Robotic Joint Center | World-Class Partial & Total Knee Replacement

Robotic Joint Center

The Robotic Joint Center at The Stone Clinic is an international destination for robotic-assisted joint replacement surgery for total and partial knee replacement. 

We have patients now running triathlons and (ultra)marathons, climbing mountains, skiing a hundred days a year on their replaced parts inside their knee. The groundbreaking innovations in robotic surgery are redefining the limits of our athletes and expanding the expectations of what is possible after knee replacement. 

Experienced and Skilled Surgeon

Kevin R. Stone, MD is one of the country’s most experienced outpatient MAKOplasty® surgeons. Dr. Stone has performed over 4500 knee operations (both biologic and robotic-assisted). He was one of the first surgeons to optimize outpatient robotic partial knee replacement. Follow-up studies show a very high success rate since robotic surgery began in 2012. Dr. Stone is consistently listed as one of the country’s top 25 Ambulatory Surgery Center (ASC) leaders and ranks amongst the country’s top 75 knee surgeons1.

Key Benefits for Patients

Dr. Stone performs robotic knee replacements using the Stryker MAKO Robotic-Arm Assisted Orthopaedic System. In an outpatient procedure, the MAKO robotic arm—programmed to follow a computerized 3-D model of the patient’s knee—is guided by Dr. Stone to remove only the damaged tissue from the joint and insert the implants with exquisite, consistently reproducible precision. This minimally invasive technique gives the patient a strong, natural-feeling knee that provides rapid pain relief and a return to an active lifestyle. Below are some of the benefits of a robotic-assisted knee replacement.

All robotic surgery at The Stone Clinic: 

  • Extremely high accuracy of anatomical placement2
  • A more natural knee motion
  • Quick recovery3,4
  • No muscles are cut, less tissue/bone removal
  • Personalized surgical plan
  • Small incisions, less scarring
  • No staples to remove
  • Less pain5,6,7 & meds
  • Minimal blood loss & extremely low blood clot risk
  • Outpatient procedure with no overnight hospital stay required

Unique Partial Knee Replacement benefits:

  • All 4 stabilizing ligaments remain intact (ACL, PCL, MCL, LCL)
  • Non-arthritic articular cartilage left intact 
  • A unicompartmental replacement may be expanded into a bi-compartmental or total knee replacement later in life

Unique Total Knee Replacement benefits:

  • Advanced knee implant that fuses directly with bone to allow a return to high-level and impact sports.

Our Robotic Knee Replacement Patient Stories

Hear directly from patients who've undergone our robotic joint replacement program to safely return to their favorite activities. With world-class surgery and dedication to the specialized StoneFit rehab program, these patients provide proof and inspiration of what life after knee replacement can be. 

How Robotic-Assisted Surgery Works

MAKO Surgery Planning Screen of CT Scan

Personalize Surgical Planning

No two knee joints are exactly the same. So, the first step is patient-specific surgical planning. Before surgery, we take a CT scan of your knee to develop a complete 3D virtual model of your unique knee joint. 

Dr. Stone uses this model to fully evaluate your bone structure, disease severity, joint alignment, and even the surrounding bone and tissue, so he can determine the optimal size, placement, and alignment of your implant within your knee. It is this level of pinpoint precision that provides a more natural knee motion following surgery.

Remove Arthritic Bone

In the operating room, the combination of a robotic arm an​d computer navigation provides Dr. Stone with real-time visual, tactile, and auditory feedback to help him guide MAKO’s robotic arm to remove the arthritic bone and cartilage from the knee while staying safely within the boundaries of your personalized surgical plan— ensuring that only diseased bone is removed and all healthy bone and soft tissue are preserved.  

Place Implant

With the diseased bone gone, your implant is placed according to your plan. 

For partial knee replacements, we can resurface each compartment of the knee independently (as unicompartmental or unicondylar replacement) or in combination (as a bi-compartmental knee replacement). 

When a total knee replacement is necessary, we use a specialized implant, the MAKO Triathalon Total Knee Implant, with a porous undercoating specially designed to allow the patient’s bone to grow into the implant. This fixes the device securely to the knee without the use of bone cement traditionally used to attach the implant to the bone in old hand-held methods of knee replacement surgery. 

By eliminating bone cement and using modern components that grow into the bone, the possibility of the implants coming loose due to cement failure is reduced dramatically. Once the bone heals to the components, full sports are then permitted including running. 

MAKO Triathlon Knee Implant

Partial Knee Replacement

Knees do not wear out evenly. Sometimes one part of the knee is perfectly healthy while another part is severely damaged. Depending on the location and the extent of your injury, a partial knee replacement may be an option for you.

Outpatient Total Knee Replacement

Only if a knee is worn out on all sides of the joint, is angulated severely, or has other confounding factors, do we use a total knee replacement (though we do not usually replace the patella). Moreover, when we perform a knee replacement we use uncemented components that the body can grow into. Extremely accurate robotic guidance permits us to use this cementless option in over 95% of our joint replacements. 

World-Class Physical Therapy

Our skilled, onsite physical therapists have developed meticulous partial and total knee rehab protocols to help our patients get back to an active lifestyle as quickly as possible. 

Complimentary Virtual/ Phone Consultation

Patients from across the United States and around the world come to the Robotic Joint Center at The Stone Clinic in San Francisco to have their knees repaired by Dr. Stone.

To find out if a robotic-assisted partial or total knee replacement is right for you, you may schedule a complimentary consultation for Dr. Stone to personally review your injury via Zoom video conference meeting or phone call.

Citation References

1  Bell, S. W., Anthony, I., Jones, B., MacLean, A., Rowe, P., & Blyth, M. (2016). Improved Accuracy of Component Positioning with Robotic-Assisted Unicompartmental Knee Arthroplasty: Data from a Prospective, Randomized Controlled Study. The Journal of Bone and Joint Surgery. American volume, 98(8), 627–635.

2  Hozack, W. J. (2018). Multicenter analysis of outcomes after robotic-arm assisted total knee arthroplasty. Orthopaedic Proceedings, 100-B(SUPP_12).

3  Kayani, B., Konan, S., Tahmassebi, J., Pietrzak, J., & Haddad, F. S. (2018). Robotic-arm assisted total knee arthroplasty is associated with improved early functional recovery and reduced time to hospital discharge compared with conventional jig-based total knee arthroplasty: a prospective cohort study. The Bone & Joint Journal, 100-B(7), 930–937.

4  Kayani, B., Konan, S., Tahmassebi, J., Rowan, F. E., & Haddad, F. S. (2019). An assessment of early functional rehabilitation and hospital discharge in conventional versus robotic-arm assisted unicompartmental knee arthroplasty: a prospective cohort study. The Bone & Joint Journal, 101-B(1), 24–33.

 Blyth, M., Anthony, I., Rowe, P., Banger, M. S., MacLean, A., & Jones, B. (2017). Robotic arm-assisted versus conventional unicompartmental knee arthroplasty: Exploratory secondary analysis of a randomised controlled trial. Bone & Joint Research, 6(11), 631–639.

6  Bhowmik-Stoker M, Faizan A, Nevelos J, et al. Do total knee arthroplasty surgical instruments influence clinical outcomes? A prospective parallel study of 150 patients. Orthopaedic Research Society annual meeting, February 2-5, 2019. Austin, TX.

Download a Guide to our Knee-Saving Procedures

Saving My Knee Guide

Saving My Knee Guide
Learn about procedures that can help you return to sports & delay or avoid an artificial knee replacement.
Download a Guide to our Knee-Saving Procedures
Explore all your options. Learn about procedures that can help you return to sports & delay or avoid an artificial knee replacement.