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Article: Flow and free running speed characterization of dental air turbine handpieces

TitleFlow and free running speed characterization of dental air turbine handpieces
Authors
KeywordsAir flow
Dental air turbine handpiece
Performance
Speed
Issue Date1999
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdent
Citation
Journal Of Dentistry, 1999, v. 27 n. 7, p. 465-477 How to Cite?
AbstractObjectives: Dental air turbine handpieces have been widely used in clinical dentistry for over 30 years, yet little work has been reported on their performance. A few studies have been concerned with measurement of speed (i.e. rotation rate), torque and power performance of these devices, but neither investigations of functional relationships between controlling variables nor theory dealing specifically with this class of turbine have been reported. This has hindered the development of satisfactory methods of handpiece specification and of testing dental rotary cutting tools. It was the intention of the present work to remedy that deficiency. Methods: Measurements of pressure, temperature, gas flow rate and rotation rate were made with improved accuracy and precision for 14 ball bearing turbine handpieces on several gases. Functional relationships between gas properties, supply pressure, flow rate, turbine design factors and free running speed were identified and equations describing these aspects of behaviour of this class of turbine developed. Results: The rotor radius, through peripheral Mach number, was found to be a major determinant of speed performance. In addition, gas flow was found to be an important limiting factor through the effect of choke. Conclusions: Each dental handpiece can be treated as a simple orifice of a characteristic cross-sectional area. Free running speed can be explained in terms of gas properties and pressure, with allowance for a design-specific performance coefficient. © 1999 Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/66750
ISSN
2015 Impact Factor: 3.109
2015 SCImago Journal Rankings: 1.029
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorDyson, JEen_HK
dc.contributor.authorDarvell, BWen_HK
dc.date.accessioned2010-09-06T05:49:01Z-
dc.date.available2010-09-06T05:49:01Z-
dc.date.issued1999en_HK
dc.identifier.citationJournal Of Dentistry, 1999, v. 27 n. 7, p. 465-477en_HK
dc.identifier.issn0300-5712en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66750-
dc.description.abstractObjectives: Dental air turbine handpieces have been widely used in clinical dentistry for over 30 years, yet little work has been reported on their performance. A few studies have been concerned with measurement of speed (i.e. rotation rate), torque and power performance of these devices, but neither investigations of functional relationships between controlling variables nor theory dealing specifically with this class of turbine have been reported. This has hindered the development of satisfactory methods of handpiece specification and of testing dental rotary cutting tools. It was the intention of the present work to remedy that deficiency. Methods: Measurements of pressure, temperature, gas flow rate and rotation rate were made with improved accuracy and precision for 14 ball bearing turbine handpieces on several gases. Functional relationships between gas properties, supply pressure, flow rate, turbine design factors and free running speed were identified and equations describing these aspects of behaviour of this class of turbine developed. Results: The rotor radius, through peripheral Mach number, was found to be a major determinant of speed performance. In addition, gas flow was found to be an important limiting factor through the effect of choke. Conclusions: Each dental handpiece can be treated as a simple orifice of a characteristic cross-sectional area. Free running speed can be explained in terms of gas properties and pressure, with allowance for a design-specific performance coefficient. © 1999 Elsevier Science Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdenten_HK
dc.relation.ispartofJournal of Dentistryen_HK
dc.rightsJournal of Dentistry. Copyright © Elsevier Ltd.en_HK
dc.subjectAir flowen_HK
dc.subjectDental air turbine handpieceen_HK
dc.subjectPerformanceen_HK
dc.subjectSpeeden_HK
dc.subject.meshAiren_HK
dc.subject.meshAlgorithmsen_HK
dc.subject.meshArgonen_HK
dc.subject.meshCarbon Dioxideen_HK
dc.subject.meshDental High-Speed Equipment - classification - standardsen_HK
dc.subject.meshEquipment Designen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshMechanicsen_HK
dc.subject.meshMethaneen_HK
dc.subject.meshPressureen_HK
dc.subject.meshRheologyen_HK
dc.subject.meshSurface Propertiesen_HK
dc.subject.meshTemperatureen_HK
dc.subject.meshTorqueen_HK
dc.titleFlow and free running speed characterization of dental air turbine handpiecesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0300-5712&volume=27&spage=465&epage=477&date=1999&atitle=Flow+and+free+running+speed+characterization+of+dental+air+turbine+handpiecesen_HK
dc.identifier.emailDyson, JE: jdyson@hkucc.hku.hken_HK
dc.identifier.emailDarvell, BW: b.w.darvell@hku.hken_HK
dc.identifier.authorityDyson, JE=rp00003en_HK
dc.identifier.authorityDarvell, BW=rp00007en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0300-5712(99)00037-8en_HK
dc.identifier.pmid10507202-
dc.identifier.scopuseid_2-s2.0-0033191254en_HK
dc.identifier.hkuros49344en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033191254&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume27en_HK
dc.identifier.issue7en_HK
dc.identifier.spage465en_HK
dc.identifier.epage477en_HK
dc.identifier.isiWOS:000082369600001-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridDyson, JE=23089868600en_HK
dc.identifier.scopusauthoridDarvell, BW=7005953926en_HK

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