New and revised American Standards for Dental Materials

New and revised American Standards for Dental Materials

iNlew and Revised American Standards for Dental Materials Council on Dental Research Recognizing the im portance of the A m erican Standards A ssoci...

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iNlew and Revised American Standards for Dental Materials

Council on Dental Research

Recognizing the im portance of the A m erican Standards A ssociation as the clearinghouse for standards o n a national and international level, the Council on D ental R esearch subm itted the A m erican D ental A ssociation specifications for dental m aterials to the A m erican Standards A sso­ ciation for approval as A m erican Standard speci­ fications. T he A m erican D ental A ssociation was m ade proprietary sponsor fo r subsequent revisions of the specifications accepted by the A m erican Standards A ssociation. T he following includes revisions in A m erican Standard specifications ap­ proved on A pril 5, 1965.

Z93.11-1965 (ADA 11-1963) Dental Hydrocolloidal Impression Material— Agar Type, Specification for, (ADA 11-1963)............................................................... Specification for dental impression material in gel form containing a reversible agar hydrocolloid as the gel-forming ingredient. Revision of ADA 11-1941, ASA Z93.11-1962. Z93.12-1965 Denture Base Polymer, Specification for, (ADA 12-1964)...................................................... Specification for denture base polymer of any of the following types: (1) poly (acrylic acid esters), (2) poly (substituted acrylic acid esters), (3) poly (vinyl esters), (4) polystyrene, or (5) copolymers, or mixtures of the foregoing polymers. Revision of ADA 12-1953, ASA Z93.12-1962. Z93.14a-1965 (ADA 14-1963) Addendum to Dental Chromium-Cobalt Casting Alloy, Specification for, Z93.14-1962 (ADA 14-1956). ................................... Requirement for marking the type of material on packages and labels of dental materials. Z93.15a-1965 (ADA 15-1963) Addendum to Acrylic Resin Teeth, Specification for, Z93.15-1962 (ADA 15-1956)............................................................................. Modification of testing procedure for determining Knoop hardness.

Z93.2a-1965 (ADA 2-1963) Addendum to Casting Investment for Dental Gold Alloy, Specification for, Z93.2-1962 (ADA 2-1961............................................. Requirement for marking the type of material on packages and labels of dental materials and illus­ trations of MOD Die.

Z93.16a-1965 (ADA 16-1963) Addenda to Dental Impression Paste— Zinc Oxide-Eugenol Type, Speci­ fication for, Z93.16-1962, ADA 16-1961)................. Requirement for marking the type of material on packages and labels of dental materials and the eugenol content of the eugenol paste.

Z93.3a-1965 (ADA 3-1963) Addendum to Dental Impression Compound Specification for, Z93.3-1962 (ADA 3-1955)................................................................. Requirement for marking the type of material on packages and labels of dental materials.

Z93.17a-1965 (ADA 17-1963) Addenda to Denture Base Temporary Relining Resin, Specification for, Z93.17-1962 (ADA 17-1961)...................................... Changes in testing procedures for determining Knoop hardness. Specifies the time at which the specimen is placed in the controlled atmosphere.

Z93.5a-1965 (ADA 5-1963) Addendum to Dental Casting Gold Alloy, Specification for, Z93.5-1962 (ADA 5-1961)................................................................. Requirement for marking the type of material on packages and labels of dental materials. Z93.7a-1965 (ADA 7-1963) Addendum to Dental Wrought Gold Wire Alloy, Specification for, Z93.71962 (ADA 7-1962)...................................................... Requirement for marking the type of material on packages and labels of dental materials. 1172

■ JA D A , Vol. 72, M ay 1966

Z93.18-1965 Dental Hydrocolloidal Impression M a­ terial—Alginate Type, Specification for, (ADA 181964).................................................................................. Specification for dental impression material in powder form containing an alginate as the gel-forming in­ gredient. Copies of new and revised A m erican Standards are available through the A m erican Standards A s­ sociation, 10 E ast 40th Street, New Y ork, 10016.