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Tsutsumi M, Kanazawa S, Nimura A, Akita K, Kudo S. In vivo movement interrelationships among the medial meniscus, joint capsule, and semimembranosus during tibial rotation. Sci Rep 2024; 14:17022. [PMID: 39043858 PMCID: PMC11266535 DOI: 10.1038/s41598-024-68088-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 07/19/2024] [Indexed: 07/25/2024] Open
Abstract
The meniscal position within the knee is critical to maintain normal knee function. The joint capsule might dynamically coordinate the medial meniscus (MM) by transmitting a semimembranosus action. However, their interrelationships in vivo are unclear. We aimed to determine relationships among the MM, joint capsule, and semimembranosus during passive tibial external-internal and isometric tibial internal rotation at the medial and posteromedial knees of 10 healthy individuals in vivo using ultrasound. We analyzed images of the MM and joint capsule locations at the medial and posteromedial knee and the velocity waveform similarity of each structure during rotational tasks. Both isometric internal rotation with semimembranosus action and passive tibial external rotation displaced the MM inward at the medial knee. The MM and joint capsule during these MM displacements coordinately moved with more than moderate cross-correlation coefficients (passive external and isometric internal rotations, ≥ 0.54 and ≥ 0.90, respectively). The movements of the MM and joint capsule to the semimembranosus during isometric internal rotation also coordinated with moderate cross-correlation coefficients (≥ 0.62). Therefore, the joint capsule might dynamically coordinate the MM by transmitting semimembranosus action. Whether increased tibial internal rotation or semimembranosus shortening causes MM extrusion awaits further investigation.
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Affiliation(s)
- Masahiro Tsutsumi
- Inclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, 1-26-16 Nankokita, Suminoe-Ku, Osaka City, Osaka, 559-8611, Japan.
- Department of Physical Therapy, Morinomiya University of Medical Sciences, Osaka, Japan.
- Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Seiya Kanazawa
- Department of Physical Therapy, Morinomiya University of Medical Sciences, Osaka, Japan
| | - Akimoto Nimura
- Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keiichi Akita
- Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shintarou Kudo
- Inclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, 1-26-16 Nankokita, Suminoe-Ku, Osaka City, Osaka, 559-8611, Japan
- Department of Physical Therapy, Morinomiya University of Medical Sciences, Osaka, Japan
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Horita K, Okada Y, Shiwaku K, Yamakawa S, Mori Y, Kamiya T, Emori M, Watanabe K, Fujie H, Teramoto A. High tibial osteotomy alone does not decrease medial meniscus extrusion in the setting of medial meniscus posterior root tear: A cadaveric study. Arthroscopy 2024:S0749-8063(24)00486-9. [PMID: 38986854 DOI: 10.1016/j.arthro.2024.06.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 06/06/2024] [Accepted: 06/18/2024] [Indexed: 07/12/2024]
Abstract
PURPOSE This study investigated whether inducing valgus alignment and shifting the load laterally through high tibial osteotomy (HTO) alone decreases the extent of medial meniscus extrusion (MME) in the setting of medial meniscus posterior root tear(MMPRT) using ultrasound evaluation. METHODS Eight fresh-frozen human cadaveric knee specimens were tested using a six-degree-of-freedom robotic testing system and ultrasound. Each specimen was tested in five conditions: (1) intact, (2) MMPRT, (3) medial meniscus repair (MMR), (4) combined medial open-wedge HTO + MMR, and (5) HTO + MMPRT. Measurements were obtained over the medial collateral ligament (MCL, central image) and posterior to the MCL (posterior image) with a 250 N axial load at 0°, 30°, and 90° of knee flexion. Statistical analysis was performed using a two-factor repeated-measures ANOVA. RESULTS MME was significantly greater in HTO + MMPRT(0°: 2.44 ± 0.41mm, 30°: 2.47 ± 0.37mm, 90°: 2.41 ± 0.28mm) than HTO + MMR in central images (mean difference +0.83 mm, p < .001). No significant difference was found between HTO + MMPRT and MMPRT in MME . MMR had significantly less MME than MMPRT (mean difference -0.58mm, p < .001, posterior image at 0°and central image at 90°, p=.002). HTO + MMR showed significantly less MME than MMR alone at 30° and 90° knee flexion in central image (30°: -0.38 ± 0.05mm, 90°: -0.45 ± 0.06mm, p < .001) and 90° knee flexion in posterior image (-0.38 ± 0.08mm, p = .004). CONCLUSION HTO alone did not decrease MME in the setting of MMPRT, while MMR alone decrease MME after MMPRT. Additionally, HTO + MMR decreases MME aftrer MMPRT compared to MMR alone, although the clinical significance was uncertain. CLINICAL RELEVANCE The findings of this study provide clinicians with valuable insights for improving MME. HTO alone does not decrease MME in cases of MMPRT.
