scholarly journals The underlying mechanism of partial anterior cruciate ligament injuries to the meniscus degeneration of knee joint in rabbit models

2020 ◽  
Author(s):  
Dalin Wang ◽  
Zhe Wang ◽  
Mingcheng Li ◽  
Songbao Xu
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Underlying Mechanism ◽  
Joint Fluid ◽  
Control Group ◽  
Rabbit Knee ◽  
Meniscus Degeneration ◽  
Anterior Cruciate ◽  
Experimental Group

Abstract Background: The diagnosis, treatment and efficacy evaluation of anterior cruciate ligament (ACL) partial rupture remains controversial. This research aims to investigate the underlying mechanism of partial ACL injuries to the meniscus degeneration in the rabbit knee. Methods: Sixty New Zealand, white rabbits were randomly divided into three groups including an experimental group, a sham group (n=6) and and a blank control group (n=6). The experimental group is composed of an anteromedial bundle (AMB) rupture group (n=24), a posterolateral bundle (PLB) rupture group (n=24). Rabbits in the experimental group were subjected to right hind limbs knee surgery to induce ACL part injury under the arthroscopy. Finally, eight rabbits including 6 in the model group and 2 in the control group were sampled randomly on the second, fourth and eighth weeks respectively. We observed the typical form of the meniscus through HE staining. Expressions of inflammatory factors including interleukin-1β (IL-1β) and IL-17 in the knee joint fluid were determined by means of an ELISA. Analysis of the mRNA expressions of matrix metalloproteinases-13(MMP-13) was performed to evaluate the inflammatory mediators in the pathogenesis of the meniscus. Results: HE staining results showed that the surface was rough and the tissues were loose displaying collagen fibers of varying thickness. Both IL-1β and IL-17 in the synovial fluid, and the positive rate of MMP-13 in addition to MMP-13 mRNA showed a demonstrable increase treads from the 2nd to the 8th week. The significant difference was found (P<0.05) compared to the control group. Conclusion: We conclude that the elevated levels of IL-1β and IL-17, along with increased MMP13 expression, resulted in meniscus degradation in the rabbit knee joint model with partial ACL injury.

scholarly journals The underlying mechanism of partial anterior cruciate ligament injuries to the meniscus degeneration of knee joint in rabbit models

2020 ◽  
Author(s):  
Dalin Wang ◽  
Zhe Wang ◽  
Mingcheng Li ◽  
Songbao Xu
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Underlying Mechanism ◽  
Joint Fluid ◽  
Control Group ◽  
Rabbit Knee ◽  
Meniscus Degeneration ◽  
Anterior Cruciate ◽  
Experimental Group

Abstract Background: The diagnosis, treatment and efficacy evaluation of anterior cruciate ligament (ACL) partial rupture remains controversial. This research aims to investigate the underlying mechanism of partial ACL injuries to the meniscus degeneration in the rabbit knee.Methods: Sixty New Zealand, white rabbits were randomly divided into three groups including an experimental group, a sham group (n=6) and and a blank control group (n=6). The experimental group is composed of an anteromedial bundle (AMB) rupture group (n=24), a posterolateral bundle (PLB) rupture group (n=24). Rabbits in the experimental group were subjected to right hind limbs knee surgery to induce ACL part injury under the arthroscopy. Finally, eight rabbits including 6 in the model group and 2 in the control group were sampled randomly on the second, fourth and eighth weeks respectively. We observed the typical form of the meniscus through HE staining. Expressions of inflammatory factors including interleukin-1β (IL-1β) and IL-17 in the knee joint fluid were determined by means of an ELISA. Analysis of the mRNA expressions of matrix metalloproteinases-13(MMP-13) was performed to evaluate the inflammatory mediators in the pathogenesis of the meniscus.Results: HE staining results showed that the surface was rough and the tissues were loose displaying collagen fibers of varying thickness. Both IL-1β and IL-17 in the synovial fluid, and the positive rate of MMP-13 in addition to MMP-13 mRNA showed a demonstrable increase treads from the 2nd to the 8th week. The significant difference was found (P<0.05) compared to the control group.Conclusion: We conclude that the elevated levels of IL-1β and IL-17, along with increased MMP13 expression, resulted in meniscus degradation in the rabbit knee joint model with partial ACL injury.

