APPOINTMENT
FREN

ANTERIOR CRUCIATE LIGAMENT

A ruptured anterior cruciate ligament is a challenge, not a tragedy.
Solutions exist to regain stability and confidence.

THE anterior cruciate ligament (ACL) is an essential ligament of the knee. It connects the femur to the tibia and plays a key role in the stability of the joint, preventing the tibia from sliding forward and controlling rotational movements.

An ACL injury most often occurs during a sudden movement, pivot, rapid change of direction, or landing from a jump, particularly during sports activities. It can cause immediate pain, rapid swelling of the knee, and a feeling of instability.

Any suspected anterior cruciate ligament injury requires prompt medical evaluation to establish an accurate diagnosis and determine the appropriate treatment plan. Early intervention helps preserve knee function, minimize complications, and optimize treatment, whether conservative or surgical.

THE anterior cruciate ligament (ACL) is a key element in knee stability. It connects the femur to the tibia, prevents the tibia from sliding forward, and controls rotational movements.

This injury often occurs during a pivot or sudden change of direction, particularly in sports. It causes immediate pain, rapid swelling, and a feeling of instability, warranting prompt medical evaluation.

EVERYTHING YOU NEED TO KNOW ABOUT
THE LIGAMENT
ANTERIOR CRUCIATE

10 Frequently Asked Questions

What is the anterior cruciate ligament?

The anterior cruciate ligament, or ACL, is a central ligament located inside the knee that connects the femur to the tibia and crosses over the posterior cruciate ligament. It plays a crucial role in joint stability, particularly during dynamic movements, as it prevents the tibia from sliding forward while controlling knee rotation. When it no longer functions properly, the knee becomes mechanically unstable, which can hinder walking, sports activities, and certain everyday movements.

Where exactly is the anterior cruciate ligament located?

The anterior cruciate ligament (ACL) is located in the center of the knee joint, deeply embedded within the joint, making it invisible and imperceptible externally. It crosses the knee diagonally and occupies a strategic position that allows it to stabilize the joint in multiple directions during movement. This particular location also explains why it heals poorly spontaneously, as the surrounding joint environment does not promote natural repair. When it is torn, the overall balance of the knee is disrupted, which can lead to excessive stress on other joint structures.

What is the precise role of the anterior cruciate ligament?

The ACL primarily prevents the tibia from moving excessively forward relative to the femur and also helps control knee rotation. It is involved in every step but becomes particularly important during more intense exertion or rapid changes of direction. Its action is coordinated with the thigh muscles to effectively stabilize the joint, while also helping to protect the menisci and cartilage. When this ligament fails to perform its function, the knee can sometimes suddenly give way, demonstrating how essential its role is in ensuring the joint's functional stability.

Why is it so important in sports?

In sports, the knee is subjected to significant stress, as acceleration, braking, and pivoting put considerable strain on the anterior cruciate ligament (ACL). This ligament plays a key role in ensuring stable technique and maintaining knee control during rapid movements. When it is torn, joint control is impaired, and movements become less precise and sometimes risky. Continuing athletic activity with an unstable knee can then lead to further injuries, which explains why an ACL tear is often incompatible with playing sports without appropriate treatment.

Which sports pose the greatest risk of ACL rupture?

Pivoting sports are most affected, particularly football, skiing, basketball, handball, and rugby, as these disciplines involve rapid changes of direction that significantly increase the stress on the knee. Landings from jumps also pose a risk to the anterior cruciate ligament (ACL). This risk exists for both professional and amateur athletes, and insufficient physical preparation can further increase it, while the playing surface and equipment used can also influence the occurrence of this type of injury.

How does an ACL rupture occur?

An anterior cruciate ligament (ACL) rupture most often occurs without direct contact with another player and generally involves a mechanism combining a sudden pivot while the foot remains planted on the ground. In this situation, the knee undergoes excessive rotation, placing significant stress on the ligament. A poorly controlled landing from a jump is also a common mechanism, as the ligament is then subjected to excessive tension. It eventually ruptures abruptly, which explains the popping sensation felt by many patients at the time of injury.

