MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear
Abstract Purpose The purpose of this study was to compare the medial meniscus (MM) degeneration, meniscus extrusion, and tibial joint inclination by using MRI to consider the pathogenesis of posterior root tear (PRT) in medial‐type knee osteoarthritis (KOA) both with and without medial meniscus post...
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Wiley
2022-01-01
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| Series: | Journal of Experimental Orthopaedics |
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| Online Access: | https://doi.org/10.1186/s40634-022-00474-y |
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| author | Kosuke Hisashi Takeshi Muneta Yuji Kohno Mana Sasaki Junya Yamazaki Haruhisa Hayashi Hideyuki Koga Toshiyuki Morito |
| author_facet | Kosuke Hisashi Takeshi Muneta Yuji Kohno Mana Sasaki Junya Yamazaki Haruhisa Hayashi Hideyuki Koga Toshiyuki Morito |
| author_sort | Kosuke Hisashi |
| collection | DOAJ |
| description | Abstract Purpose The purpose of this study was to compare the medial meniscus (MM) degeneration, meniscus extrusion, and tibial joint inclination by using MRI to consider the pathogenesis of posterior root tear (PRT) in medial‐type knee osteoarthritis (KOA) both with and without medial meniscus posterior root tear (MMPRT). Methods This study used open MRI with flexion sagittal view and included 324 medial‐type osteoarthritic knees with a Kellegren–Lawrence grade of 2 or less. Following the exclusion process, 151 knees were selected for MRI analysis. MM degeneration grading was performed according to Jerosch by 5 degrees of 0–4 in four different portions from anterior to posterior. MM medial extrusion (MMME), MM posterior extrusion (MMPE), medial tibial medial slope (MTMS), and medial tibial posterior slope (MTPS) were measured according to previous studies. Results MM degeneration in the anterior portion to MCL averaged 1.72 ± 0.67 in the PRT group (n = 48) and 1.40 ± 0.78 in the non‐PRT group (n = 103). The degeneration grade was statistically higher in the PRT group than in the non‐PRT group (p = 0.050). There was no difference in MM degeneration in the other three portions. MMME averaged 4.02 ± 1.12 mm in the PRT group and 3.11 ± 1.11 mm in the non‐PRT group. MMPE averaged 4.22 ± 0.87 mm in the PRT group and 2.83 ± 1.12 mm in the non‐PRT group. Both MMME and MMPE in the PRT group were statistically larger than those in the non‐PRT group (p < 0.001). There was no difference in MTMS between the two groups. MTPS averaged 6.34 ± 2.25° in the PRT group and 5.28 ± 2.23° in the non‐PRT group. The MTPS of the PRT group was statistically larger than that of the non‐PRT group (p = 0.007). Conclusion The severity of MM degeneration, extrusion of MM, and degree of tibial slope were compared between medial‐type KOA with and without PRT using an open MRI. MM degeneration was more severe anteriorly in the PRT group. The PRT group showed larger MMME and MMPE with greater MTPS. Level of evidence III. Retrospective cohort study. |
| format | Article |
| id | doaj-art-b1865bb167294f0c99ff6708e48afb01 |
| institution | DOAJ |
| issn | 2197-1153 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
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| series | Journal of Experimental Orthopaedics |
| spelling | doaj-art-b1865bb167294f0c99ff6708e48afb012025-08-20T03:19:21ZengWileyJournal of Experimental Orthopaedics2197-11532022-01-0191n/an/a10.1186/s40634-022-00474-yMRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tearKosuke Hisashi0Takeshi Muneta1Yuji Kohno2Mana Sasaki3Junya Yamazaki4Haruhisa Hayashi5Hideyuki Koga6Toshiyuki Morito7Hachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanHachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanHachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanHachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanHachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanHachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanDepartment of Joint Surgery and Sports MedicineTokyo Medical and Dental UniversityTokyoJapanHachioji‐Higashi Orthopedic Clinic and Akishima Orthopedic ClinicJoint Surgery Institute36‐1 Takakura‐machi, Hachioji‐shi192‐0033TokyoJapanAbstract Purpose The purpose of this study was to compare the medial meniscus (MM) degeneration, meniscus extrusion, and tibial joint inclination by using MRI to consider the pathogenesis of posterior root tear (PRT) in medial‐type knee osteoarthritis (KOA) both with and without medial meniscus posterior root tear (MMPRT). Methods This study used open MRI with flexion sagittal view and included 324 medial‐type osteoarthritic knees with a Kellegren–Lawrence grade of 2 or less. Following the exclusion process, 151 knees were selected for MRI analysis. MM degeneration grading was performed according to Jerosch by 5 degrees of 0–4 in four different portions from anterior to posterior. MM medial extrusion (MMME), MM posterior extrusion (MMPE), medial tibial medial slope (MTMS), and medial tibial posterior slope (MTPS) were measured according to previous studies. Results MM degeneration in the anterior portion to MCL averaged 1.72 ± 0.67 in the PRT group (n = 48) and 1.40 ± 0.78 in the non‐PRT group (n = 103). The degeneration grade was statistically higher in the PRT group than in the non‐PRT group (p = 0.050). There was no difference in MM degeneration in the other three portions. MMME averaged 4.02 ± 1.12 mm in the PRT group and 3.11 ± 1.11 mm in the non‐PRT group. MMPE averaged 4.22 ± 0.87 mm in the PRT group and 2.83 ± 1.12 mm in the non‐PRT group. Both MMME and MMPE in the PRT group were statistically larger than those in the non‐PRT group (p < 0.001). There was no difference in MTMS between the two groups. MTPS averaged 6.34 ± 2.25° in the PRT group and 5.28 ± 2.23° in the non‐PRT group. The MTPS of the PRT group was statistically larger than that of the non‐PRT group (p = 0.007). Conclusion The severity of MM degeneration, extrusion of MM, and degree of tibial slope were compared between medial‐type KOA with and without PRT using an open MRI. MM degeneration was more severe anteriorly in the PRT group. The PRT group showed larger MMME and MMPE with greater MTPS. Level of evidence III. Retrospective cohort study.https://doi.org/10.1186/s40634-022-00474-yKnee osteoarthritisMRIMMPRTMeniscus degenerationMeniscus extrusionTibial slope |
| spellingShingle | Kosuke Hisashi Takeshi Muneta Yuji Kohno Mana Sasaki Junya Yamazaki Haruhisa Hayashi Hideyuki Koga Toshiyuki Morito MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear Journal of Experimental Orthopaedics Knee osteoarthritis MRI MMPRT Meniscus degeneration Meniscus extrusion Tibial slope |
| title | MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear |
| title_full | MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear |
| title_fullStr | MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear |
| title_full_unstemmed | MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear |
| title_short | MRI study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear |
| title_sort | mri study of medial meniscus degeneration of osteoarthritic knees with or without posterior root tear |
| topic | Knee osteoarthritis MRI MMPRT Meniscus degeneration Meniscus extrusion Tibial slope |
| url | https://doi.org/10.1186/s40634-022-00474-y |
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