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
2011 SCImago Journal Rankings: 0.030
DC Field
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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
2011 SCImago Journal Rankings: 0.030
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
Author Affiliations
  1. University of Kuwait
  2. The University of Hong Kong