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Affiliation(s)
- Kazushi Horita
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan
| | - Yohei Okada
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan.
| | - Kousuke Shiwaku
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan
| | - Satoshi Yamakawa
- Department of Sports Medical Biomechanics, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Yuta Mori
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan
| | - Tomoaki Kamiya
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan
| | - Makoto Emori
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan
| | - Kota Watanabe
- Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Hiromichi Fujie
- Department of Mechanical Engineering, Graduate School of Science, Tokyo Metropolitan University, Tokyo, Japan
| | - Atsushi Teramoto
- Department of orthopaedic surgery, Sapporo Medical University School of Medicine, South1 West16, Chuo-ku, Sapporo, 060-8543, Japan
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Meng XY, Li ZQ, Ding HF, Wang DY, Dai LH, Jiang D. A Novel Ultrasound Method of Evaluating Dynamic Extrusion of Lateral Meniscus in Healthy Population: Different Patterns of Dynamic Extrusion Revealed Between Lateral and Medial Meniscus. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2024. [PMID: 38975721 DOI: 10.1002/jum.16507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 05/21/2024] [Accepted: 05/27/2024] [Indexed: 07/09/2024]
Abstract
OBJECTIVES To establish a reliable ultrasound (US) method of evaluating dynamic extrusion of lateral meniscus in healthy population, and to investigate the pattern of dynamic meniscus extrusion (ME) in lateral meniscus under loading conditions. METHODS The lateral ME was examined via US method in unloaded, double-leg standing, and single-leg standing positions. Two different US measurement methods were compared to the magnetic resonance imaging (MRI) results to determine the optimal measurement methods. The US results obtained by different researchers were tested for interobserver consistency and the results obtained by the same researcher on two separate days were tested for intraobserver consistency. The patterns of dynamic extrusion were compared between medial and lateral sides. RESULTS A total of healthy 44 volunteers were included in the study, with 86 knees assessed by US, and 25 knees evaluated by MRI. The US evaluation of dynamic lateral ME demonstrated excellent interobserver and intraobserver reliability. The US measurements using method A were consistent with the MRI results with no significant difference (P = .861, intraclass correlation coefficient [ICC] = 0.868), while method B underestimated the lateral ME compared to MRI (P = .001, ICC = 0.649). Lateral ME decreased slightly from unloaded (1.0 ± 0.8 mm) to single-leg standing position (0.8 ± 0.8 mm), whereas medial ME increased significantly in both double-leg and single-leg standing positions (2.4 ± 0.7 mm, 2.6 ± 0.7 mm). CONCLUSION A novel US evaluation method of lateral ME was established with reliable and accurate results compared to the MRI. Lateral ME in healthy populations decreased slightly as the loadings increased, which was different from the pattern of dynamic extrusion in medial meniscus.
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Affiliation(s)
- Xiang-Yu Meng
- Department of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Institute of Sports Medicine, Peking University, Beijing, China
| | - Zhi-Qiang Li
- Department of Ultrasound Medicine, Peking University Third Hospital, Beijing, China
| | - Hong-Fu Ding
- Department of Ultrasound Medicine, People's Hospital of Ningxia Autonomous Region, Yinchuan, China
| | - Ding-Yu Wang
- Department of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Institute of Sports Medicine, Peking University, Beijing, China
| | - Ling-Hui Dai
- Department of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Dong Jiang
- Department of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Institute of Sports Medicine, Peking University, Beijing, China
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Farivar D, Hevesi M, Fortier LM, Azua E, LaPrade RF, Chahla J. Meniscal Extrusion Measurements After Posterior Medial Meniscus Root Tears: A Systematic Review and Meta-analysis. Am J Sports Med 2023; 51:3325-3334. [PMID: 36541434 DOI: 10.1177/03635465221131005] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Meniscal extrusion has become increasingly utilized when evaluating meniscus root abnormalities. However, no consensus definition or approach exists on how to measure extrusion. PURPOSE/HYPOTHESIS The purpose of this study was to evaluate the extent of heterogeneity in meniscal extrusion measurement techniques and reported extrusion values in knees with posterior medial meniscus root tears (PMMRTs). We hypothesized that meniscal extrusion measurement techniques would vary considerably throughout reported studies, with resultant wide-ranging published extrusion values. STUDY DESIGN Systematic review; Level of evidence, 4. METHODS A systematic review was conducted according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement. The inclusion criteria consisted of all clinical and cadaveric studies reporting on meniscal extrusion after PMMRTs, excluding studies lacking data in full extension, those presenting only semiquantitative analyses, articles reporting only differences in meniscal extrusion, and review articles. RESULTS A total of 45 studies were included. Imaging modality types included magnetic resonance imaging (89%), 3-dimensional reconstruction with computed tomography (7%), linear displacement transducers (2%), and a combination of magnetic resonance imaging and ultrasound (2%). The 3 most commonly used landmarks to acquire coronal images for meniscal extrusion measurements were the medial collateral ligament (38%), the midpoint of the anterior-posterior length of the medial meniscus (23%), and the middle of the medial femoral condyle (19%). The pooled mean extrusion values according to the measurement location were 3.5 ± 0.7 mm, 3.9 ± 0.8 mm, and 4.5 ± 2.1 mm, respectively, with no significant differences noted between the modality types (P = .23). The pooled mean meniscal extrusion from all included studies was 3.2 ± 2.0 mm. CONCLUSION Substantial variation exists in measurement techniques for meniscal extrusion, particularly as it relates to the coronal cross-sectional reference location. Further studies should aim to provide clear descriptions of the measurement method and have uniform measurement methodology to allow comparisons and pooling between studies.
