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Article: Coolant effectiveness in dental cutting with air-turbine handpieces.
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TitleCoolant effectiveness in dental cutting with air-turbine handpieces.
 
AuthorsLeung, BT
Dyson, JE2
Darvell, BW1
 
Issue Date2012
 
CitationThe New Zealand Dental Journal, 2012, v. 108 n. 1, p. 25-29 [How to Cite?]
 
AbstractTo establish a strategy for evaluating coolant effectiveness and to compare typical cooling conditions used in dental cutting. A test system comprising a resistive heat source and an array of four type K thermocouples was used to compare the cooling effectiveness of air alone, water stream alone, and an air-water spray, as delivered by representative air-turbine handpieces. Mean temperature change at the four sites was recorded for a range of water flow rates in the range 10 to 90 mL min(-1), with and without air, and with and without the turbine running. The thermal resistance of the system, R, was calculated as the temperature change per watt (KW(-1)). For wet cooling (water stream and air-water spray), R was 5.1 to 11.5 KW(-1), whereas for air coolant alone the range was 18.5 to 30.7 KW(-1). R for air-water spray was lower than for water stream cooling at the same flow rate. The thermal resistivity approach is a viable means of comparative testing of cooling efficacy in simulated dental cutting. It may provide a reliable means of testing handpiece nozzle design, thus enabling the development of more efficient cooling.
 
ISSN0028-8047
2013 SCImago Journal Rankings: 0.143
 
DC FieldValue
dc.contributor.authorLeung, BT
 
dc.contributor.authorDyson, JE
 
dc.contributor.authorDarvell, BW
 
dc.date.accessioned2012-08-08T08:27:08Z
 
dc.date.available2012-08-08T08:27:08Z
 
dc.date.issued2012
 
dc.description.abstractTo establish a strategy for evaluating coolant effectiveness and to compare typical cooling conditions used in dental cutting. A test system comprising a resistive heat source and an array of four type K thermocouples was used to compare the cooling effectiveness of air alone, water stream alone, and an air-water spray, as delivered by representative air-turbine handpieces. Mean temperature change at the four sites was recorded for a range of water flow rates in the range 10 to 90 mL min(-1), with and without air, and with and without the turbine running. The thermal resistance of the system, R, was calculated as the temperature change per watt (KW(-1)). For wet cooling (water stream and air-water spray), R was 5.1 to 11.5 KW(-1), whereas for air coolant alone the range was 18.5 to 30.7 KW(-1). R for air-water spray was lower than for water stream cooling at the same flow rate. The thermal resistivity approach is a viable means of comparative testing of cooling efficacy in simulated dental cutting. It may provide a reliable means of testing handpiece nozzle design, thus enabling the development of more efficient cooling.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationThe New Zealand Dental Journal, 2012, v. 108 n. 1, p. 25-29 [How to Cite?]
 
dc.identifier.epage29
 
dc.identifier.issn0028-8047
2013 SCImago Journal Rankings: 0.143
 
dc.identifier.issue1
 
dc.identifier.pmid22439318
 
dc.identifier.scopuseid_2-s2.0-84860807004
 
dc.identifier.spage25
 
dc.identifier.urihttp://hdl.handle.net/10722/154724
 
dc.identifier.volume108
 
dc.languageeng
 
dc.publisher.placeNew Zealand
 
dc.relation.ispartofThe New Zealand dental journal
 
dc.subject.meshAir
 
dc.subject.meshCold Temperature
 
dc.subject.meshDental High-Speed Equipment - Standards
 
dc.subject.meshDiamond - Chemistry
 
dc.subject.meshEquipment Design
 
dc.subject.meshFlowmeters
 
dc.subject.meshHumans
 
dc.subject.meshHydrodynamics
 
dc.subject.meshRheology - Instrumentation
 
dc.subject.meshTemperature
 
dc.subject.meshThermal Conductivity
 
dc.subject.meshWater - Chemistry
 
dc.titleCoolant effectiveness in dental cutting with air-turbine handpieces.
 
dc.typeArticle
 
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<item><contributor.author>Leung, BT</contributor.author>
<contributor.author>Dyson, JE</contributor.author>
<contributor.author>Darvell, BW</contributor.author>
<date.accessioned>2012-08-08T08:27:08Z</date.accessioned>
<date.available>2012-08-08T08:27:08Z</date.available>
<date.issued>2012</date.issued>
<identifier.citation>The New Zealand Dental Journal, 2012, v. 108 n. 1, p. 25-29</identifier.citation>
<identifier.issn>0028-8047</identifier.issn>
<identifier.uri>http://hdl.handle.net/10722/154724</identifier.uri>
<description.abstract>To establish a strategy for evaluating coolant effectiveness and to compare typical cooling conditions used in dental cutting. A test system comprising a resistive heat source and an array of four type K thermocouples was used to compare the cooling effectiveness of air alone, water stream alone, and an air-water spray, as delivered by representative air-turbine handpieces. Mean temperature change at the four sites was recorded for a range of water flow rates in the range 10 to 90 mL min(-1), with and without air, and with and without the turbine running. The thermal resistance of the system, R, was calculated as the temperature change per watt (KW(-1)). For wet cooling (water stream and air-water spray), R was 5.1 to 11.5 KW(-1), whereas for air coolant alone the range was 18.5 to 30.7 KW(-1). R for air-water spray was lower than for water stream cooling at the same flow rate. The thermal resistivity approach is a viable means of comparative testing of cooling efficacy in simulated dental cutting. It may provide a reliable means of testing handpiece nozzle design, thus enabling the development of more efficient cooling.</description.abstract>
<language>eng</language>
<relation.ispartof>The New Zealand dental journal</relation.ispartof>
<subject.mesh>Air</subject.mesh>
<subject.mesh>Cold Temperature</subject.mesh>
<subject.mesh>Dental High-Speed Equipment - Standards</subject.mesh>
<subject.mesh>Diamond - Chemistry</subject.mesh>
<subject.mesh>Equipment Design</subject.mesh>
<subject.mesh>Flowmeters</subject.mesh>
<subject.mesh>Humans</subject.mesh>
<subject.mesh>Hydrodynamics</subject.mesh>
<subject.mesh>Rheology - Instrumentation</subject.mesh>
<subject.mesh>Temperature</subject.mesh>
<subject.mesh>Thermal Conductivity</subject.mesh>
<subject.mesh>Water - Chemistry</subject.mesh>
<title>Coolant effectiveness in dental cutting with air-turbine handpieces.</title>
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Author Affiliations
  1. University of Kuwait
  2. The University of Hong Kong