Maquet procedure Introduction (What it is)
Maquet procedure is a knee operation that repositions the tibial tubercle, the bony bump where the patellar tendon attaches.
Its goal is to change how the kneecap (patella) loads against the thighbone (femur).
It is most commonly discussed in the setting of patellofemoral pain or patellofemoral arthritis (kneecap joint wear).
In modern practice, it is often considered within the broader family of “tibial tubercle osteotomy/transfer” procedures.
Why Maquet procedure used (Purpose / benefits)
The Maquet procedure is designed to reduce stress on the patellofemoral joint—the contact area between the patella and the femur. In many knee conditions, pain comes from irritated or worn cartilage behind the kneecap, abnormal tracking of the patella, or both. By moving the tibial tubercle forward (anteriorly), the line of pull of the patellar tendon is altered, which can reduce compressive forces at the patellofemoral joint during activities like stairs, squatting, or rising from a chair.
At a high level, the intended benefits include:
- Pain reduction when pain is primarily generated from the patellofemoral compartment.
- Improved function by making common daily movements more tolerable.
- Load redistribution across patellofemoral cartilage, which may be helpful when damage is localized or concentrated in certain areas.
- Alignment and tracking optimization in selected cases where patellar mechanics contribute to symptoms (though other tibial tubercle procedures may be preferred depending on the specific maltracking pattern).
It is important to note that the procedure aims to address biomechanics and load rather than directly “healing” cartilage. Whether it helps, and for how long, varies by clinician and case.
Indications (When orthopedic clinicians use it)
Orthopedic clinicians may consider a Maquet procedure (or a related tibial tubercle osteotomy concept) in situations such as:
- Patellofemoral pain that is strongly activity-related and linked to patellofemoral joint overload
- Patellofemoral osteoarthritis (arthritis mainly behind the kneecap) when symptoms correlate with that compartment
- Focal cartilage damage (chondral lesions) of the patella or trochlea where unloading may be part of the strategy
- Failed nonoperative management (for example, persistent symptoms despite appropriate rehabilitation and activity modification), when surgery is being considered
- Selected cases where patellar mechanics contribute to symptoms and a tubercle transfer is part of the surgical plan
- Situations where patellofemoral symptoms dominate more than tibiofemoral (main knee joint) symptoms
Contraindications / when it’s NOT ideal
A Maquet procedure is not appropriate for every type of knee pain or arthritis pattern. Scenarios where it may be less suitable, or where another approach may be favored, include:
- Predominant tibiofemoral arthritis (medial or lateral compartment arthritis) rather than patellofemoral disease
- Inflammatory or systemic arthropathies where pain drivers and joint involvement are more diffuse (varies by clinician and case)
- Marked knee stiffness, limited motion, or significant contractures that complicate postoperative rehabilitation
- Active infection or concern for infection around the knee
- Poor bone quality or medical factors that significantly impair bone healing (risk assessment varies by clinician and case)
- Uncorrected major malalignment patterns where a different osteotomy or alignment procedure may address the primary problem more directly
- Instability patterns (for example, recurrent patellar dislocation) where a different tibial tubercle direction change and/or soft-tissue stabilization may be required (procedure selection varies by clinician and case)
How it works (Mechanism / physiology)
Biomechanical principle
The Maquet procedure is classically described as anterior advancement of the tibial tubercle. The tibial tubercle is the bony attachment site of the patellar tendon on the tibia (shinbone). Moving this attachment forward changes the force vector through the extensor mechanism (quadriceps → patella → patellar tendon → tibia). In simplified terms, this can reduce the compressive contact force between the patella and the femur during knee flexion, which is often when patellofemoral pain is most noticeable.
Relevant knee anatomy
Key structures involved include:
- Patella (kneecap): A sesamoid bone embedded in the tendon system of the quadriceps.
- Trochlea of the femur: The groove on the femur where the patella glides.
- Patellar tendon: Connects the patella to the tibial tubercle and transmits quadriceps force to extend the knee.
- Tibial tubercle: The bony prominence on the tibia where the patellar tendon inserts; this is the structure that is surgically repositioned.
- Articular cartilage: The smooth tissue covering the patella and trochlea; cartilage wear here is central in patellofemoral arthritis or chondromalacia.
The meniscus and the major knee ligaments (ACL/PCL/MCL/LCL) are not the primary targets of the Maquet procedure, although overall knee stability and coexisting injuries matter when planning any knee surgery.
Onset, duration, and reversibility
The intended effect is mechanical and begins once the bone position is changed and stabilized. However, the functional benefit typically depends on bone healing, soft-tissue recovery, and rehabilitation progress, so timing varies by clinician and case. Because it involves an osteotomy (a controlled bone cut), it is not readily reversible in the way an injection or brace is; revision or conversion to another procedure may be possible if needed, but that is a separate surgical decision.
