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 الحفار الكهربائي The HandPiece

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كاتب الموضوعرسالة
soulful
طالب مجتهد
طالب مجتهد
soulful


عدد الرسائل : 383
العمر : 35
الأوسمة : الحفار الكهربائي  The HandPiece 9zifnm6ng9
مزاجي : الحفار الكهربائي  The HandPiece 00510
تاريخ التسجيل : 09/06/2008

الحفار الكهربائي  The HandPiece Empty
مُساهمةموضوع: الحفار الكهربائي The HandPiece   الحفار الكهربائي  The HandPiece Emptyالجمعة مارس 27, 2009 5:59 pm




تلبيتا لرغبة الأخ نوح لمعرفة ما هو الحفار الكهرباني Handpiece

نبدا
Handpiece is a rotary instrument and

Rotary instruments complete different functions in the cutting, polishing,
and finishing of tooth structure
and the restoration process

Dental Handpiece

Most frequently used piece of machinery
in dentistry

The handpiece provides the power to a rotary instrument which completes the actual cutting or
polishing of tooth structure
and castings.


Low-Speed Handpiece

Design

Straight in appearance.
Standard length and shorty
Speed ranges from 10,000 to 30,000 rotations per minute rpm
Operates the rotary instrument in either a forward or backward movement.




Example of a low-speed handpiece
الحفار الكهربائي  The HandPiece Njcexpfogl

Uses of the Low-Speed Handpiece

:Clinical

Removal of soft decay and finishing of a cavity preparation.
Finishing and polishing restorations.
Coronal polishing and removal of stains.
Porcelain adjustments
Root canal treatment

Laboratory

Trimming and contouring temporary crowns.
Trimming and relining of removable partials and dentures.
Trimming and contouring of orthodontic appliances.


Low-Speed Attachments


Straight Attachments

Long-shank laboratory bur
Prophy angle attachments

Contra-Angle Attachment

Latch type rotary instruments
Mandrel




Prophylaxis Angle

Used during polishing procedures to hold the prophy cup and bristle brush.
:Two types
•Plastic disposable “prophy” angle
•Metal “prophy” angle





Disposable prophy cup and brush

الحفار الكهربائي  The HandPiece Vazy9g1use





High-Speed Handpiece

:Design

One-piece unit with a slight curve in appearance
Operates from air pressure
Operates at speeds up to 450,000 rpm
Maintains a water-coolant system
Friction-grip locking system for rotary instruments
Fiber-optic lighting




High-speed handpiece


الحفار الكهربائي  The HandPiece Qr5hupvhv7






Uses of the High-Speed Handpiece

Remove decay
Remove old or faulty restoration
Reduce crown portion of the tooth for preparation of a crown or bridge
Prepare outline and retention grooves for a new restoration
Finish or polish restoration
Section a tooth during a surgery





Ultrasonic Handpiece

:Design
Attached to the dental unit.
Powered by electricity.
Primarily used for prophylaxis appointments.
Attachments are similar in appearance to scaling instruments.
Delivers a pulsating spray of water.




Ultrasonic handpiece.
(Courtesy A-dec.)

الحفار الكهربائي  The HandPiece Nh1kljl0c7



Uses of the Ultrasonic Handpiece

Remove calculus
Remove stain
Remove bonding materials from tooth surface after orthodontic appliances are removed
Remove cement after orthodontic bands are removed




Laser Handpiece

:Uses
Cauterizes soft tissue.
Vaporizes decayed tooth structure.
:Advantages
Usually painless.
Patient usually does not require anesthesia.
Proceed with procedure faster.
:Disadvantage
Cannot be used on teeth with existing restorations



Air-Abrasion Handpiece

:Design
Small version of a sandblaster.
Produces a high-pressure delivery of aluminum oxide particles

through a small probe

:Uses
Prepares teeth for sealants.
Removes external stains.
Class I through class VI preparations.
Endodontic access.
Crown margins.
Prepares a tooth surface for the cementation of a cast restoration, such as a crown or veneer




الحفار الكهربائي  The HandPiece G619a8aln6





Laboratory Handpiece

:Design
Operates at speeds up to 20,000 rpm.
Uses laboratory burs.
Provides greater torque than handpieces used intraorally.




الحفار الكهربائي  The HandPiece Aysn5d8iyi



هذا هو الحفار الكهربائي بأختصار شديد أرجو أن أكون أوضحت لك أخ نوح
ونحن في الخدمة لأي سوال أخ نوح منور المنتدي وقسم الأسنان


thanks







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الحفار الكهربائي The HandPiece
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