MidMichigan Health - Joint Pain Assessment Icon

Assess how well your knee or hip joints are functioning. Take our FREE 5 minute assessment and receive recommendations for follow-up steps.

Take Free Assessment

Photo of a man and woman sitting by a treat in hiking clothes looking at a map.
Photo of a surgeon performing Robotics-Assisted knee replacement surgery.
Photo of Alex Pollock, robotics-assisted knee replacement patient, standing with his wife Elizabeth.

Robotic-Assisted Knee Surgery Expedited His Recovery Progress

"I was amazed that they had me up and walking the next day. My experience with MyMichigan overall has been terrific."

Alex's Story

Photo of Lorrain Banchoff, robotics-assisted knee replacement patient, standing with her horse.

Back in the Saddle Again After Robotics-Assisted Knee Replacement

"I credit my speedy recovery to my surgical team and my specialized physical therapy."

Lorraine's Story

Robotics-Assisted Knee Replacement

Robotics-assisted surgery combines the advantages of traditional innovative knee replacement methods, while minimizing the drawbacks to patients. This advanced technology, using the CORI™ Surgical System, is designed to help your orthopedic surgeon plan and perform knee replacement surgery with a greater degree of accuracy than is possible with traditional methods,4-8 and without the need for metal rods, CT scans or pre-surgical MRIs. Smith+Nephew, the only company offering handheld robotics-assisted technology for partial and total knee replacements, believes this enhanced level of accuracy can give patients a better long-term outcome.4-6,9

To schedule an appointment with an orthopedic surgeon who specializes in robotics-assisted knee replacements, call (833) 923-3444.

How the CORI Surgical System Works

This short video demonstrates how the handheld robotics-assisted tools are used by an orthopedic surgeon to remove damaged surfaces, balance the joint and position the knee implant.

Robotics-Assisted Partial Knee Replacement

Most often, this procedure is an option for early to mid-stage knee pain and damage. With this type of knee implant your orthopedic surgeon replaces the area of your knee that is damaged while keeping the supporting tissue and ligaments that help stabilize your knee.

Accurate implant placement is especially important with a partial knee replacement since it requires that your new implant be correctly balanced with your remaining bone and cartilage in your joint. The CORI System uses a handheld robotics-assisted system that helps design a surgical plan that allows your surgeon to keep as much of your healthy bone and cartilage as possible.

Robotics-Assisted Total Knee Replacement

Most often, this procedure is an option for advanced knee pain and damage. With this type of knee implant your orthopedic surgeon replaces your entire knee joint. It's one of the most common procedures performed in all of medicine. 

Since no two knee joints are the same, aligning your new knee implant requires your surgeon to match its position with your knee's existing range of motion. The CORI System uses a robotics-assisted, handheld device - placing an additional layer of planning and accuracy directly into your surgeon’s hands.

CORI Surgical System Tools

Photo of the CORI card - Robotics-Assisted knee replacement cart.

Surgical System Cart

Photo of the CORI handpiece - Robotics-Assisted knee replacement tool.

Robotics-Assisted Knee Handpiece

Photo of the CORI implant planning - Robotics-Assisted knee replacement mapping tool.

Robotics-Assisted Knee Replacement Planning

Photo of the CORI - Advanced Surgical Instrumentation.

Advanced Surgical Instrumentation

About the CORI Surgical System

The CORI Surgical System uses handheld robotics-assisted technology designed to help your orthopedic surgeon plan and perform your unique procedure. This robotics-assisted approach is efficient and more accurate than traditional knee surgery.5,6,8 At the beginning of your surgery, your surgeon will use the CORI System to create a customized 3D digital model of your knee. This three-dimensional view helps finalize and verify the selection of your knee implant and create a plan for your surgery without the need for either a CT scan or MRI. During the procedure, the CORI System works in conjunction with your surgeon’s surgical training to achieve accurate positioning of the knee implant based on your unique anatomy.7,10,11,18,20,21 The system sends precise information about your knee to the robotics-assisted handpiece more than 300 times per second, allowing your surgeon to remove damaged surfaces, balance your joint and position the implant with accuracy.7,10,11,18,20,21 The result is a naturally shaped knee, made from materials designed to last longer, that is positioned with an added level of accuracy to allow for a quicker, smoother recovery.*1,2†


Not all patients are candidates for the Smith+Nephew knee products. Knee replacement surgery is intended to relieve knee pain and improve knee functions. Implants may not produce the same feel or function as your original knee, and individual results will vary. Potential risks include loosening, wear and infection that may result in the need for additional surgery. There are risks associated with any surgical procedure, including CORI-enabled Knee Replacement. CORI Surgical System is not for everyone. Discuss your condition and implant options with your surgeon to determine if the CORI Surgical System is right for you. Children, pregnant women, patients who have mental or neuromuscular disorders that do not allow control of the knee joint, and morbidly obese patients should not undergo a CORI-enabled procedure. The information listed on this webpage is for informational purposes and is not meant as medical advice. For more information, please talk to your surgeon or visit RediscoverYourGo.com.


