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Related Experiment Videos

Water flow in high-speed handpieces.

Bruno Neves Cavalcanti1, Paulo Isaías Serairdarian, Sigmar Mello Rode

  • 1School of Dentistry, Ibirapuera University São Paulo, São Paulo, Brazil. bncavalcanti@uol.com.br

Quintessence International (Berlin, Germany : 1985)
|May 17, 2005
PubMed
Summary

High-speed handpieces with one cooling aperture deliver more water to the bur than those with multiple apertures. This finding is crucial for understanding water flow and temperature control during dental procedures.

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Area of Science:

  • Dental materials and technology
  • Biomedical engineering

Background:

  • High-speed handpieces are essential in modern dentistry.
  • Effective cooling is critical to prevent thermal damage during dental procedures.

Purpose of the Study:

  • To measure water flow in high-speed handpieces.
  • To evaluate the impact of water flow on temperature generation.
  • To compare water flow across turbines with varying numbers of cooling apertures.

Main Methods:

  • Water flow was measured from 137 high-speed handpiece samples.
  • Samples were collected at customary and maximum flow rates.
  • Flow rates were calculated in mL/min after 15 seconds of turbine operation.

Main Results:

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  • Average water flow was 29.48 mL/min.
  • Flow rates varied by the number of coolant apertures: 42.38 mL/min (one), 34.31 mL/min (two), and 30.44 mL/min (three).
  • Significant statistical differences were found between one and three coolant apertures (P < .05).

Conclusions:

  • Turbine handpieces with a single cooling aperture provide greater water flow to the bur.
  • This suggests a potential difference in cooling efficiency based on handpiece design.