SELF-RETAINING SCREW GAG.

Zirconium implant abutments: fracture strength and influence of cyclic loading on retaining-screw loosening.

OBJECTIVE The purpose of this study was to determine the fracture strength of zirconium implant abutments and the torque required to unfasten the retaining screw before and after applying cyclic loading to the implant-abutment assembly. The dynamic behavior and stress distribution pattern of zirconium abutments were also evaluated. METHODS AND MATERIALS Static and cyclic loading of 7 XiVE imp...

Stratified Self Calibration from Screw-Transform Manifolds

Metric Self Calibration from Screw-Transform Manifolds

Abstract This paper introduces a method for metric selfcalibration that is based on a novel decomposition of the fundamental matrix between two views taken by a camera with fixed internal parameters. The method blends important advantages of the Kruppa constraints and the modulus constraint: it works directly from fundamental matrices and uses a reduced-parameter representation for stability. G...

Screw-transform Manifolds for Camera Self Calibration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Camera calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Applications of camera calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Calibration by manifold...

Stratiied Self Calibration from Screw-transform Manifolds

This paper introduces a new, stratiied approach for the metric self calibration of a camera with xed internal parameters. The method works by intersecting modulus-constraint manifolds, which are a speciic type of screw-transform manifold. Through the addition of a single scalar parameter, a 2-dimensional modulus-constraint mani-fold can become a 3-dimensional Kruppa-constraint manifold allowing...