Controlling the porosity and density of silicone rubber prosthetic materials
| Autor: | Alfred L Frost, Kenneth Kent, Keith Kent, Norman G. Schaaf, Robert F. Zeigel |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
chemistry.chemical_classification
Materials science Chemical Phenomena Maxillofacial Prosthesis Chemistry Physical Surface Properties technology industry and agriculture Polymer equipment and supplies medicine.disease_cause Silicone rubber complex mixtures Silicone Elastomers Chemistry chemistry.chemical_compound chemistry Mold Microscopy Electron Scanning medicine Oral Surgery Composite material Porosity Prepolymer |
| Zdroj: | The Journal of Prosthetic Dentistry. 50:230-236 |
| ISSN: | 0022-3913 |
| DOI: | 10.1016/0022-3913(83)90023-9 |
| Popis: | The chemical components of the four silicone rubber polymers were reviewed. Methods of controlling the porosity and density of both the one-component semisolid prepolymer and the two-component fluid prepolymer systems were evaluated. The variables examined were deairing of the fluid systems; trial packing, pressure sealing, and processing of the semisolid materials; injection versus hand packing of the mold; the effects of moist-heat versus dry-heat application during processing; and the need for investment of the mold within the confines of a closed flask. It can be concluded that porosity of medical-grade silicone rubber polymers may be totally prevented, or accurately controlled, by proper handling techniques. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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