* Partial knee replacement vs conventional techniques

  1. Sephton BM, Bakhshayesh P, Edwards TC, Ali A, Kumar Singh V, Nathwani D. Predictors of extended length of stay after unicompartmental knee arthroplasty. J Clin Orthop Trauma. 2019. 11(Suppl 2):S239-45
  2. Canetti R, Batailler C, Bankhead C, Neyret P, Servien E, Lustig S. Faster return to sport after robotic-assisted lateral unicompartmental knee arthroplasty: a comparative study. Arch Orthop Trauma Surg. 2018;138(12):1765-1771
    † n=28 (n=11 robotic procedures)
  3. Al-Shaer DS, Ayoub O, Ahamed NA, Al-Hibshi AM, Baeesa SS. Cerebral fat embolism syndrome following total knee replacement causing a devastating neurocognitive sequelae 2016 Jul; 21(3): 271-274
  4. Battenberg AK, Netravali NA, Lonner JH. A novel handheld robotic-assisted system for unicompartmental knee arthroplasty: surgical technique and early survivorship.J Robot Surg.
  5. Batailler C, White N, Ranaldi FP, et al. Improved implant position and lower revision rate with robotic assisted unicompartmental knee arthroplasty.Knee Surg Sports Traumatol Arthrosc.2019;27:1232.
  6. Herry Y BC, 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.
  7. Gregori A, Smith JR, Picard F, Lonner JH, Jaramaz B. Accuracy of imageless robotically assisted unicondylar knee arthroplasty. Paper presented at: International Society for Computer Assisted Orthopaedic Surgery (CAOS) 15th Annual Meeting; 2015; Vancover, Canada.
  8. Bollars P, Boeckxstaens A, Mievis J, Kalaai S, Schotanus MGM, Janssen D. Preliminary experience with an image?free handheld robot for total knee arthroplasty: 77 cases compared with a matched control group. Eur. J. Orthop Surg Traumatol. 2020;30(4):723-9
  9. Sharkey PF, Hozack WJ, Rothman RH, Shastri S, Jacoby SM. Why Are Total knee Arthroplasties Failing Today?Clinical Orthopaedics and Related Research.2002;404:7-13
  10. Bollars P, Boeckxstaens A, Mievis J, Janssen D. The Learning Curve and Alignment Assessment of an Image-Free Handheld Robot in TKA: The First Patient Series in Europe. Poster presented at: 19th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery. 2019; New York, USA.
  11. Kopjar B, Schwarzkopf R, Chow J, et al. NAVIO Robotic Assisted Surgical System for Total Knee Arthroplasty Using JOURNEY II Guided-Motion Total Knee System. Poster presented at: ISTA 2-5 October, 2019; Toronto, Canada.
  12. https://www.arthritis.org/diseases/osteoarthritis. Accessed 22 Oct 2020
  13. Gregori A, Picard F, Bellemans J, Smith JR, Simone A. Handheld Precision Sculpting Tool for Unicondylar Knee Arthroplasty. A Clinical Review. Poster presented at: 15th EFORT Congress;4-6 June, 2014; London, UK
  14. Mitra R, Jaramaz B, Nikou C, Kung C. Accuracy Assessment of a Novel Image-Free Handheld Robot for Knee Arthroplasty in Bi-Cruciate retaining knee and total knee replacement - A Cadaveric Study. World Arthroplasty Congress;2018; Rome, Italy.
  15. Kaper BP, Villa A. Accuracy and Precision of a Handheld Robotic-guided Distal Femoral Osteotomy in Robotic-assisted Total Knee Arthroplasty. European Knee Society Arthroplasty Conference;2019; Valencia, Spain

©2017 Smith & Nephew, Inc. All rights reserved. CORI is a Trademark of Smith+Nephew. 27717 11/20

Schedule An Appointment

Schedule an appointment with an orthopedic surgeon who specializes in robotics-assisted knee replacements, call (833) 923-3444.