FINISHING & POLISHING INSTRUMENTS

By Dr. Vishaal Bhat on Friday 28 January 2011 with 0 comments



Finishing burs:
·         Stainless steel or tungsten carbide burs.
·         12 – 40 fluted carbide burs are recommended for finishing.

Diamond instruments & pastes:    
Diamond is a transparent material composed of carbon. Considered as abrasive because, it is the hardest material known & is capable of abrading almost any other material.
Commercially available as:
·         Bonded abrasive rotary instrument
·         Metal backed abrasive strips
·         Polishing pastes


FINISHING DIAMOND: contains medium fine grit diamond particles (8-40 mm). These should be used with light force &copious water spray- to preserve the v. fine diamond coatings. Diamond abrasives preferably used on Ceramics & Composites.

Brushes:
Brushes can be used either alone or in combination with abrasive particle. Most of the brushes have synthetic bristles. Others may have wire bristles for polishing cast restorations. Various types of brushes are available which are screwed into an extension, inserted into hand piece or attached to a mandrel.
Cloth:
Cloth carried on a metal wheel is used for final polishing with or without a polishing medium.

Felt :
Used to attain lusture for metallic restorations, usually with a polishing agent. Available in different shapes such as wheel, coves & cylinders.

Rotary rubber instruments;
Rubber ended rotary tools used for polishing procedures. Available in various shapes  such as wheel, coves ,cups .Used with other abrasives or polishing pastes
Coated disks & strips:
Abrasive particles such as sand, cuttle, garnet boron carbide, SiC are held to a flexible heavy weight paper or Mylar strips with a suitable adhesive material. Discs are attached to mandrel. Adhesive strips are used by hand in a back & forth motion especially for finishing proximal areas.

Category: Conservative and Endodontics Notes , Conservative Dentistry Notes , Dental Materials Notes , Restorative Dentistry Notes

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