Praxiteles : A Miniature Bone-Mounted Robot for Minimal Access Total Knee Arthroplasty

We have been working to develop a compact, accurate, safe, and easy-to-use surgical robot for minimally invasive total knee arthroplasty (TKA). The goal of our bone-mounted robot, named after the Greek sculptor Praxiteles, is to precisely position a surgical bone-cutting guide in the appropriate planes surrounding the knee so that the surgeon can perform the planar cuts manually using the guide. The robot architecture is comprised of 2 motorized degrees of freedom (DoF) whose axes of rotation are arranged in parallel and are precisely aligned to the implant cutting planes with a 2 DoF adjustment mechanism. Two prototypes have been developed, an initial version for open TKA and a new version for minimally invasive TKA which mounts on the side of the knee. A novel bone-milling technique is also presented that uses passive guide and a side-milling tool. Initial results on artificial bones and cadavers with the Praxiteles robot are very promising, and we intend to start a series of clinical trials in the near future.

References :
Plaskos C, Cinquin P, Lavallée S, Hodgson AJ : Praxiteles : a miniature bone-mounted robot for minimal access total knee arthroplasty. Journal of Medical Robotics and Computer Aided Surgery. 2005. In Press.

Collaborations : Dr Eric STINDEL – CHU de Brest, Hôpital de la Cavale Blanche, Chirurgie Orthopédique et Traumatologique) ; Dr. Jacques RIT – Hopital Grace de Monaco (CHPG) Orthopaedic Department 2 ; PRAXIM-Medivision, La Tronche, France.

Status : Ongoing validation on cadavers with a number of collaborating surgeons. One PhD thesis to defend in 2005, plus several ongoing students.

More information : project web page if any

Contact :

Laboratoire TIMC-IMAG, Domaine de la Merci, 38706 La Tronche Cedex

Grenoble INP
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