title: Ultrasonic removal of dentine pins.
abstract: Replacement of pin-retained amalgam restorations is complicated by the loss of prime pin sites and remaining pin sites posing anatomical problems. Self-threading dentine pins can be removed with an ultrasonic handpiece, and the pin site reused with a large pin. Retention of replacement pins is similar to original pins. Pin removal after experimental placement takes a considerable time (< 15 min), but pin removal from extracted pin-restored teeth is much quicker (mean of 45 s). The reuse of primary pin sites allows uncomplicated replacement of pin-retained amalgams, and is a useful clinical technique.
authors.affiliation: School of Dental Science, University of Melbourne, Vic, Australia.
authors.forename: P R
authors.initials: PR
authors.lastname: Wilson
authors.forename: H M
authors.initials: HM
authors.lastname: Bione
mesh_terms: D000704:Analysis of Variance; D003723:Dental Amalgam; D003772:Dental Pins; D017269:Dental Prosthesis Repair / Q000379:methods*; D017268:Dental Prosthesis Retention / Q000295:instrumentation; D003804:Dentin; D017743:Equipment Reuse; D006801:Humans; D014465:Ultrasonics
chemical_list: D003723:Dental Amalgam