Maquet procedure Procedure overview (How it’s applied)
The Maquet procedure is a surgical operation. Exact steps, fixation methods, and postoperative plans differ among surgeons and institutions, but the overall workflow commonly includes:
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Evaluation and exam
A clinician reviews symptoms (location, triggers like stairs/squats), examines patellar tracking, and assesses alignment, motion, and signs suggesting other pain sources. -
Imaging and diagnostics
Knee X-rays are commonly used to evaluate arthritis patterns and alignment. MRI may be used to assess cartilage condition and other structures (meniscus, ligaments) when clinically relevant. -
Preoperative planning
The surgeon determines whether unloading the patellofemoral joint via tibial tubercle anteriorization matches the problem pattern. Planning may also consider any combined procedures (for example, cartilage procedures or other realignment). -
Intervention (surgery)
In general terms, the tibial tubercle is cut in a controlled fashion (osteotomy), moved forward to a planned position, and stabilized with fixation. Some techniques use a bone graft or spacer to maintain the new position; details vary by clinician and case. -
Immediate checks
The surgical team verifies fixation stability and knee motion within expected limits. Postoperative imaging may be used to confirm alignment and hardware position, depending on routine practice. -
Follow-up and rehabilitation
Follow-up visits monitor wound healing, pain control, range of motion, and bone healing on imaging. Rehabilitation focuses on restoring motion and rebuilding quadriceps strength while respecting bone healing and surgeon-specific precautions.
Types / variations
In clinical conversation, “Maquet procedure” is often grouped with other tibial tubercle osteotomy (TTO) techniques. Common variations and related concepts include:
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Classic Maquet anteriorization
Primarily advances the tibial tubercle forward to reduce patellofemoral joint compression. Some descriptions include using a wedge or graft to maintain the anteriorized position. -
Modified anteriorization techniques
Modern practice may adjust the cut shape and fixation method (for example, different screw configurations or plates). Specific implants and constructs vary by material and manufacturer. -
Anteromedialization (related but distinct concept)
Some tibial tubercle transfers move the tubercle both forward and inward (medially) to influence both load and tracking. These are commonly discussed under different named procedures and are selected based on the patient’s tracking pattern and cartilage wear location. -
Distalization or proximalization (less Maquet-specific)
In some patients, the tubercle is moved up or down to address patellar height issues. This is typically considered separately from pure Maquet-style anteriorization. -
Combined procedures
A tibial tubercle procedure may be performed alongside cartilage restoration procedures, arthroscopy for evaluation/treatment, or soft-tissue balancing procedures when multiple factors contribute to symptoms. Whether combining procedures is appropriate varies by clinician and case.
Pros and cons
Pros:
- Can reduce patellofemoral joint loading by changing extensor mechanism biomechanics
- Targets pain generators localized to the patellofemoral compartment in selected patients
- Uses the patient’s own bone and tendon attachment rather than replacing the joint
- May be combined with other knee procedures when multiple issues are present
- Provides a structural, mechanical solution when nonoperative options have not met goals
- Aligns treatment with a defined anatomical problem (tibial tubercle position and patellofemoral mechanics)
Cons:
- It is an osteotomy, so bone healing is required and recovery can be substantial
- Risks include nonunion/delayed union, fracture, or loss of fixation (risk varies by clinician and case)
- Hardware irritation or discomfort can occur, sometimes leading to later hardware removal
- Not all patellofemoral pain is driven by overload that improves with anteriorization
- Outcomes can be limited if arthritis is widespread or if pain sources are multifactorial
- Surgical risks (infection, stiffness, blood clots, anesthetic risks) apply as with other orthopedic operations
Aftercare & longevity
Aftercare following a Maquet procedure generally focuses on protecting the osteotomy while restoring knee function. The exact plan differs by surgeon, fixation method, and the procedures done at the same time.
Factors that commonly affect outcomes and longevity include:
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Severity and location of cartilage damage
Localized patellofemoral wear may behave differently than advanced, diffuse arthritis. -
Bone healing and fixation stability
Because the tibial tubercle is repositioned, the long-term result depends on the bone healing in the intended position. Healing timelines vary by clinician and case. -
Rehabilitation participation and progression
Recovery typically involves regaining motion, gradually rebuilding quadriceps strength, and retraining functional movements. The pace often depends on weight-bearing status and healing. -
Weight-bearing and activity demands
Postoperative restrictions and later return-to-activity plans vary. Higher-impact demands may stress the patellofemoral joint and the surgical construct differently than low-impact activities. -
Overall alignment and coexisting conditions
Hip strength, foot mechanics, knee alignment, ligament stability, and other joint issues can influence symptoms even after a technically successful realignment. -
Comorbidities that affect recovery
Smoking status, metabolic health, and other medical factors can affect bone healing and soft-tissue recovery; the impact is individualized. -
Bracing and follow-up monitoring
Some protocols use a brace early on, and follow-up imaging may be used to monitor healing. Practices vary by clinician and case.