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Affiliation(s)
| | - Mario Hevesi
- Midwest Orthopaedics at Rush University, Chicago, Illinois, USA
| | - Luc M Fortier
- Midwest Orthopaedics at Rush University, Chicago, Illinois, USA
| | - Eric Azua
- Rush University Medical College, Chicago, Illinois, USA
| | | | - Jorge Chahla
- Midwest Orthopaedics at Rush University, Chicago, Illinois, USA
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Zhang X, Furumatsu T, Hiranaka T, Okazaki Y, Xue H, Kintaka K, Miyazawa S, Ozaki T. The stability of repaired meniscal root can affect postoperative cartilage status following medial meniscus posterior root repair. J Orthop Sci 2023; 28:1060-1067. [PMID: 36089432 DOI: 10.1016/j.jos.2022.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 06/15/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND Transtibial pullout repair yields beneficial clinical outcomes in patients with medial meniscus (MM) posterior root tear. However, the relationship between repaired meniscal root healing status and postoperative clinical outcomes remains unclear. We aimed to evaluate changes in articular cartilage damage and clinical scores after pullout repair using two simple stitches (TSS). METHODS Thirty-three patients who underwent pullout repair using TSS were assessed. Healing status was assessed by a semi-quantitative second-look arthroscopic scoring system comprising three evaluation criteria (width of bridging tissues, stability of the repaired root, and synovial coverage), 1 year postoperatively. MM medial extrusion (MMME) and cartilage damage were assessed preoperatively and 1 year postoperatively. The medial compartment was divided into 8 zones (A-H) for comparison of preoperative and 1-year postoperative cartilage damage. Clinical outcomes were evaluated using the Knee Injury and Osteoarthritis Outcome score, Lysholm score, International Knee Documentation Committee scores, and visual analogue scale pain score. RESULTS Although cartilage damage did not aggravate significantly in most medial compartment areas, MMME progressed at 1 year postoperatively. No statistical differences were observed in cartilage damage between the central-to-medial area of the medial femoral condyle and the medial tibial plateau area at 1 year postoperatively. Regarding semi-quantitative healing scores, the stability score was significantly correlated with the International Cartilage Repair Society grade at 1 year postoperatively. All 1-year and 2-year clinical scores significantly improved compared with the preoperative scores. CONCLUSION Regarding TSS repair, stability of repaired meniscal root negatively correlated with cartilage damage in the medial compartment loading area. All 1-year and 2-year clinical scores significantly improved than those of the preoperative scores. Achieving MM stability is crucial for suppressing cartilage degeneration. LEVEL OF EVIDENCE IV case series study.
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Affiliation(s)
- Ximing Zhang
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan.
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
| | - Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
| | - Haowei Xue
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
| | - Keisuke Kintaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
| | - Shinichi Miyazawa
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan
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Pirri C, Stecco C, Güvener O, Mezian K, Ricci V, Jačisko J, Novotný T, Kara M, Chang KV, Dughbaj M, Jain NB, Özçakar L. EURO-MUSCULUS/USPRM Dynamic Ultrasound Protocols for Knee. Am J Phys Med Rehabil 2023; 102:e67-e72. [PMID: 36729007 DOI: 10.1097/phm.0000000000002173] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
ABSTRACT In this dynamic scanning protocol, ultrasound examination of the knee is described using various maneuvers to assess different conditions. Real-time patient examination and scanning videos are used for better simulation of the daily clinical practice. The protocol is prepared by several/international experts in the field of musculoskeletal ultrasound and within the umbrella of European Musculoskeletal Ultrasound Study Group in Physical and Rehabilitation Medicine/Ultrasound Study Group of the International Society of Physical and Rehabilitation Medicine.
