Question

one cement presented in this chapter requires procedural steps before cementing on an indirect restoration that are different from the steps required for the other materials discussed. Which material has this unique characteristic, and why are these intitial steps taken for this cement?

Answer 1

The material which has this unique characteristic is- Dental cements

The Dental cements are a category of dental materials that are routinely used when working with indirect restorations

The initial steps taken for this cement because of the following reasons-

As per American Dental Association (ADA) and the International Standards Organization (ISO) have classified dental cements into three types according to their properties and their intended use in dentistry-

(I) Type I cements are classified as a luting agent.

This type of dental material is designed to act as an adhesive to hold the indirect restoration to the tooth structure.

This group includes both permanent and temporary cements.

(II)Type II cements involves materials which can be used as a restorative material such as intermediate restorative material.

(III)Type III cements includes the liners and bases that are placed within the cavity preparation.

Permanent cements

It is a luting agents which can be used for the long-term cementation of cast restorations such as inlays, crowns, bridges, laminate veneers, and orthodontic fixed appliances.

The types of restorations are seated on a prepared tooth structure, the hollow, shell-like structure of the indirect restoration requires that a luting agent should have qualities that do not interfere with a proper fit.

Temporary cements

The temporary cementation of an indirect restoration may be completed if the dentist needs to remove the indirect restoration at a later date.

If the tooth is sensitive or is exhibiting other symptoms that might require removal of the cast restoration or when temporary cementation of provisional coverage is required while the patient waits until the laboratory technician completes the cast restoration.

The provisional coverage is a temporary coverage that is placed on a tooth to protect the tooth until the permanent restoration is ready to be cemented.

The number of factors can influence actual cementation with a luting cement.

The cementing errors can be the result of improper mixing technique, time, humidity or incorrect temperature of the glass slab.