title: The effect of post adaptation in the root canal on retention of posts cemented with various cements.
abstract: This laboratory study compared the retention of prefabricated posts in well-fitting and loose-fitting post canals using different cement materials. Eighty-three human teeth were prepared for post placement. One of zinc phosphate cement, polycarboxylate cement, glass ionomer cement or resin cement was used to cement each post in place. A tensile force was applied to remove each post and the separation force was recorded. Posts cemented with the resin cement were the most difficult to dislodge. Posts cemented into loose-fitting canals exhibited greater resistance to dislodgment than posts cemented into well-fitting canals irrespective of the type of cements used.
authors.affiliation: Royal Dental Hospital of Melbourne.
authors.forename: F W
authors.initials: FW
authors.lastname: Chan
authors.forename: J K
authors.initials: JK
authors.lastname: Harcourt
authors.forename: P J
authors.initials: PJ
authors.lastname: Brockhurst
mesh_terms: D003738:Dental Cements / Q000737:chemistry*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D003799:Dental Stress Analysis; D003779:Denture Design; D003781:Denture Retention; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D011076:Polycarboxylate Cement / Q000737:chemistry; D011176:Post and Core Technique; D012117:Resins, Synthetic / Q000737:chemistry; D012390:Root Canal Therapy; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D012117:Resins, Synthetic; D013193:Stainless Steel; D015036:Zinc Phosphate Cement