Konstantinos X. Michalakis  , Konstantinos D. Chrysafis  , Hiroshi Hirayama  , Pavlos D. Garefis  , Argiris L. Pissiotis  , 
    Is the Passive Fit of the Cast in One-Piece Screw-Retained Dental Implant Superstructures Feasible? Theoretical Considerations,
    Journal of Engineering and Applied Sciences,
    Volume 1,Issue 4,
    2006,
    Pages 422-427,
    ISSN 1816-949x,
    jeasci.2006.422.427,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2006.422.427)
    Abstract: The  aim  of  this  study was  to  theoretically  evaluate  whether  the  passivity  of  the  fit  of  the  cast in one-piece screw retained dental implant-supported prosthesis is feasible. A mathematical approach was used for the purposes of this study. It was proved that the distortion of the cast in one-piece screw retained dental implant prosthesis is inevitable. Any effort for the fabrication of a cast in one-piece implant screw retained superstructure with a passive fit is impracticable. This is due to the involvement of too many materials and technical  factors.  The  summation  of  the  small  independent  distortions  that  these  factors  cause  cannot total to zero.
    Keywords: Screw-retained dental implant superstructures;passive fit of dental implant prostheses