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Fungal colonisation in digital silicone rubber prostheses
M E Leow1, A K Kour, T J Inglis
1Department of Orthopaedic Surgery, National University of Singapore, Singapore.
Prosthetics and Orthotics International
|February 7, 1998
Summary
Fungal infections can cause black discolouration in silicone rubber prostheses. Daily cleaning with denture cleaner, hot water, or alcohol can prevent fungal growth and maintain prosthesis aesthetics.
Area of Science:
- Mycology
- Biomaterials Science
- Prosthetics
Background:
- Silicone rubber prostheses can be susceptible to fungal discolouration.
- The enclosed, non-porous environment of prostheses traps moisture and warmth, promoting fungal growth.
- Sweat, sebum, and donning agents provide nutrients for fungi on prosthesis surfaces.
Purpose of the Study:
- To report cases of fungal discolouration in silicone rubber prostheses.
- To identify the fungal organisms responsible for discolouration.
- To elucidate factors contributing to fungal colonisation and recommend preventative measures.
Main Methods:
- Case reporting of four instances of prosthesis discolouration.
- Identification of causative fungal species: Candida tropicalis, Trichoderma sp., and Scedosporium prolificans.
- Analysis of environmental and usage factors contributing to fungal growth.
Main Results:
- Four cases of fungal discolouration were documented.
- Candida tropicalis, Trichoderma sp., and Scedosporium prolificans were identified as causative agents.
- Fungal growth resulted in black discolouration, compromising prosthesis aesthetics.
Conclusions:
- Fungal colonisation is a significant issue affecting silicone rubber prostheses.
- Factors like moisture, nutrients, prolonged use, and environmental conditions predispose prostheses to fungal growth.
- Recommended preventative measures include daily cleaning with denture cleaner, hot water (60°C for 15 min), or 70% alcohol, with emphasis on pre-cleaning.