The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Young Mo Kim - One of the best experts on this subject based on the ideXlab platform.

  • pullout failure strength of the Posterior Horn of the medial meniscus with root ligament tear
    Knee Surgery Sports Traumatology Arthroscopy, 2013
    Co-Authors: Young Mo Kim, Yongbum Joo
    Abstract:

    To evaluate the reparability of the Posterior Horn of the medial meniscus with root ligament tear by measuring the actual pullout failure strength of a simple vertical suture of an arthroscopic subtotal meniscectomized Posterior Horn of the medial meniscus. From November 2009 to May 2010, nine Posterior Horns of the medial meniscus specimens were collected from arthroscopic subtotal meniscectomy performed as a treatment for root ligament rupture of the Posterior Horn of the medial meniscus. Simple vertical sutures were performed on the specimens, and pullout failure load was tested with a biaxial servohydraulic testing machine (Model 8874; Instron Corp., Norwood, MA, USA). The degree of degeneration, extrusion, and medial displacement of the medial meniscus were evaluated with magnetic resonance imaging (MRI). The Kellgren–Lawrence classification was used in standing plain radiography, and mechanical alignment was measured using orthoroentgenography. Tear morphology was classified into ligament proper type or meniscoligamentous junctional type according to the site of the torn root ligament of the Posterior Horn of the medial meniscus during arthroscopy. The mean pullout failure strength of the Posterior Horn of the medial meniscus was 71.6 ± 23.2 N (range, 41.4–107.7 N). The degree of degeneration of the Posterior Horn of the medial meniscus on MRI showed statistically significant correlation with pullout failure strength and Kellgren–Lawrence classification. Pullout failure strength showed correlation with mechanical alignment and Kellgren–Lawrence classification (P < 0.05). The measurement of pullout failure strength of the Posterior Horn of the medial meniscus with root ligament tear showed a degree of repairability. The degree of degeneration of the Posterior Horn of the medial meniscus on MRI showed a significant correlation with the pullout failure strength. The pullout failure strength was also not only correlated with the degree of degeneration of the Posterior Horn of the medial meniscus, but also with mechanical alignment and Kellgren-Lawrence classification, which represent bony degenerative change.

  • role of the mechanical axis of lower limb and body weight in the horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus
    International Orthopaedics, 2012
    Co-Authors: Young Mo Kim, Yongbum Joo, Soomin Cha, Jungmo Hwang
    Abstract:

    Purpose To compare and analyse the relationship between horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus (PHMM) and the degree of varus in the axis of lower limb and body weight.

  • role of the mechanical axis of lower limb and body weight in the horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus
    International Orthopaedics, 2012
    Co-Authors: Young Mo Kim, Yongbum Joo, Soomin Cha, Jungmo Hwang
    Abstract:

    To compare and analyse the relationship between horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus (PHMM) and the degree of varus in the axis of lower limb and body weight. One hundred and nineteen patients underwent surgical treatment as they were diagnosed with medial meniscus tear in our hospital from May 2006 to December 2009. Of these, 19 cases (group 1), underwent partial meniscectomy as they were confirmed to solely have horizontal tear of the PHMM on arthroscopic examination and 27 cases (group 2), underwent subtotal meniscectomy as they were confirmed to solely have root ligament tear of the PHMM on arthroscopic examination, were chosen for retrospective study. Standing radiographs were taken of every case prior to arthroscopic surgery to measure varus angle. Also, we checked body mass index (BMI) of two groups. The difference of varus angle and BMI between two groups were statistically verified using the Levene’s test, paired t-test. Group 1 showed mean value of varus angle of 2.30 ± 0.54, and BMI of 25.32 ± 3.23. Group 2 showed mean value of varus angle of 5.64 ± 0.54, and BMI of 25.67 ± 3.12. The degree of varus of group 2 was statistically significantly higher than group 1 (p = 0.002). Comparison between the BMI of two groups showed no statistical significance (p = 0.053). Through a comparative study of sole horizontal tear and root ligament tear of the PHMM, the authors have found that sole root ligament tear of the PHMM is more relative to the genu varum than sole horizontal tear of the PHMM. However, body weight was statistically irrelevant to the incidence of the two lesions.

