E-Type Low Speed Handpieces

• Multi-piece handpieces consisting of a motor and various attachments (the motor cannot be used without an attachment).
   
• E-Type is an international standard for how attachments are placed on a motor; most E-Type motors and attachments are interchangeable, like KaVo, NSK, W&H, and Bien Air. However, Midwest and Star brands have proprietary designs.
• 2 primary types of attachments:

 

Nose Cone/Straight Attachment

• Can accept straight handpiece burs, mandrels, prophy angles, and doriot/U-Type contra angles.
• Come either as a 1:1 transmission, which maintains the motor speed, or as a 4:1 gear reduction, primarily used with prophies to reduce the handpiece speed to a rate that reduces the splatter of paste and the potential to burn a patient.
   

 

Contra Angle

• Generally accepts either a bur or a prophy cup.
• Has 2 components: a sheath and a head.
• Sheath attaches to the E-Motor and can have gear reduction characteristics.
• Head comes in a wide range of options and has the mechanism to hold a bur or prophy cup.
• Head screws onto the sheath and can easily be exchanged for other options.
   

 

 

 

Doriot Low Speed Handpieces

 

Doriot Low Speed Handpieces

• One-piece slow speed handpieces consisting of a motor combined with a nose cone-type front end.
• Does not require an additional attachment to perform certain procedures since it can generally accept a straight handpiece bur, mandrel, prophy angle, and doriot/U-type contra angles.
   
   

 

 

 

Hygienist Handpieces

• A special kind of doriot handpiece, designed just form prophyalxis with a compact, light design and a swivel nose.
• Has an internal gear reduction and operates at 5,000 RPM.
• Many hygiene handpieces have special friction grip-type chucking mechanisms that will only accept disposable prophy angles.

 

 

Advantages of Doriot-type Handpieces

• Shorter than E-Type motor/nose cone combinations.
• Can duplicate any E-Type/attachment combination without additional attachments required.

 

 

Disadvantages of Doriot-type Handpieces

• When used with doriot/U-Type contra angles, the handpiece can get very long, making it awkward for the dentist.
   

 

 

Matching Bur Types with Handpieces

• For use in straight attachments/nose cones and Doriot-type low speed handpieces.
• For use in latch-type contra angle heads in low speed handpieces.
   
• For use in high speed handpieces and friction grip low speed contra angle heads.