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Dental Extraction Power Equipment - Small Animal (view source)
Revision as of 19:38, 4 June 2016
, 19:38, 4 June 2016no edit summary
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==Micromotor Unit==
==Micromotor Unit==
[[File:Contra-angle hand piece.jpg|right|200px|thumb|Slow speed, contra-angle hand piece with a latch grip attachment.<small>''© Lisa Milella 2013''</small>]]
[[File:Contra-angle hand piece.jpg|right|200px|thumb|Slow speed, contra-angle hand piece with a latch grip attachment.<small>''© Lisa Milella 2013''</small>]]
A micromotor unit is a small electric motor that connects to an e-fitting handpiece. Micromotors can be used for polishing teeth as well as sectioning them. The control box has a forward and reverse switch and a speed control knob. Micromotor units do not generally include water cooling of the bur and an external source (e.g. assistant applying coolant continuously to the tissues) is required to prevent thermal damage. For sectioning [[:Category:Teeth - Anatomy & Physiology|teeth]], the micromotor should be set at maximum speed (30 000 rpm).
A micromotor unit is a small electric motor that connects to an e-fitting handpiece. Micromotors can be used for polishing teeth as well as sectioning them. The control box has a forward and reverse switch and a speed control knob. Micromotor units do not generally include water cooling of the bur and an external source (e.g. assistant applying coolant continuously to the tissues) is required to prevent thermal damage. For sectioning [[:Category:Teeth - Anatomy & Physiology|teeth]], the micromotor should be set at maximum speed (30 000 rpm).
==Burs==
==Burs==
Dental burs are made of a variety of materials and are available in a range of sizes and shapes. For veterinary use only a few patterns and sizes are actually needed.<br><br>
Dental burs are made of a variety of materials and are available in a range of sizes and shapes. For veterinary use only a few patterns and sizes are actually needed.<br><br>
The cutting surface of the bur is made of stainless steel, tungsten-carbide steel or diamond. tungsten carbide and stainless steel types have cutting blades. The fastest bur is a tungsten carbide bur. Diamond burs have a coating of tiny diamonds embedded in resin on the bur shank. As the diamonds are lost, the bur becomes less efficient at cutting.<br><br>
The cutting surface of the bur is made of stainless steel, tungsten-carbide steel or diamond. Tungsten carbide and stainless steel types have cutting blades. The fastest bur is a tungsten carbide bur. Diamond burs have a coating of tiny diamonds embedded in resin on the bur shank. As the diamonds are lost, the bur becomes less efficient at cutting.<br><br>
'''Shapes of burs:'''
'''Shapes of Burs:'''
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The most commonly used shapes in veterinary dentistry are tapered fissure burs and round burs. Fissure burs can be either cylindrical or tapered with cutting surfaces on the side of the bur. Round burs are ball shape and have cutting surfaces around the whole surface of the ball. Other shapes are available and include pear shaped, inverted cones amongst others.
The most commonly used shapes in veterinary dentistry are tapered fissure burs and round burs. Fissure burs can be either cylindrical or tapered with cutting surfaces on the side of the bur. Round burs are ball shape and have cutting surfaces around the whole surface of the ball. Other shapes are available and include pear shaped, inverted cones amongst others.
Burs suitable for use in a high speed handpiece are called friction grip burs (FG). Latch grip (RA) burs are suitable for contra-angle handpieces and burs suitable for straight handpieces are HP burs.
Burs suitable for use in a high speed handpiece are called friction grip burs (FG). Latch grip (RA) burs are suitable for contra-angle handpieces and HP burs are suitable for straight handpieces.
Burs used in high speed handpieces are typically used for sectioning the teeth during [[Exodontics|extraction]], for crown preparation or for [[Endodontic Treatment|endodontic access]] into the tooth.<br>
Latch grip burs are used in slow speed handpieces and are used for bone removal (with coolant) or finer, more controlled cavity preparations.<br>
HP burs are used on a straight nose cone hand piece - the most common bur used for removal of tooth substance for crown height reduction in rabbits, typically a small round or fissure bur or an acrylic trimmer as illustrated.
<center><gallery widths=250px heights=180px mode="traditional">
File:High speed dental drill.jpg|High speed dental drill with a tapered fissure cross cut bur
File:Round burs.jpg|Round burs
File:Round and fissure bur.jpg|Round and fissure bur
File:HP bur.jpg|HP bur
</gallery></center>
{{Learning
|Vetstream = [https://www.vetstream.com/felis/Content/Freeform/fre70023.asp Dental instruments]
}}
{{Lisa Milella written
|date = 13 August 2014}}
{{Waltham}}
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[[Category:Dental Instruments]]
[[Category:Dental Instruments]]
[[Category:To Do - Dentistry questions]]
[[Category:Waltham reviewed]]