Hip Replacement Expert Witness

Hip replacement cases often become disputes about why an operation failed to produce the expected result. The answer may involve surgical technique, component position, infection, instability, nerve injury, fracture, implant wear, or a condition that was never caused by the replacement at all.

That makes these cases highly dependent on the details. Persistent pain after total hip arthroplasty is not a diagnosis. Neither is revision surgery. An expert has to determine what actually went wrong, whether it was preventable, and whether the claimed problem can be tied to the care being challenged.

For most hip replacement cases, the strongest expert is an orthopedic surgeon whose current practice includes total hip arthroplasty and, when relevant, revision joint replacement. Broader hip procedure issues, including fracture fixation and arthroscopy, are covered on our hip surgery expert witness page.

When Total Hip Replacement Is Appropriate

The first question in some cases is whether the patient should have undergone hip replacement in the first place.

Total hip arthroplasty is commonly performed for severe osteoarthritis, but it may also be used for avascular necrosis, certain hip fractures, inflammatory arthritis, and other conditions that significantly damage the joint.

An expert reviewing the decision to operate may consider the patient's pain, functional limitations, physical examination, imaging, prior treatment, age, activity level, and overall health. The extent of radiographic disease matters, but imaging alone does not determine whether replacement is appropriate.

The analysis should focus on whether surgery was a reasonable option based on the patient's actual symptoms and clinical condition at the time.

Component Positioning

Hip replacement requires positioning both the acetabular and femoral components in a way that produces a stable, functional joint.

Litigation may involve allegations that the acetabular cup was excessively inclined or anteverted, that the femoral stem was improperly positioned, or that the relationship between the components contributed to instability, impingement, accelerated wear, or other complications.

Component position is usually evaluated through postoperative imaging along with the patient's symptoms and clinical course. In some cases, CT imaging may provide additional information about component orientation.

Measurements should not be viewed in isolation. A component outside a commonly cited range does not automatically establish negligence, and a component within a particular range does not guarantee that instability cannot occur.

The expert should explain whether the position was clinically significant in that patient and whether it actually contributed to the claimed outcome. For how qualification attaches to the specific opinion, see qualifying an expert witness.

Dislocation After Hip Replacement

Dislocation is one of the better-known complications of total hip arthroplasty.

A single dislocation can occur even after an appropriately performed procedure. Recurrent dislocation, however, may lead to closer scrutiny of component orientation, soft tissue tension, surgical approach, impingement, patient compliance, muscle weakness, or other factors affecting stability.

The circumstances of each dislocation matter. A traumatic event shortly after surgery may have a different significance from repeated episodes during routine activity.

An expert may review postoperative radiographs, CT imaging, operative records, reduction records, and later revision findings to determine why the hip became unstable and whether the original procedure contributed.

Leg Length After Hip Replacement

Leg length discrepancy is a recurring issue in hip replacement cases because the surgeon must balance limb length with joint stability and appropriate soft tissue tension.

A patient may perceive one leg as longer even when radiographic measurements show little true difference. Pelvic tilt, scoliosis, contractures, spinal disease, and changes in gait can all create an apparent discrepancy.

When a true difference exists, the expert may evaluate its magnitude, whether it was present before surgery, why length was changed during the procedure, and whether the result falls within an acceptable range.

In some cases, modest lengthening may be necessary to produce a stable hip. The existence of a postoperative discrepancy therefore does not by itself establish improper surgery.

Nerve Injury and Foot Drop

Nerve injury after hip replacement can produce weakness, numbness, neuropathic pain, or foot drop.

The sciatic nerve is particularly relevant, although other nerves may also be affected depending on the surgical approach and mechanism. Potential causes include traction, direct injury, compression, hematoma, limb lengthening, retractor placement, or postoperative swelling.

An expert reviewing a nerve injury case may consider when the deficit first appeared, how severe it was, whether the operative record documents any complication, and whether later imaging or electrodiagnostic testing identifies the location of injury.

Some nerve injuries occur despite appropriate care. The analysis should distinguish a recognized surgical complication from evidence suggesting avoidable trauma or delayed recognition. A neurology expert may be helpful when the extent and location of the nerve injury are disputed.

Periprosthetic Joint Infection

Infection after total hip replacement can transform a routine arthroplasty into a prolonged course of additional procedures, antibiotics, and functional loss.

A periprosthetic joint infection may present soon after surgery or become apparent much later. Symptoms can include persistent wound drainage, pain, fever, swelling, loosening, or more subtle signs in chronic cases.

The expert may evaluate whether the infection was recognized appropriately, whether diagnostic testing was performed, how aspiration and culture results were interpreted, and whether the treatment strategy matched the clinical situation.

Management can include debridement with retention of the components, staged revision, selected single-stage procedures, or other approaches depending on the organism, timing, implant stability, soft tissue condition, and patient factors.

An adult reconstruction surgeon may address the surgical decisions, while an infectious disease physician may be needed when antibiotic selection and duration are disputed. For when that split is necessary, see when your case needs two expert witnesses.

Periprosthetic Fracture

Fractures around a hip replacement may occur during the original operation or after surgery.

An intraoperative fracture may happen during preparation or implant insertion, particularly in patients with poor bone quality or difficult anatomy. The legal question may be whether the fracture was recognized and managed appropriately rather than whether it occurred at all.

Later periprosthetic fractures are often associated with trauma and require evaluation of both the fracture pattern and the stability of the existing implant.

