title: Marginal adaptation of titanium frameworks produced by CAD/CAM techniques.
abstract: This study evaluated the Digitizing Computer System (DCS Production) for computer-controlled fabrication of titanium copings. The three-dimensional shape of the crown preparations was acquired through micropalpation with a contact digitizer on the master cast. In this in vitro study the marginal fit of computer-machined titanium frameworks for veneered crowns was assessed using scanning electron microscopy. Measurement of the marginal gap between the framework and the tooth was performed along the entire length of the finish line. The evaluation was based on 1,475 individual measurements on 10 test specimens. The mean values of marginal fit for the individual crowns ranged from 21.2 +/- 14.6 microns to 81.6 +/- 25.1 microns. The mean value for all crowns was 47.0 +/- 31.5 microns.
authors.affiliation: Department of Prosthodontics, School of Dentistry, University of Basle, Switzerland.
authors.forename: C
authors.initials: C
authors.lastname: Besimo
authors.forename: C
authors.initials: C
authors.lastname: Jeger
authors.forename: R
authors.initials: R
authors.lastname: Guggenheim
mesh_terms: D017076:Computer-Aided Design / Q000706:statistics & numerical data; D003442:Crowns / Q000706:statistics & numerical data; D003722:Dental Alloys; D003735:Dental Casting Technique; D018772:Dental Marginal Adaptation; D003779:Denture Design / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D003765:Models, Dental; D014025:Titanium
chemical_list: D003722:Dental Alloys; D014025:Titanium