scholarly journals The underlying mechanism of partial anterior cruciate ligament injuries to the meniscus degeneration of knee joint in rabbit models

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Dalin Wang ◽  
Zhe Wang ◽  
Mingcheng Li ◽  
Songbao Xu
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Underlying Mechanism ◽  
Joint Fluid ◽  
Control Group ◽  
Rabbit Knee ◽  
Meniscus Degeneration ◽  
Anterior Cruciate ◽  
Experimental Group

Abstract Background The diagnosis, treatment, and efficacy evaluation of anterior cruciate ligament (ACL) partial rupture remains controversial. This research aims to investigate the underlying mechanism of partial ACL injuries to the meniscus degeneration in the rabbit knee. Methods Sixty New Zealand white rabbits were randomly divided into three groups including an experimental group, a sham group (n = 6), and a blank control group (n = 6). The experimental group is composed of an anteromedial bundle (AMB) rupture group (n = 24) and a posterolateral bundle (PLB) rupture group (n = 24). Rabbits in the experimental group were subjected to right hind limbs knee surgery to induce ACL part injury under the arthroscopy. Finally, eight rabbits including 6 in the model group and 2 in the control group were sampled randomly on the 2nd, 4th, and 8th weeks respectively. We observed the typical form of the meniscus through HE staining. Expressions of inflammatory factors including interleukin-1β (IL-1β) and IL-17 in the knee joint fluid were determined by means of an ELISA. Analysis of the mRNA expressions of matrix metalloproteinases-13(MMP-13) was performed to evaluate the inflammatory mediators in the pathogenesis of the meniscus. Results HE staining results showed that the surface was rough and the tissues were loose displaying collagen fibers of varying thickness. Both IL-1β and IL-17 in the synovial fluid and the positive rate of MMP-13 in addition to MMP-13 mRNA showed a demonstrable increase treads from the 2nd to the 8th week. The significant difference was found (P < 0.05) compared to the control group. Conclusion We conclude that the elevated levels of IL-1β and IL-17, along with increased MMP13 expression, resulted in meniscus degradation in the rabbit knee joint model with partial ACL injury.

scholarly journals The underlying mechanism of partial anterior cruciate ligament injuries to the meniscus of knee joint in rabbit models

2020 ◽  
Author(s):  
Dalin Wang ◽  
Zhe Wang ◽  
Mingcheng Li ◽  
Songbao Xu
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Acl Injury ◽  
Underlying Mechanism ◽  
Joint Fluid ◽  
Control Group ◽  
Rabbit Knee ◽  
Significant Difference ◽  
Anterior Cruciate

Abstract Background The diagnosis, treatment and efficacy evaluation of anterior cruciate ligament (ACL) remains controversial. This research aims to investigate the underlying mechanism of partial ACL injuries to the meniscus degeneration in rabbit knee. Methods Sixty New Zealand, white rabbits were randomly divided into three groups: the anteromedial bundle (AMB) splitting, the posterolateral bundle (PLB) splitting and a control group. Finally, eight rabbits were sampled randomly on the second, fourth and eighth weeks respectively. We observed the typical form of the meniscus through HE staining. Expressions of inflammatory factors including interleukin-1β (IL-1β) and IL-17 in the knee joint fluid were determined by means of an ELISA. Analysis of the mRNA expressions of MMP-13 was performed to evaluate the inflammatory mediators in the pathogenesis of the meniscus. Results HE staining results showed that the surface was rough and the tissues were loose displaying collagen fibers of varying thickness. Both IL-1β and IL-17 in the synovial fluid, and the positive rate of MMP-13 in addition to MMP-13 mRNA showed a demonstrable increase treads from the 2nd to the 8th week. The significant difference was found ( P <0.05) compared to the control group. Conclusion Our findings illustrated that the elevated levels of IL-1β and IL-17, along with increased MMP13 expression, resulting in meniscus degradation in the rabbit knee joint model with partial ACL injury. When the partial ACL injury on the different bundles occurred, the reconstruction of the reserved AMB or PLB must be operated on time due to uncertainty of conservative treatment.