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Affiliation(s)
- Carmelo Pirri
- From the Department of Neurosciences, Institute of Human Anatomy, University of Padova, Padova, Italy (CP, CS); Mersin University Medical School, Department of Physical and Rehabilitation Medicine, Mersin, Turkey (OG); Department of Rehabilitation Medicine, Charles University, First Faculty of Medicine, Prague, Czech Republic (KM); Physical and Rehabilitation Medicine Unit, Luigi Sacco University Hospital, ASST Fatebenefratelli-Sacco, Milan, Italy (VR); Department of Rehabilitation and Sports Medicine, Second Faculty of Medicine, Charles University and University Hospital Motol, Prague, Czech Republic (JJ); Department of Orthopaedics, University J.E. Purkinje, Masaryk Hospital, Usti nad Labem, Czech Republic (TN); Hacettepe University Medical School, Department of Physical and Rehabilitation Medicine, Ankara, Turkey (MK, LÖ); Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei, Taiwan (K-VC); National Taiwan University College of Medicine, Taipei, Taiwan (K-VC); Physical Medicine and Rehabilitation Hospital, Ministry of Health, Kuwait (MD); and Departments of Physical Medicine and Rehabilitation, Orthopaedics, and Population and Data Sciences, University of Texas Southwestern, Dallas, Texas (NBJ)
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Farivar D, Knapik DM, Vadhera AS, Condron NB, Hevesi M, Shewman EF, Ralls M, White GM, Chahla J. Quantifying Meniscal Extrusion Using Ultrasound in the Setting of Concomitant Cadaveric Knee Lesions: Part I: The Medial Meniscotibial Ligament and Posterior Medial Meniscal Root. Arthroscopy 2023:S0749-8063(23)00169-X. [PMID: 36813009 DOI: 10.1016/j.arthro.2023.01.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 01/05/2023] [Accepted: 01/08/2023] [Indexed: 02/24/2023]
Abstract
PURPOSE 1. Evaluate how the meniscotibial ligament (MTL) affects meniscal extrusion (ME) +/- concomitant posterior medial meniscal root (PMMR) tears. 2. Describe how ME varied along length of meniscus. METHODS ME was measured using ultrasonography in 10 human cadaveric knees in conditions: (1) control, either (2a) isolated MTL sectioning, or (2b) isolated PMMR tear, (3) combined PMMR + MTL sectioning, and (4) PMMR repair. Measurements were obtained 1 cm anterior to the MCL (anterior), over the MCL (middle), and 1 cm posterior to the MCL (posterior) +/- 1000N axial loads in 0° and 30° flexion. RESULTS At 0°, MTL sectioning demonstrated greater middle than anterior (P<0.001) and posterior (P<0.001) ME, while PMMR (P=0.0042) and PMMR+MTL (P<0.001) sectioning demonstrated greater posterior than anterior ME. At 30°, PMMR (P<0.001) and PMMR+MTL (P<0.001) sectioning demonstrated greater posterior than anterior ME, and PMMR (P=0.0012) and PMMR+MTL (P=0.0058) sectioning demonstrated greater posterior than anterior ME. PMMR+MTL sectioning demonstrated greater posterior ME at 30° compared to 0° (P=0.0320). MTL sectioning always resulted in greater middle ME (P<0.001), in contrast with no middle ME changes following PMMR sectioning. At 0°, PMMR sectioning resulted in greater posterior ME (P<0.001), but at 30°, both PMMR and MTL sectioning resulted in greater posterior ME (P<0.001). Total ME surpassed 3 mm only when both the MTL and PMMR were sectioned. CONCLUSION The MTL and PMMR contribute most to ME when measured posterior to the MCL at 30° of flexion. ME greater than 3 mm is suggestive of combined PMMR + MTL lesions. CLINICAL RELEVANCE Overlooked MTL pathology may contribute to persistent ME following PMMR repair. We found isolated MTL tears able to cause 2-2.99 mm of ME, but the clinical significance of these magnitudes of extrusion is unclear. The use of ME measurement guidelines with ultrasound may allow for practical MTL and PMMR pathology screening and pre-operative planning.
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Affiliation(s)
- Daniel Farivar
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA
| | - Derrick M Knapik
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA
| | - Amar S Vadhera
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA
| | - Nolan B Condron
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA
| | - Mario Hevesi
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA
| | - Elizabeth F Shewman
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA
| | - Michael Ralls
- Department of Diagnostic Radiology and Nuclear Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Gregory M White
- Department of Diagnostic Radiology and Nuclear Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Jorge Chahla
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL USA.
