Abstract
Purpose: The medial meniscus is a secondary stabilizer of anterior tibial translation in anterior cruciate ligament (ACL)-deficient knees. ACL reconstruction effectively restores an increased anterior tibial translation in the ACL-deficient knee. However, knee osteoarthritis sometimes develops in ACL-reconstructed patients during a long-term follow-up period. We hypothesized that the medial meniscal position would be different between the ACL-deficient and reconstructed knees. The aim of this study was to investigate pre-operative and postoperative location of the medial meniscus in patients who underwent ACL reconstruction. Methods: ACL-reconstructed knees (28 knees) and normal knees (27 knees) were investigated. Medial tibial plateau length (MTPL) and medial tibial plateau width (MTPW) were determined using radiographic images. Magnetic resonance imaging (MRI)-based medial meniscal length (MML), medial meniscal width (MMW), and medial meniscal extrusion (MME) were measured. Postoperative change in the MML, MMW, and MME were evaluated and compared with those in normal knees. Results: No significant differences between the ACL-deficient (pre-operative) and normal groups were noted. The ACL-reconstructed (postoperative) group showed an increase in the MML, in the percentage of the MML (%MML = 100 MML/MTPL), and in the MME. Significant differences between postoperative and normal groups were observed in the MML, %MML, and MME. MMW and MMW percentage (100 MMW/MTPW) were similar in all groups. Conclusions: The anteroposterior length and radial extrusion of the medial meniscus increased after ACL reconstruction. Transposition of the medial meniscus may be a possible cause of developing further degenerative knee joint disorders after ACL reconstruction.
| Original language | English |
|---|---|
| Pages (from-to) | 2481-2487 |
| Number of pages | 7 |
| Journal | International Orthopaedics |
| Volume | 39 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 1 2015 |
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Keywords
- Anterior cruciate ligament reconstruction
- Medial meniscus
- Meniscal extrusion
- Meniscal length
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
Cite this
Postoperative change in the length and extrusion of the medial meniscus after anterior cruciate ligament reconstruction. / Narazaki, Shinji; Furumatsu, Takayuki; Tanaka, Takaaki; Fujii, Masataka; Miyazawa, Shinichi; Inoue, Hiroto; Shimamura, Yasunori; Saiga, Kenta; Ozaki, Toshihumi.
In: International Orthopaedics, Vol. 39, No. 12, 01.12.2015, p. 2481-2487.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Postoperative change in the length and extrusion of the medial meniscus after anterior cruciate ligament reconstruction
AU - Narazaki, Shinji
AU - Furumatsu, Takayuki
AU - Tanaka, Takaaki
AU - Fujii, Masataka
AU - Miyazawa, Shinichi
AU - Inoue, Hiroto
AU - Shimamura, Yasunori
AU - Saiga, Kenta
AU - Ozaki, Toshihumi
PY - 2015/12/1
Y1 - 2015/12/1
N2 - Purpose: The medial meniscus is a secondary stabilizer of anterior tibial translation in anterior cruciate ligament (ACL)-deficient knees. ACL reconstruction effectively restores an increased anterior tibial translation in the ACL-deficient knee. However, knee osteoarthritis sometimes develops in ACL-reconstructed patients during a long-term follow-up period. We hypothesized that the medial meniscal position would be different between the ACL-deficient and reconstructed knees. The aim of this study was to investigate pre-operative and postoperative location of the medial meniscus in patients who underwent ACL reconstruction. Methods: ACL-reconstructed knees (28 knees) and normal knees (27 knees) were investigated. Medial tibial plateau length (MTPL) and medial tibial plateau width (MTPW) were determined using radiographic images. Magnetic resonance imaging (MRI)-based medial meniscal length (MML), medial meniscal width (MMW), and medial meniscal extrusion (MME) were measured. Postoperative change in the MML, MMW, and MME were evaluated and compared with those in normal knees. Results: No significant differences between the ACL-deficient (pre-operative) and normal groups were noted. The ACL-reconstructed (postoperative) group showed an increase in the MML, in the percentage of the MML (%MML = 100 MML/MTPL), and in the MME. Significant differences between postoperative and normal groups were observed in the MML, %MML, and MME. MMW and MMW percentage (100 MMW/MTPW) were similar in all groups. Conclusions: The anteroposterior length and radial extrusion of the medial meniscus increased after ACL reconstruction. Transposition of the medial meniscus may be a possible cause of developing further degenerative knee joint disorders after ACL reconstruction.
AB - Purpose: The medial meniscus is a secondary stabilizer of anterior tibial translation in anterior cruciate ligament (ACL)-deficient knees. ACL reconstruction effectively restores an increased anterior tibial translation in the ACL-deficient knee. However, knee osteoarthritis sometimes develops in ACL-reconstructed patients during a long-term follow-up period. We hypothesized that the medial meniscal position would be different between the ACL-deficient and reconstructed knees. The aim of this study was to investigate pre-operative and postoperative location of the medial meniscus in patients who underwent ACL reconstruction. Methods: ACL-reconstructed knees (28 knees) and normal knees (27 knees) were investigated. Medial tibial plateau length (MTPL) and medial tibial plateau width (MTPW) were determined using radiographic images. Magnetic resonance imaging (MRI)-based medial meniscal length (MML), medial meniscal width (MMW), and medial meniscal extrusion (MME) were measured. Postoperative change in the MML, MMW, and MME were evaluated and compared with those in normal knees. Results: No significant differences between the ACL-deficient (pre-operative) and normal groups were noted. The ACL-reconstructed (postoperative) group showed an increase in the MML, in the percentage of the MML (%MML = 100 MML/MTPL), and in the MME. Significant differences between postoperative and normal groups were observed in the MML, %MML, and MME. MMW and MMW percentage (100 MMW/MTPW) were similar in all groups. Conclusions: The anteroposterior length and radial extrusion of the medial meniscus increased after ACL reconstruction. Transposition of the medial meniscus may be a possible cause of developing further degenerative knee joint disorders after ACL reconstruction.
KW - Anterior cruciate ligament reconstruction
KW - Medial meniscus
KW - Meniscal extrusion
KW - Meniscal length
UR - http://www.scopus.com/inward/record.url?scp=84947025963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84947025963&partnerID=8YFLogxK
U2 - 10.1007/s00264-015-2704-z
DO - 10.1007/s00264-015-2704-z
M3 - Article
C2 - 25693884
AN - SCOPUS:84947025963
VL - 39
SP - 2481
EP - 2487
JO - International Orthopaedics
JF - International Orthopaedics
SN - 0341-2695
IS - 12
ER -