Root Repair

For Medical Students

What It Tests

A meniscal root tear detaches the meniscus from its attachment, so the meniscus stops working even though it is intact, and a repair reattaches it. 4.9.9 covers meniscal root tears.

The examination after a root repair is checking the range, the effusion, the joint line and whether the symptoms that led to the repair have settled. 4.9.10 covers meniscal deficiency.

It differs from a peripheral repair because the loading pattern and the protection are different. 4.20.2 covers the meniscal repair assessment.

How It Is Performed

Establish which root was repaired, when, and whether anything else was done, since root repairs are often combined with an osteotomy. 4.2.30 covers previous surgery.

Look at the scars, which indicate the approach and any additional procedure. 4.3.7 covers surgical scars.

Assess the effusion, because a persistent effusion after a root repair suggests the repair or the compartment is not settling. 4.8.3 covers the bulge sign.

Measure the range, recording flexion, since deep flexion loads a root repair most. 4.7.10 covers the post operative range assessment.

Palpate the posterior joint line on the repaired side, which is where the tenderness sits. 4.6.9 covers posterior knee palpation.

Assess the alignment, since a varus limb loads a medial root repair and that is why an osteotomy is often combined. 4.3.3 covers standing alignment.

Defer the provocation tests during the protected period and record that decision. 4.9.3 covers the McMurray test.

What a Positive Means

A settled knee with a recovering range, a quiet posterior joint line and no effusion is the expected course.

Posterior joint line tenderness with a recurrent effusion after the early months suggests the repair has not held. 4.9.9 covers meniscal root tears.

Pain on deep flexion at a stage when it should have settled suggests the repaired root is being loaded. 4.7.4 covers the flexion assessment.

Compartment pain with a malaligned limb suggests the load is the problem rather than the repair. 4.18.3 covers the varus worn knee.

A knee with no meniscal findings and compartment pain raises the articular surface. 4.17.5 covers articular cartilage defects.

MRCS Level

How It Is Performed

In a viva this is the post root repair station and the expected answer links the repair to the alignment.

The expected points are the root repaired and the date, any concurrent osteotomy, the scars, the effusion, the range with flexion recorded, the posterior joint line, the alignment and the deferred provocation tests.

Say that you would assess the alignment, because a varus limb loads a medial root repair. 4.3.3 covers standing alignment.

Say that you would ask whether an osteotomy was done at the same time. 4.20.4 covers that assessment.

Say that you would avoid deep flexion provocation during the protected period. 4.9.3 covers the McMurray test.

What a Positive Means

The reasoning expected is that the root anchors the meniscus so the hoop mechanism can convert load into circumferential tension, and a detached root removes that. 3.6.9 covers root biomechanics.

A detached root lets the meniscus extrude, so the compartment loses its load distribution and behaves as if the meniscus were absent. 3.6.10 covers meniscal extrusion.

Reattaching the root restores the anchor, which is why the repair is protected from the loads that would pull on it. 3.6.11 covers the effects of root tears.

A varus limb increases the medial load, which is why the alignment is corrected alongside a medial root repair. 3.13.9 covers osteotomy biomechanics.

How Good It Is

The examination follows the knee's recovery reliably and says little about the root itself.

Its best contribution is the combination of the posterior joint line, the effusion and the alignment, which together frame the compartment's state. 4.6.9 covers posterior knee palpation.

It cannot assess whether the root has healed or whether extrusion persists.

Magnetic resonance imaging shows extrusion and the repair, so the examination establishes the symptoms and the imaging the mechanics. 4.1.6 covers that relationship.

No figures appear for any accuracy comparison on this page, under decision 023, and the comparison is the claim being made.

FRCS Level

How Good It Is

At decision level the examination separates a settling repair, a failing one and a compartment that is deteriorating for another reason.

Posterior joint line tenderness with an effusion after the protected period raises a failed repair, and the examination is where that starts. 4.9.9 covers meniscal root tears.

Compartment pain with a varus limb and a quiet joint line points at the load rather than the repair, which is a different decision. 4.18.3 covers the varus worn knee.

A knee with a root repair and progressive compartment narrowing is examined for alignment and range, because both govern the next step. 4.5.1 covers the mechanical axis.

Pain on deep flexion persisting beyond the protocol is a finding rather than a stage, and the protocol is what defines that. 4.7.10 covers the post operative range assessment.

Where It Misleads

The commonest error is examining the root repair without examining the alignment, so the load that caused the problem is not assessed. 4.3.3 covers standing alignment.

A root repair is examined with a peripheral repair's protocol, so the deep flexion restriction is relaxed too early. 4.20.2 covers the meniscal repair assessment.

Posterior joint line tenderness is attributed to the repair when a posterior cyst or a tendon is the source. 4.6.10 covers the popliteal fossa examination.

A compartment that continues to deteriorate is attributed to a failed repair when the articular surface was already affected. 4.17.5 covers articular cartilage defects.

Extrusion is not detectable clinically, so its persistence is invisible to the examination. 4.9.10 covers meniscal deficiency.

Fellowship Level

Where It Misleads

At fellowship level the root repair's examination has to separate the repair's success from the compartment's trajectory, and those are different questions.

A repair can heal while the compartment continues to deteriorate, because the cartilage damage that preceded it does not reverse. 4.17.5 covers articular cartilage defects.

The examination cannot assess extrusion, which is the mechanical measure of whether the repair restored anything. 4.9.10 covers meniscal deficiency.

A combined osteotomy changes every alignment finding, so the alignment examination after surgery describes the correction rather than the original problem. 4.20.4 covers that assessment.

Posterior joint line tenderness is non specific after any posterior work, which removes the localising sign at the site that matters. 4.6.9 covers posterior knee palpation.

Deep flexion restriction protects the repair and limits function, so the examination records a trade off rather than a result. 4.7.9 covers the functional range.