  • arthroscopic pullout repair of a complete radial tear of the tibial attachment site of the medial meniscus Posterior Horn
    Arthroscopy, 2006
    Co-Authors: Young Mo Kim, Sungjae Kim, Kwangjin Rhee, Junekyu Lee, Deuk Soo Hwang, Junyoung Yang
    Abstract:

    Abstract We developed an effective arthroscopic pullout technique for repairing complete radial tears of the tibial attachment site of the medial meniscus Posterior Horn (MMPH). In our technique, the torn meniscus is reattached to the tibial plateau immediately medial or anteromedial to the Posterior cruciate ligament (PCL) using two No. 2 Ethibond sutures (Ethicon, Somerville, NJ). After a complete radial tear of the tibial attachment site of the MMPH and its reparability were confirmed, using a Caspari suture loaded with a suture shuttle, one No. 2 Ethibond suture is placed through the meniscus, through the red-red zone, 3 to 5 mm medial to the torn edge of the MMPH, and the other is passed through the meniscocapsular junction 3 to 5 mm medial to the torn edge of the meniscus. Then, a tibial tunnel, 5-mm in diameter, is made from the anteromedial aspect of the proximal tibia to the previously prepared tibial plateau, immediately medial or anteromedial to the PCL, and the two No. 2 Ethibond sutures are pulled out through the tibial tunnel and then fixed to the proximal tibia using a 3.5-mm cortical screw and washer. Firm reattachment of the torn meniscus was confirmed arthroscopically.

Sungjae Kim - One of the best experts on this subject based on the ideXlab platform.

  • Posterior Horn repair augmented with the central portion of thickened meniscus for large posterolateral corner loss type of discoid lateral meniscus
    Arthroscopy techniques, 2019
    Co-Authors: Sungjae Kim, Woohyuk Chang, Sukeon Lee, Juhwan Chung, Keun Jung Ryu, Sulgee Kim
    Abstract:

    Abstract Large posterolateral corner loss type of discoid lateral meniscus tear is unsalvageable. Therefore, subtotal meniscectomy has been the only treatment option in this case. However, long-term results of subtotal or total meniscectomy have shown a high prevalence of early degenerative changes. Persistent symptoms, such as increased pain, snapping, giving way, locking, and limited extension, can be attributed to progressive loss of Posterior tibial meniscal attachment and meniscal degeneration, especially in the Posterior Horn. The purpose of this technique-based article is to describe a partial repair, Posterior Horn repair augmented with the central portion of the discoid lateral meniscus that would have been removed if a subtotal meniscectomy were performed and bone marrow stimulation in the intercondylar notch to improve meniscal healing.

  • arthroscopic repair of the Posterior Horn of the medial meniscus with opening wedge high tibial osteotomy surgical technique
    Journal of Knee Surgery, 2009
    Co-Authors: Kwang Am Jung, Sungjae Kim, Su Chan Lee, Jaehoon Jeong, Moon Bok Song, Choon Key Lee
    Abstract:

    Simultaneous repair of a radial tear at the tibial attachment site of the Posterior Horn of the medial meniscus under special circumstances requiring tibial valgus osteotomy is technically difficult. First, most patients who need an osteotomy have a narrowed medial tibiofemoral joint space. In such a situation, the pull-out suture technique is more difficult to perform than in a normal joint space. Second, pulling out suture strands that penetrate the Posterior Horn of the medial meniscus to the anterior tibial cortex increases the risk of transection during osteotomy. We performed a meniscus repair combined with an opening wedge tibial valgus osteotomy without complications and present our technique as a new method for use in selective cases necessitating both meniscus repair of a complete radial tear and opening wedge tibial osteotomy.

