1. The following chemically bond to the tooth:  A. Composite resin.  B. Dental sealants.  C. Glass ionomer cement. ***  D. All of the above.   2. Compomer restorative materials are:  A. Glass ionomer with polymer components  B. Resin systems with fluoride containing glasses. ***  C. Composite resin for cervical restorations only.   Explanation: The composition of compomers is similar to that of a dental composite however it has been modified, making it a polyacid-modified composite. This results in compomers still requiring a bonding system to bond to tooth tissue.   Although the name compomer implies that the material possesses a combination of characteristics of both composite and glass ionomers, these materials are essentially polymer-based composites that have been slightly modified to take advantages of the potential fluoride-releasing behavior of glass ionomers.   3. Loose enamel rods at the gingival floor of a class II amalgam cavity should be removed using :  A. Straight chisel...
 
 
n b
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