Method for the manufacture of dental prosthesis frameworks of the type screwed to a plurality of osteo-integrated implants in the mandibular or maxillary bone

Method for the manufacture of dental prosthesis frameworks of the type screwed to a plurality of osteo-integrated implants in the mandibular or maxillary bone
US Patent Office
Application Number: 20050019728
Kind Code A1
Publication Date: January 27, 2005
Inventors: Rostagno, Luigi; (Rivara Canavese, IT) ; Marta, Sandro; (Alpignano, IT) ; Nicli, Giuseppe; (Volpiano, IT)
Correspondence Name and Address: SUGHRUE MION, PLLC
2100 PENNSYLVANIA AVENUE, N.W.
SUITE 800
WASHINGTON
DC
20037
US
Assignee Name and Adress: ACOM S.R.L.
Serial No.: 849248
Series Code: 10
Filed: May 20, 2004
Abstract
Into the mandibular or maxillary bone of a patient a plurality of osteo-integrated implants (10) are inserted. Each implant (10) has a bearing surface (12) for a mating surface (13) of a framework (F), and a threaded hole (15) perpendicular to the bearing surface (12) and capable of receiving a screw (14) for connecting the framework to the implant (10). To each implant is coupled a gauge (20) with a stem (21) screwed into the threaded hole (15) of the implant and a spherical head (22) protruding visibly beyond the edge of the patient's gum. Images of the oral cavity are obtained from different viewpoints, and from those images data regarding the position of the centres (Z) of the spherical heads and data regarding the orientation of the stems (21) are obtained. These data indicate the positions and orientations of the bearing surfaces (12) of the implants (10) and are used to control the operation of a numerically controlled milling machine for machining a framework (F) having bearing surfaces (13) mating with the bearing surfaces (12) of the implants installed in the oral cavity of the patient.