| Comparison of rotational speeds and torque properties between air-bearing and ball-bearing air-turbine handpieces. | |
| | |
MedLine Citation:
|
PMID: 2700689 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
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 adjusted to provide some varieties of speeds, ranging from about 150,000 to 320,000 rpm. Subsequently, to compare torque properties and cutting effectiveness between these two handpieces, weight-load cutting tests were conducted, using a glass-ceramic workpiece and a commercial diamond point. It was confirmed that the air-bearing handpiece had the lower torque power but exhibited better cutting effectiveness, compared with its counterpart. |
| | |
Authors:
|
M Taira; K Wakasa; M Yamaki; A Matsui |
Related Documents
:
|
11746889 - Electrospray ionization with ambient pressure ion mobility separation and mass analysis... 18348549 - Evaporation rates and vapor pressures of the even-numbered c8-c18 monocarboxylic acids. 8970079 - Utility of nmr t2 distributions, connection with capillary pressure, clay effect, and d... 23088229 - The burden of disclosure: increased compliance with distrusted advice. 23682499 - The integrity full replacement alternating mattress. 12909049 - On air entrainment in coatings. 8517189 - Cerebrospinal fluid circulation and associated intracranial dynamics. a radiologic inve... 23164929 - Measurement of systemic oxygen delivery and inotropy in healthy term neonates with the ... 21388299 - Biomechanical analysis of the effect of intracranial pressure on the orbital distances ... |
Publication Detail:
|
Type: Comparative Study; Journal Article |
Journal Detail:
|
Title: Dental materials journal Volume: 8 ISSN: 0287-4547 ISO Abbreviation: Dent Mater J Publication Date: 1989 Jun |
Date Detail:
|
Created Date: 1990-08-16 Completed Date: 1990-08-16 Revised Date: 2007-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 8309299 Medline TA: Dent Mater J Country: JAPAN |
Other Details:
|
Languages: eng Pagination: 26-34 Citation Subset: D |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Air Pressure Dental High-Speed Equipment* Evaluation Studies as Topic |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The adhesion mechanism of dental adhesive resin to the alloy. Adhesive ability of dental adhesive re...
Next Document: Analysis of abutment tooth movement utilizing mandibular kinesiography (MKG). Part 2. Effects of cla...