Cristofoli UV Chamber (Dental UV Sterilizer Cabinet)
Pack Sizes Available
Product Description
Technical Specifications
- UV Wavelength: 254nm (UV-C germicidal wavelength)
- Capacity: 12 or 15 stainless steel autoclavable trays
- Interior Material: Rust-proof stainless steel mirror-finish (maximises UV reflection and coverage)
- Safety Feature: Micro door switch — UV source cuts off immediately when door is opened
- Power: Typically 8-15W UV tube; 220-240V AC supply
- Outer Dimensions (12-tray): Approximately 18 x 32 x 59 cm (model-specific)
Frequently asked questions
No. A UV chamber is not a primary sterilisation method for dental instruments used on patients. UV-C radiation does not penetrate packaged or wrapped instruments, and its surface disinfection action is insufficient to achieve the sterility assurance level required for reusable dental instruments. The autoclave (steam steriliser) remains the primary sterilisation method. The UV chamber's role is to maintain the sterility of already-sterilised instruments during storage before use.
UV-C radiation at 254nm is absorbed by the DNA and RNA of microorganisms, forming pyrimidine dimers that prevent replication. This disrupts the microorganism's ability to reproduce and causes cell death at sufficient exposure doses. UV-C is effective against bacteria, viruses, and fungi on exposed surfaces. The limitation is that it acts only on directly exposed surfaces — shadows, packaging, and depth within materials are not affected.
Dental UV chambers are used for storage of dental impressions between taking and laboratory dispatch (to reduce microbial contamination before the laboratory handles them), temporary storage of orthodontic appliances (retainers, aligners) between patient visits, storage of sterilised cotton rolls, and maintaining cleanliness of non-autoclavable items such as mirrors, rulers, and photographic equipment that cannot withstand heat sterilisation.
UV-C germicidal lamps typically have a rated service life of approximately 8,000-10,000 hours of use. After this point, the UV output drops below effective germicidal levels even if the lamp continues to emit visible light. Regular replacement of the UV tube is necessary to maintain the chamber's effectiveness. Most UV chamber manufacturers recommend annual or biannual lamp replacement depending on usage frequency.
UV-C radiation is harmful to human skin and eyes. Quality dental UV chambers include a micro door switch that automatically cuts power to the UV lamp when the door is opened, preventing accidental exposure. The stainless steel cabinet body provides containment of UV radiation during operation. Staff should never bypass or defeat the door safety switch. The UV-proof viewing window on some models allows visual confirmation of lamp operation without opening the door.
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