Knee Replacement Infection
Infection may occur shortly after surgery or appear years later. Some infections cause obvious redness or drainage, while low-grade infections may present primarily as persistent pain, stiffness or swelling.
Atlanta Knee Replacement Specialists
Painful Knee Replacement Specialist & Revision Knee Surgeon in Atlanta
A knee replacement should improve your life—not leave you with persistent pain, swelling, stiffness or instability. Our orthopedic knee specialists perform detailed evaluations to identify why a total knee replacement hurts and determine whether rehabilitation, targeted treatment or revision knee replacement may help.
Our experienced knee replacement specialists evaluate painful, loose, unstable and failed knee replacements for patients from Atlanta, Decatur, Snellville and Loganville.
Serving Atlanta and the east metro region, including DeKalb, Gwinnett,
Walton and Fulton counties.
When to See a Knee Specialist After Knee Replacement
Pain after total knee replacement can have many different causes. The location, timing and character of the pain often provide important clues, but a painful replacement should never be evaluated from symptoms alone. A knee replacement specialist may need to review properly positioned X-rays, prior operative records, laboratory testing and the stability of the implant.
Our goal is not to recommend another operation automatically.
Our first goal is to identify the source of the problem. Revision surgery should
be considered only when there is a clear diagnosis and a reasonable expectation
that correcting it will improve the knee.
Pain that never improved after the original surgery
Pain that returned months or years later
Swelling, warmth or recurrent fluid in the knee
A knee that buckles, shifts or feels unstable
Stiffness or difficulty bending and straightening
Pain around the kneecap or during stairs
Clicking, catching, grinding or mechanical symptoms
Concern about loosening, alignment or implant failure
Symptoms That Require Prompt Medical Attention
Contact a physician promptly for increasing redness, drainage, fever, chills, rapidly worsening swelling, severe new pain, an inability to bear weight or a sudden change in the position or stability of the knee. Chest pain, shortness of breath or significant calf swelling may require emergency evaluation.
Common Causes of Pain After Total Knee Replacement
A painful total knee replacement is not one diagnosis. A knee specialist must consider the implant, bone, ligaments, kneecap, tendons, nerves and surrounding soft tissues. Pain can also originate outside the knee.
2
Implant Loosening
The femoral, tibial or kneecap component may lose fixation to the bone. Loosening can cause pain with standing, walking, starting movement or increased activity.
3
Knee Replacement Instability
A knee replacement may feel loose from side to side or shift during flexion. Patients may describe buckling, distrust of the knee, recurrent swelling or difficulty walking on uneven ground.
4
Alignment or Rotation Problems
Component position influences ligament balance, kneecap tracking and how forces pass through the knee. Malposition may contribute to pain, stiffness, instability or abnormal wear.
5
Kneecap Problems
Pain may originate from the patella, patellar implant, extensor mechanism or abnormal tracking of the kneecap. Symptoms are often noticeable during stairs, rising from a chair or deep flexion.
6
Stiffness and Scar Tissue
Excessive scar formation, implant position, pain, swelling or an untreated mechanical problem may limit motion. Treatment depends on how long the stiffness has been present and what is causing it.
7
Polyethylene Wear
A plastic polyethylene bearing sits between the metal components. Over time, wear or damage may lead to inflammation, instability, bone loss or implant failure.
8
Fracture or Bone Loss
A fracture can occur around a knee replacement after a fall or because the surrounding bone has weakened. Bone loss may also develop from loosening, wear debris or previous surgery.
9
Pain From Outside the Knee
Hip arthritis, lumbar spine disease, nerve irritation, vascular conditions, tendon problems and other sources can mimic pain from a knee replacement.
How Our Atlanta Knee Specialists Evaluate a Painful Knee Replacement
Revision decisions should not be based on a single X-ray or isolated symptom. Our knee replacement specialists approach the knee systematically and connect the patient’s symptoms, examination and diagnostic findings.
Understand the Timeline and Pain Pattern
We ask whether the knee ever improved, when the pain began, where it hurts, what activities trigger it and whether there is swelling, stiffness, instability, rest pain or night pain.
Review the Original Knee Replacement Operation
When available, we review the operative report, implant stickers, prior imaging, rehabilitation records, previous cultures and laboratory results. Knowing the exact implant system can be important when planning treatment.
