Tendon Repair Surgery

Introduction

If your doctor has recommended tendon repair surgery, you are likely dealing with an injury that limits how you move, grip, walk, or lift. A torn tendon does not just hurt — it can take away a specific function of a joint, such as raising the arm overhead, pushing off the foot while walking, straightening the knee, or bending a finger.

Tendon repair surgery is an operation that reconnects a torn tendon, either by stitching the ends back together or by reattaching the tendon to the bone it pulled away from. The goal is to restore the link between muscle and bone so that the joint can move and bear load again.

This guide is written for patients who already have a diagnosed tendon injury and are now planning the next steps. It explains what the surgery involves, the different surgical approaches, what recovery typically looks like for different tendons in the body, and how rehabilitation supports the final result. The exact plan for any individual is decided between the patient and the orthopaedic surgeon, taking into account the tendon involved, the age and activity level of the patient, the time since injury, and the quality of the remaining tissue.

What Is Tendon Repair Surgery?

Tendon repair surgery is performed when a tendon has been torn, cut, or pulled off its bone attachment, and when the injury is unlikely to recover with rest, splinting, or physiotherapy alone. During surgery, the orthopaedic surgeon may:

• Stitch the two torn ends of a tendon back together (primary repair)
• Reattach a tendon to bone, often using small anchors (re-insertion)
• Bridge a gap between tendon ends with a graft (reconstruction)
• Release scar tissue or other structures that are preventing the tendon from gliding

Tendon injuries can happen in many places — the shoulder (rotator cuff), the elbow (biceps or triceps), the hand and wrist (flexor and extensor tendons of the fingers), the knee (patellar or quadriceps tendon), and the back of the heel (Achilles tendon) are the most common. The surgical plan depends on which tendon is involved, the pattern of the tear, and how much time has passed since the injury.

Why Is Tendon Repair Surgery Performed?

Not every tendon injury requires surgery. Many partial tears, tendinopathies (degenerative wear of the tendon), and minor strains improve with non-surgical treatment. Surgery is typically considered when the tendon is fully torn, when function is significantly affected, or when non-surgical care has not worked.

Common reasons surgeons offer tendon repair include:

• Complete (full-thickness) tendon tear — the tendon is no longer continuous and cannot transmit force
• Tendon avulsion — the tendon has pulled away from its bone attachment, sometimes taking a small piece of bone with it
• Lacerated tendon — a cut, often in the hand, where a sharp object has divided the tendon
• Loss of essential function — for example, inability to bend a finger, lift the arm, straighten the knee, or rise on tiptoe
• Failed conservative treatment — pain or weakness persists after a course of physiotherapy and rest
• Young or active patients with high functional demands, where surgical repair often gives a more predictable return of strength than non-surgical care

The exact threshold for offering surgery varies by tendon. For instance, Achilles tendon ruptures can sometimes be managed non-surgically with a structured functional rehabilitation programme, and major societies including the American Academy of Orthopaedic Surgeons describe both surgical and non-surgical options as reasonable, with the choice depending on the individual. In contrast, a fully lacerated flexor tendon in the finger almost always requires surgical repair, because the tendon ends retract and will not heal on their own.

Who Is a Candidate?

Whether tendon repair surgery is suitable depends on several factors. Surgeons typically consider:

• The type and location of the tear. Complete tears, avulsions from bone, and lacerations are usually surgical. Partial tears may be managed without surgery.
• Time since the injury. Acute tears (within a few weeks) are usually easier to repair directly. Older tears may need a graft because the tendon ends have retracted and the muscle has shortened.
• Tissue quality. Healthy, well-vascularised tendon holds stitches better than a degenerated, frayed tendon.
• Age and activity level. Younger and more active patients often benefit from earlier repair. Older or less active patients with some tendons (such as small rotator cuff tears) may do well with rehabilitation alone.
• General health. Diabetes, smoking, obesity, long-term steroid use, and inflammatory arthritis can slow tendon healing and may influence the decision.
• Realistic goals. Surgery aims to restore function, but the joint may not return to exactly how it felt before the injury, especially after large or chronic tears.

The surgeon will weigh these factors together with imaging findings and a careful examination before recommending an approach.

How the Injury Is Confirmed

Most patients arriving at the point of planning surgery have already been through a clinical examination and imaging. A short summary of what the assessment usually involves:

Clinical Examination

The orthopaedic specialist tests the strength of the muscle, the range of motion of the joint, areas of tenderness, and specific manoeuvres designed to stress particular tendons. For example, the Thompson test (squeezing the calf to see if the foot moves) helps detect an Achilles tendon rupture, and specific resisted-movement tests help identify rotator cuff or biceps tendon tears.

Imaging Tests

• Ultrasound — useful for many tendons, including the Achilles and rotator cuff. It is quick and shows the tendon moving in real time.
• MRI (magnetic resonance imaging) — gives detailed images of soft tissue and is often used to confirm the size and location of a tear, especially in the shoulder or knee.
• X-ray — does not show the tendon itself but rules out a fracture or detects a small piece of bone pulled off with the tendon.

These tests, taken together with the examination, help the surgeon plan the operation — including whether a graft may be needed and which surgical approach is most suitable.

Alternatives to Surgery

For some tendon injuries, non-surgical (conservative) treatment is a genuine option. It is more often considered for partial tears, for chronic tendinopathy (degenerative tendon pain without a full tear), and for certain complete tears in patients with lower functional demands.

Non-surgical options include:

• Rest and activity modification — avoiding the movements that aggravate the tendon
• Bracing, splinting, or casting — immobilising the area in a position that allows the tendon to heal
• Ice and anti-inflammatory medications — for pain and swelling, used short-term
• Physiotherapy — structured exercises, often emphasising eccentric loading (lengthening contractions) for chronic tendinopathies
• Functional rehabilitation programmes — for example, early controlled weight-bearing in a boot for selected Achilles ruptures
• Injection therapies — such as corticosteroid injections for some inflammatory tendon problems, or platelet-rich plasma (PRP) injections, which some surgeons use for certain tendinopathies. The evidence for PRP varies by tendon and remains an area of ongoing study.

Surgeons commonly try a period of conservative treatment first for partial tears and for chronic overuse problems. Surgery is considered when symptoms do not settle, when imaging shows a tear that is unlikely to heal on its own, or when the function lost is essential to the patient’s daily life or work.

Common Tendon Repairs by Location

The general principle of tendon repair is the same across the body, but the specific operation, timing, and recovery differ depending on which tendon is involved. The most frequent tendon repairs include the following.

Rotator Cuff Repair (Shoulder)

The rotator cuff is a group of four tendons that stabilise the shoulder and allow lifting and rotation of the arm. Tears can be partial or full-thickness, and may follow a single injury or develop gradually with age. Repair usually involves reattaching the torn tendon to the upper arm bone (humerus) using small bone anchors with stitches. Most rotator cuff repairs today are performed arthroscopically (keyhole surgery).

Achilles Tendon Repair (Heel)

The Achilles is the largest tendon in the body and links the calf muscles to the heel bone. Rupture often occurs during sudden push-off movements in sport. Surgical repair stitches the torn ends together, sometimes through a small incision (percutaneous or mini-open) to reduce skin and wound problems. Non-surgical management with early functional rehabilitation is also an established option, and the choice between the two is made with the surgeon.

Patellar and Quadriceps Tendon Repair (Knee)

The patellar tendon connects the kneecap to the shin bone; the quadriceps tendon connects the thigh muscle to the top of the kneecap. A complete rupture of either makes it impossible to straighten the knee against gravity. Repair generally involves stitching the tendon and reattaching it to the kneecap with anchors or sutures passed through small bone tunnels. Early surgery (within the first few weeks) is usually preferred because the muscle pulls the torn tendon away with time.

Flexor and Extensor Tendon Repair (Hand and Fingers)

The flexor tendons bend the fingers; the extensor tendons straighten them. They are commonly injured by cuts on the palm or back of the hand, or by sudden forced movements (such as a finger caught in clothing, causing a “jersey finger”). Hand tendon repairs require precise stitching technique and a carefully supervised rehabilitation programme to prevent stiffness and re-rupture. They are usually performed by surgeons with specific hand-surgery training.

Biceps and Triceps Tendon Repair (Elbow and Shoulder)

The biceps tendon can tear at the shoulder end or at the elbow end. A distal biceps rupture (at the elbow) typically requires surgical repair in active patients to restore strength in turning the forearm and bending the elbow. The tendon is reattached to the radius bone using anchors or a button-suspension device. Triceps tendon ruptures are less common but also generally repaired surgically.

Peroneal, Posterior Tibial, and Other Foot/Ankle Tendons

Tendons around the ankle — particularly the peroneal tendons on the outside and the posterior tibial tendon on the inside — can tear from trauma or chronic overload. Repair may involve direct suture, debridement of degenerated tissue, or tendon transfer if the tendon is too damaged to function.

