Dental materials for the credit test end the exam The study material is Craig´s restorative dental materials or similar book. For the prosthetic opart you must know: Gypsum products and investments. Impression materials and techniques: Alginates, Elastomeric impression materials , methods of taking impressions, occlusal registration materials, edentulous impression techniques Waxes. Casting and soldering techniques. For restorative part: Amalgam, composites, cements. Root canal filling materials. Bonding agents.