RTV silicone elastomers in hand prosthetics: properties, applications and techniques

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Room-temperature-vulcanising (RTV) silicone elastomers are versatile materials used in various applications.
• Their specific properties make them suitable for fabricating medical devices, including prostheses.
• Understanding the different types and their characteristics is crucial for optimal use in hand prosthetics.

Purpose of the Study:

• To provide an overview of RTV silicone elastomers.
• To discuss the properties and applications of three distinct RTV silicone types in hand prosthesis production.
• To highlight potential issues like cure inhibition and provide preventative measures.

Main Methods:

• Review of vinyl polysiloxanes for silicone impression materials.
• Analysis of RTV-2 dimethyl polysiloxanes for mould-making and prosthesis fabrication.
• Discussion of RTV-1 dimethyl polysiloxanes for surface modification and waterproofing.
• Identification of cure-inhibiting contaminants for addition-curing RTV silicones.

Main Results:

• Vinyl polysiloxanes offer rapid curing, high detail reproduction, and easy removal for impressions.
• RTV-2 silicones provide excellent mould-making capabilities with adjustable properties and durability.
• RTV-1 silicones are suitable for surface treatments, offering adhesion and waterproofing.
• Contaminants like sulphur, tin, and nitrogen can inhibit the cure of addition-curing RTV silicones.

Conclusions:

• Different RTV silicone types possess unique properties beneficial for specific stages of hand prosthesis fabrication.
• Careful selection and handling of RTV silicones, including awareness of potential contaminants, are essential for successful outcomes.
• This technical note serves as a guide for clinicians and technicians working with RTV silicones in prosthetics.