  • new meniscus repair technique for peripheral tears near the Posterior tibial attachment of the Posterior Horn of the medial meniscus
    Arthroscopy, 2006
    Co-Authors: Inseop Park, Sungjae Kim
    Abstract:

    We introduce a suture technique to repair a peripheral tear near the Posterior tibial attachment of the Posterior Horn. A suture hook was inserted through the posteromedial portal, and the peripheral capsular rim was penetrated from superior to inferior by the sharp hook. Both relay limbs were brought out through the posteromedial portal. The outer limb of the superior peripheral capsular rim was identified with a hemostat. An 18-gauge spinal needle loaded with a No. 0 polydioxanone suture (PDS) was introduced into the joint from the anteromedial portal; it was passed through the joint space until it penetrated the inner torn meniscus. The PDS suture loaded within the needle was pushed into the joint and picked up through the posteromedial portal. The needle was pulled out of the torn meniscus and readvanced over it while the suture was kept loaded. The other limb of the suture from the tip of the spinal needle was retrieved through the posteromedial portal. The initial PDS suture limb was hooked to the shuttle-relay system; it then was passed through the inner torn meniscus and the peripheral capsular rim. The suture limb exiting from the peripheral capsular rim was used as a post and was joined to the other suture limb to form a sliding knot.

  • arthroscopic pullout repair of a complete radial tear of the tibial attachment site of the medial meniscus Posterior Horn
    Arthroscopy, 2006
    Co-Authors: Young Mo Kim, Sungjae Kim, Kwangjin Rhee, Junekyu Lee, Deuk Soo Hwang, Junyoung Yang
    Abstract:

    Abstract We developed an effective arthroscopic pullout technique for repairing complete radial tears of the tibial attachment site of the medial meniscus Posterior Horn (MMPH). In our technique, the torn meniscus is reattached to the tibial plateau immediately medial or anteromedial to the Posterior cruciate ligament (PCL) using two No. 2 Ethibond sutures (Ethicon, Somerville, NJ). After a complete radial tear of the tibial attachment site of the MMPH and its reparability were confirmed, using a Caspari suture loaded with a suture shuttle, one No. 2 Ethibond suture is placed through the meniscus, through the red-red zone, 3 to 5 mm medial to the torn edge of the MMPH, and the other is passed through the meniscocapsular junction 3 to 5 mm medial to the torn edge of the meniscus. Then, a tibial tunnel, 5-mm in diameter, is made from the anteromedial aspect of the proximal tibia to the previously prepared tibial plateau, immediately medial or anteromedial to the PCL, and the two No. 2 Ethibond sutures are pulled out through the tibial tunnel and then fixed to the proximal tibia using a 3.5-mm cortical screw and washer. Firm reattachment of the torn meniscus was confirmed arthroscopically.

Robert F Laprade - One of the best experts on this subject based on the ideXlab platform.

  • quantitative and qualitative assessment of the Posterior medial meniscus anatomy defining meniscal ramp lesions
    American Journal of Sports Medicine, 2019
    Co-Authors: Nicholas N Dephillipo, Gilbert Moatshe, Jorge Chahla, Zachary S Aman, Hunter W Storaci, Elizabeth R Morris, Colin Robbins, Lars Engebretsen, Robert F Laprade
    Abstract:

    Background:Meniscal ramp lesions have been defined as a tear of the peripheral attachment of the Posterior Horn of the medial meniscus (PHMM) at the meniscocapsular junction or an injury to the men...

