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Properties of a modified cross-linked silicone for maxillofacial prostheses
J W Farah1, J C Robinson, A Koran
1Department of Biomaterials, University of Michigan, Ann Arbor 48109-1078.
Journal of Oral Rehabilitation
|November 1, 1987
Summary
Modifying Type A adhesive with polydimethyl siloxane (MDX 4-4210) creates pliable maxillofacial prostheses. Varying ratios alter mechanical properties, enhancing tissue-like simulation for improved patient outcomes.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Prosthodontics
Background:
- Maxillofacial prostheses require mechanical properties that closely mimic facial tissues.
- Current materials may not fully replicate the pliability and flexibility of natural facial structures.
- Silicone-based adhesives offer potential for customization.
Purpose of the Study:
- To investigate the modification of a silicone adhesive with a polydimethyl siloxane to enhance pliability.
- To determine the mechanical properties of modified silicone formulations.
- To assess the potential for creating more tissue-like maxillofacial prostheses.
Main Methods:
- A Type A adhesive (dimethyl siloxane-triacetoxy terminated silane) was modified with MDX 4-4210 (polydimethyl siloxane with vinyl groups).
- Various ratios of Type A adhesive to MDX 4-4210 were prepared.
- Mechanical properties including hardness, modulus, tensile strength, elongation, and tear strength were measured.
Main Results:
- Increasing MDX 4-4210 content decreased hardness, modulus, and ultimate tensile strength.
- Percentage elongation increased with higher MDX 4-4210 content.
- Initial tear strength remained stable, except for a significant decrease in the 50/50 mix.
Conclusions:
- Varying the ratio of Type A adhesive and MDX 4-4210 allows for tunable mechanical properties.
- This modification approach can yield maxillofacial prostheses with improved pliability.
- The customized mechanical characteristics offer closer simulation of facial tissue properties.