Effects of Sports Injury Prevention Training on the Biomechanical Risk Factors of Anterior Cruciate Ligament Injury in High School Female Basketball Players

2009 ◽  
Vol 37 (9) ◽  
pp. 1728-1734 ◽  
Author(s):  
Bee-Oh Lim ◽  
Yong Seuk Lee ◽  
Jin Goo Kim ◽  
Keun Ok An ◽  
Jin Yoo ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Injury Prevention ◽  
Cruciate Ligament ◽  
Sports Injury ◽  
Ligament Injury ◽  
Control Group ◽  
Basketball Players ◽  
Prevention Training ◽  
Anterior Cruciate ◽  
Experimental Group

Background Female athletes have a higher risk of anterior cruciate ligament injury than their male counterparts who play at similar levels in sports involving pivoting and landing. Hypothesis The competitive female basketball players who participated in a sports injury prevention training program would show better muscle strength and flexibility and improved biomechanical properties associated with anterior cruciate ligament injury than during the pretraining period and than posttraining parameters in a control group. Study Design Controlled laboratory study. Methods A total of 22 high school female basketball players were recruited and randomly divided into 2 groups (the experimental group and the control group, 11 participants each). The experimental group was instructed in the 6 parts of the sports injury prevention training program and performed it during the first 20 minutes of team practice for the next 8 weeks, while the control group performed their regular training program. Both groups were tested with a rebound-jump task before and after the 8-week period. A total of 21 reflective markers were placed in preassigned positions. In this controlled laboratory study, a 2-way analysis of variance (2 × 2) experimental design was used for the statistical analysis (P < .05) using the experimental group and a testing session as within and between factors, respectively. Post hoc tests with Sidak correction were used when significant factor effects and/or interactions were observed. Results A comparison of the experimental group's pretraining and posttraining results identified training effects on all strength parameters (P = .004 to .043) and on knee flexion, which reflects increased flexibility (P = .022). The experimental group showed higher knee flexion angles (P = .024), greater interknee distances (P = .004), lower hamstring-quadriceps ratios (P = .023), and lower maximum knee extension torques (P = .043) after training. In the control group, no statistical differences were observed between pretraining and posttraining findings (P = .084 to .873). At pretraining, no significant differences were observed between the 2 groups for any parameter (P = .067 to .784). However, a comparison of the 2 groups after training revealed that the experimental group had significantly higher knee flexion angles (P = .023), greater knee distances (P = .005), lower hamstring-quadriceps ratios (P = .021), lower maximum knee extension torques (P = .124), and higher maximum knee abduction torques (P = .043) than the control group. Conclusion The sports injury prevention training program improved the strength and flexibility of the competitive female basketball players tested and biomechanical properties associated with anterior cruciate ligament injury as compared with pretraining parameters and with posttraining parameters in the control group. Clinical Relevance This injury prevention program could potentially modify the flexibility, strength, and biomechanical properties associated with ACL injury and lower the athlete's risk for injury.

scholarly journals A complex approach in rehabilitation of the patients after the anterior cruciate ligament reconstruction