What are the immediate signs of an ACL rupture?

Pain typically appears immediately after the injury and may be accompanied by a popping sound heard or felt at the time of the injury. The knee then swells rapidly within hours due to bleeding within the joint. This swelling is often accompanied by decreased mobility, making knee movements more difficult. The patient also has difficulty bearing weight on the affected leg, and all of these signs warrant prompt medical attention to assess the injury.

Is the pain always intense after a rupture?

The pain is often intense at the time of the rupture, although it can sometimes subside quite quickly after the injury. Some patients are even able to resume walking shortly afterward, which can give a false impression of limited severity. In reality, knee instability often appears later and becomes the most telling symptom of the injury. It is generally this feeling of instability that alerts the patient, because the absence of intense pain does not necessarily mean that there is no serious ligament damage.

Is it possible to tear your ACL without realizing it?

It's rare but possible, as some partial tears of the anterior cruciate ligament can go unnoticed initially. The pain may remain mild and the swelling sometimes subtle, which doesn't always lead to an immediate consultation. Over time and with a return to activity, knee instability can gradually develop, and the knee may then give way during certain movements. It's often these repeated episodes of instability that ultimately prompt a specialist consultation to assess the situation.

Is a ruptured cruciate ligament common?

Yes, an anterior cruciate ligament (ACL) rupture is a relatively common knee injury that primarily affects young, active adults. Athletes are particularly susceptible due to the significant stress placed on the joint during changes of direction, pivots, or jumps. However, it can also occur during everyday accidents. Its frequency explains the existence of well-established treatment protocols, and when properly managed, this injury now allows for excellent functional outcomes.

 
 

DIAGNOSIS AND
CONSEQUENCES

10 Frequently Asked Questions

What are the first symptoms of an ACL rupture?

The first symptoms usually appear immediately after the injury, with sharp pain felt in the knee. Rapid swelling often occurs within hours due to bleeding inside the joint. Many patients also report a popping or cracking sensation at the time of the injury. The knee then becomes more difficult to move, and weight-bearing may be painful or unstable; all of these signs should prompt immediate medical attention.

Why does the knee swell after an ACL rupture?

Knee swelling is usually due to hemarthrosis, which is bleeding within the joint. When a ligament ruptures, small blood vessels are damaged, and blood quickly accumulates in the joint cavity. This accumulation causes a feeling of tightness, pain, and stiffness in the knee. The joint may then feel warm and swollen, while the swelling restricts movement and makes mobility more difficult. It is often a telltale sign of a significant knee injury.

Is it possible to walk normally after an ACL rupture?

In many cases, walking becomes possible again after a few days, as the initial pain can subside relatively quickly after the injury. However, the knee does not necessarily regain normal stability, and rotational movements often remain difficult. The patient may experience apprehension when bearing weight, and the knee may sometimes give way unpredictably. This functional instability is, in fact, the main problem and justifies a specialized evaluation to tailor the treatment plan.

How is a ruptured ACL diagnosed?

The diagnosis begins with a detailed interview focusing on the mechanism of injury and the circumstances of the trauma. The doctor then performs a clinical examination of the knee to assess the joint and its stability. Certain specific tests, in particular, allow for the evaluation of the knee's anterior stability and are often highly suggestive of an anterior cruciate ligament (ACL) rupture. An MRI is then generally prescribed to confirm the diagnosis and analyze the condition of the ligament more precisely, while also allowing for the detection of any associated injuries; the diagnosis ultimately rests on all of these elements.

Why is the clinical examination so important?

A clinical examination allows for a rapid diagnosis by assessing knee laxity and stability through various tests performed by the physician. Some of these tests are highly specific to the anterior cruciate ligament and can strongly suggest a rupture. The clinical examination also helps rule out other possible causes of knee pain or instability. It guides further investigations and helps determine the need for an MRI, remaining essential even in the age of modern imaging, as the practitioner's experience plays a crucial role in its interpretation.

What is the role of MRI in diagnosis?

