Is Robotic Knee Replacement Right For Me?

Yes, you may qualify for robotic knee replacement surgery if you have severe knee damage that requires greater precision in bone preparation and implant alignment. This approach uses robotic technology to improve implant positioning and may reduce early postoperative pain. However, your overall health and your surgeon’s experience determine your long-term results.

At Total Orthopedics and Sports Medicine, our experienced surgeon, Dr. Eric Lepkowsky, carefully evaluates your knees and medical history to determine your eligibility for surgery. He also assesses your anatomy, daily activity level, and treatment goals to recommend the most appropriate surgical approach. This detailed evaluation supports safer care and better long-term outcomes. Call 855-321-6784 to schedule your appointment with our surgeon in Massapequa.

When Do Surgeons Recommend Robotic Knee Replacement?

Our surgeon, Dr. Eric Lepkowsky, may recommend robotic knee replacement surgery if severe arthritis, chronic pain, or a knee injury limits your mobility despite nonsurgical care. He may also recommend this approach when complex deformities, abnormal bone anatomy, avascular necrosis, or previous knee replacement surgery require greater precision. Here is how robotic technology improves precision and supports better joint alignment in these cases:

Severe Osteoarthritis

Advanced osteoarthritis often leads to total knee replacement when the joint damage becomes severe. Over time, the cartilage wears away, allowing the bones inside the knee joint to rub against each other. This constant friction causes pain, swelling, and stiffness during daily activities. In such cases, robotic-assisted surgery supports accurate bone preparation and implant placement.

Rheumatoid Arthritis

Unlike osteoarthritis, rheumatoid arthritis damages the joint through an autoimmune disease (a condition where the immune system attacks healthy tissue). This ongoing inflammation gradually destroys the cartilage and joint lining. As the damage progresses, walking and standing become more difficult. When severe damage develops, robotic knee replacement surgery restores joint function with greater precision.

Post-Traumatic Arthritis

A serious knee injury can gradually damage the joint years after the original accident. Previous fractures or ligament tears often accelerate cartilage wear in the knee joint. As a result, pain and stiffness continue even after conservative treatment. In these cases, robotic technology helps surgeons plan accurate implant positioning around damaged bone.

Severe Joint Deformity

Some people develop severe bowlegs or knock-knees that change normal leg alignment. This abnormal position places uneven pressure across the knee joint over many years. As the deformity worsens, walking becomes more difficult and painful. Robot-assisted surgery allows greater precision when correcting these complex alignment problems.

Chronic Refractory Pain

Persistent knee pain can continue even while you rest or sleep. This constant discomfort often limits walking, climbing stairs, and other daily activities. If this discomfort persists despite nonsurgical treatment, our robotic knee surgeon, Dr. Eric Lepkowsky, may recommend robotic knee replacement surgery. This procedure supports accurate implant positioning and improves joint function.

Failed Prior Surgeries

Some previous knee operations do not restore normal joint function or implant alignment. Loose implants, worn components, or ongoing pain may require revision surgery (a second operation to correct or replace the previous implant). These complex cases demand careful planning before surgery begins. Preoperative imaging and robotic technology allow Dr. Eric Lepkowsky to place the new implant with greater accuracy.

Avascular Necrosis (Osteonecrosis)

Avascular necrosis occurs when part of the knee joint loses its blood supply. Without adequate blood flow, the affected bone tissue gradually dies and weakens. As the damage progresses, the bone can collapse and damage the surrounding cartilage. In such cases, Dr. Eric Lepkowsky may recommend robotic knee replacement surgery to restore joint function and improve alignment.

What Symptoms Signal You Need A Knee Replacement?

You may need knee replacement surgery if severe knee pain continues even during rest or at night despite conservative treatment. As the damage progresses, ongoing swelling and stiffness can limit your ability to walk, climb stairs, or perform daily activities. These symptoms often indicate advanced knee joint damage that requires a surgical evaluation.

In addition, the following warning signs may indicate that knee replacement surgery is the right treatment option:

• Sleep Disruption: Knee pain wakes you during the night or prevents you from falling asleep.
• Visible Leg Deformity: Your leg develops a noticeable bowing or knock-knee appearance.
• Severe Stiffness: You cannot fully bend or straighten your leg, which limits normal movement.

Which Tests Confirm You Need Joint Replacement Surgery?

To determine your eligibility for knee replacement surgery, your doctor orders imaging tests such as weight-bearing X-rays and MRI scans. In some cases, doctors may also recommend CT scans to create detailed 3D bone models of the patient’s knee for robotic-assisted surgery.

They also perform a detailed physical examination to assess your range of motion, joint stability, leg alignment, and walking pattern. Once surgery is recommended, surgeons may order the following tests to assess your medical condition before the procedure:

Blood Tests

Before robotic surgery, your surgeon requests blood tests to evaluate your overall health. These tests check for anemia, infection, and kidney and liver function. These results identify health conditions that require treatment before surgery. Early treatment lowers the risk of complications during and after the procedure. Your surgeon reviews these findings to plan the safest surgical approach for the robotic procedure.

Electrocardiogram (ECG/EKG)

An ECG records your heart’s electrical activity. This test detects abnormal heart rhythms and other heart conditions, such as:

• Arrhythmia: An irregular heartbeat that can affect anesthesia safety.
• Previous Heart Attack: Signs of earlier heart muscle damage.
• Coronary Artery Disease: Reduced blood flow to the heart muscle.
• Heart Enlargement: Changes in heart size that may require further evaluation.

Your surgeon reviews these results to confirm your heart can safely tolerate the procedure and anesthesia. If the test identifies any abnormalities, your surgeon may recommend additional cardiac testing before surgery.

Chest X-Ray

A chest X-ray evaluates your lungs and heart size. It can detect lung disease or other conditions that affect anesthesia safety. This information allows your surgical team to plan your care more effectively. It also reduces the risk of breathing problems during surgery.

Urinalysis

A urinalysis checks for hidden urinary tract infections before surgery. If an infection is detected, your surgeon treats it before the procedure to reduce the risk of bacteria spreading to the new joint. This step protects the implant from infection after surgery. It also supports a safer recovery with fewer complications.

Who Is A Good Candidate For Knee Replacement?

You may qualify for knee replacement surgery if severe bone-on-bone arthritis continues to limit your daily activities despite conservative treatment. Your surgeon may also recommend this procedure if you are younger, active, and have no uncontrolled medical conditions or active infection. For younger patients with arthritis, robotic knee replacement surgery may provide a cementless implant with durable long-term outcomes.

What Factors Affect Your Eligibility For Knee Surgery?

The severity of joint damage, daily pain, and your overall health determine your eligibility for knee replacement surgery. Your surgeon also evaluates your body weight, previous knee infections, and medical history to confirm you can safely undergo the procedure.

Moreover, your overall fitness, mobility goals, and your surgeon’s expertise guide the final treatment decision. Beyond these medical factors, the following factors also affect your eligibility for surgery:

• Failed Nonsurgical Treatment: Your surgeon confirms that medications, injections, or other treatments no longer relieve your symptoms.
• Support at Home: Family or friends should be available to assist you during your early recovery.
• Smoking Habits: Smoking slows healing and increases the risk of infection after surgery.
• Mental Readiness: A positive attitude and realistic goals support a smoother recovery.
• Commitment to Rehabilitation: Following your exercise and rehabilitation plan improves long-term knee function and leads to better outcomes.

When Is Robotic Knee Replacement Not Recommended?

Your surgeon may not recommend robotic knee replacement surgery if you have an active joint or skin infection, or a serious medical condition that is not under control. This approach may also not be a good treatment option if the patient’s anatomy is better addressed with a traditional knee replacement or if the hospital lacks the required robotic technology.

In these situations, your surgeon recommends the safest procedure based on your condition and long-term treatment goals. Surgeons also avoid robotic knee replacement surgery if you have severe conditions, such as:

• Extreme Bone Defects: Severe bone loss limits the ability to achieve secure implant fixation.
• Vascular Disorders: Poor blood flow increases the risk of surgical complications.
• Severe Nerve Disorders: Nerve damage around the leg can affect recovery and joint function.

How Does Robotic-Assisted Knee Replacement Work?

Robot-assisted surgery uses a computer-guided robotic arm to assist your surgeon during knee replacement surgery with enhanced precision. The robot never works on its own, and your surgeon controls every step throughout the procedure. Before surgery, preoperative imaging with a CT scan or MRI creates a detailed 3D model of your knee.

Then your surgeon uses this model to select the correct implant size and plan accurate bone cuts. During surgery, the system compares your anatomy with the 3D model in real time. Small trackers attached to the leg allow the system to monitor joint alignment and ligament balance throughout the procedure.

After that, your surgeon uses the robotic arm to remove damaged bone and position the implant with greater accuracy. The system also sets safe cutting boundaries, which support a well-balanced knee and accurate implant placement.

How Long Does Robotic Knee Replacement Take?

A robotic knee replacement surgery usually takes 1 to 2 hours in the operating room. This time covers only the surgical procedure and does not include preoperative preparation, anesthesia, or your initial recovery in the hospital. The exact duration also depends on your patient’s anatomy, the complexity of the procedure, and your surgeon’s expertise.

How Is Robotic Knee Replacement Different From Traditional Surgery?

Robotic knee replacement uses a computer-guided robotic arm and 3D virtual models to assist the surgeon with millimeter-level precision. In contrast, traditional knee replacement relies on manual instruments and the surgeon’s judgment during the procedure. While both robotic-assisted and conventional knee replacements generally have excellent outcomes, here are the key differences:

Robotic Knee Replacement	Traditional Knee Replacement
CT scan with a 3D surgical plan	Standard X-rays and manual measurements
Greater precision for implant placement	Manual alignment guides
Preserves more healthy tissue	Greater tissue disruption
Higher cost due to advanced technology	Lower procedure cost
Often less pain and shorter hospital stay	Standard recovery and hospital stay

In addition, robotic knee replacement usually takes longer than traditional surgery due to system setup and surgical planning. It may also increase the overall cost of the procedure due to advanced robotic technology. However, a study published in Arthroplasty Today found that 94% of patients reported satisfaction with robotic knee replacement. In comparison, 87.4% of patients reported satisfaction after traditional knee replacement.

What Are The Benefits Of Robotic Knee Replacement?

Robotic knee replacement offers enhanced precision, more accurate implant alignment, and less pain after surgery than traditional knee replacement. It also protects healthier bone and soft tissue during the procedure. As a result, many patients experience a shorter recovery time and return to daily activities sooner.

In fact, research published by Dr. Eric Lepkowsky et al.followed 106 patients who underwent robotic-assisted knee replacement. The study found that patients who achieved their recovery goals early reported higher satisfaction at 1 and 2 years after surgery. It also showed greater improvements in pain relief, knee function, sports activities, and quality of life compared with a large national knee replacement database.

Similarly, another study published in Orthopedic Reviews compared 1,199 knee replacements performed in 1,159 patients. The review found fewer alignment outliers with robotic-assisted surgery (16%) than with traditional knee replacement (76%). It also reported fewer radiolucent lines (0% vs. 35%), which may indicate better implant fixation over time. Moreover, the review reported the following outcomes for both surgical approaches:

• Implant Survivorship: 98.3% with robotic surgery vs. 97.3% with traditional surgery.
• Complication Rate: 2.4% with robotic surgery vs. 1.4% with traditional surgery.
• Operative Time: 88 minutes with robotic surgery vs. 79 minutes with traditional surgery.

What Are The Risks Of Robotic Knee Replacement?

Infection and blood clots are the most common risks after robotic knee replacement surgery. Knee stiffness and persistent pain can also affect recovery in some patients. However, an experienced surgeon, careful follow-up, and commitment to rehabilitation lower these risks and support better outcomes.