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Farivar D, Knapik DM, Vadhera AS, Condron NB, Hevesi M, Shewman EF, Ralls M, White GM, Chahla J. Isolated Posterior Lateral Meniscofemoral Ligament Tears Show Greater Meniscal Extrusion in Knee Extension, and Isolated Posterior Lateral Meniscal Root Tears Show Greater Meniscal Extrusion at 30° Using Ultrasound: A Cadaveric Study. Arthroscopy 2023:S0749-8063(23)00171-8. [PMID: 36813008 DOI: 10.1016/j.arthro.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 02/24/2023]
Abstract
PURPOSE To quantify the effects that posterior meniscofemoral ligament (pMFL) lesions have on lateral meniscal extrusion (ME) both with and without concomitant posterior lateral meniscal root (PLMR) tears and describe how lateral ME varied along the length of the lateral meniscus. METHODS Ultrasonography was used to measure ME of human cadaveric knees (n = 10) under the following conditions: control, isolated pMFL sectioning, isolated PLMR sectioning, pMFL+PLMR sectioning, and PLMR repair. ME was measured anterior to the fibular collateral ligament (FCL), at the FCL, and posterior to the FCL in both unloaded and axially loaded states at 0° and 30° of flexion. RESULTS Isolated and combined pMFL and PLMR sectioning consistently demonstrated significantly greater ME when measured posterior to the FCL compared with other image locations. Isolated pMFL tears demonstrated greater ME at 0° compared with 30° of flexion (P < .05), whereas isolated PLMR tears demonstrated greater ME at 30° compared with 0° of flexion (P < .001). All specimens with isolated PLMR deficiencies demonstrated greater than 2 mm of ME at 30° flexion, whereas only 20% of specimens did so at 0°. When the pMFL was sectioned following an isolated PLMR tear, there was a significant increase in ME at 0° (P < .001). PLMR repair after combined sectioning restored ME to levels similar to that of controls in all specimens when measured at and posterior to the FCL (P < .001). CONCLUSIONS The pMFL protects against ME primarily in full extension, whereas the presence of ME in the setting of PLMR injuries may be better appreciated in knee flexion. With combined tears, isolated repair of the PLMR can restore near-native meniscus position. CLINICAL RELEVANCE The stabilizing properties of intact pMFL may mask the presentation of PLMR tears and delay appropriate management. Additionally, the MFL is not routinely assessed during arthroscopy due to difficult visualization and access. Understanding the ME pattern of these pathologies in isolation and combination may improve detection rates so that the source of patients' symptoms can be addressed to satisfaction.
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Affiliation(s)
- Daniel Farivar
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Derrick M Knapik
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Amar S Vadhera
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Nolan B Condron
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Mario Hevesi
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Elizabeth F Shewman
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Michael Ralls
- Department of Diagnostic Radiology and Nuclear Medicine, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Gregory M White
- Department of Diagnostic Radiology and Nuclear Medicine, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Jorge Chahla
- Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, Illinois, U.S.A..
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9
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Yoshizuka H, Taniguchi T, Fukuta K, Mitsutake T, Honda S. Decrease in medial meniscal extrusion after physical therapy to improve knee pain and range of motion in patients with knee osteoarthritis: A retrospective study. PLoS One 2022; 17:e0277628. [PMID: 36449464 PMCID: PMC9710842 DOI: 10.1371/journal.pone.0277628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 10/31/2022] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Medial meniscal extrusion (MME) is the medial displacement of the meniscus, which extends beyond the tibial margin. Studies have shown an association between MME and knee pain and that surgical treatment can reduce the extent of MME. Here, we describe the beneficial effects of physical therapy as a feasible conservative treatment for MME. METHODS Data of 30 patients with knee osteoarthritis who underwent stretching of the semimembranosus tendon and passive range of motion (ROM) exercises twice a week for 8 weeks were retrospectively analyzed. MME was the measured distance between the medial meniscus and the line connecting the medial borders of the femur and tibia using ultrasound. Ultrasound findings of surrounding tissues, including the deep posterior bundle of the medial collateral ligament (dMCL), were recorded. Additionally, knee extension ROM was measured, and inner knee pain when walking was evaluated using a numerical rating scale. RESULTS There were significant improvements between the baseline and 8 weeks for MME in the non-weight-bearing position (3.6 ± 0.3 mm vs. 3.0 ± 0.4 mm), MME in the weight-bearing position (4.3 ± 0.4 mm vs. 3.8 ± 0.5 mm), ROM (-12.3° ± 4.1° vs. -3.1° ± 3.8°), and knee pain (7.0 ± 0.9 vs. 1.1 ± 1.4) (each p < 0.001). In almost all cases in which the knee extension ROM improved, the dMCL was bulging at the baseline; after 8 weeks, the dMCL was flattened, suggesting ligament tension on ultrasound imaging. CONCLUSION Stretching of the semimembranosus tendon and passive ROM exercises may reduce the extent of MME in patients with knee osteoarthritis. The ultrasound findings suggest that improvement in knee extension ROM may have led to the re-acquisition of MCL tension, which may have influenced MME reduction. Therefore, physical therapy may be a feasible conservative treatment for the reduction of MME.