MRI is the gold standard for evaluating the anterior cruciate ligament (ACL), as it allows direct visualization of any ligament rupture. It also determines whether the rupture is complete or partial and allows for analysis of the condition of surrounding structures. The examination specifically looks for associated injuries, as the menisci and cartilage are frequently involved in this type of trauma. This information is essential for guiding treatment and enabling the physician to develop a personalized management strategy. MRI therefore plays a crucial role in the comprehensive assessment of the knee.

Is an X-ray useful if an ACL rupture is suspected?

X-rays cannot visualize the ligaments of the knee, but they remain useful for ruling out a fracture after trauma. They can also show certain indirect signs of injury or joint trauma and are often part of the initial assessment. However, they are never sufficient to diagnose an anterior cruciate ligament (ACL) rupture and must always be followed by an MRI. The two examinations are therefore complementary: X-rays primarily assess the condition of the bone, while MRI provides a more detailed analysis of soft tissues such as ligaments, menisci, and cartilage.

Is an ACL rupture often associated with other injuries?

Yes, very often, because the menisci are frequently affected during an anterior cruciate ligament (ACL) rupture, and the cartilage can also be damaged in this context. These associated lesions may be present from the time of the initial trauma, but they can also appear secondarily when knee instability persists over time. Their presence directly influences management and may sometimes lead to surgical treatment. This is why a complete and early diagnosis is essential in order to assess all the structures of the knee and to best adapt the therapeutic strategy.

What happens if the ACL tear is not treated?

An unstable knee is subjected to abnormal and repeated stresses during movement, which promotes the occurrence of repeated meniscal tears. Over time, the cartilage can also gradually wear down under the effect of these excessive stresses. In the long term, this situation increases the risk of developing knee osteoarthritis. Instability can also significantly limit daily activities, as the knee becomes less reliable and can give way unpredictably. These episodes of giving way can be dangerous, which explains the importance of appropriate management to prevent these complications.

When should you consult a knee specialist?

It is recommended to seek medical help promptly after a knee injury, especially if significant swelling develops within a few hours. A persistent feeling of instability is also a major warning sign, as is pain that prevents a return to normal daily activities. The earlier the diagnosis, the more tailored and effective the treatment can be. A quick assessment also helps limit the risk of secondary knee injuries. A specialist consultation helps guide the patient toward the most appropriate treatment while providing reassuring explanations.

TREATMENT AND
SURGERY

10 Frequently Asked Questions

Is surgery always necessary for a ruptured anterior cruciate ligament?

No, surgery is not always the treatment for an anterior cruciate ligament (ACL) rupture. The choice of treatment depends primarily on the patient's profile, including their age, activity level, and personal or athletic goals. The presence and severity of the perceived instability also play a crucial role in the decision. Some patients can achieve satisfactory stability through rehabilitation alone, while others, particularly athletes or highly active individuals, benefit more from surgical treatment. Therefore, the decision is made on a case-by-case basis and should always be tailored to the individual.

In what cases is non-surgical treatment possible?

Non-surgical treatment can be considered for patients who are not very active or whose knee remains stable during daily activities. It relies on sufficient muscle strength, as good muscle strength is essential to partially compensate for the absence of the ligament. Rehabilitation aims to strengthen the stabilizing muscles and improve knee control during movement. In some cases, a knee brace may also be recommended for additional support. Regular follow-up is necessary to assess progress in stability and symptoms, although this option is not suitable for all patients.

When is surgery recommended?

Surgery is generally recommended when knee instability persists despite initial treatment and is often indicated for young, active patients. Athletes who participate in pivoting sports are particularly affected, as these activities place significant stress on knee stability. The presence of associated injuries, especially meniscal or cartilage damage, may also strengthen the surgical indication. The goal of the procedure is to restore lasting knee stability to allow a safe return to activity. The timing of surgery is always discussed with the patient to optimize recovery and tailor the strategy to their lifestyle and functional goals.

What does an anterior cruciate ligament (ACL) surgery involve?

