title: Implant overdentures: bar versus ball attachment for mandibular implant supported overdentures--a randomised clinical trial.
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016734:Dental Clasps; D019094:Dental Prosthesis, Implant-Supported; D003834:Denture Precision Attachment; D003781:Denture Retention / Q000295:instrumentation*; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D008875:Middle Aged