2019 ◽  
Vol 5 (3) ◽  
pp. 37
Author(s):  
I.Ya Hrubar ◽  
Yu.O. Hrubar ◽  
N.M. Grabyk
Keyword(s):  
Anterior Cruciate Ligament ◽  
Anterior Cruciate Ligament Reconstruction ◽  
Postoperative Period ◽  
Ligament Reconstruction ◽  
Clinical Course ◽  
Cruciate Ligament ◽  
Control Group ◽  
Cruciate Ligament Reconstruction ◽  
Anterior Cruciate ◽  
Experimental Group

<p><strong>The Purpose</strong> was to improve the treatment outcomes of patients who undergo ACL reconstruction under arthroscopic control through a comprehensive approach to their rehabilitation program.<strong> </strong></p><p><strong>Materials and methods. </strong>We have implemented a system of comprehensive rehabilitation of patients after the ACL reconstruction under arthroscopic control, which relied on the phase of the clinical course of the postoperative period.</p><p><strong>Results. </strong>The study involved 40 patients who underwent anterior cruciate ligament reconstruction under arthroscopic control. Experimental group (20 people) who applied a comprehensive approach in rehabilitation after ACL reconstruction, taking into account the phase of the clinical course of the postoperative period. The second group was the control group (20 patients) in which rehabilitation was carried out under the existing program. The use of cryotherapy with adjustable pulse compression in patients of the experimental group from the first day allowed to reduce twice the use of non-narcotic analgesics. Analyzing the dynamics of flexion in the knee joint, it was found that patients of the experimental group on the 25th day performed flexion by 88.46% of the appropriate maximum. Whereas in the control group just - 69.23%. Positive dynamics were noted in the indicators of myotonometry of the quadriceps muscle and measurement of the perimeter of the knee joint.</p><strong>Conclusions.</strong> The program of physical rehabilitation of patients after the anterior cruciate ligament reconstruction under arthroscopic control, which was built taking into account the phase of the clinical course of the postoperative period, has been developed and offered positive results in clinical practice. The effectiveness of the program was shown by the improvement of such indicators as: decrease in intensity of pain syndrome in the early postoperative period, increase in the range of motion in the knee joint, faster restoration of the tone of the quadriceps muscle of the thighs of patients of the experimental group as opposed to the control group

scholarly journals REHABILITATION OF NEUROMUSCULAR FUNCTION BY PHYSICAL EXERCISE

2021 ◽  
Vol 27 (3) ◽  
pp. 291-294
Author(s):  
Qiang Li
Keyword(s):  
Knee Joint ◽  
Acl Reconstruction ◽  
Cruciate Ligament ◽  
Control Group ◽  
Nerve Function ◽  
Level Of Evidence ◽  
Nerve Recovery ◽  
Anterior Cruciate ◽  
The Stability ◽  
Experimental Group

ABSTRACT Introduction In long-term sports, especially in explosive sports such as accelerated starting, athletes are prone to rupture the anterior cruciate ligament (ACL). It is the ultimate goal of ACL reconstruction for athletes to restore the stability (static and dynamic) and mechanical structure of the knee joint through reconstruction surgery. Object This article uses ACL reconstruction to repair patients’ ACL and explores the effect of athletes’ nerve recovery after sports. Methods We collected 35 ACL reconstruction athletes and randomly divided them into two groups (experimental group, 18; control group, 17). After reconstruction, the athletes in the experimental group were treated with sports rehabilitation. Results The experimental and control groups had great differences in knee joint exercise indexes and nerve function recovery. Conclusion Sports rehabilitation training can effectively improve the nerve function of the knee joint after ACL reconstruction. Level of evidence II; Therapeutic studies - investigation of treatment results.

scholarly journals SPORTS MECHANICS REHABILITATION EFFECTS ON KNEE AND MUSCLE

2021 ◽  
Vol 27 (8) ◽  
pp. 807-809
Author(s):  
Aona Chen ◽  
Shuhua Qu ◽  
Xuejun Ma ◽  
Wenjiang Zhao ◽  
Chenggen Guo
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Human Body ◽  
Cruciate Ligament ◽  
Weight Ratio ◽  
Peak Torque ◽  
Ligament Injury ◽  
Control Group ◽  
Level Of Evidence ◽  
Anterior Cruciate