Treatment can range from fixation to revision of the femoral component. The appropriate approach depends on the location of the fracture, implant stability, available bone stock, and overall condition of the patient.

Persistent Pain After Hip Replacement

Persistent pain is one of the least specific findings in hip replacement litigation.

The source may be loosening, infection, instability, fracture, tendon irritation, impingement, nerve injury, adverse tissue reaction, spinal pathology, or another musculoskeletal condition. In some patients, no single structural explanation is found.

An expert should evaluate whether the workup for ongoing pain was appropriate and whether the claimed surgical problem is actually supported by objective evidence.

This distinction is important because a technically satisfactory hip replacement can still be followed by persistent symptoms. A defensible opinion should identify the mechanism causing the pain rather than assume the replacement itself is responsible.

Implant Loosening and Wear

Hip replacement components can loosen over time, particularly after years of use.

The expert may need to determine whether loosening represents expected long-term wear, failure of fixation, infection, osteolysis, component position, or another process.

The timeline matters. A component that becomes loose after many years raises different questions from one showing signs of early migration or failure shortly after implantation.

Serial radiographs can help establish when changes began and whether they progressed. Revision findings may provide additional evidence regarding fixation, bone loss, wear, and the condition of the implant.

Metallosis and Adverse Local Tissue Reactions

Some hip replacement cases involve concerns about metal wear debris or elevated metal ion levels.

These issues received particular attention with certain metal-on-metal hip systems, although metal-related problems can arise in other implant configurations as well.

The expert may evaluate implant design, component position, corrosion, wear, imaging findings, laboratory results, local tissue damage, and the reason revision was recommended.

The orthopedic issues should be kept separate from allegations involving product design or manufacturing. A surgeon can explain the clinical failure and treatment, while an engineering or medical device expert may be needed to address whether the implant itself was defective.

Revision Total Hip Arthroplasty

Revision surgery is performed for a reason, but that reason is not always negligence.

Common indications include recurrent instability, infection, loosening, wear, fracture, component malposition, or failure of a previous reconstruction.

Revision cases should begin with identifying why the original implant was removed or altered. The revision operative report can be particularly important because the surgeon may directly document component stability, tissue condition, bone loss, infection, or mechanical abnormalities.

A revision does not automatically prove that the primary procedure was performed incorrectly. The expert should determine whether the revision findings actually support the claimed defect in the original care.

Hip Replacement After Femoral Neck Fracture

Some hip replacements are performed after displaced femoral neck fractures rather than elective treatment of arthritis.

These cases involve different decision-making because the surgeon may be choosing between internal fixation, hemiarthroplasty, and total hip replacement in the setting of an acute injury.

Age, preinjury function, cognitive status, fracture displacement, bone quality, medical comorbidities, and expected activity level may all influence the treatment decision.

The expert should evaluate the operation in the context of the fracture patient rather than applying standards developed primarily for elective arthritis surgery.

Surgical Approach and Standard of Care

Hip replacement can be performed through several surgical approaches.

Anterior, posterior, lateral, and other approaches each have advantages, disadvantages, and characteristic complication profiles. The selection of one recognized approach over another is generally not enough to establish a departure from the standard of care.

Litigation may instead focus on whether the selected approach was performed appropriately and whether the complication being claimed is consistent with a technical problem.

An expert should avoid treating personal preference as the standard of care. The relevant question is whether the surgeon's management fell within acceptable orthopedic practice.

Causation in Hip Replacement Cases

Patients undergoing hip replacement frequently have significant preexisting orthopedic disease.

Arthritis, prior trauma, spinal disease, previous hip surgery, muscle weakness, osteoporosis, obesity, and other conditions can affect both surgical risk and postoperative recovery.

A causation analysis should establish the patient's baseline condition and then determine what changed after surgery. Persistent limitation may reflect a complication of the replacement, but it may also result from disease that existed before the procedure or from an unrelated condition.

The strongest opinions connect the claimed injury to objective findings, imaging, operative evidence, and the progression documented in the medical record.

Records Reviewed in Hip Replacement Litigation

Hip replacement review is often driven by serial imaging.

Preoperative radiographs establish the condition of the joint and may show leg length, deformity, or prior hardware. Immediate postoperative films provide a baseline for component position. Later studies can show migration, loosening, wear, fracture, dislocation, or other changes.

Operative reports, implant records, rehabilitation notes, aspiration results, laboratory studies, revision reports, and prior orthopedic records complete the clinical picture.

When component orientation, loosening, fracture, or implant failure is disputed, the actual images should generally be reviewed rather than relying only on the radiology report. Radiology may be needed when imaging interpretation itself is contested. Related orthopedic issues are also covered in our orthopedic surgery expert witness overview.

Choosing the Right Hip Replacement Expert

Most hip replacement disputes are best reviewed by an orthopedic surgeon with an active arthroplasty practice.

When revision surgery is central to the case, an adult reconstruction specialist who routinely performs complex revision procedures may be especially valuable. Additional experts may be appropriate when the dispute involves infection, nerve injury, vascular injury, rehabilitation, or an alleged defect in the implant itself. Related knee arthroplasty issues are covered on our knee surgery expert witness page.

The key distinction is between being qualified to discuss orthopedic surgery generally and having current experience with the exact procedure and complication under review. Start an expert witness search when you are ready to retain.