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PubMed1977

Otologic complications following the use of a high-speed air-turbine handpiece.

The use of high-speed instruments may result in subcutaneous air in the face and neck. Hearing loss and otalgia have been added to the previously reported sequelae. Careful use of air-driven high-speed handpieces around areas of weakened and disrupted oral tissues may help avoid subcutaneous emphysema. Awareness of this entity plays a significant role in appropriate diagnosis and treatment.

Adult↗
PubMed1983

Steam sterilization of air turbine dental handpieces.

The efficacy of autoclaving high-speed dental handpieces was tested in two types of downward displacement steam sterilizers (instrument autoclaves), commonly used in the dentist's office. Eight series of experiments were performed with various sterilization schedules. Lubrication oils with or without antimicrobial agent were used in four of the series. Each handpiece was inoculated with 1 ml of a suspension containing equal amounts of saliva and spores of Bacillus stearothermophilus (approx. 10(6) spores/ml). Neither sterilization at 120-124 degrees C for 20 min nor at 134-136 degrees C for 10 min resulted in complete inactivation of the spores in series in which the instruments were tested without oil or with oil containing no antimicrobial agent. However, when the handpieces were lubricated with oil containing isopropanol and formaldehyde and the schedule 134-136 degrees C/10 min was used, no growth was observed. The results indicate that instrument autoclaves with built-in programs of 120-124 degrees C/20 min and 134-136 degrees C/10 min could have insufficient capacity to sterilize lubricated or unlubricated dental handpieces. The use of oils containing an antimicrobial agent can overcome this problem.

Dental High-Speed Equipment↗
PubMed1990

New integrated gas turbine CHP (combined heat and power) and incinerator plant.

Despite the complex nature of the project, the clients brief of a 14 month design and installation period was achieved within the approved budget of 2.5 million pounds. Early performance figures indicate that the scheme is on target to achieve the original payback of under four years. Queen Elizabeth Hospital: installation of integrated combined heat and power plant. Client: Central Birmingham Health Authority. Consulting Engineers/Project Managers: Yates, Edge and Partners. Architects: Temple Cox and Nichols. Structural Engineers: Peel and Fowler. Quantity Surveyor: West Midlands Regional Health Authority.

England↗