scholarly journals Diagnosis and Exercise Rehabilitation of Knee Joint Anterior Cruciate Ligament Injury Based on 3D-CT Reconstruction

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Shunchao Zhang ◽  
Zhihan Lv
Keyword(s):  
Knee Joint ◽  
3D Reconstruction ◽  
Bone Tissue ◽  
Cruciate Ligament ◽  
Ligament Injury ◽  
Reconstruction Method ◽  
3D Ct ◽  
Ct Reconstruction ◽  
Double Beam ◽  
Bone Layer

The joint capsule of the knee joint is attached to the edges of various articular surfaces and is thin and loose. Therefore, ligament reinforcement is needed to protect the knee joint and increase the stability of the joint. It plays a vital role in human activities. In this paper, a 3D-CT three-dimensional reconstruction method is used to reconstruct the ACL natural femoral imprint and double-bone tract. The relative positional relationship between the two center points is compared, and the law is summarized to guide the improvement of ACL anatomic double-beam reconstruction under arthroscopy. The 3D reconstruction results suggest that the bone layer in the anterior medial portion is the thickest, forming a peak, and the thickness of the bone layer in the posterior medial portion gradually decreases in a stepwise manner. The entire bone tissue in the anterior medial portion and posterior medial portion is integrated into one body. The tissues are connected as a whole, and the thickness is relatively uniform. The two parts of the bone tissues are not connected. The CF tissue was inserted into the bone tissue in a zigzag pattern. The changes of CF tissues in the anterior medial and posteromedial CF tissues were similar, and they were distributed stepwise from the inside to the outside. According to the bone and CF spatial structure and changing rules, ACL is divided into medial and lateral beams. According to this study, it can be summarized that (1) 3D reconstruction can clearly reconstruct the natural footprint of ACL femoral stops and postoperative osseous position and (2) 3D reconstruction can be used to evaluate the position of osseous postoperative ACL anatomic double-beam reconstruction. Arthroscopy double-beam reconstruction of ACL is instructive.

scholarly journals Automated 3D MRI Allows for Accurate Evaluation of Glenoid Bone Loss as Compared to 3D CT

2018 ◽  
Vol 6 (7_suppl4) ◽  
pp. 2325967118S0008
Author(s):  
Drew A. Lansdown ◽  
Robert Dawe ◽  
Gregory L. Cvetanovich ◽  
Nikhil N. Verma ◽  
Brian J. Cole ◽  
...  
Keyword(s):  
Bone Loss ◽  
3D Reconstruction ◽  
Ct Scan ◽  
Glenoid Bone Loss ◽  
Ct Scans ◽  
Reconstruction Method ◽  
Slice Thickness ◽  
3D Ct ◽  
Ct Reconstruction ◽  
3D Mri

Objectives: Glenoid bone loss is frequently present in the setting of recurrent shoulder instability. The magnitude of bone loss is an important determinant of the optimal surgical treatment. The current gold-standard for measurement of glenoid bone loss is three-dimensional (3D) reconstruction of a computed tomography (CT) scan. CT scans, however, carry an inherent risk of radiation and increased cost for a second modality. Magnetic resonance imaging (MRI) offers excellent soft tissue contrast and may allow resolution of bony structures to generate 3D reconstructions without a risk of ionizing radiation. We hypothesized that automated 3D MRI reconstruction would offer similar measurements of glenoid bone loss as recorded from a 3D CT scan in a clinical setting. Methods: A retrospective review was performed for fourteen patients who had both pre-operative MRI scan and CT scan of the shoulder. All MR scans were performed on a 1.5 T scanner (Siemens) utilizing a Dixon chemical shift separation sequence and the out-of-phase images with 0.90 mm slice thickness. Reconstructions of the glenoid were performed from axial images (Figure 1A) using an open-platform image processing system (3D Slicer; slicer.org). A single point on the glenoid was selected and a standard threshold was used to build a 3D model (Figure 1B). High-resolution CT scans underwent 3D reconstruction in Slicer based on Houndsfield Unit thresholding. Glenoid bone loss on both scans was measured with the Pico method by defining a circle of best fit using the inferior 2/3 of the glenoid and determining the percent area missing from this circle. Pearson’s correlation coefficient was utilized to determine the similarity between MR and CT based measurements. Statistical significance was defined as p<0.05. Results: The correlation between 3D MR and CT-based measurements of glenoid bone loss was excellent (r = 0.95, p<0.0001). The mean bone loss as measured by the 3D MR was 13.2 +- 7.2% and was 12.5 +- 8.6% for the 3D CT reconstruction (p=0.32). Bone loss in this cohort ranged from 3.7-25.4% on 3D MR and 1.4-26.0% on 3D CT. The root-mean-square difference between measurements was 2.7%. Conclusion: There was excellent agreement between automated 3D MR and 3D CT measurements of glenoid bone loss and minimal differences between these measurements. This reconstruction method requires minimal post-processing, no manual segmentation, and is obtained with widely-available MR sequences. This method has the potential to decrease the utilization for CT scans in determining glenoid bone loss. [Figure: see text]

Application of CT Three-Dimensional Image in the Diagnostic Evaluation and Treatment of Sports Knee Ligament Strain

