title: Development of a self-adjusting magnetic attachment for implant overdentures.
abstract: This study aimed to clarify the efficacy of a newly developed self-adjusting magnetic attachment (SMAT) that allowed 0.4 mm of vertical and 8 degrees of rotational movements using an in vitro model. Comparison between the SMAT and a conventional magnetic attachment (CMAT) was performed for the retentive force under different dislodgement directions. Lateral forces to the abutment were also compared among the SMAT, CMAT, dome-shaped magnetic attachment, and a ball attachment. The SMAT maintained retentive force more effectively than the CMAT, even in oblique directions of dislodgement. A smaller lateral force to the abutment was found for the SMAT compared to the CMAT or ball attachment.
authors.affiliation: Department of Prosthodontics and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Yamadaoka Suita, Osaka, Japan. ymaeda@dent.osaka-u.ac.jp
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Maeda
authors.forename: Tsung-Chieh
authors.initials: TC
authors.lastname: Yang
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Kinoshita
mesh_terms: D016734:Dental Clasps; D003799:Dental Stress Analysis; D003779:Denture Design; D003781:Denture Retention / Q000295:instrumentation*; D003828:Denture, Overlay; D008280:Magnetics; D008334:Mandible; D003765:Models, Dental; D013314:Stress, Mechanical