Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: General Orthopaedics
Abstract number: 26263
PATIENT-SPECIFIC GUIDE TECHNOLOGY IN ORTHOPAEDICS
Frederik GELAUDE 1 , Martijn RAAIJMAKERS 2 , Karla DE SMEDT 3 , Tim CLIJMANS 1 ,
Filip STOCKMANS 4 , Michiel MULIER 2
1 Mobelife, Leuven (BELGIUM), 2 Department of Reconstructive Hip Surgery, UZ
Pellenberg, University Hospitals Leuven, Pellenberg (BELGIUM), 3 Materialise,
Leuven (BELGIUM), 4 Department of Orthopaedics, AZ Groeninge, Kortrijk
(BELGIUM)
Introduction: Orthopaedic surgery typically involves positioning of osteotomies, pins,
wires, screws and implants. Pin and wire placement can be an intermediate step to
position an implant component into a pre-determined position, or to determine the
screw pre-drill trajectory by specific entry point and direction. Both clinical and
biomechanical studies show the need for accurate positioning of implants and
screws, due to its major influence on the long-term survival [Beaulé 2004]. Patientspecific
guide technology has recently been successfully introduced in TKA, but can
prove efficient in new application domains as well. Materials and Methods: Based on
three-dimensional medical image data and pre-operative planning software, a
surgical plan is established and a patient-specific surgical guide is designed. These
surgical guides fit either to the bone or the implant in a unique way and show the
cutting planes or drill holes generated in the surgery plan. The guides are
manufactured by additive fabrication technology (Materialise, Leuven, Belgium). The
material is bio-compatible, medical grade and sterilizable. Results: The potential of
patient-specific guide technology is illustrated by different retrospective and clinical
cases in the field of total hip arthroplasty, hip resurfacing, total shoulder arthroplasty,
hand and wrist surgery and complex bone fracture fixation surgery. High accuracy
can be attained; e.g. the average three dimensional angle variation and the average
entry position variation in hip resurfacing applications equal respectively 1.14 ± 0.57
degrees and 1.01 ± 0.47mm.Conclusion. Patient-specific guide technology in
Orthopaedics shows high potential for accuracy improvement and surgery time
reduction.
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