Psychoacoustic evaluation of noise emitted by dental air-turbine handpieces
نویسندگان
چکیده
منابع مشابه
Comparison of rotational speeds and torque properties between air-bearing and ball-bearing air-turbine handpieces.
We examined the effects of air pressure on the free-running speed of air-bearing and torque-type ball-bearing air-turbine handpieces. The air pressure for the former should be kept at a certain high level to maintain the stable super-thin air-bearing film and to provide the quasi-constant speed of around 420,000 to 480,000 rpm. On the other hand, the air pressure for the latter could be adjuste...
متن کاملInfluence of number of dental autoclave treatment cycles on rotational performance of commercially available air-turbine handpieces.
The influence of number of autoclave treatment cycles (N) on rotational speed and total indicated run-out of commercially available air-turbine handpieces from five manufacturers was investigated at N=0, 50, 100, 150, 200, 250 and 300 cycles, and the significance in the test results was assessed by Dunnett's multiple comparison test. Some air-turbine handpieces showed the significant difference...
متن کاملAdvanced Procedures for Psychoacoustic Noise Evaluation
In addition to traditional, purely physical noise measurements, psychoacoustic metrics are used more and more for the assessment of noise problems. Within the psychoacoustic procedures, some already have become "classic" like e.g. Zwicker's loudness for stationary sounds as described in DIN 45 631 and ISO 532 B or algorithms for sharpness, fluctuation strength, roughness, and so forth. Recently...
متن کاملIn vitro study of anti-suck-back ability by themselves on new high-speed air turbine handpieces.
The anti-suck-back ability of five new high-speed air turbine handpiece models was evaluated in this study. First, suck-back pressure with water displacement within a glass tube was measured. Next, under three different conditions, how many on-off times it takes before fluorescent stains became visible on a piece of gauze at the exhaust vent was counted and the presence of fluorescent stains on...
متن کاملBacteriological evaluation of a new air turbine handpiece for preventing cross-contamination in dental procedures.
An autoclavable air turbine handpiece, Air Flushing Clean System (AFCS) (Osada Electric Co., Ltd., Tokyo, Japan) was developed for use in dentistry with the objective of reducing cross-contamination. Its potential for bacterial contamination was investigated in vitro using two bacterial strains (Streptococcus mutants ATCC 25175 and Staphylococcus aureus FDA 209 P). In theory, this device should...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Proceedings of the Fluids engineering conference
سال: 2019
ISSN: 2424-2896
DOI: 10.1299/jsmefed.2019.is-31