These tooth-shaded acrylic resins are used in fixed prosthodontics to make temporary and permanent restorations. The self-curing type is used as an interim restoration while the permanent one is being fabricated. This resin is normally used with a vacuum or pressure-formed matrix to sculpt the contours of the interim crown or bridge.
Self-curing orthodontic resin is used to fabricate nightguards and orthodontic retainers. It is normally supplied in the clear and pink types and can be used with several tinted liquids to produce different shades.
These resins are used to fabricate interim RPDs and to repair any acrylic prosthesis. They are normally only stocked by the dental clinic in self-curing pink and light-pink fibered shades. oral tissues, head, and neck. Custom fluoride trays also are made out of this material for prescribed home treatment with fluoride gels.
Self-curing tray acrylic is used to make customized impression trays. Tray acrylic is usually light blue or white in color. You can lengthen the working time of this material by submersing the dough in cold water before it is ready to use.
Along with the prosthodontic materials previously explained in the above categories, you need to become familar with other miscellaneous materials such as alcohols, mouthguard materials, separating media, tray adhesive, and treatment liners.
Isopropyl, methanol, and denatured ethanol are examples of fuels used in an alcohol torch for softening plastic or melting wax. Of the three, denatured ethanol is preferred since it is safer to use and burns cleaner.
Mouthguards are made from polyvinyl materials. This thermoplastic resin is molded over a cast by means of a vacuum-forming machine. The use of mouth protectors in sports is to reduce injuries to the
Separating media prevents one material from bonding to another material. The medium coats the cast and seals off the pores so acrylic resins can now be fabricated on a dental cast and removed.
One type of separating media is tinfoil substitute that when used, forms a film on the cast. To use, paint it on the cast with a soft bristle brush. The film is fragile and can easily be scuffed off. If this occurs, remove the entire film and repaint. Place the acrylic resin to the cast within 1 hour of painting the film on the cast to avoid deterioration. Do not allow gypsum particles to contaminate the bottle of tinfoil substitute when applying to a cast. Many other commercially prepared separators are available to prevent bonding.
Custom impression trays are coated with this adhesive before they are filled with rubber impression material. This ensures that the impression material stays in the tray when it is removed from the mouth. Tray adhesive in spray form is also available for use with alginate impression materials and stock impression trays.
Treatment liners, also know as tissue conditioners, allow oral tisses to recover, improving tone and health, before making a new denture or reling an existing one. The dentist changes the tissue conditioner at 3- to 4-day intervals since liners stiffen rapidly.
The prosthodontic equipment that you will use will be located in the dental laboratory and the prosthodontic DTR. Only the basic equipment is mentioned. Never operate or use any type of equipment without first reading the manufacturer's instructions on use, safety precautions, and maintenance. Continue Reading