Knee mechanics after repair of the anterior cruciate ligament A cadaver study of ligament augmentation

Engebretsen, Lars; Lew, William D.; Lewis, Jack L.; Hunter, Robert E.

doi:10.3109/17453678909149609

Cited by 47 publications

(28 citation statements)

References 7 publications

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“…Investigations have shown that full extension of the knee by a quadriceps muscle contraction can produce resultant forces in the ACL or the graft of up to 200 N. 13,21 Using this load, there was no difference between the elongation of the interference and the cross pin group. Other investigations showed much higher forces the ACL or the graft has to withstand.…”

Section: Discussionmentioning

confidence: 97%

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Initial Fixation Strength of Two Bioabsorbable Pins for the Fixation of Hamstring Grafts Compared to Interference Screw Fixation

et al. 2004

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Section: Discussionmentioning

confidence: 97%

“…13,16,17,20,22 The mean age of the animals was 28 weeks ± 2 weeks. The material was obtained from a local butcher, fresh frozen at -20°and thawed for 12 hours at room temperature before testing.…”

Section: Biomechanical Modelmentioning

confidence: 99%

Initial Fixation Strength of Two Bioabsorbable Pins for the Fixation of Hamstring Grafts Compared to Interference Screw Fixation

et al. 2004

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“…1,[5][6][7] One of the most important surgical steps in this technique is to determine where the femoral tunnel should be located and how to make it. [8][9][10] This tunnel needs to be constructed in such a way as to allow the graft to be positioned as close as possible to an isometric situation during flexion and extension of the knee. [10][11][12][13][14][15] The femoral tunnel position in the intercondyle notch that is considered to be most satisfactory is posterosuperior and at 30° laterally to the central position of the intercondyle tunnel (11 o'clock for the right knee and 1 o'clock for the left knee).…”

Section: Introductionmentioning

confidence: 99%

Positioning of the Femoral Tunnel for Arthroscopic Reconstruction of the Anterior Cruciate Ligament: Comparative Study of 2 Techniques

Albuquerque

Amatuzzi

Pacheco

et al. 2007

Clinics

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. Positioning of the femoral tunnel for arthroscopic reconstruction of the anterior cruciate ligament: comparative study of 2 techniques. Clinics. 2007;62(5):613-8. OBJECTIVE:To compare the accuracy of positioning of the femoral tunnel in reconstructing the anterior cruciate ligament by means of 2 techniques: tibial tunnel and anteromedial portal. METHOD: Femoral tunnels were drilled in 20 knees from human cadavers by means of arthroscopy. Group I had the femoral tunnel drilled via a trans-tibial tunnel, and Group II via the anteromedial portal. Four variables were measured: A) posterior wall thickness; B) tunnel positioning at the notch; C) tunnel inclination in relation to the femoral axis; and D) distance between the wire guide exit and the lateral epicondyle. RESULTS: As above, respectively, A) 2.23 mm for group I and 2.36 mm for group II (P =.54); B) 25.5° for group I and 30.0° for group II (P =.23); C) 23.9° for group I and 32.0° for group II (P =.02); D) 7.8 cm for group I and 3.9 cm for group II (P <.001). CONCLUSIONS: Both techniques achieved the desired positioning for the femoral tunnel entrance and satisfactory thickness for the posterior cortex. Drilling via the anteromedial portal may provide greater protection against rupture of the posterior wall.

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“…The peroperative tension introduced on the ligament substitute has been the subject of increasing attention in the past decade [2,5,7,8,13].…”

Section: Introductionmentioning

confidence: 99%

The anterior cruciate ligament does play a role in controlling axial rotation in the knee

Andersen

Dyhre‐Poulsen

1997

Knee Surgery, Sports Traumatology, Arthroscopy

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This study deals with the influence of peroperative ligament tension on total tibial rotation at different knee flexion angles. Fourteen human cadaver knees with a mean age of 56 years (range 42-84 years) were examined. The cadaver knees were subjected to internal/external (i/e) rotational torque of 6 Nm, at 10, 30, 50, 70 and 90 deg of knee flexion. The mean total i/e rotation with the anterior cruciate ligament (ACL) intact at 10 deg of knee flexion was 30.4 deg and after removing the ACL, 33.1 deg. At 10 and 30 deg of knee flexion, the increase in i/e rotation was significant, while there was no significant difference in mean values at greater knee flexion. Ligament reconstruction with a tension of 5 N at 30 deg of knee flexion using either the over the top or through the femoral condyle reconstructive procedure restored normal tibial rotation. With increased graft tension the knee motion was increasingly restricted at low angles of knee flexion. Our results indicate that the ACL does play a role in limiting axial rotation, and even minor tensioning forces introduced in any of the two ACL reconstructions used produced restricted knee motion.

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Knee mechanics after repair of the anterior cruciate ligament A cadaver study of ligament augmentation

Cited by 47 publications

References 7 publications

Initial Fixation Strength of Two Bioabsorbable Pins for the Fixation of Hamstring Grafts Compared to Interference Screw Fixation

Initial Fixation Strength of Two Bioabsorbable Pins for the Fixation of Hamstring Grafts Compared to Interference Screw Fixation

Positioning of the Femoral Tunnel for Arthroscopic Reconstruction of the Anterior Cruciate Ligament: Comparative Study of 2 Techniques

The anterior cruciate ligament does play a role in controlling axial rotation in the knee

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