Surgical Approaches

Surgeons choose the approach based on the tendon, the size and pattern of the tear, the quality of the tissue, and their own training and experience. The main approaches are described below.

Open Tendon Repair

Open repair uses a single longer incision so that the surgeon can see and handle the tendon directly. It is the traditional approach and remains useful for:

• Complex tears with retracted tendon ends
• Tendons in the hand, where precise visualisation is essential
• Large or chronic tears that need reconstruction with a graft
• Situations where arthroscopic access is technically difficult

Open surgery gives excellent control but involves a larger wound, which can mean a longer healing time for the skin and more visible scar.

Arthroscopic Tendon Repair

Arthroscopy is a minimally invasive (“keyhole”) technique. The surgeon makes a few small incisions and inserts a thin camera and specialised instruments into the joint. Images from the camera are displayed on a screen, allowing the surgeon to work inside the joint with magnified views.

Arthroscopic repair is widely used for rotator cuff tears and for some knee and ankle tendon repairs. Reported advantages, when the technique is suitable, include smaller scars, less disturbance of surrounding tissue, and a lower risk of wound problems. The internal repair itself heals at the same biological pace as an open repair, so the overall rehabilitation timeline is similar.

Mini-Open and Percutaneous Repair

Some tendons, particularly the Achilles, can be repaired through one or more small incisions using specialised passing instruments. This is sometimes called a percutaneous or mini-open repair. It aims to combine the strength of a direct stitch with a smaller skin wound and a lower risk of wound healing problems.

Tendon Reconstruction with a Graft

When the tendon ends cannot be brought together — for example, in chronic tears with significant retraction, or when a large segment of tendon is missing — a graft is used to bridge the gap. Graft tissue may come from another tendon in the same patient (autograft), from a donor (allograft), or from synthetic material in certain cases. Reconstruction is more complex than primary repair and often involves longer rehabilitation.

Tendon Transfer

If a tendon is too damaged to function and cannot be reconstructed, a nearby tendon may be detached from its usual insertion and re-routed to take over the lost function. Tendon transfers are most commonly performed for chronic, irreparable rotator cuff tears, certain foot and ankle conditions, and some hand reconstructions.

Preparing for Tendon Repair Surgery

Preparation depends on the tendon and the anaesthesia plan, but most patients are asked to do the following.

Pre-operative Assessment

This usually includes blood tests, an electrocardiogram (ECG) if relevant to age or health, and a review by an anaesthesiologist. Existing medical conditions such as diabetes, high blood pressure, or heart disease are checked and optimised.

Medication Review

Some medications — particularly blood thinners and certain anti-inflammatories — may need to be paused before surgery. Patients with diabetes may receive specific instructions about their glucose-lowering medications on the day of the procedure. All medications and supplements should be disclosed.

Lifestyle Preparation

• Stopping smoking is strongly encouraged. Smoking significantly slows tendon healing and increases the risk of wound complications.
• Glucose control in patients with diabetes supports healing.
• Pre-habilitation — physiotherapy before surgery to maintain strength in surrounding muscles — is sometimes recommended.

Planning for Recovery

Because tendon repair involves a period of restricted use of the limb, planning practical support in advance helps. For example, an Achilles or knee tendon repair means limited walking for several weeks; a shoulder or biceps repair means the arm will be in a sling. Patients are usually advised to organise help with daily tasks, transport, and time off work.

The Day Before Surgery

Most patients are asked not to eat or drink for several hours before surgery. The surgical team gives specific instructions, including when to arrive at the hospital, what to wear, and what to bring.

What Happens During Tendon Repair Surgery

The exact steps depend on the tendon and approach, but the general flow is similar.

Anaesthesia

Tendon repairs can be performed under general anaesthesia (the patient is asleep), regional anaesthesia (a nerve block that numbs the limb), spinal anaesthesia (for lower-limb surgery), or a combination. The anaesthesiologist discusses the options before the operation.

Positioning and Preparation

The patient is positioned to give the surgeon the best access — for example, lying on the back, on the side, or face down for an Achilles repair. The skin is cleaned with antiseptic and sterile drapes are placed. A tourniquet may be used on the arm or leg to reduce bleeding during the operation.

The Repair

The surgeon makes the planned incisions, identifies the torn tendon, and prepares the ends. Specialised stitches are then used to bring the ends together or to anchor the tendon back to bone. Small implants called suture anchors — tiny screws or pegs with attached threads — are commonly used to fix tendon to bone. If a graft is needed, it is prepared and woven into the repair.

The surgeon then tests the repair by gently moving the joint, checks for bleeding, and closes the incisions with stitches or staples. A dressing and often a splint, brace, sling, or cast is applied before the patient wakes up or moves to recovery.

Duration

Most tendon repairs take between one and three hours, though complex reconstructions can take longer.

Recovery and Healing

Hospital Stay

Many tendon repairs are performed as day-care procedures or with a short overnight stay. More complex repairs, or those done under general anaesthesia in patients with other health issues, may involve one or two nights in hospital.

The First Few Weeks: Protection

In the first phase after surgery, the priority is to protect the repaired tendon from the forces that could pull it apart again. This typically involves:

• A sling, splint, brace, or boot to hold the joint in a safe position
• Limited or no weight-bearing through the limb (for lower-limb repairs)
• Pain medication, ice, and elevation to manage swelling
• Wound care and review of stitches

Depending on the surgeon’s protocol, gentle, controlled movements may begin within days — for example, passive finger movements after flexor tendon repair, or pendulum exercises after rotator cuff repair. Early protected motion helps reduce stiffness without overloading the repair.

Weeks to Months: Restoring Movement

Over the following weeks, the brace is gradually loosened and the joint is allowed more movement. The physiotherapist guides a stepwise progression:

• Passive movement — the therapist or patient’s other hand moves the joint without using the repaired muscle
• Active-assisted movement — the patient begins to move the joint with help
• Active movement — the patient moves the joint using the repaired tendon, without resistance

This phase typically spans several weeks and is the foundation for safe strengthening later.

Strengthening Phase

Once the tendon is judged strong enough — usually around two to three months after surgery, depending on the tendon — resistance exercises begin. Strength is rebuilt gradually with bands, light weights, and functional movements.

Return to Activity

Return to demanding activity, including sport and heavy manual work, is later still. For most major tendon repairs:

• Light daily activities resume in the first one to three months, depending on the tendon
• Return to driving depends on the limb involved — commonly several weeks after upper limb surgery and longer after lower limb surgery, when the surgeon confirms safety
• Return to running, jumping, or contact sport typically takes six to nine months, and sometimes longer for complex repairs

Premature return to high-load activity is one of the main causes of re-rupture, and rehabilitation programmes are designed to stage activity carefully.

The Role of Physiotherapy

Structured physiotherapy is essential after almost every tendon repair. The therapist works alongside the surgeon, following a specific protocol for the tendon involved. Adherence to the rehabilitation plan is one of the strongest predictors of a good outcome.

Risks and Complications

Tendon repair surgery is generally safe, but every operation carries risks. The common ones include:

• Infection — usually superficial and treatable with antibiotics; deeper infections are uncommon but more serious
• Bleeding and haematoma — a collection of blood at the surgical site
• Stiffness — especially in hand, shoulder, and elbow repairs, often improved with physiotherapy
• Re-rupture — the repaired tendon tears again, either from a new injury or premature return to activity
• Scar tissue and adhesions — can limit tendon gliding and movement, particularly in the hand
• Nerve injury — uncommon, but possible when tendons run close to nerves (for example, around the elbow or ankle)
• Blood clots (deep vein thrombosis) — more common after lower-limb surgery and prolonged immobilisation
• Anchor or implant problems — rarely, suture anchors can loosen or cause irritation
• Complex regional pain syndrome — a rare condition involving persistent pain and changes in the limb
• Anaesthetic complications — discussed by the anaesthesiologist before surgery

Risks are influenced by patient factors. Smoking, poorly controlled diabetes, obesity, long-term steroid use, and certain inflammatory conditions can slow healing and raise complication rates. The surgical team takes these into account when planning the operation and the recovery.

Life After Tendon Repair Surgery

Most patients regain useful function after tendon repair, though the precise outcome depends on the tendon, the size of the original tear, the time from injury to surgery, and how the rehabilitation phase goes. Some general patterns:

• Pain relief is one of the most consistent improvements after surgery, particularly for chronic tears that had been painful for months.
• Strength usually improves substantially but may not fully match the uninjured side, especially after large or chronic tears.
• Range of motion often returns close to normal with diligent physiotherapy; small differences may remain.
• Sport and heavy work are possible for many patients, sometimes at the previous level. For high-demand athletes, careful rehabilitation and a phased return are particularly important.