In addition, robotic knee replacement has a few technology-related risks, such as:

Pin-Site Complications

In some cases, small pins inserted into the bone can cause minor fractures or local infections. In fact, a study published in The Journal of Arthroplasty found that pin-related complications occurred in only 1.4% of more than 7,300 robotic and computer-assisted knee procedures. Among these cases, pin fractures accounted for 81% of the reported complications. The study also reported the following common intraoperative and postoperative complications:

• Pin Dislodgement (0.6%): The tracking pin becomes loose during surgery.
• Superficial Pin-Site Infection (0.6%): A mild infection develops around the pin insertion site.

System and Technical Malfunctions

A study published in Springer reviewed 188 robotic-assisted total knee replacement procedures and found robot-related malfunctions in 17 cases (9.0%). Among these cases, technical malfunctions accounted for 41.2%, while robot malfunctions accounted for 17.6%. The study also found that 29.4% of cases required changes when the surgeon’s judgment differed from the robotic plan. However, the surgeons resolved all malfunctions during surgery without causing surgical failure.

Iatrogenic Soft Tissue Injury

In some cases, accidental soft tissue injury can occur during surgery. This risk may increase when additional hardware requires more tissue exposure or manipulation. Technical errors or differences between the surgeon’s judgment and the robotic plan can also increase the chance of tissue injury.

What Is The Recovery Timeline After Knee Replacement?

Recovery after knee replacement surgery usually takes 3 to 6 months, while full strength and tissue healing can continue for up to one year. Most patients stand and walk with assistance on the day of surgery. You can usually return home after a short hospital stay, depending on your recovery and overall health.

After discharge, your surgeon recommends a personalized exercise program to restore knee movement and strength. As recovery progresses, walking becomes easier and daily activities gradually improve. Most patients resume regular activities within 2 to 3 months, depending on their recovery. Your surgeon may also recommend supervised outpatient rehabilitation after surgery to improve strength and mobility.

What Activities Should You Avoid After Knee Surgery?

After knee surgery, you should avoid running, jumping, heavy lifting, deep squatting, and twisting on the operated leg. You should also avoid contact sports and unstable footwear, such as flip-flops or high heels, to protect the healing tissues and implant. In addition, avoid the following activities until your surgeon approves them:

• Deep Squats or Lunges: Place excessive stress on the healing knee and kneecap.
• Direct Kneeling: Avoid placing body weight on the front of the knee until your surgeon approves it.
• Heavy Household Chores: Avoid vacuuming, pushing heavy objects, or lifting more than 10 pounds during the early recovery period.
• Sitting With Crossed Legs: Increases stress on the healing joint and affects early alignment.

How Can You Recover Faster After Knee Replacement?

To ensure smooth recovery after knee replacement surgery, start walking early, control swelling with regular icing and leg elevation, and follow your surgeon’s instructions. You should also avoid strenuous activities and eat a healthy, protein-rich diet to support tissue healing. Beyond these steps, our surgeon, Dr. Eric Lepkowsky, recommends the following exercises to reduce joint stiffness and speed your return to daily activities:

• Ankle Pumps
• Heel Slides
• Quadriceps Sets
• Straight Leg Raises
• Short Walks
• Knee Bends

How Long Does A Robotic Knee Implant Last?

A robotic knee implant typically lasts 15 to 25 years or longer. Many modern implants continue to function well beyond 20 years with proper care and regular follow-up. This long lifespan is possible because robotic assistance improves surgical precision and implant alignment during surgery. Better implant alignment reduces joint wear over time and helps maximize the lifespan of the artificial knee.

Consult Dr. Eric Lepkowsky to Find Out If You Qualify for Robotic Knee Surgery!

Severe knee pain can affect your mobility, independence, and quality of life. You may avoid walking, climbing stairs, or spending time with your family because of constant pain and stiffness. At the same time, you may question whether robotic knee replacement is the right treatment for your condition.

At Total Orthopedics & Sports Medicine, Dr. Eric Lepkowsky completed advanced fellowship training in adult joint replacement under internationally recognized experts. He carefully evaluates your condition and explains your treatment options, recovery time, surgical risks, and expected benefits before recommending surgery. After your procedure, he also schedules regular follow-up visits to monitor your recovery. Call 855-321-6784 or visit our clinic in Massapequa for a surgical evaluation.

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