Dental handpieces

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Dental handpieces

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High-speed handpiece

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To use with bur to cut tooth with decay or other dental anomalies

Example:

Cavity preparation for restoration or crown

To use with bur for adjusting crowns and bridges for final fit

Characteristics image

Handpiece is run by air pressure at a maximum speed of 450,000 rotations per minute.
On high-speed handpiece, bur generates an extreme amount of heat.
Instrument sprays water/air or air on bur for cooling purposes to prevent damage to pulp.
Different styles of securing bur are available:

1. Power lever chuck
2. Push-button chuck
3. Conventional chuck—Need to secure bur and loosen bur in handpiece with wrench

Practice note image

Handpiece attaches to tubing on dental unit.

 

imageHigh-Speed Handpiece must be lubricated according to the manufacturer’s recommendation, cleaned, bagged individually, and then sterilized. A chemical/steam indicator device should be included in the wrapping.

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Photos courtesy KaVo Dental Corp., Charlotte, NC.

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Fiberoptic high-speed handpiece

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To illuminate tooth during preparation for restoration
To provide light intraorally during use of handpiece
To use with bur to cut tooth with decay or other dental anomalies

Example:

Cavity preparation for restoration or crown

To use with bur for adjusting crowns and bridges for final fit

Characteristics image

1. Light(s) at head of handpiece
Lights up working area while handpiece rotates
Same characteristics as high-speed handpiece

Practice notes image

Handpiece attaches to tubing on dental unit.
Tubing has special adaptor for light availability.

 

imageFiberoptic High-Speed Handpiece must be lubricated according to the manufacturer’s recommendation, cleaned, bagged individually, and then sterilized. A chemical/steam indicator device should be included in the wrapping.

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Photos courtesy KaVo Dental Corp., Charlotte, NC.

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Slow-speed motor with straight handpiece attachment

Functions image

To use with slow-speed attachments
To use straight attachment with long-shank straight bur

Characteristics image

1. Slow-Speed Motor
2. Straight Handpiece Attachment (with bur attached)
Maximum speed of 30,000 rotations per minute; used as adjunct to high-speed handpiece
Straight attachment—Usually used outside oral cavity
Contra-angle or prophy angle attachments—Designed for intraoral use
Handpiece must be engaged in either forward or reverse.

Practice note image

Slow-Speed Motor attaches to tubing on dental unit.

 

imageSlow-Speed Motor with Straight Handpiece Attachment must be lubricated according to the manufacturer’s recommendation, cleaned, bagged individually, and then sterilized. A chemical/steam indicator device should be included in the wrapping.

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Left photo courtesy DENTSPLY International, York, PA.

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Slow-speed motor with contra-angle handpiece attachment

Functions image

To use with burs for intraoral and extraoral procedures
To remove decay, polish amalgam restorations, refine cavity preparation, adjust provisional and permanent crowns and bridges, adjust occlusal restorations, adjust partials and dentures

Characteristics image

1. Contra-Angle Attachment
2. Slow Speed Motor
3. Push-button device to secure bur—Using friction grip bur
4. Latch type bur—Top: latch open; bottom: latch closed
Contra-Angle attaches to straight handpiece or to Slow-Speed Motor.
Types of Contra-Angle Attachments:

• Latch type—Latch-type bur, prophylaxis polishing cup or brush. Bur is secured by swivel of latch-type device in back of handpiece.
• Friction grip—Friction grip bur. Bur is secured by pushing back of handpiece.

Practice note image

Slow-Speed Motor attaches to tubing on dental unit.

 

imageSlow-Speed Motor with Contra-Angle Handpiece Attachment must be lubricated according to the manufacturer’s recommendation, cleaned, bagged individually, and then sterilized. A chemical/steam indicator device should be included in the wrapping.

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Pictured: MIDWEST RDH Hygiene Handpiece for Disposable Prophy Angles. Photo courtesy DENTSPLY International, York, PA.

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Feb 3, 2015 | Posted by in Dental Hygiene | Comments Off on Dental handpieces
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