ABSTRACT Introduction: The knee joint is a complex and important joint in the human body. It plays an active role in maintaining posture balance of the human body in sports, allowing one to bear a larger load and complete various complex technical movements. Objective: To investigate the stability and influence of kinemechanics in knee joint rehabilitation training. Methods: A total of 80 patients with anterior cruciate ligament injury who received treatment in Henan Provincial People's Hospital were selected and divided into control group and observation group according to the random number table method, with 40 cases in each group. Results: Six months after surgery, the peak torque (PT), peak torque to body weight ratio (PT/BWT), total work (TWT), Lysholm score and Tegner score, and knee circumference of the two groups were significantly improved compared with those before surgery (P <0.01). The degree of improvement was greater in the observation group:compared with the control group, the difference was highly statistically significant (P<0.01). Conclusions: Professional exercise rehabilitation has a definite effect on patients after anterior cruciate ligament reconstruction. It can significantly improve the muscle strength of quadriceps and hamstring, improve the function of knee joint and promote its recovery. Level of evidence II; Therapeutic studies - investigation of treatment results.

scholarly journals Femur-tibia Angle and Patella-tibia Angle: New Indicators for Diagnosing Anterior Cruciate Ligament Tears in Magnetic Resonance Imaging

2021 ◽  
Author(s):  
Zeng Li ◽  
Mengyuan Li ◽  
Yan Du ◽  
Hai Jiang ◽  
Yuanchen Ma ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Area Under The Curve ◽  
Roc Curves ◽  
Youden Index ◽  
Control Group ◽  
Acl Tear ◽  
Anterior Cruciate ◽  
Arthroscopic Knee

Abstract Background: Torn anterior cruciate ligament (ACL) contributes to internal rotation of tibia. However, there is no indicator in MRI to reflect the rotation of knee joint. So the purpose of this study is to introduce two new measurements in MRI, femur-tibia angle (FTA) and patella-tibia angle (PTA), which reflect the rotation of knee joint and assess their role in diagnosing ACL tears.Methods: Present study retrospectively reviewed the cases of primary arthroscopic knee surgery from January 2018 to December 2019 from the Arthroscopy Database at Guangdong Provincial People's Hospital. Firstly, comparisons of different measurements were conducted between the ACL tears group and isolated meniscus injury group. Then, the measurements were tested in diagnosing complete or partial ACL tears. Diagnostic performance of different measurements was assessed by area under the curve (AUC) of receiver operating characteristic (ROC) curve and cutoff values were determined by Youden index. Results: FTA and PTA in ACL tears group had 4.79 and 7.36 degrees more than that of control group (p = 0.022 and < 0.001, respectively). Besides, ACL angle and distance of anterior tibial subluxation (D) also showed significant differences (p<0.05). In distinguishing complete ACL tear with intact ACL, the ROC curves indicated that ACL angle had the highest AUC of 0.906 (95% CI: 0.833-0.978) while AUC of PTA was 0.849 (95% CI: 0.763-0.936) and AUC of FTA was 0.809 (95% CI: 0.710-0.908). In distinguishing partial ACL tear with intact ACL, the ROC curves showed that FTA and PTA had the highest AUCs of 0.847 and 0.813 with 95% CI of 0.737-0.957 and 0.680-0.947, respectively. In contrast, the AUCs of ACL angle and D were only 0.519 and 0.387 with 95% CI of 0.292-0.745 and 0.227-0.546.Conclusion: Present study introduced two new quantitative parameters, FTA and PTA, to assess the rotation of knee joint. FTA and PTA increased when ACL tears and they might be valuable in diagnosing ACL tears, especially in distinguishing partial ACL tear with intact ACL which was poorly diagnosed in MRI.

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