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How NAVIO Works


How NAVIO◊ Handheld Robotics works

Operational guidance, features and customizable options

The NAVIO Surgical System offers image-free data collection, surface mapping and bone resection- now with a shorter learning curve and a streamlined preoperative planning phase with our 7.0 operating system upgrade*.

How NAVIO works:

Image-free registration: real-time characterization of bone and cartilage through landmark collection and point mapping, without preoperative imaging.

Patient-specific planning: Visualize cuts and gap balancing prior to bone preparation, to help eliminate extensive ligament releases. Customize the plan for each patient using mechanical alignment and ligament data.

Robotics-assisted bone preparation: Two control modes that automatically adjust to execute patient-specific plans with accuracy1-9:

  • Exposure control: the bur extends and retracts from the guard, based on proximity to the target cut surface.
  • Speed control: exposed bur speed adjusts according to proximity to the target cut surface.

Confirmation: Upon completion, surgeons can assess the initial outcome of both long leg alignment and knee balance.

Watch how NAVIO works in total knee and partial knee arthroplasty. 

Multiple bone removal options – whatever your preference

The NAVIO Surgical System facilitates accurate bone removal1-9 with real-time feedback, according to surgeon preference:

Distal bur: An efficient, robotic-assisted hybrid technique using saws and burs to prepare the distal femur for an AP cutting guide (suitable for TKA and XR).

Bur-all – for robotics purists: a complete, bur-only robotics method (Suitable for UKA/XR and TKA).

Study: NAVIO shows high-level accuracy and few errors in tibial and femoral surface preparation for better mechanical axis alignment9.

Why use NAVIO Handheld Robotics?

How NAVIO compares to conventional instruments

Manual instruments include alignment rods that are intra- or extra-modulary that centralise and align the components according to the
surgical plan.

Conventional alignment guides:

  • Lack precision10,11
  • Are not tailored to each patient's individual morphology
  • Can result in inadvertent deviations from the surgical plan2

Robotic systems include passive, semi-active and active systems with a robotic arm, robotic guided cutting jigs and robotic milling systems.
For total and partial knee replacement, robotic systems may:

  • Help surgeons avoid surgical errors10,12
  • Decrease variability12
  • Increase accuracy in mechanical alignment for more natural kinematics12-15

As the latest step in robotics technology, NAVIO combines image-free planning, guidance and accurate execution to help optimise kinematics and gap balancing1-9.

The largest range of compatible implants

The NAVIO Surgical System is currently the only handheld robotics system for knee surgery and features the largest portfolio of compatible implants for total and partial knee arthroplasty.

Total knee implants




LEGION Total Knee System Portfolio

GENESIS II Total Knee System Portfolio

Partial knee implants



JOURNEY UNI Unicompartmental Knee System




JOURNEY PFJ Patellofemoral Joint System


STRIDE Unicondylar Knee System***
 ZUK◊  Unicondylar Knee System**

For guidance on knee implant selection, please contact us

 *compared with conventional techniques
***Available in the US only


1)   Herry Y, Batailler C, Lording T, Servien E, Neyret P, Lustig S. Improved joint-line restitution in unicompartmental knee arthroplasty using a robotic-assisted surgical technique. Int Orthop. 2017;41:2265-2271.
2)   Batailler C, White N, Ranaldi F, Neyret P, Servien E, Lustig S. Improved implant position and lower revision rate with robotic-assisted unicompartmental knee arthroplasty. European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESS­KA) 2018.
3)    Jaramaz B, Nikou C, Casper M, Grosse S, Mitra R. Accuracy validation of semi-active robotic application for patellofemoral arthroplasty. Paper presented at: International Society for Computer Assisted Orthopaedic Surgery; June 17-20, 2015; Vancover, Canada.
4)   Jaramaz B, Mitra R, Nikou C, Kung C. Technique and Accuracy Assessment of a Novel Image-Free Handheld Robot for knee Arthroplasty in Bi-Cruiciate Retaining Total Knee Replacement. EPiC Series in Health Sciences. 2018;2:98-101. K.
5)   Data on file Smith & Nephew. Sg2 Healthcare Intelligence: Technology guide. 2014.
6)   Gregori A, Picard F, Bellemans J, Smith J, Simone A. Handheld precision sculpting tool for unicondylar knee arthroplasty. A clinical review. Abstract presented at: 15th EFORT Congress; June 4-6, 2014; London, UK.
7)   Smith JR, Picard F, Lonner J, Hamlin B, Rowe P, Riches P, Deakin A. The accuracy of a robotically-controlled freehand sculpting tool for unicondylar knee arthroplasty. Congress of the International Society of Biomechanics. 4-9 August, 2013. Natal, Brazil.
8)   Gustke K, Golladay G, Roche MW, Jerry G, Elson LC, Anderson CR. Increased Patient Satisfaction After Total Knee replacement using sensor-guided technology. Bone Joint J 2014;96-B:1333–8.
9)   Gregori A, Picard F, Lonner J, Smith J, Jaramaz B. Accuracy of imageless robotically assisted unicondylar knee arthroplasty. Paper presented at: International Society for Computer Assisted Orthopaedic Surgery; June 17-20, 2015; Vancover, Canada.
10) Pastides P, Nathwani D. The role of newer technologies in knee arthroplasty. Orthopaedics and Trauma. 2017;31:47-52.
11) Nair R, Tripathy G, Deysine GR. Computer navigation systems in unicompartmental knee arthroplasty: a systematic review. Am J Orthop. 2014;43:256-261.
12) Jacofsky DJ, Allen M. Robotics in arthroplasty: a comprehensive review. J Arthroplasty. 2016;31:2353-2363.
13) Lonner JH. Robotically assisted unicompartmental knee arthroplasty with a handheld image-free sculpting tool. Orthop Clin North Am. 2016;47:29-40.
14) Roche M. Robotic-assisted unicompartmental knee arthroplasty. The MAKO experience. Orthop Clin North Am. 2015;46:125-131.
15) Lonner JH, Moretti VM. The evolution of image-free robotic assistance in unicompartmental knee arthroplasty. Am J Orthop. 20 International Society for Computer Assisted Orthopaedic Surgery; June 17-20, 2015; Vancover, Canada.

For more clinical evidence, expert lectures and surgical demonstrations for Handheld Robotics & Enabling Technologies, visit
Education & Evidence.

Education and Evidence Website

Watch other surgical videos, user interviews and see the latest webinar recordings at BroadcastMed.

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