title: The effect of cold treatment on the physical properties of stainless steel and titanium alloy endodontic posts.
abstract: This study determined whether cold treatment at -96 degrees C affected the mechanical properties of various compositions and sizes of the Flexi-Post system. The experiment was divided into four groups of posts. The two control groups were made up of untreated stainless steel (50 posts) and titanium alloy (40 posts). The two remaining cold-treated groups were made up of stainless steel (50 posts) and titanium alloy (40 posts). In each instance the bending or breaking forces were tested on a universal testing machine. Stainless steel Flexi-Post samples showed a significant (p less than 0.05) increase in strength, whereas titanium alloy posts showed no significant increase in strength as a consequence of the cold treatment.
authors.affiliation: Essential Dental Laboratories, South Hackensack, N.J.
authors.forename: B I
authors.initials: BI
authors.lastname: Cohen
authors.forename: A S
authors.initials: AS
authors.lastname: Deutsch
authors.forename: B L
authors.initials: BL
authors.lastname: Musikant
mesh_terms: D000497:Alloys; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003799:Dental Stress Analysis; D004548:Elasticity; D005615:Freezing; D008669:Metallurgy; D011176:Post and Core Technique / Q000295:instrumentation*; D011475:Prosthesis Failure; D012390:Root Canal Therapy / Q000295:instrumentation; D013193:Stainless Steel / Q000737:chemistry*; D013314:Stress, Mechanical; D014025:Titanium / Q000737:chemistry*
chemical_list: D000497:Alloys; D013193:Stainless Steel; C031462:titanium alloy (TiAl6V4); D014025:Titanium