PAPERS: Novel Applications of Design for AM

Patient-Specific Clavicle Reconstruction Using Digital Design and Additive Manufacturing

[+] Author and Article Information
Marie Cronskär

Sports Tech Research Centre,
Mid Sweden University,
Akademigatan 1,
Östersund 831 25, Sweden
e-mail: marie.cronskar@miun.se

Lars-Erik Rännar

Sports Tech Research Centre,
Mid Sweden University,
Akademigatan 1,
Östersund 831 25, Sweden
e-mail: lars-erik.rannar@miun.se

Mikael Bäckström

Sports Tech Research Centre,
Mid Sweden University,
Akademigatan 1,
Östersund 831 25, Sweden
e-mail: mikael.backstrom@miun.se

Kjell G Nilsson

Department of Surgical and Perioperative
University of Umeå,
Umeå 901 87, Sweden
e-mail: kjell.g.nilsson@umu.se

Börje Samuelsson

Department of Orthopaedics,
Östersunds Hospital,
Östersunds sjukhus, Ortopedmottagningen,
Östersund 831 83, Sweden
e-mail: borje.samuelsson@jll.se

1Corresponding author.

Contributed by the Design for Manufacturing Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received February 13, 2015; final manuscript received May 26, 2015; published online October 12, 2015. Assoc. Editor: David Rosen.

J. Mech. Des 137(11), 111418 (Oct 12, 2015) (4 pages) Paper No: MD-15-1097; doi: 10.1115/1.4030992 History: Received February 13, 2015; Revised May 26, 2015

There is a trend toward operative treatment for certain types of clavicle fractures and these are usually treated with plate osteosynthesis. The subcutaneous location of the clavicle makes the plate fit important, but the clavicle has a complex shape, which varies greatly between individuals and hence standard plates often have a poor fit. Using computed tomography (CT) based design, the plate contour and screw positioning can be optimized to the actual case. A method for patient-specific plating using design based on CT-data, additive manufacturing (AM), and postprocessing was initially evaluated through three case studies, and the plate fit on the reduced fracture was tested during surgery (then replaced by commercial plates). In all three cases, the plates had an adequate fit on the reduced fracture. The time span from CT scan of the fracture to final implant was two days. An approach to achieve functional design and screw-hole positioning was initiated. These initial trials of patient-specific clavicle plating using AM indicate the potential for a smoother plate with optimized screw positioning. Further, the approach facilitates the surgeon's work and operating time can be saved.

Copyright © 2015 by ASME
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Grahic Jump Location
Fig. 1

Work flow for modeling and manufacturing of a patient-specific bone plate [17]. SFF is short for solid free form, which is an older term for AM.

Grahic Jump Location
Fig. 2

The procedure from digital 3D reconstruction of the fracture to test fitting the plate in surgery, in C3

Grahic Jump Location
Fig. 3

3D CT reconstructions of the fractures in C1–C3




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