Longevity of symptom relief can vary widely. Some patients may experience durable improvement, while others may have recurring symptoms if arthritis progresses or if the original pain source was not primarily patellofemoral overload.
Alternatives / comparisons
The Maquet procedure is one option within a broad set of treatments for anterior knee pain and patellofemoral arthritis. Common alternatives and comparisons include:
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Observation and activity modification
For mild symptoms or fluctuating pain, monitoring and adjusting aggravating activities may be considered before surgery. This does not change joint structure but may reduce symptom triggers. -
Physical therapy and targeted strengthening
Rehabilitation often focuses on quadriceps strength, hip and core control, flexibility, and movement mechanics. For many people with patellofemoral pain, this is a first-line approach because it can improve tracking and load tolerance without surgery. -
Medications
Oral or topical anti-inflammatory medications may reduce pain and inflammation for some patients. They address symptoms rather than biomechanics and may not be appropriate for all medical histories. -
Bracing or taping
Patellofemoral braces or taping methods can sometimes improve symptoms by influencing tracking or reducing perceived pain. Effects can be variable and are typically temporary while worn. -
Injections
Injections may be used for symptom management in arthritis or inflammatory flares. The choice of injection type depends on diagnosis and clinician preference, and results can be variable. -
Arthroscopy (selected situations)
Arthroscopy may be used to evaluate or treat specific intra-articular problems, but its role in isolated degenerative patellofemoral arthritis is debated and depends on the specific pathology. -
Other realignment surgeries
When maltracking or instability is a major driver, other tibial tubercle transfers (with medialization, distalization) and/or soft-tissue stabilization procedures may be considered instead of pure Maquet-style anteriorization. -
Patellofemoral joint replacement or total knee arthroplasty
For advanced arthritis, joint replacement options may be discussed. These replace joint surfaces rather than changing tendon attachment mechanics, and the appropriate choice depends on which compartments are affected and patient-specific factors.
Maquet procedure Common questions (FAQ)
Q: Is the Maquet procedure the same as a tibial tubercle osteotomy?
Maquet procedure is commonly considered a type of tibial tubercle osteotomy/transfer, specifically focusing on anterior advancement. In practice, clinicians may use broader terms like “tibial tubercle osteotomy” and then specify the direction of transfer. Naming can vary by surgeon and region.
Q: What knee problem does it target most directly?
It most directly targets pain and overload arising from the patellofemoral joint (the kneecap and the groove it rides in). The concept is to reduce compressive forces at that joint by changing the pull of the patellar tendon. It is not primarily meant to treat meniscus tears or ligament injuries.
Q: How painful is the recovery?
Pain experiences vary by clinician and case, as well as by individual pain sensitivity and the extent of surgery performed. Because it involves a bone cut and fixation, early postoperative discomfort is expected. Pain management strategies and rehabilitation pacing are individualized by the treating team.
Q: What type of anesthesia is typically used?
This is generally performed under anesthesia appropriate for orthopedic surgery, often including general anesthesia and sometimes regional nerve blocks. The exact approach depends on patient factors, anesthesiologist preference, and institutional protocols. Clinicians discuss anesthesia options during preoperative assessment.
Q: How long do results last?
There is no single duration that applies to everyone. Symptom relief can be long-lasting in some patients, while others may have recurrence if arthritis progresses or if other pain generators remain. Longevity depends on cartilage status, alignment, activity demands, and rehabilitation, among other factors.
Q: Is it considered safe?
Like all surgeries, it carries risks, including infection, blood clots, stiffness, and complications related to bone healing or fixation. Safety depends on overall health, surgical technique, and postoperative care. Risk assessment is individualized and discussed as part of informed consent.
Q: When can someone return to work or driving after a Maquet procedure?
Timing varies based on which leg was operated on, pain control, mobility, weight-bearing status, and job demands. Sedating pain medications and limited leg control can affect driving readiness. Clinicians typically provide activity clearance based on functional milestones and safety considerations.
Q: Will I be allowed to put weight on the leg right away?
Weight-bearing plans vary by surgeon, fixation method, and whether other procedures were performed at the same time. Because bone healing is part of the operation, some period of protection is commonly used. Your treating team determines the progression based on healing and stability checks.
Q: Does the procedure require screws or plates, and do they need to be removed later?
Fixation often uses screws and sometimes a plate, depending on technique and surgeon preference. Hardware may remain permanently if it is not bothersome, but some patients experience irritation that leads to later removal. Whether removal is needed varies by clinician and case.