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Meniscus Root Tears

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Significance of root tears?

Biomechanically comparable to a total meniscectomy due to compromised hoop stresses

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What are the different etiology of Lateral Meniscus (LM) or Medial Meniscus (MM) root tears?

LM due to trauma
MM due to degenerative
A/w SONK – 80% of SONK has medial root tear. Usually MM tear first then excess loading on the tibia plateau ➔ SONK

The Role of Meniscal Tears in Spontaneous Osteonecrosis of the Knee: A Systematic Review of Suspected Etiology and a Call to Revisit Nomenclature - PubMed

Physicians should be cognizant of the high prevalence of medial meniscus root tears in patients with SONK. Meniscectomy and meniscal tears, particularly of the medial meniscus posterior root, increase contact pressures and create an environment from which insufficiency fractures can emanate. We beli ...

pubmed.ncbi.nlm.nih.gov

The Role of Meniscal Tears in Spontaneous Osteonecrosis of the Knee: A Systematic Review of Suspected Etiology and a Call to Revisit Nomenclature - PubMed

hussain2017.pdf153.8KB

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What are the MRI findings of root tears?

Meniscal Root Tears: Current Concepts Review - PubMed

Meniscal root tears are defined as radial tears located within 1 cm from the meniscal attachment or a bony root avulsion. This injury is biomechanically comparable to a total meniscectomy, leading to compromised hoop stresses resulting in decreased tibiofemoral contact area and increased contact pre ...

pubmed.ncbi.nlm.nih.gov

Meniscal Root Tears: Current Concepts Review - PubMed

Coronal: Meniscus extrusion > 3mm; Linear high sinal

Sagittal: Ghost sign

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Surgical Management of root tears?

Transtibial pull out technique (with tibia tunnel)
Suture Anchor technique

Meniscal Root Tears: Current Concepts Review - PubMed

pubmed.ncbi.nlm.nih.gov

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Do Meniscus extrusion only occur in meniscal root tears?

No.
For extrusion > 3mm,

65% were from medial posterior horn tears,
21% medial body tears,
5% medial root tears
9% lateral body tears
4% lateral posterior horn tears

Meniscal Extrusion in the Knee: Should only 3 mm Extrusion be Considered Significant? An Assessment by MRI and Arthroscopy

Aim. The aim of this study was to assess whether significant meniscal extrusion of more than 3 mm or of even lesser degrees of extrusion could be considered significant. We also aimed to determine the morphology of tears that are most likely to be associated ...

www.ncbi.nlm.nih.gov

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