2021 ◽  
Vol 11 (1) ◽  
pp. 276-281
Author(s):  
Xu Du
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
3D Reconstruction ◽  
Anterior Cruciate Ligament Injury ◽  
Cruciate Ligament ◽  
Three Dimensional ◽  
Measurement Data ◽  
Ligament Injury ◽  
Dimensional Reconstruction ◽  
Anterior Cruciate

Objective: This paper explores the value of CT three-dimensional reconstruction image technology in the diagnosis and treatment of anterior cruciate ligament injury of the knee joint. Methods: The paper selected March 2017–April 2018 to treat and diagnose the reconstructed images in our hospital and imported them into MIMICSl0.01 for 3D reconstruction of the knee joint, and segmented and isolated the anterior cruciate ligament model. The lengths of the anterior and posterior outer edges of the anterior cruciate ligament separated at 0° and 90° were measured respectively: the angles between the anterior and posterior cruciate ligament at 90° to the horizontal plane. Comparison and analysis of CT 3D reconstruction measurement data with recognized autopsy data and arthroscopy measurement data. Results: The positive rate of "anterior cruciate ligament injury" diagnosed by three-dimensional CT was 93.33%. The CT 3D reconstruction measurement data is not significantly different from the accepted anterior cruciate ligament cadaver measurement data. There is no statistically significant difference between the CT 3D measurement data and arthroscopic measurement data. Conclusion: Three-dimensional CT reconstruction plays a significant role in the early diagnosis of anterior cruciate ligament injury of the knee joint. CT three-dimensional reconstruction can be used as an anatomical method in the study of normal human anatomy. CT three-dimensional reconstruction of the anterior cruciate ligament of the knee joint plays an important role in guiding anterior cruciate ligament reconstruction under knee arthroscopy.

Knee Joint Response to Compressive Loading and Ligament Injury

1999 ◽  
Author(s):  
Jordan Lee ◽  
Frank Fronczak
Keyword(s):  
Knee Joint ◽  
Cruciate Ligament ◽  
Compressive Loading ◽  
Degree Of Freedom ◽  
Ligament Injury ◽  
Ligament Injuries ◽  
Acl Injuries ◽  
Measuring Machine ◽  
Anterior Cruciate ◽  
Six Degree Of Freedom

Abstract The knee joint is a six degree-of-freedom joint which has a complex response to loading. The joint has a characteristic behavior for particular ligament injuries such as anterior cruciate ligament failure. The response of the joint to a combination of compressive loading and secondary loadings was examined in this study. The secondary loadings were: an anterior force, a valgus moment, an internal torque, or an external torque. A goat model was used with 17 specimens testing different ligament injuries in vitro, specifically stretched or severed anterior cruciate ligaments (ACL) and lateral collateral ligaments (LCL). The femur was held fixed and the tibia loaded in a specially designed apparatus, allowing complete six degree-of-freedom joint motion. The motion of the tibia with respect to the femur was recorded using a coordinate measuring machine. The knee joint demonstrated sensitivity to ACL injuries but not to LCL injuries for the loadings examined. The response to ACL injuries was more highly dependant on the compressive load than the secondary loadings for all tests.

The Clinical Application and Evaluation of Artificial Cruciate Ligament Materials for Knee Exercise Injury

2014 ◽  
Vol 1022 ◽  
pp. 64-67
Author(s):  
Zhuo Wang ◽  
Yun Peng Han
Keyword(s):  
Knee Joint ◽  
Patellar Tendon ◽  
Cruciate Ligament ◽  
Tendon Graft ◽  
Ligament Injury ◽  
Artificial Ligament ◽  
Joint Activities ◽  
Tendon Transplant ◽  
Semitendinosus Graft ◽  
Bone Patellar Tendon

Rupture of knee joint cruciate ligament in sports training and competition, need through the surgical method to reconstruction of ligament reconstruction function. Application of biological materials for cruciate ligament, can make patients get less disease waste, and allows the patient knee joint activities immediately after treatment, is beneficial to the rehabilitation of patients. Cruciate ligament graft materials including autograft, allograft ligament ligament and artificial ligament. Autologous tissue reconstruction of knee joint cruciate ligament with bone patellar tendon bone and semitendinosus graft, many complications of bone patellar tendon bone graft, semitendinosus and gracilis tendon transplant will affect the joint function. Allogenic ligament materials mainly include bone patellar tendon bone and four femoral head allograft tendon bone, shortage of material is not completely kill bacteria and viruses. Artificial ligament material divided into permanent ligament, ligament and ligament scaffold material framework material, the effect of LARS artificial ligament transplantation in the treatment of cruciate ligament injury is more ideal, compared with the efficacy of autologous tendon graft, the differences were significant, had no significant differences compared with the long term effect of transplantation of autologous ligament.

Clinically Assessed Knee Joint Laxity as a Predictor for Reconstruction after an Anterior Cruciate Ligament Injury

2008 ◽  
Vol 36 (8) ◽  
pp. 1528-1533 ◽  
Author(s):  
Ioannis Kostogiannis ◽  
Eva Ageberg ◽  
Paul Neuman ◽  
Leif E. Dahlberg ◽  
Thomas Fridén ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Anterior Cruciate Ligament Injury ◽  
Cruciate Ligament ◽  
Joint Laxity ◽  
Ligament Injury ◽  
Knee Joint Laxity ◽  
Anterior Cruciate
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