e-journal

Vertical Tears of the Lateral Meniscus

---

Background: Lateral meniscal tears are often seen with acute anterior cruciate ligament (ACL) injury and may be left in situ,repaired, or treated with meniscectomy. Clinical studies have shown good outcomes with vertical tears left in situ and poor outcomes following meniscectomy. However, clinically relevant studies are needed to establish a biomechanical foundation for treatment of these tears, particularly regarding the effects of meniscectomy.
Purpose: To compare tibiofemoral joint mechanics following vertical lateral meniscal tears and meniscectomies. We hypothesized that a peripheral vertical tear of the lateral meniscus would alter joint mechanics, increasing contact pressure and area, and that more drastic effects would be seen following meniscectomy, at higher knee flexion angles, and with increased loads.
Study Design: Controlled laboratory study.
Methods: Ten fresh-frozen cadaveric knees (average age, 55 ± 12 years) were tested with 5 lateral meniscus states: intact, short vertical tear, extended vertical tear, posterior horn partial meniscectomy (rim intact), and posterior horn subtotal meniscectomy (rim excised). The specimens were loaded axially at knee flexion angles of 0, 30, and 60, and musculotendinous forces were applied, simulating a 2-legged squat. Intra-articular contact pressures were measured using pressure-sensitive Fuji film. Kinematic data were acquired through digitization of fiducial markers.
Results: Vertical tears did not cause a significant change in contact pressure or area. Partial meniscectomy increased maximum contact pressures in the lateral compartment at 30 and 60 from 5.3 MPa to 7.2 MPa and 7.6 MPa, respectively (P ¼ .02,P ¼ .007). Subtotal meniscectomy (8.4 MPa) significantly increased contact pressure compared with partial meniscectomy (7.6 MPa) at 60 (P ¼ .04). Both meniscectomy states significantly increased contact pressures with increasing flexion from 0 to 60 (P < .001, P < .001).
Conclusion: Vertical tears of the lateral meniscus during a simulated 2-legged squat did not significantly change contact pressures and areas compared with an intact meniscus. However, treating these tears with partial and complete meniscectomy significantly increased maximum contact pressures.
Clinical Relevance: Biomechanical evidence supports treating vertical lateral meniscus tears with meniscal-sparing techniques as opposed to meniscectomy, which may lead to progressive degenerative joint disease from altered joint biomechanics.

Keywords: lateral meniscus; meniscectomy; meniscal-sparing treatment; knee biomechanics

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

The Orthopaedic Journal of Sports Medicine

No. Panggil

-

Penerbit

: The Author., 2014

Deskripsi Fisik

The Orthopaedic Journal of Sports Medicine, 2(8), 2325967114541237

Bahasa

English

ISBN/ISSN

DOI: 10.1177/2325967

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KESEHATAN

Info Detail Spesifik

-

Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar