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The Deformation of Small Diameter Solid Tibial Nails with Unreamed Intramedullary Insertion by C. Krettek; J. Mannß; B. Könemann; T. Miclau; P. Schandelmaier; H. Tscherne is a Medicine article available to read on EtoBox.

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'Radiation-independent' aiming systems for the placement of interlocking screws in intramedullary tibial nails have failed because of insertional related nail deformation. Prior to the development of these distal aiming systems, the variable position of the nails' interlocking holes after insertion must be known. In this study, the amount and direction of implant deformation of solid stainless-steel tibial nails (diameters of 8 and 9 mm, n = 20) were analyzed. Measurement of implant deflection (three translations, three angles) in the center of distal transverse locking hole was performed with a three-dimensional-magnetic motion tracker system after nail insertion in paired human cadaver tibiae. The results showed combined mean lateral translation of the 8 and 9 mm nails (n = 20) of -4.5 +/- 3.5 mm (range: 14.3 mm) and dorsal translation -7.8 +/- 5.8 mm (range: 19.2 mm). The combined mean rotational deformation about the longitudinal axis of the nail was 0.3 +/- 0.7 degree (range: 2.4 degrees). The authors conclude that a simple aiming arm, mounted on the proximal nail end alone, is not sufficient to provide accurate distal aiming.

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Author

C. Krettek; J. Mannß; B. Könemann; T. Miclau; P. Schandelmaier; H. Tscherne

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0021-9290)

Published

1997

Language

EN

Field

Medicine (Health Sciences)