title: Effect of dowel lubrication on resistance to dislodgment of dowels cemented with a 4-META resinous cement.
abstract: Dentatus stainless steel dowels were cemented 5 mm into prepared canals of extracted human teeth with C&B Metabond cement. One half the dowels were lubricated before cementation to ensure easy subsequent retrieval. Significantly less tensile force was required to dislodge the lubricated dowels (p = 0.0209). Retrievable lubricated dowels could provide dentists the option of nonsurgical endodontic retreatment in lieu of endodontic surgery. However, lubrication cannot be recommended for clinical use at this time because of the potential for the dowel to unscrew during normal oral function. Further studies are required to determine the effects of rotational forces on the lubricated dowel, surface design of the dowel on retention, and chemical interaction of the lubricant on the resinous cement. Long-term effects of the lubricant on the cement are unknown.
authors.affiliation: U.S. Army Dental Activity, Fort Hood, Tex., USA.
authors.forename: J O
authors.initials: JO
authors.lastname: Walmann
authors.forename: J C
authors.initials: JC
authors.lastname: Donnelly
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001896:Boron Compounds / Q000737:chemistry; D002484:Cementation; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D008153:Lubrication; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D018915:Root Canal Preparation; D012399:Rotation; D013193:Stainless Steel / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength; D019231:Tooth Preparation, Prosthodontic
chemical_list: D000180:Acrylic Resins; D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D013193:Stainless Steel; C031172:4-META resin; C049495:Super-bond