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Affiliation(s)
- Hisayoshi Yoshizuka
- Department of Physical Therapy, Fukuoka International University of Health and Welfare, Fukuoka City, Fukuoka, Japan
- * E-mail:
| | - Takanori Taniguchi
- Department of Physical Therapy, Fukuoka International University of Health and Welfare, Fukuoka City, Fukuoka, Japan
| | - Kensuke Fukuta
- Department of Rehabilitation Medicine, Honda Orthopedic Clinic, Saga City, Saga, Japan
| | - Tsubasa Mitsutake
- Department of Physical Therapy, Fukuoka International University of Health and Welfare, Fukuoka City, Fukuoka, Japan
| | - Shigenobu Honda
- Department of Orthopedic Surgery, Honda Orthopedic Clinic, Saga City, Saga, Japan
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10
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Condron NB, Knapik DM, Gilat R, Vadhera AS, Farivar D, Shewman EF, Yanke AB, Chahla J, Cole BJ. Concomitant Meniscotibial Ligament Reconstruction Decreases Meniscal Extrusion Following Medial Meniscus Allograft Transplantation: A Cadaveric Analysis. Arthroscopy 2022; 38:3080-3089. [PMID: 35772603 DOI: 10.1016/j.arthro.2022.06.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 06/03/2022] [Accepted: 06/06/2022] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare meniscal extrusion (ME) following medial meniscus allograft transplantation (MMAT) with and without meniscotibial ligament reconstruction (MTLR). METHODS Ten cadaveric knees were size-matched with meniscus allografts. MMAT was performed via bridge-in-slot technique. Specimens were mounted in a testing system and ME was assessed via ultrasound anterior, directly over, and posterior to the medial collateral ligament at the joint line under 4 testing conditions: (1) 0° flexion and 0 newtons (N) of axial load, (2) 0° and 1,000 N, (3) 30° and 0 N, and (4) 30° and 1,000 N. For each condition, "mean total extrusion" was calculated by averaging measurements at each position. Next, MTLR was performed using 2 inside-out sutures through the remnant allograft meniscotibial ligament and secured to the tibia using anchors. The testing protocol was repeated. Differences in ME between MMAT alone versus MMAT + MTLR were examined. Within-group differences between the measurement positions, loading states, and flexion angles also were assessed. RESULTS "Mean total extrusion" was greater following MMAT alone (2.56 ± 1.23 mm) versus MMAT + MTLR (2.14 ± 1.07 mm; P = .005) in the loaded state at 0° flexion. ME directly over the MCL was greater following MMAT alone (3.51 ± 1.00 mm) compared with MMAT + MTLR (2.93 ± 0.79 mm; P = .054). Posteriorly, in the loaded state at 0°, ME was greater following MMAT alone (2.43 ± 1.10 mm) compared with MMAT + MTLR (1.96 ± 0.99 mm; P = .010). In all conditions, ME was greater in the loaded state versus the unloaded state. CONCLUSIONS Following MMAT, the addition of MTLR significantly reduced overall ME when compared with isolated MMAT during loading at 0° of flexion in a cadaveric model; given the small absolute values of change in extrusion, clinical significance cannot be gleaned from these findings. CLINICAL RELEVANCE During medial meniscus allograft transplantation, augmentation with meniscotibial ligament reconstruction may limit meniscal extrusion and improve the biomechanical milieu of the knee joint following transplant.
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Affiliation(s)
- Nolan B Condron
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Derrick M Knapik
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A.; Department of Orthopaedic Surgery, Washington University in St. Louis, St. Louis, Missouri, U.S.A
| | - Ron Gilat
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A.; Department of Orthopedic Surgery, Shamir Medical Center, Israel
| | - Amar S Vadhera
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Daniel Farivar
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Elizabeth F Shewman
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Adam B Yanke
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Jorge Chahla
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Brian J Cole
- Midwest Orthopaedics at Rush University Medical Center, Chicago, Illinois, U.S.A..
