Finishing, Polishing, and Cleaning Materials

Types of home denture cleaner

1. Abrasive creams: dentu-creme 2. Alkaline hypochlorites: clorox 3. Alkaline perborates: efferdent 4. Dilute acids: polident 5. Enzymes: Rembrandt daily cleaner

Requirements for an ideal denture cleaner

1. Nontoxic 2. Be able to dissolve organic and inorganic deposits. 3. Be harmless to the materials it's made of 4. Not be caustic 5. Be stable during storage 6. Bactericidal/fungicidal

Composition of prophy paste

Abrasives in prophy pastes Perlite: a volcanic glass whose particles wear and become smaller but continue to abrade to an increasingly smoother tooth surface pumice prophy pastes tend to be the most abrasive. Silicate is better Dentin abrasion has been measured at 5 to 6 times that of enamel with any product

Finishing Abrasives

Coarse hard particles used for developing contours of a restoration. Can be applied by a tool or in a "slurry" Agents commonly used for finishing Aluminum oxide: particles applied to paper or plastic disks or used as powders in air abrasion units Cuttle is manufactured from fish bone (no longer used) just a trade name for quartz on a disk. (beige) Diamond: chips embedded on a disk to polish resins. (black) Garnet: powder or disks, (red) Silicon carbide: second hardest abrasive, on disks, black as well Rouge: a fine red powder used to polish gold or other precious metal alloys tin oxide: a white powder mixed to form a slurry usually

Cleansing Abrasives

Even softer and are used to remove softer materials that adhere to enamel or restorative materials

Polishing Abrasives

Finer particles used to smooth surfaces roughened by the finishing abrasives

Types of abrasives

Finishing abrasives Polishing abrasives Cleansing abrasives

Purpose of FPC

Meant to remove excess material Smooth roughened surfaces Cleaning techniques are meant to remove food and debris from a surface without damaging it. Materials used for each are primarily abrasives

Prophylactic Pastes

Polishing should proceed the application of fl2. It is used to polish and remove all type of accumulation from the tooth without damaging the tooth.

Dentrifices

Primary function is to clean and polish Past and powder forms Exposed cementum, dentin and polymeric restorative materials are susceptible to abrasion

Denture Cleaners

Professional repolishing soaking/brushing daily

Abrasion Rate

Rate: is determined by 1. The size of the abrasive particle (the larger, the deeper the scratches) 2. The pressure of the abrasive on the material (the more the pressure, the less control you have over it.) 3. The speed the abrasive is being moved over the surface. (the faster, the more abrasive)

Abrasion

This is a wear process It results when a hard, rough surface plows grooves into a softer material removing some of that softer material. It is a cutting action. The process of abrasion is affected by the physical and mechanical properties of the material being abraded.

Cleaning a Denture base

This is usually done with a rag wheel and a pumice slurry