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A conservative approach to rebasing an implant-retained fixed complete denture
Tarek El-Kerdani1, Arthur Nimmo2
1Clinical Associate Professor, Department of Restorative Dental Sciences, University of Florida College of Dentistry, Gainesville, Fla.
The Journal of Prosthetic Dentistry
|April 12, 2014
Summary
Dental prostheses wear over time, requiring acrylic resin replacement. A new technique safely removes old resin by heating it past its glass transition temperature, preserving the metal framework and protecting technicians from hazardous by-products.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Biomaterials Engineering
Background:
- Acrylic resin teeth in implant-retained fixed complete dental prostheses undergo wear, necessitating replacement.
- Current acrylic resin removal methods (burning, grinding) pose risks to dental technicians and prosthesis integrity.
- Contamination of metal frameworks and gold cylinders is a concern with conventional removal techniques.
Purpose of the Study:
- To present a novel, safe, and effective method for removing aged acrylic resin from dental prostheses.
- To preserve the structural integrity of the metal framework during resin removal.
- To mitigate risks associated with hazardous by-products for dental laboratory technicians.
Main Methods:
- The technique involves controlled heating of the prosthesis.
- The acrylic resin is heated beyond its glass transition temperature (Tg).
- Heated resin is then safely peeled from the metal framework.
Main Results:
- The described heating method allows for clean removal of the acrylic resin.
- Preservation of the underlying metal framework and gold cylinders is achieved.
- Eliminates the need for flame or grinding, reducing technician exposure to hazards.
Conclusions:
- This heating technique offers a safer alternative for replacing worn acrylic resin in dental prostheses.
- It effectively preserves the metal framework, ensuring longevity of the restoration.
- Minimizes occupational hazards for dental laboratory personnel involved in prosthesis repair.