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11
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Ghouri A, Muzumdar S, Barr AJ, Robinson E, Murdoch C, Kingsbury SR, Conaghan PG. The relationship between meniscal pathologies, cartilage loss, joint replacement and pain in knee osteoarthritis: a systematic review. Osteoarthritis Cartilage 2022; 30:1287-1327. [PMID: 35963512 DOI: 10.1016/j.joca.2022.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVE We conducted a systematic review in order to understand the relationship between imaging-visualised meniscus pathologies, hyaline cartilage, joint replacement and pain in knee osteoarthritis (OA). DESIGN A search of the Medline, Excerpta Medica database (EMBASE) and Cochrane library databases was performed for original publications reporting association between imaging-detected meniscal pathology (extrusion or tear/damage) and longitudinal and cross-sectional assessments of hyaline articular cartilage loss [assessed on magnetic resonance imaging (MRI)], incident joint replacement and pain (longitudinal and cross-sectional) in knee OA. Each association was qualitatively characterised by a synthesis of data from each analysis, based upon study design and quality scoring (including risk of bias assessment and adequacy of covariate adjustment using Cochrane recommended methodology). RESULTS In total 4,878 abstracts were screened and 82 publications were included (comprising 72 longitudinal analyses and 49 cross-sectional). Using high quality, well-adjusted data, meniscal extrusion and meniscal tear/damage were associated with longitudinal progression of cartilage loss, cross-sectional cartilage loss severity and joint replacement, independently of age, sex and body mass index (BMI). Medial and lateral meniscal tears were associated with cartilage loss when they occurred in the body and posterior horns, but not the anterior horns. There was a lack of high quality, well-adjusted meniscal pathology and pain publications and no clear independent association between meniscal extrusion or tear/damage with pain severity, progression in pain or incident frequent knee symptoms. CONCLUSION Meniscal features have strong associations with cartilage loss and joint replacement in knee OA, but weak associations with knee pain. Systematic review PROSPERO registration number: CRD 42020210910.
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Affiliation(s)
- A Ghouri
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | | | - A J Barr
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | - E Robinson
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | - C Murdoch
- Calderdale and Huddersfield NHS Foundation Trust, UK.
| | - S R Kingsbury
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
| | - P G Conaghan
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and NIHR Leeds Musculoskeletal Biomedical Research Unit, Leeds, UK.
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12
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Oo WM, Linklater JM, Bennell KL, Daniel MS, Pryke D, Wang X, Yu SP, Deveza L, Duong V, Hunter DJ. Reliability and Convergent Construct Validity of Quantitative Ultrasound for Synovitis, Meniscal Extrusion, and Osteophyte in Knee Osteoarthritis With MRI. JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2022; 41:1559-1573. [PMID: 34569080 DOI: 10.1002/jum.15840] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/30/2021] [Accepted: 09/09/2021] [Indexed: 05/25/2023]
Abstract
AIMS To determine: 1) inter-rater reliability of quantitative measurements of ultrasound-detected synovitis, meniscal extrusion, and osteophytes; and 2) construct (convergent) validity via correlations and absolute agreements between ultrasound- and gold-standard magnetic resonance imaging (MRI)-outcomes in knee osteoarthritis. METHODS Dynamic ultrasound images for supra-patellar synovitis, meniscal extrusion, and osteophytes were acquired and quantified by a physician operator, musculoskeletal ultrasonographer, and medical student independently. On the same day, 3T MRI images were acquired. Effusion-synovitis, meniscal extrusion, and osteophytes were quantified on sagittal or coronal proton-density-weighted fat-suppressed noncontrast TSE sequences, respectively. Intra-class correlation coefficients (ICCs), Pearson's correlations (r), and Bland-Altman plots were used to analyze inter-rater reliability, and correlations, and agreements between the two imaging modalities. RESULTS Eighty-nine participants [48 females (53.9%)] with mean (standard deviation) age of 61.5 ± 6.9 years were included. The inter-rater reliability was excellent for osteophytes (ICC range = 0.90-0.96), meniscal extrusion (ICC range = 0.90-0.93), and synovitis (ICC range = 0.86-0.88). The correlations between ultrasound pathologies and their MRI counterparts were very strong (ICC range = 0.85-0.98) except for lateral meniscal extrusion [0.66 (95% CI, 0.52-0.76)]. Bland-Altman plots showed 0.01, 0.05, 0.10, 0.53, and 0.60 mm larger size in ultrasound medial tibial and medial femoral osteophytes, medial meniscal extrusions, synovitis, and lateral meniscal extrusions with 95% limits of agreements [±0.39, ±0.44, ±0.85, ±0.70, and ±0.90 (SDs)] than MRI measures, respectively. The lines of equality were within 95% CI of the mean differences (bias) only for medial osteophytes and medial meniscal extrusion. CONCLUSION The quantitative assessment of synovitis, meniscal extrusion, and osteophytes generally showed excellent inter-rater reliability and strong correlations with MRI-based measurements. Absolute agreement was strong for medial tibiofemoral pathologies.