Perform a Focused Knee Specialist Examination
The evaluation includes gait, alignment, range of motion, ligament stability, kneecap tracking, tenderness, strength, swelling, hip motion, neurologic findings and the condition of the surrounding soft tissues.
Obtain Properly Positioned X-Rays
Standing and specialized knee replacement views may show component alignment, fixation, joint-line position, bone loss, fractures, polyethylene wear, kneecap tracking or progressive changes compared with prior imaging.
Screen Carefully for Knee Replacement Infection
Blood tests may be ordered when infection is a concern. Depending on the clinical situation, fluid may be aspirated from the knee for cell count, differential, cultures and additional testing.
Use Advanced Testing Selectively
CT imaging, bone scans, specialized imaging or other studies may be helpful when evaluating implant rotation, occult loosening, fracture, bone loss or referred pain. Not every patient requires every test.
What a Total Knee Replacement Is—and Why the Details Matter
A total knee replacement resurfaces the damaged ends of the femur and tibia with prosthetic components. A polyethylene bearing sits between those components, and the undersurface of the kneecap may also be resurfaced. The goal is to create a stable, well-balanced knee with appropriate alignment, rotation and tracking.
Knee replacements are not simply two pieces of metal. Component size and position, ligament tension, the level of the joint line, the condition of the kneecap, fixation to bone and the quality of the polyethylene all influence how the knee functions.
A
Alignment and Rotation
The femoral and tibial components must work together through the complete arc of motion. Alignment or rotational errors can affect ligament balance, kneecap tracking, flexion and load distribution.
B
Fixation to Bone
Components may be fixed with bone cement or with cementless surfaces designed for bone ingrowth. Either method can work well when selected and performed appropriately.
C
Polyethylene Bearing
The plastic insert functions as the bearing surface between the metal components. Its thickness, stability, wear pattern and compatibility with the existing implant may become important during revision planning.
D
Implant Materials
Standard metal alloys, specialized surface technologies and alternative materials may be considered based on implant requirements, bone quality, prior reactions and the specific revision problem.
Many well-positioned knee replacements function for decades. Implant longevity,
however, varies with fixation, alignment, activity, bone quality, infection,
instability and bearing wear. Persistent pain does not automatically mean the
implant has worn out.
Does Every Painful Knee Replacement Require Revision Surgery?
No. An experienced knee specialist should determine whether the pain is truly coming from the replacement before recommending another operation. Some problems improve without revision surgery, particularly when the implant is stable, infection has been excluded and the symptoms come from weakness, tendons, the spine, the hip or another non-implant source.
Nonoperative Treatment May Include
Targeted physical therapy and strengthening
Gait, balance and flexibility training
Treatment of hip, spine or nerve-related pain
Activity modification and weight management
Medication when medically appropriate
Repeat clinical or X-ray evaluation
Revision Knee Replacement May Be Considered For
Confirmed implant loosening
Significant instability or ligament imbalance
Component malposition with matching symptoms
Prosthetic joint infection
Polyethylene failure or progressive wear
Fracture, bone loss or mechanical implant failure
Revision surgery performed without a clearly identified cause of pain can leave
the patient with the same symptoms. Establishing the diagnosis before surgery is
one of the most important parts of successful revision knee care.
What Is Revision Total Knee Replacement?
Revision knee replacement is an operation in which one or more parts of an existing knee replacement are removed, repaired or replaced. Some revisions involve exchanging only the polyethylene bearing or a single component. More complex cases may require removal of the entire implant, reconstruction of bone loss and use of stems, augments, cones or a more constrained prosthesis.
Revision knee surgery is generally more complex than the original replacement. Scar tissue, altered anatomy, bone loss, ligament damage and the need to remove existing components must all be managed carefully.
I
Limited Revision
In selected cases, only the polyethylene insert, kneecap component or one portion of the replacement requires treatment.
II
Full Component Revision
Both the femoral and tibial components may need to be removed and replaced when there is loosening, malposition, instability or extensive wear.
III
Complex Reconstruction
Severe bone loss, ligament deficiency, fracture or multiple prior operations may require specialized fixation and a higher level of implant constraint.
How Knee Replacement Infection May Be Treated
Infection requires a different strategy from aseptic loosening or instability. Treatment depends on the organism, duration of symptoms, implant stability, condition of the soft tissues, patient health and prior operations.