  • altered tibiofemoral contact mechanics due to lateral meniscus Posterior Horn root avulsions and radial tears can be restored with in situ pull out suture repairs
    Journal of Bone and Joint Surgery American Volume, 2014
    Co-Authors: Christopher M Laprade, Kyle S Jansson, Grant J Dornan, Sean D Smith, Coen A Wijdicks, Robert F Laprade
    Abstract:

    Background: An avulsion of the Posterior root attachment of the lateral meniscus or a radial tear close to the root attachment can lead to degenerative knee arthritis. Although the biomechanical effects of comparable injuries involving the medial meniscus have been studied, we are aware of no such study involving the lateral meniscus. We hypothesized that in situ pull-out suture repair of lateral meniscus root avulsions and of complete radial tears 3 and 6 mm from the root attachment would increase the contact area and decrease mean and peak tibiofemoral contact pressures, at all knee flexion angles, relative to the corresponding avulsion or tear condition. Methods: Eight human cadaveric knees underwent biomechanical testing. Eight lateral meniscus conditions (intact, footprint tear, root avulsion, root avulsion repair, radial tears at 3 and 6 mm from the Posterior root, and repairs of the 3 and 6-mm tears) were tested at five different flexion angles (0°, 30°, 45°, 60°, and 90°) under a compressive 1000-N load. Results: Avulsion of the Posterior root of the lateral meniscus or an adjacent radial tear resulted in significantly decreased contact area and increased mean and peak contact pressures in the lateral compartment, relative to the intact condition, in all cases except the root avulsion condition at 0° of flexion. In situ pull-out suture repair of the root avulsion or radial tear significantly reduced mean contact pressures, relative to the corresponding avulsion or tear condition, when the results for each condition were pooled across all flexion angles. Conclusions: Posterior Horn root avulsions and radial tears adjacent to the root attachment of the lateral meniscus significantly increased contact pressures in the lateral compartment. In situ pull-out suture repairs of these tears significantly improved lateral compartment joint contact pressures. Clinical Relevance: In situ repair may be an effective treatment to improve tibiofemoral contact profiles after an avulsion of the Posterior root of the lateral meniscus or a complete radial tear adjacent to the root. In situ repairs should be further investigated clinically as an alternative to partial lateral meniscectomy.

Choon Key Lee - One of the best experts on this subject based on the ideXlab platform.

Jungmo Hwang - One of the best experts on this subject based on the ideXlab platform.

  • role of the mechanical axis of lower limb and body weight in the horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus
    International Orthopaedics, 2012
    Co-Authors: Young Mo Kim, Yongbum Joo, Soomin Cha, Jungmo Hwang
    Abstract:

    Purpose To compare and analyse the relationship between horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus (PHMM) and the degree of varus in the axis of lower limb and body weight.

  • role of the mechanical axis of lower limb and body weight in the horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus
    International Orthopaedics, 2012
    Co-Authors: Young Mo Kim, Yongbum Joo, Soomin Cha, Jungmo Hwang
    Abstract:

    To compare and analyse the relationship between horizontal tear and root ligament tear of the Posterior Horn of the medial meniscus (PHMM) and the degree of varus in the axis of lower limb and body weight. One hundred and nineteen patients underwent surgical treatment as they were diagnosed with medial meniscus tear in our hospital from May 2006 to December 2009. Of these, 19 cases (group 1), underwent partial meniscectomy as they were confirmed to solely have horizontal tear of the PHMM on arthroscopic examination and 27 cases (group 2), underwent subtotal meniscectomy as they were confirmed to solely have root ligament tear of the PHMM on arthroscopic examination, were chosen for retrospective study. Standing radiographs were taken of every case prior to arthroscopic surgery to measure varus angle. Also, we checked body mass index (BMI) of two groups. The difference of varus angle and BMI between two groups were statistically verified using the Levene’s test, paired t-test. Group 1 showed mean value of varus angle of 2.30 ± 0.54, and BMI of 25.32 ± 3.23. Group 2 showed mean value of varus angle of 5.64 ± 0.54, and BMI of 25.67 ± 3.12. The degree of varus of group 2 was statistically significantly higher than group 1 (p = 0.002). Comparison between the BMI of two groups showed no statistical significance (p = 0.053). Through a comparative study of sole horizontal tear and root ligament tear of the PHMM, the authors have found that sole root ligament tear of the PHMM is more relative to the genu varum than sole horizontal tear of the PHMM. However, body weight was statistically irrelevant to the incidence of the two lesions.