Tendon retraction: why a chronic cuff tear is a different operation.

Two operations, same name.

A patient comes into clinic with a rotator cuff tear on MRI. The instinct — understandable, even from surgeons — is to talk about "cuff repair" as if it is one operation. It is not. The cuff repair we do in a young patient three weeks after a traumatic tear bears almost no resemblance to the cuff repair we do in a sixty-year-old with a chronic, retracted, fatty-infiltrated tear.

What separates the two is tendon retraction.

What "retraction" means.

The supraspinatus tendon — the most commonly torn rotator cuff tendon — runs from the muscle belly above the spine of the scapula, across the top of the humeral head, to its bony insertion on the greater tuberosity. When the tendon tears at its insertion, the muscle (which is constantly pulling on the tendon) starts to pull the free tendon edge medially.

In a fresh tear, the tendon edge sits just adjacent to its native footprint. With time — weeks to months — the edge retracts further. At first it sits at the top of the humerus. Then it sits over the glenoid. Then, in chronic massive tears, it disappears medial to the glenoid altogether. The tendon hasn't gone away — it has migrated.

What the muscle does while the tendon is retracting.

The muscle does not wait. As the tendon stays retracted, the muscle fibres atrophy and are replaced by fat. The Goutallier classification — developed in 1994 — grades the fatty infiltration of the muscle on imaging from 0 (normal) to 4 (mostly fat).¹

This matters because:

• Goutallier 0–1 muscle — can be repaired with confidence. The muscle is healthy enough that the tendon will hold tension after repair.
• Goutallier 2 muscle — can usually be repaired, but the conversation about augmentation and biology becomes important.
• Goutallier 3–4 muscle — the muscle has substantially failed. Even a technically perfect repair will not hold — the tissue cannot generate the force needed to keep the repair in tension. The operation is no longer "repair." It becomes something else.

What the scope shows.

Part two — the arthroscopic view: what a chronically retracted cuff tendon actually looks like inside the joint.

The arthroscopic view confirms what the MRI suggested. In a fresh tear, the tendon edge is healthy — pink, thick, with normal collagen architecture, sitting close to the footprint. In a chronic retracted tear, the tendon edge is changed: yellow-grey, thinned, fibrotic, often adherent to the underside of the acromion above and the labrum below.

Two findings during the scope are the most decision-defining:

1. Excursion. When the surgeon grasps the retracted tendon edge with an arthroscopic grasper and gently pulls it laterally, how far does it come? A tendon that reaches the footprint with mild traction can be repaired. A tendon that does not reach without aggressive mobilisation cannot be repaired — or if it is, will fail.
2. Tissue quality. A thin, fibrotic, paper-like tendon edge will not hold sutures even if it reaches the footprint. The repair will pull through the tissue rather than the bone-tendon interface.

These two findings, more than any pre-operative imaging, define the operation.

The decision tree.

Based on the combined picture — imaging plus arthroscopic findings — the operation diverges into four possible paths.

1. Standard arthroscopic cuff repair.

For tears that are repairable: tendon reaches the footprint, tissue quality is acceptable, muscle is not severely infiltrated. Modern double-row or suture-bridge configurations. The first-line operation, and the one most patients have in mind when they hear "cuff repair." Read about arthroscopic rotator cuff repair →

2. Augmented cuff repair.

For tears that are technically repairable but have poor biology — chronic, smoker, diabetic, re-tear, or Goutallier 2 muscle. The repair is augmented at surgery with a bio-inductive collagen implant (REGENETEN) or peptide-loaded patch. The aim is to improve the biology of healing in tissue that would otherwise not hold. Read the biology essay →

3. Superior capsule reconstruction or tendon transfer.

For massive irreparable tears in younger patients (typically under 65) with preserved cartilage. Mihata's superior capsule reconstruction (SCR) uses a fascia lata or dermal allograft to reconstruct the superior capsule and re-centre the humeral head.² Alternatively, a lower trapezius or latissimus dorsi tendon transfer can restore active rotation in selected patients.

4. Reverse total shoulder replacement.

For massive irreparable tears in older patients, particularly when the joint has developed secondary arthritis (cuff tear arthropathy). The reverse total shoulder replacement was specifically designed for this end-stage state — it bypasses the cuff entirely and lets the deltoid muscle elevate the arm. Reliable pain relief and meaningful restoration of overhead function in selected patients. Read about reverse shoulder replacement →

Why early diagnosis matters in younger patients.

The single most important variable in determining which path a patient ends up on is the time between the tear and the operation. A 50-year-old who tears their cuff in a fall and is seen within four weeks has a high chance of being on Path 1. The same 50-year-old, seen two years later with a chronic retracted tear, may be on Path 3 or Path 4 — not because the surgery has changed but because the tendon and muscle have.

For acute traumatic cuff tears in patients under 65, the rooms triage as a priority pathway. The time-cost of delay is real, and the published data is clear on this point.³

What this means for your shoulder.

If you have been told you have a rotator cuff tear, three questions help clarify which path is being planned for you:

1. What is the Goutallier grade of my muscle on MRI?
2. How far has the tendon retracted — is it still at the footprint, over the humerus, or medial to the glenoid?
3. Given the imaging and my age, is the planned operation a repair, an augmented repair, a reconstruction, or a replacement?

The answer to the third question is what determines the recovery timeline, the realistic functional goal, and the conversation you should be having about your shoulder — not just the size of the tear on imaging.

References.

1. Goutallier D, et al. Fatty muscle degeneration in cuff ruptures. Clin Orthop Relat Res. 1994;(304):78–83.
2. Mihata T, et al. Clinical results of arthroscopic superior capsule reconstruction for irreparable rotator cuff tears. Arthroscopy. 2013;29(3):459–470.
3. Petersen SA, Murphy TP. The timing of rotator cuff repair for the restoration of function. J Shoulder Elbow Surg. 2011;20(1):62–68.