margin, improving the esthetics of the restoration. In addition, less marginal leakage is likely to occur because of the improved union of the enamel and restoration.
To finish the restoration, the matrix is removed and any rough areas are smoothed with composite-type finishing burs. If the restoration involves proximal surfaces, abrasive strips similar to those shown in figure 4-41 are used to smooth these surfaces. If applicable, the gingival margin of the restoration is checked to remove any excess composite material. The surface of the restoration is smoothed further with a fine and an extra-fine disc of silicon carbide and zirconium silicate. These smooth surfaces prevent retention of food debris or plaque. If a higher gloss of the facial surface is desired, a coating of sealant material is placed over the finished restoration. After completion of the restoration, the rubber dam is removed and oral cavity irrigated and aspirated. If necessary, the dentist checks the occlusion and makes adjustments.
GLASS IONOMER RESTORATIONS. - Usually, the gingival areas on the facial aspect of the maxillary anterior teeth are restored with one of the tooth-colored restorative materials for an esthetic appearance. Restorations located on the gingival third of the tooth may be necessary because the tooth is carious or because it has been worn away or abraded by incorrect brushing habits. Since glass ionomer cements bond directly with enamel, dentin, and cementum, they may be used for such restorations where minimal preparation of the tooth is desired, or where the fluoride release from the cement is desired to resist recurrence of caries. During placement of the glass ionomer cement restoration, the cavity area must be kept totally dry because moisture will cause a failure of the restoration.
A competent dental assistant can increase the efficiency, productivity, and reduce the operational
Figure 4-41 .- Using an abrasive strip to finish a proximal surface.
costs in a DTR by using proper supply procedures. It costs time and money to run out of necessary items. It is also wasteful and expensive to order and store items that are never used.
You will use a supply catalog to order supplies. Some facilities make up a catalog for local use, listing frequently ordered items.
To order an item, look it up in the catalog and then fill out the appropriate "request for issue" form. These forms may vary slightly in format but they all require the same basic information. It is important that you fill out the form accurately and completely. It is important to know item nomenclature, identification, and distribution data.
When your supplies arrive, check the items against your order form to ensure you receive the items and quantities that you ordered. Also check broken seals or loose parts. If you discover anything out of the ordinary, notify your supervisor. After supplies have been checked, store them in a manner consistent with the manufacturer's instructions to prevent spoilage or damage.Continue Reading