The procedure is called ligamentoplasty and involves replacing the torn ligament with a graft that will act as a new ligament inside the knee. The operation is performed arthroscopically, a minimally invasive technique that allows the surgeon to access the joint through small incisions and a camera. This approach minimizes scarring and generally reduces postoperative pain while facilitating recovery. It thus allows for the restoration of knee stability under optimal conditions and supports a gradual return to activities.

What types of grafts are used during the surgery?

The grafts used most often come from the patient's own tendons, the most common being those of the hamstrings or the patellar tendon. The choice of graft depends on several factors, including the patient's profile and the type of sport practiced. The surgeon's experience and preferences can also influence this decision. Each technique has specific advantages, but the goal is always to obtain a strong and functional ligament. The decision is therefore discussed and explained to the patient in order to best adapt the surgical strategy to their individual situation.

Is the procedure painful?

Postoperative pain is now generally well controlled thanks to the use of modern anesthesia and analgesia protocols. In most cases, the pain remains moderate and gradually decreases in the days following the procedure. Pain medication is tailored to each patient to ensure optimal comfort. Early knee mobilization also helps to minimize discomfort and promote recovery. Rehabilitation plays an important role during this phase, while medical follow-up allows for adjustments to the treatment plan and ensures effective pain management.

How long does the hospital stay last?

In most cases, hospitalization is short, as the procedure is often performed on an outpatient basis. The patient can therefore return home the same day after the operation, although in some situations an overnight stay may be necessary depending on the medical context or the immediate post-operative progress. The return home is supervised and accompanied by specific instructions regarding mobilization, care, and pain management. Medical follow-up is also arranged immediately upon discharge to ensure optimal recovery.

Can a prosthesis be used in place of the ligament?

No, there is currently no reliable artificial prosthesis to replace the anterior cruciate ligament. Artificial ligaments were used in the past, but they are no longer recommended due to insufficient results and potential complications. Ligamentoplasty therefore remains the gold standard technique for treating this injury. The biological graft taken from the patient gradually integrates into the knee and, over time, transforms into a new ligament capable of ensuring joint stability. This solution is durable, provides good long-term results, and benefits from solid scientific validation.

What are the risks associated with ACL surgery?

Like any surgical procedure, anterior cruciate ligament (ACL) reconstruction carries certain risks, although complications are generally rare. These can include infection, knee stiffness, or sometimes persistent pain after the operation. There is also a risk of re-rupture of the ligament, particularly if activities are resumed too soon or if rehabilitation is inadequate. Adherence to postoperative instructions is therefore essential to optimize recovery. Regular medical follow-up allows for monitoring progress and detecting any potential complications, with the benefits of the procedure outweighing the risks in the vast majority of cases.

What are the expected results after ACL surgery?

Most patients regain a stable knee after surgery, allowing for a relatively quick return to daily activities. Sports activities can then be gradually resumed depending on the progress of recovery and medical recommendations. This restored stability helps protect the knee in the long term and reduces the risk of secondary injuries. However, results depend largely on the quality of rehabilitation, with patient involvement playing a crucial role in recovery, while a comprehensive approach optimizes outcomes.

REHABILITATION
OF THE CRUCIATE LIGAMENT
PRIOR

10 Frequently Asked Questions

WHY IS REHABILITATION ESSENTIAL AFTER AN ACL RUPTURE?

Rehabilitation is a crucial step in the treatment of anterior cruciate ligament (ACL) injuries, as it allows for the gradual restoration of knee mobility and improves its function. It also aims to strengthen the muscles that contribute to joint stability, particularly the quadriceps and hamstrings. Simultaneously, it helps improve coordination and movement control to ensure safe daily activities and sports participation. Without appropriate rehabilitation, the knee can remain fragile, and the risk of instability may persist. The success of surgery therefore depends largely on this phase, which also determines the gradual return to daily and sporting activities.

WHEN DOES REHABILITATION BEGIN AFTER AN ACL RUPTURE?