Debridement With Implant Retention
In selected acute infections, the knee may be surgically cleaned, modular components exchanged and antibiotics administered while retaining well-fixed major components.
Staged Revision Knee Replacement
Some infections require removal of the components, placement of an antibiotic spacer, targeted antibiotic treatment and later reconstruction after the infection has been addressed.
A Replaced Knee Should Be Evaluated Before an Injection
A painful knee replacement should first be investigated for infection and mechanical failure. Treatments routinely used for an arthritic natural knee may not be appropriate for a prosthetic joint.
Preparing for Your Knee Specialist Consultation
You may still be evaluated even when every record is not available. Bringing the following information can make the consultation more efficient and may help your knee replacement specialist identify the implant and previous treatment.
Original knee replacement operative report
Implant identification card or implant stickers
Prior and recent knee X-rays
Hospital discharge and rehabilitation records
Previous blood test and aspiration results
Culture reports and antibiotic history
Records from any manipulation or revision procedure
Current medications and medical conditions
It is especially helpful to know the date of the original knee replacement,
whether the knee ever became pain-free, the location of the pain and what
symptoms have changed over time.
Experienced Evaluation Without Automatically Blaming the Implant
A successful evaluation requires more than looking for a loose component. Our Atlanta knee specialists assess the implant, alignment, rotation, fixation, ligaments, kneecap, surrounding tendons, bone quality and possible sources outside the knee.
When revision surgery is appropriate, the attending orthopedic surgeon is directly involved in the operation and treatment plan.
Detailed review of prior surgery
Standing and specialized implant X-rays
Infection testing when indicated
Evaluation of alignment and stability
Personalized revision planning
Painful Knee Replacement and Knee Specialist Care Near Atlanta
Atlanta Bone & Joint Specialists evaluates painful and failed total knee replacements for patients from Atlanta and throughout the east metro region. Our knee specialists see patients at offices in Decatur, Snellville and Loganville, providing convenient access for patients in DeKalb County, Gwinnett County, Walton County, Fulton County and surrounding communities.
Patients may request an initial knee specialist evaluation, a second opinion before revision surgery or an independent review when they have been told their X-rays look normal despite continued pain.
Frequently Asked Questions About Pain After Knee Replacement
Is it normal for a knee replacement to hurt?
Pain, swelling and stiffness are expected during early recovery, but the overall trend should generally be toward improvement. Persistent severe pain, worsening symptoms, recurrent swelling, instability or pain that returns after a period of good function deserves further evaluation.
Why does my knee replacement hurt even though my X-rays look normal?
Standard X-rays may not show every cause of pain. Instability, subtle rotational problems, low-grade infection, soft-tissue irritation, kneecap dysfunction and pain from the hip or spine may require additional examination or testing by a knee specialist.
Can a knee replacement become loose?
Yes. The bond between the implant and bone can weaken over time or fail for mechanical or biologic reasons. Symptoms vary, and loosening should be confirmed by combining the examination with current and prior imaging.
Can a knee replacement become infected years later?
Yes. Infection may occur early after surgery or develop later. Some infections are obvious, while others cause only pain, stiffness or swelling. Laboratory tests and aspiration may be needed when infection is suspected.
Can knee replacement instability be repaired?
Treatment depends on the cause and severity. Therapy or bracing may help selected patients, but significant ligament imbalance, component position problems or polyethylene issues may require revision surgery.
Can only the plastic insert be exchanged?
Sometimes. An isolated polyethylene exchange is appropriate only when the major components are well fixed, properly positioned and compatible with the planned insert, and when exchanging the bearing will address the actual mechanical problem.
Will revision knee replacement eliminate all pain?
No operation can guarantee a pain-free knee. Outcomes are generally more predictable when the source of pain has been clearly identified and can be corrected surgically.
Should I see a knee specialist before revision knee surgery?
Yes. Revision surgery can be complex and may require specialized implants and reconstruction. A knee replacement specialist can help confirm the diagnosis, review alternatives and clarify the expected benefits and limitations of surgery.
Get Answers From an Atlanta Knee Replacement Specialist
Persistent pain after total knee replacement should not be dismissed. Schedule an evaluation with a knee specialist at Atlanta Bone & Joint Specialists in Decatur, Snellville or Loganville to determine what may be causing your symptoms and what treatment options are available.