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Pitting corrosion for retaining acrylic resin facings
The Journal of Prosthetic Dentistry
|September 1, 1979
Summary
Pitting corrosion creates uniform undercuts on metal castings, improving resin facing retention. These retentive pits offer superior strength and sealing compared to traditional methods.
Area of Science:
- Materials Science
- Corrosion Engineering
- Biomaterials
Background:
- Dental restorations require durable and well-sealed interfaces between metal castings and resin materials.
- Current methods for enhancing resin adhesion may have limitations in uniformity and retentive strength.
Purpose of the Study:
- To investigate the efficacy of pitting corrosion in creating uniform undercuts for improved resin facing retention on metal castings.
- To compare the retentive strength and marginal sealing of pitting corrosion-induced undercuts with conventional surface treatments.
Main Methods:
- Utilizing a specifically shaped cathode to achieve uniform pit distribution on metal casting surfaces.
- Controlling pit size by adjusting the duration of the pitting corrosion treatment.
- Evaluating the retentive strength and marginal sealing of the treated surfaces.
Main Results:
- Pitting corrosion successfully generated uniformly distributed undercuts on the metal casting surfaces.
- The size of the pits could be modulated by controlling the pitting treatment time.
- The retentive pits demonstrated excellent retentive strength and marginal sealing capabilities.
Conclusions:
- Pitting corrosion is an effective method for creating retentive undercuts on metal castings for resin facing applications.
- The uniform distribution and controllable size of pits enhance the performance of dental restorations.
- This technique offers a significant advantage over spherical powders and beads for improved adhesion and sealing.
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