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Affiliation(s)
- Win Min Oo
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
- Department of Physical Medicine and Rehabilitation, Mandalay General Hospital, University of Medicine, Mandalay, Mandalay, Myanmar
| | - James M Linklater
- Department of Musculoskeletal Imaging, Castlereagh Sports Imaging Center, St. Leonards, Sydney, NSW, Australia
| | - Kim L Bennell
- Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, School of Health Sciences, Faculty of Medicine Dentistry and Health Sciences, The University of Melbourne, Melbourne, Vic, Australia
| | - Matthew S Daniel
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
| | - Danielle Pryke
- Department of Musculoskeletal Imaging, Castlereagh Sports Imaging Center, St. Leonards, Sydney, NSW, Australia
| | - Xia Wang
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
| | - Shirley P Yu
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
| | - Leticia Deveza
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
| | - Vicky Duong
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
| | - David J Hunter
- Rheumatology Department, Royal North Shore Hospital and Institute of Bone and Joint Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia
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13
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Zhang X, Furumatsu T, Okazaki Y, Okazaki Y, Hiranaka T, Xue H, Kintaka K, Yamauchi T, Ozaki T. Medial meniscus posterior root repair reduces the extruded meniscus volume during knee flexion with favorable clinical outcome. Knee Surg Sports Traumatol Arthrosc 2021; 29:4205-4212. [PMID: 33704516 DOI: 10.1007/s00167-021-06505-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 02/12/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE The volume of medial meniscus (MM) extrusion at 10° and 90° knee flexions using three-dimensional (3D) magnetic resonance imaging (MRI) and assessed relevant clinical outcomes at 1-year follow-up were evaluated. METHODS Twenty-four patients who underwent MM posterior root repair were retrospectively reviewed. At 10° and 90° knee flexions, the meniscal extrusion distance and volume were measured using 3D meniscus models constructed by SYNAPSE VINCENT®. The correlation between Knee Injury and Osteoarthritis Outcome Score, Lysholm, International Knee Documentation Committee scores, Tegner activity, and pain visual analog scales and changes in MM extrusion were assessed. RESULTS No significant differences in the MM medial extrusion were observed between 10° and 90° knee flexions postoperatively. MM posterior extrusion (MMPE) decreased significantly at 10° and 90° knee flexions postoperatively. At 90° knee flexion, the meniscus volume at the intra-tibial surface increased at 3 and 12 months postoperatively. The MM extrusion volume increased slightly at 10° knee flexion; however, the volume decreased significantly at 90° knee flexion postoperatively. The change in MMPE significantly correlated with clinical scores. All 12-month clinical scores were significantly improved compared to preoperative scores. CONCLUSIONS The progression of meniscus posterior extrusion and reduction of its volume at 90° knee flexion can be suppressed by MM posterior root repair. Postoperative clinical scores correlated with reductions of the posterior extrusion. Regarding clinical relevance, the dynamic stability of the meniscus can be maintained by MM posterior root repair, which is an effective therapeutic method for improving its clinical status. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Ximing Zhang
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan.
| | - Yoshiki Okazaki
- Department of Orthopaedic Surgery, Chikamori Hospital, 1-1-16 Okawasuji, Kochi, 780-8522, Japan
| | - Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Haowei Xue
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Keisuke Kintaka
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
| | - Takatsugu Yamauchi
- Division of Radiology, Medical Technology Department, Okayama University Hospital, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, 2-5-1 Shikatacho, Kitaku, Okayama, 700-8558, Japan
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14
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Sonographic evaluation of lateral meniscal extrusion: implementation and validation. Arch Orthop Trauma Surg 2021; 141:271-281. [PMID: 33215303 PMCID: PMC7886729 DOI: 10.1007/s00402-020-03683-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 11/04/2020] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Meniscal extrusion (ME) is an important indicator of and prognostic factor for various knee pathologies. To date, no standardized protocol for the ultrasound-based examination of lateral ME exists. The purpose of the present study was to test the reliability and validity of lateral ME measurements using a standardized ultrasound-based examination protocol. MATERIALS AND METHODS A group consisting of 11 healthy volunteers (Group I, male and female, 18-45 years) as well as a group of 10 consecutive patients who had undergone all-inside lateral meniscal radial tear repair were included (Group II, male and female, 23-43 years). Lateral ME, the main outcome parameter, was measured by ultrasound (US; both groups) and magnetic resonance imaging (MRI; Group II only). Both knees of all subjects were examined in an unloaded state and under axial compression of the knee (50% of body weight). Repeated measurements obtained in Group I by 2 observers were used for reliability testing, and the validity of US was assessed through comparison with MRI data (Group II). RESULTS A total of 66 US images of Group I, obtained by each observer, were analyzed for reliability testing. Forty US and MR images of Group II were assessed for validation. Results showed good interrater (ICC = 0.904) and excellent intrarater (ICC = 0.942) reliability of US-based measurements of lateral ME. Agreement with MRI results was poor (ICC = 0.439), with US systematically overestimating results by 1.1 mm on average. CONCLUSIONS Ultrasound is a reliable, quick and cost-effective technique for lateral ME measurement, but results are not readily comparable with MRI. TRIAL REGISTRATION The study was registered in the European Union Clinical Trials Register (EudraCT-Number: 2017-005037-24).
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