MAKO Robotic-Arm Assisted Knee Replacement: What Patients Need to Know

An in-depth look at how MAKO robotic technology transforms knee replacement surgery, offering sub-millimeter precision, personalized implant positioning, and potentially faster recovery.

Robotic-assisted surgery has transformed the field of orthopedic joint replacement over the past decade. Among the most advanced systems available today is the MAKO robotic-arm platform, which Dr. Ali H. Sobh, MD uses for both total and partial knee replacement procedures. This article explains the technology, how it works, and what it means for patients considering knee replacement surgery.

What Is MAKO Robotic Technology?

MAKO is a robotic-arm assisted surgical system developed by Stryker Corporation. It combines 3D CT-based planning, robotic guidance, and haptic feedback technology to help surgeons perform knee replacement with unprecedented precision. The system does not replace the surgeon — rather, it enhances the surgeon's ability to execute the surgical plan with sub-millimeter accuracy.

The name "MAKO" comes from the company that originally developed the technology (Mako Surgical Corporation), which was acquired by Stryker in 2013. Since then, the system has been used in hundreds of thousands of joint replacement procedures worldwide and has been validated by extensive clinical research.

How the MAKO Process Works

• Pre-operative CT scan: A detailed CT scan of the patient's knee is used to create a 3D virtual model of the joint, capturing the unique anatomy of each patient.
• Personalized surgical plan: Dr. Sobh uses the 3D model to plan the optimal size, position, and alignment of the implant components specific to the patient's anatomy — before the surgery even begins.
• Robotic guidance during surgery: During the procedure, the robotic arm guides Dr. Sobh within the pre-defined surgical boundaries. The system provides real-time visual, auditory, and tactile feedback.
• Haptic safety boundary: The robotic arm restricts the surgeon's tools to the planned area, preventing damage to surrounding healthy tissue and ligaments. If the tool moves outside the planned zone, the system provides resistance.
• Verification and adjustment: Throughout the procedure, Dr. Sobh can verify implant positioning and make adjustments in real time, ensuring optimal alignment and ligament balance.

Benefits of MAKO Robotic Knee Replacement

Clinical studies have demonstrated several advantages of MAKO robotic-assisted knee replacement compared to traditional manual techniques:

• Greater implant accuracy: MAKO achieves implant positioning within 1-2 degrees of the planned alignment, compared to 3-4 degrees with manual techniques. This precision is critical for long-term implant survival and optimal function.
• Less tissue damage: The robotic system allows for more bone preservation and less disruption to surrounding soft tissue, which may contribute to faster recovery.
• Improved ligament balance: Real-time feedback helps the surgeon achieve optimal ligament tension, which is associated with better knee stability and range of motion.
• Potentially faster recovery: Several studies have shown that MAKO patients may walk independently sooner and require less pain medication compared to traditional knee replacement.
• Personalized approach: Every knee is different. The 3D planning process ensures the implant is sized and positioned for your specific anatomy, not a one-size-fits-all approach.

Is MAKO Right for Everyone?

While MAKO technology offers significant advantages, it is not necessary for every knee replacement. Dr. Sobh evaluates each patient individually to determine whether robotic-assisted surgery is the best approach. Factors include the complexity of the knee anatomy, the type of arthritis, patient goals, and overall health status.

For patients with complex knee deformity, significant bone loss, or those who are very active and want to maximize implant longevity, MAKO is often the preferred approach. For straightforward cases, traditional techniques may be equally effective. Dr. Sobh will discuss the best option for your specific situation during your consultation.

What to Expect After MAKO Surgery

Recovery after MAKO robotic knee replacement is similar to traditional knee replacement in timeline, though many patients report less pain in the early recovery period. Most patients walk with assistance on the day of surgery, transition to a cane within 2-3 weeks, and return to low-impact activities by 6-12 weeks. Physical therapy is essential for regaining full range of motion and strength.

If you would like to learn whether you are a candidate for MAKO robotic knee replacement, schedule a consultation with Dr. Sobh at our Royal Oak or Southfield office by calling (833) 667-3627.

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