To compare novel retentive devices with existing commercial options.
- To investigate the impact of resin properties and stress application on retentive strength.
Main Methods:
- Preparation and testing of nine different sizes of spherical powders.
- Evaluation of retentive strength against commercially available devices.
- Analysis of the influence of resin physical properties and stress angle on retention.
Main Results:
- Spherical powder size No. 5 exhibited the highest retentive strength among all tested devices.
- Resin brittleness negatively correlated with retentive strength when using No. 5 beads.
- Retentive strength of resin veneers was highly dependent on the angle of stress at the incisal resin.
Conclusions:
- No. 5 spherical powder shows significant promise as a superior retentive device.
- Material properties of resins and precise application of stress are critical for maximizing retentive strength.
- Further research into optimizing resin-bead interactions and stress application is warranted.