Rehabilitation typically begins very soon after an injury or surgery. In the case of anterior cruciate ligament (ACL) surgery, it can even start within the first few hours following the operation. The initial goal is to minimize pain and swelling while protecting the joint. Restoring knee mobility is a rapid priority to prevent stiffness. Early intervention thus promotes a more effective and complete recovery. However, the pace of progression remains tailored to each patient, as early rehabilitation is a key factor in success.

WHAT ARE THE OBJECTIVES OF REHABILITATION IN THE FIRST FEW WEEKS?

The first few weeks of rehabilitation focus primarily on reducing inflammation and protecting the joint during the healing phase. Regaining full knee extension is a priority, as it is essential for proper joint function during walking. Flexion is then gradually addressed to achieve a satisfactory range of motion. Muscle strengthening also begins gently to reactivate the muscles that stabilize the knee. Walking is progressively rehabilitated, and the patient learns to use their knee safely again. Pain is monitored throughout this phase, as these fundamentals are crucial for effective rehabilitation progress.

WHICH MUSCLES ARE PRIMARILY STRENGTHENED DURING REHABILITATION?

The thigh muscles play a central role in knee rehabilitation following an anterior cruciate ligament (ACL) injury. The quadriceps is particularly important for ensuring anterior knee stability and allowing effective control during movement. The hamstrings also play a protective role by helping to limit stress on the ligament. The hip muscles are also engaged, as they contribute to alignment and overall control of the lower limb. The goal is to achieve good muscular balance between these different groups. Core strengthening exercises are also incorporated to improve overall body stability. This comprehensive strengthening promotes better knee control and helps reduce the risk of recurrence.

WHAT IS PROPRIOCEPTION AND WHY IS IT IMPORTANT?

Proprioception is the ability to perceive the position of the knee in space and to automatically control its movements. It allows the body to quickly adjust movements to maintain balance and protect the joint. After an anterior cruciate ligament (ACL) rupture, this function can be impaired, making movements less precise and riskier. Proprioceptive rehabilitation then becomes an essential step in the recovery program. It aims to improve balance, coordination, and weight-bearing control in various situations. This work also helps to make everyday movements and locomotion safer. It is essential before returning to sports and helps reduce the risk of further injury.

HOW LONG DOES REHABILITATION TAKE AFTER ACL SURGERY?

Rehabilitation typically lasts several months and is organized into different successive phases. Each phase corresponds to specific objectives, ranging from regaining mobility to restoring muscle strength and knee control. The total duration depends on the patient, the severity of the injury, and the quality of progress over time. On average, this process lasts between six and nine months, although some patients may require longer follow-up to achieve optimal recovery. Regular exercise and rehabilitation sessions remain essential for effective progress. Progress should always be gradual and without rushing, in order to protect the joint and consolidate the results.

IS REHABILITATION PAINFUL?

Knee stiffness is a common complication after a fracture. It is exacerbated by prolonged immobilization. Early rehabilitation reduces this risk. Working on range of motion is the priority. Appropriate management often leads to gradual improvement. Perseverance is essential.

CAN I RETURN TO WORK DURING REHABILITATION?

Yes, in many cases, it is possible to return to work after an anterior cruciate ligament (ACL) injury. However, the timeframe depends on the type of work performed and the stress it places on the knee. Sedentary jobs can often be resumed relatively quickly, while physically demanding jobs or those involving significant exertion generally require a longer recovery period. In some situations, temporary workplace adjustments may be recommended to facilitate the return. The doctor assesses the patient's ability to return to work based on their progress. Rehabilitation usually continues concurrently, with the goal of a gradual and safe return to work.

WHAT HAPPENS IF REHABILITATION IS INSUFFICIENT?

Incomplete rehabilitation can compromise the quality of outcomes after an anterior cruciate ligament (ACL) injury or surgery. In such cases, the knee may remain weak or unstable, leading to difficulties with movement or physical activity. The risk of chronic pain can also increase if muscle and functional recovery is insufficient. Returning to sports then becomes riskier, and the risk of re-injury is higher. Surgical results can therefore be disappointing if the rehabilitation phase is not conducted correctly. This is why consistent attendance at sessions and exercises is essential. Rehabilitation is often considered as important as the surgery itself in the recovery process.

