Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee
Abstract Background Post-arthroscopic osteonecrosis of the knee (PAONK) is a rare condition. No studies have analyzed the relationship between the meniscus extrusion and PAONK. The purpose of this retrospective study is to test a hypothesis that the degree of the medial meniscus (MM) extrusion might...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2021-10-01
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| Series: | BMC Musculoskeletal Disorders |
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| Online Access: | https://doi.org/10.1186/s12891-021-04730-7 |
| _version_ | 1819114810363609088 |
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| author | Jun Yamaguchi Kazunori Yasuda Eiji Kondo Takuma Kaibara Daisuke Ueda Koji Yabuuchi Jun Onodera Norimasa Iwasaki Mitsuru Saito Tomonori Yagi |
| author_facet | Jun Yamaguchi Kazunori Yasuda Eiji Kondo Takuma Kaibara Daisuke Ueda Koji Yabuuchi Jun Onodera Norimasa Iwasaki Mitsuru Saito Tomonori Yagi |
| author_sort | Jun Yamaguchi |
| collection | DOAJ |
| description | Abstract Background Post-arthroscopic osteonecrosis of the knee (PAONK) is a rare condition. No studies have analyzed the relationship between the meniscus extrusion and PAONK. The purpose of this retrospective study is to test a hypothesis that the degree of the medial meniscus (MM) extrusion might be significantly greater in the knees with PAONK than in the matched control knees both before and after the meniscectomy. Methods Ten knees with PAONK were detected out of a total of 876 knees which had undergone arthroscopic partial meniscectomy of the MM. Ten matched control knees were randomly selected out of the remaining 866 knees without PAONK. The clinical data of these 20 patients were retrospectively collected from the medical records. To evaluate the location of the menisci on the joint line, Extrusion width and Inner width were defined on a coronal section of magnetic resonance imaging (MRI). The intra- and inter-rater reliability was evaluated by calculating the intra- and inter-class coefficients. Statistical comparisons between the 2 groups were made using the 3 non-parametric tests. Results Before the meniscectomy, the Extrusion width of the MM (mean 4.7 ± 1.4 mm) was significantly greater than that (3.0 ± 1.3 mm) in the Control group (P = 0.0195). In the MRI taken in a range from 3 to 50 weeks after the meniscectomy, the Extrusion width of the MM (5.9 ± 1.1 mm) in the PAONK group was significantly greater than that (3.4 ± 1.4 mm) in the Control group (P = 0.0009), and the Inner width of the MM (0.6 ± 1.7 mm) in the PAONK group was significantly less than that (3.9 ± 1.0 mm) in the Control group (P = 0.0001). Conclusion A significant relationship was found between the degree of the MM extrusion and the onset of PAONK. This study suggested that the extrusion of the MM is a potential predisposing factor for PAONK. |
| first_indexed | 2024-12-22T04:51:13Z |
| format | Article |
| id | doaj.art-28598d5be8ef422ba660ed00ac28b66f |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-22T04:51:13Z |
| publishDate | 2021-10-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-28598d5be8ef422ba660ed00ac28b66f2022-12-21T18:38:29ZengBMCBMC Musculoskeletal Disorders1471-24742021-10-0122111110.1186/s12891-021-04730-7Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the kneeJun Yamaguchi0Kazunori Yasuda1Eiji Kondo2Takuma Kaibara3Daisuke Ueda4Koji Yabuuchi5Jun Onodera6Norimasa Iwasaki7Mitsuru Saito8Tomonori Yagi9Sports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalSports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalCenter for Sports Medicine, Hokkaido University HospitalSports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalSports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalSports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalSports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalDepartment of Orthopaedic Surgery, Hokkaido University Graduate School of MedicineDepartment of Orthopaedic Surgery, The Jikei University School of MedicineSports Medicine and Arthroscopy Center, Yagi Orthopaedic HospitalAbstract Background Post-arthroscopic osteonecrosis of the knee (PAONK) is a rare condition. No studies have analyzed the relationship between the meniscus extrusion and PAONK. The purpose of this retrospective study is to test a hypothesis that the degree of the medial meniscus (MM) extrusion might be significantly greater in the knees with PAONK than in the matched control knees both before and after the meniscectomy. Methods Ten knees with PAONK were detected out of a total of 876 knees which had undergone arthroscopic partial meniscectomy of the MM. Ten matched control knees were randomly selected out of the remaining 866 knees without PAONK. The clinical data of these 20 patients were retrospectively collected from the medical records. To evaluate the location of the menisci on the joint line, Extrusion width and Inner width were defined on a coronal section of magnetic resonance imaging (MRI). The intra- and inter-rater reliability was evaluated by calculating the intra- and inter-class coefficients. Statistical comparisons between the 2 groups were made using the 3 non-parametric tests. Results Before the meniscectomy, the Extrusion width of the MM (mean 4.7 ± 1.4 mm) was significantly greater than that (3.0 ± 1.3 mm) in the Control group (P = 0.0195). In the MRI taken in a range from 3 to 50 weeks after the meniscectomy, the Extrusion width of the MM (5.9 ± 1.1 mm) in the PAONK group was significantly greater than that (3.4 ± 1.4 mm) in the Control group (P = 0.0009), and the Inner width of the MM (0.6 ± 1.7 mm) in the PAONK group was significantly less than that (3.9 ± 1.0 mm) in the Control group (P = 0.0001). Conclusion A significant relationship was found between the degree of the MM extrusion and the onset of PAONK. This study suggested that the extrusion of the MM is a potential predisposing factor for PAONK.https://doi.org/10.1186/s12891-021-04730-7Osteonecrosis of the kneeArthroscopic meniscectomyMeniscal extrusionMeniscal locationMedial meniscusPosterior root tear |
| spellingShingle | Jun Yamaguchi Kazunori Yasuda Eiji Kondo Takuma Kaibara Daisuke Ueda Koji Yabuuchi Jun Onodera Norimasa Iwasaki Mitsuru Saito Tomonori Yagi Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee BMC Musculoskeletal Disorders Osteonecrosis of the knee Arthroscopic meniscectomy Meniscal extrusion Meniscal location Medial meniscus Posterior root tear |
| title | Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee |
| title_full | Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee |
| title_fullStr | Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee |
| title_full_unstemmed | Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee |
| title_short | Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee |
| title_sort | extrusion of the medial meniscus is a potential predisposing factor for post arthroscopy osteonecrosis of the knee |
| topic | Osteonecrosis of the knee Arthroscopic meniscectomy Meniscal extrusion Meniscal location Medial meniscus Posterior root tear |
| url | https://doi.org/10.1186/s12891-021-04730-7 |
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