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New aerosol-decreasing dental handpiece functions sufficiently decrease pulp temperature: An in vitro study.

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Electric dental handpieces effectively reduce intrapulpal temperature during tooth preparation. Factors like tooth type, bur material, and suction use influence this temperature decrease, ensuring safety in dental procedures.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Intrapulpal temperature increase during dental procedures can harm pulp vitality.
  • Electric high-speed handpieces are commonly used in restorative dentistry.
  • Optimizing coolant and operational parameters is crucial for minimizing thermal damage.

Purpose of the Study:

  • To evaluate intrapulpal temperature changes with electric handpieces.
  • To compare different coolant functions (Water Jet vs. Water Spray).
  • To assess the impact of coolant port design, suction, bur, and tooth types.

Main Methods:

  • In vitro experimental setup using 44 extracted teeth (anterior and posterior).
  • Recorded real-time intrapulpal temperature and duration during groove cuts.
  • Statistical analysis using ANOVA and post hoc tests to determine temperature changes.

Main Results:

  • Most preparations showed a decreasing trend in intrapulpal temperature.
  • No procedure reached the critical temperature threshold of 42.5°C.
  • No overall increase in intrapulpal temperature was observed within 60-second preparations.

Conclusions:

  • Tested electric handpieces effectively manage intrapulpal temperature.
  • Greater temperature reduction observed with canines vs. premolars, carbide vs. diamond burs, and no suction.
  • Findings suggest specific parameters can optimize thermal management during cavity preparation.