Long-term Joint Care

Once the formal rehabilitation programme is complete, ongoing care helps protect the repair:

• Continuing strengthening exercises for the muscles around the joint
• Warming up before sport and avoiding sudden, unaccustomed loading
• Maintaining a healthy weight, which reduces load on lower-limb tendons
• Treating other tendons in the same area if they show signs of overuse
• Following up with the surgeon for any new pain, swelling, or weakness

People who have had one tendon injury can have another, either in the same tendon or in a different one, particularly if there is underlying tendon degeneration. Regular conditioning and good general health support tendon durability over time.

Tendon Repair Surgery in Children

Tendon injuries in children differ in some important ways from those in adults. Children’s tendons are usually healthy, with good blood supply, and the surrounding bone is still growing. Most tendon injuries in children are from cuts (especially to the hand) or from sports trauma.

Key points for paediatric tendon repair include:

• Healing tends to be faster and the outcomes are often better than for similar injuries in adults, particularly for hand tendon lacerations.
• Repairs are usually done under general anaesthesia.
• Rehabilitation may use modified protocols, because young children may not reliably follow detailed exercise instructions. Splints and casts are sometimes used for longer to protect the repair.
• Care is taken to avoid damaging the growth plates near tendon attachments, especially in the knee and ankle.
• Paediatric orthopaedic surgeons or hand surgeons with experience treating children typically lead the care.

Parents are usually closely involved in supervising activity restrictions and supporting the child through the rehabilitation programme.

Frequently Asked Questions

How long does tendon repair surgery take?

Most tendon repairs take one to three hours, depending on the tendon, the size of the tear, and whether a graft or reconstruction is needed.

Is the surgery painful?

The operation itself is performed under anaesthesia, so it is not painful. There is discomfort afterwards, which is controlled with pain medication and usually improves significantly over the first few weeks. Pain tends to be worse with larger repairs and in tendons that move a lot, such as the shoulder or finger flexors.

Can a torn tendon heal without surgery?

Partial tears and some complete tears can heal with non-surgical treatment, depending on the tendon and the patient. For example, certain Achilles ruptures and small rotator cuff tears may be managed with rehabilitation alone. Full-thickness tears with significant loss of function, and lacerated tendons, usually need surgery. The right approach is decided after examination and imaging.

How soon will I be able to use the limb again?

Protected movement often begins in the first days or weeks, but full use of the limb takes much longer. Light daily activities typically return within one to three months; sport and heavy work usually take six to nine months or more. The exact timeline depends on the tendon and the surgeon’s protocol.

When can I drive after surgery?

This depends on the limb involved and whether you can control the vehicle safely, including emergency braking. Most surgeons advise waiting several weeks after upper-limb surgery and longer after lower-limb or right-foot surgery. The surgeon should confirm when driving is safe in your specific situation.

Is physiotherapy really necessary?

Yes. Tendon healing produces a repair that needs guided, gradual loading to regain movement and strength. Without structured rehabilitation, joints often become stiff and the tendon may not reach its full strength. Skipping or rushing through physiotherapy increases the risk of stiffness and re-rupture.

Can a repaired tendon tear again?

Yes. Re-rupture is one of the recognised risks after tendon repair, particularly in the first months when the tendon is still healing, and especially if rehabilitation is rushed or activity is resumed too early. Following the rehabilitation plan and returning to high-load activity in stages reduces the risk.

Will I be able to return to sport?

Many patients return to sport after tendon repair, sometimes to their previous level. The likelihood depends on the tendon, the size and chronicity of the tear, the demands of the sport, and the quality of rehabilitation. Athletes are typically guided through a sport-specific return-to-play programme.

Will there be a visible scar?

Open repairs leave a longer scar; arthroscopic and percutaneous repairs leave several small scars. Scars usually fade over months. The visibility depends on the location, skin type, and individual healing.

Conclusion

Tendon repair surgery is a well-established way to restore the connection between muscle and bone after a tear, avulsion, or laceration. The principles are similar across the body — reattach or rejoin the tendon, protect the repair while it heals, and rebuild movement and strength through rehabilitation — but the details vary depending on the tendon and the injury.

The most important decisions — whether to operate, which approach to use, and how to plan the recovery — are made together with an orthopaedic surgeon who has examined the injury and reviewed the imaging. With a well-chosen operation and a carefully followed rehabilitation programme, most patients regain meaningful function and return to the activities that matter to them.