Dental Cement Dr. Hicham Nuaimi BDS. PGDip Implantology PGDip Restorative Dentistry Mclin in Operative and Esthetic Dentistry

Properties of Material ADA has teamed up to classify dental cements according to: Properties of Material Uses of Material

Classification of Cements Restorative Liner and base Luting agents

Every cement must be assessed for its biocompatibility safety effectiveness. has suitable physical properties for its intended use

3 main Categories 2014

Zinc-oxide Eugenol Zinc phosphate Polycarboxylate Glass ionomer

sets in contact with water Powder and Liquid ZnOE 2 paste system E free With E sets in contact with water Single paste

ZNO E mixes on glass slab with spatula ratio (4 :1) Thin mix for temp. cementation Thick mix for temp. filling

Characteristic Bacteriostatic Low thermal diffusivity Water soluble High sealing ability Weak cement Opaque

Indications Temporary cementation Temporary filling Indirect pulp capping Endodontic sealer Surgical pack

Light-cured Ca(OH)2 paste – resin matrix 2 paste Calcium hydroxide+ di-salicylate

not adhere to the tooth structure pulpal stem cells not adhere to the tooth structure Opaque soluble Bacteriostatic Weak cement

Direct & indirect pulp capping Cavity liner Temporary cementation Applications Endodontic sealer Direct & indirect pulp capping Cavity liner Temporary cementation

Phosphoric acid Zn

cavity base /temp. filling Zn phosphate mixes on glass slab with spatula liquid add in small increments Thin mix for cementation Thick mix cavity base /temp. filling

Characteristic Stronger than ZOE and weaker than GI Dycal requires before Zn Phosphate Mechanical retained thin mix dissolves more than the thick mix

Application Orthodontic band Base Temporary filling Dentine build up

ZINC POLYCARBOXYLATE CEMENT Zn and Poly-acrylic acid Freeze dried acid is blended with the powder

Characteristic insulate thermal and electrical irritations Its strength is comparable to that of zinc phosphate cement Chemically adhere Ca(OH)2 liner is needed in deep cavities More soluble in water than zinc phosphate cement

Application Orthodontic band Base Temporary filling Dentine build up

GIC Luting Final restoration Base and liner Fissure sealant Ortho band Core build up

Thank you. 2014