WHO OVERSEES REHABILITATION AFTER AN ACL RUPTURE?

Rehabilitation is generally provided by a specialized physiotherapist, who supports the patient throughout the recovery process. It takes place in close collaboration with the doctor or surgeon to ensure adherence to medical objectives and the healing stages. Follow-up appointments are regular, and objectives are reassessed over time based on the patient's progress. The patient also plays an active role in their recovery through participation in exercises and consistent commitment. This coordinated approach optimizes outcomes while ensuring the safety of each stage of the recovery process.

RESUMPTION OF SPORT
AND DAILY LIFE

10 Frequently Asked Questions

WHEN CAN I RESUME SPORT AFTER AN ACL RUPTURE?

 
 

Returning to sport depends on the chosen treatment and the progress of rehabilitation, and is never based solely on the time elapsed since the injury or surgery. Specific functional criteria are assessed to ensure the knee is ready to withstand the demands of athletic activity. Muscle strength must be sufficient, and joint stability must be properly restored. Coordination of movements and proprioception also play a crucial role in ensuring secure footing and changes of direction. Therefore, the return to sport is gradual and supervised, always with the approval of the specialist who validates each stage.

CAN YOU RESUME ALL SPORTS AFTER ACL SURGERY?

In most cases, a return to sport is possible after complete rehabilitation, but it is done gradually according to the demands of each activity. Non-pivoting sports, such as cycling or swimming, are generally resumed first because they put less stress on the knee. Pivoting sports, which involve rapid changes of direction, require more precautions and a more advanced recovery period. The knee must then be perfectly stable and muscle control must be optimal. The patient's confidence in their joint also plays an important role in this return. A return that is too rapid can increase the risk of recurrence. As each sport has its own specific requirements, the return-to-sport protocol is always individualized.

HOW LONG DOES IT TAKE TO GET BACK TO PIVOT SPORTS?

Pivoting sports generally require a longer recovery period due to the significant stress they place on the knee. On average, recovery occurs between six and nine months after injury or surgery, although this period can sometimes be extended up to twelve months depending on the patient's progress. This depends primarily on muscle recovery and the quality of joint control. Functional tests are often performed to guide the decision and verify that the knee can withstand high stress. Specific rehabilitation remains essential to prepare for this stage. Patience is therefore a key factor in ensuring a safe and sustainable return to activity.

ARE THERE ANY TESTS BEFORE RESUME SPORT?

Yes, functional tests are generally used routinely to assess the condition of the knee before returning to sports. They allow for the analysis of various parameters such as muscle strength, balance, and coordination. Jumping, weight-bearing, and change-of-direction tests are often performed to observe the knee's ability to withstand the stresses of activity. The results are compared between the operated knee and the healthy knee to objectively determine the level of recovery. These assessments help reduce the risk of returning to sports too soon and of further injury. They reassure both the patient and the doctor about the knee's ability to resume physical exertion. These tests are therefore an integral part of the follow-up and the decision-making process regarding returning to sports.

CAN YOU GET BACK TO YOUR PRE-INjury FITNESS LEVEL?

In most cases, it is possible to regain a satisfactory level of athletic performance after proper treatment. However, a complete recovery depends on several factors, among which the quality of the rehabilitation plays a crucial role. The patient's commitment and consistency in the recovery program also play a major role in the results obtained. Adhering to the recommended timeframes remains essential to allow for sufficient healing and muscle strengthening. Some athletes even report feeling better after their recovery. The return to activity is always gradual in order to consolidate the gains. The ultimate goal is to achieve sustained performance while ensuring knee safety.

IS THERE A RISK OF ANOTHER RUPTURE OF THE CRUCIATE LIGAMENT?

