title: Retentive characteristics of overdenture attachments during repeated dislodging and cyclic loading.
abstract: The retentive and morphologic changes of overdenture attachments were evaluated independently after repeated insertion and sinusoidal loading on implant abutments. Stud and magnetic attachments were embedded in overdenture housing (n = 5). The overdentures were subjected to either repeated insertion and removal for 5,400 cycles or sinusoidal cyclic loading for 100,000 cycles. A 67.8% decrease in retentive force was observed after 100,000 loading cycles (P < .05), and a 73.9% decrease of retentive force occurred after 5,400 insertion-removal cycles (P < .05). Stud attachments showed more loss of retention and physical deterioration than magnetic attachments tested under identical conditions.
authors.affiliation: Department of Restorative Dentistry, University of Washington, Seattle, WA, USA. akchung@u.washington.edu
authors.forename: Kwok-Hung
authors.initials: KH
authors.lastname: Chung
authors.forename: Dean
authors.initials: D
authors.lastname: Whiting
authors.forename: Mats
authors.initials: M
authors.lastname: Kronstrom
authors.forename: Daniel
authors.initials: D
authors.lastname: Chan
authors.forename: John
authors.initials: J
authors.lastname: Wataha
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000044:Dental Abutments; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis / Q000295:instrumentation; D003819:Denture Bases; D003779:Denture Design; D003781:Denture Retention; D003828:Denture, Overlay; D006801:Humans; D008280:Magnetics / Q000295:instrumentation; D008422:Materials Testing; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D015921:Dental Implants; D003764:Dental Materials; C060386:Triad resin