Yes, there is a risk of re-injury, particularly during the first few years after returning to sports. This risk can affect the operated knee but also the opposite knee, which may be under more stress during recovery. Resuming sports activity too quickly increases this risk, especially if recovery is incomplete. Persistent muscle weakness or an imbalance between the two limbs can also be aggravating factors. Insufficient coordination and imperfect joint control also increase the risk of re-injury. This is why prevention plays a crucial role in recovery. Regular checkups and continued appropriate exercises help to limit this risk, and vigilance remains necessary even after resuming sports.

HOW TO PREVENT ANOTHER ACL RUPTURE?

Prevention relies primarily on specific training designed to protect the knee joint and reduce the risk of further injury. Muscle strengthening plays a fundamental role, as strong muscles help stabilize the knee and absorb stress during movement. Proprioceptive training is also essential, as it improves joint control and coordination. Learning proper sports techniques and movements also helps limit unnecessary stress on the knee. Several prevention programs have proven effective, particularly among athletes. Appropriate physical preparation can therefore significantly reduce the risk of injury, with prevention being an integral part of treatment and follow-up.

IS WEARING A KNEE BRACE USEFUL DURING SPORTS?

 
 

A knee brace can provide a sense of security and support, particularly when resuming physical activity after a knee injury. However, it does not replace muscle stability, which remains the primary element in protecting the joint. Its mechanical effectiveness is limited, and it cannot, on its own, compensate for a deficit in muscle strength or control. Nevertheless, it can be useful during the recovery phase or in certain specific sporting situations. Therefore, it should not be considered a sole solution. Rehabilitation and muscle strengthening remain the priorities for recovery. The decision to use a knee brace is generally made on a case-by-case basis, in consultation with a specialist.

CAN YOU HAVE A NORMAL LIFE AFTER A TORN ACL?

Yes, in the vast majority of cases, it is possible to return to an active life after appropriate treatment. Daily activities are generally resumed quite quickly, allowing for a return to walking, work, and leisure activities without major difficulty. With rehabilitation and muscle strengthening, the knee gradually regains good stability. Resuming sports can also be considered, but this must be done gradually to respect the joint's capabilities. Regular medical follow-up ensures safe progress and allows for adjustments to the treatment plan if necessary. The goal remains to achieve a reliable and functional knee in the long term.

IS LONG-TERM FOLLOW-UP NECESSARY AFTER AN ACL RUPTURE?

Yes, follow-up is recommended, even after resuming sports and completing rehabilitation. It allows for monitoring knee stability and ensuring the joint functions correctly over time. This follow-up also helps detect any potential problems or signs of joint wear early. The long-term evolution of the knee can thus be carefully monitored. The risk of osteoarthritis, which can appear several years after the injury, is a key focus of this monitoring. Consultations also allow for adjustments to physical activity if necessary. This follow-up reassures the patient and is a key element of sustainable care.

EPIDEMIOLOGY

THE CRUCIATE LIGAMENT IN NUMBERS

≈10,000

ACL ruptures are diagnosed every year in Switzerland, making this injury one of the most frequent in the knee.

6-9

On average, months of rehabilitation are needed after ACL surgery before returning to sport.

3x

more common in athletic women than in men, particularly due to anatomical and hormonal factors

+ 70 %

success rates for ligamentoplasty with complete and appropriate surgical and rehabilitation management

RECOGNIZING THE SIGNS

When should you seek emergency medical attention? 

Certain symptoms following a knee injury require immediate attention. Don't delay in seeking medical help if you recognize any of these signs.

CALL NOW

A cracking sound was audible at the time of the trauma.

A "pop" or sharp snap felt or heard at the moment of knee twisting is a characteristic sign of ACL rupture.

It is impossible to continue the activity

Immediate inability to resume sport or to put the foot on the ground after the injury.

Rapid swelling of the knee

Hemarthrosis (blood in the joint) occurring within 2 hours of injury, a sign of severe ligament damage.

Feeling of instability

The feeling that the knee "gives way" or gives way under the weight of the body, even at rest or while walking.

Intense and persistent pain

Acute pain that does not respond to rest or usual painkillers, and may be accompanied by total functional impairment.

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