In vivo anterior cruciate ligament length pattern assessment secondary to differences in the femoral attachment under loading condition using image-matching techniques

2019 ◽  
Vol 24 (2) ◽  
pp. 294-300 ◽  
Author(s):  
Kazunori Hino ◽  
Yoshitaka Shiraishi ◽  
Kazuho Nishimatsu ◽  
Tatsuhiko Kutsuna ◽  
Kunihiko Watamori ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Image Matching ◽  
Loading Condition ◽  
Cruciate Ligament ◽  
Ligament Length ◽  
Femoral Attachment ◽  
Anterior Cruciate ◽  
Matching Techniques

Measuring Strain Distributions in the Anterior Cruciate Ligament Using Ultrasound

2010 ◽  
Author(s):  
Amy Cochran ◽  
Yingxin Gao ◽  
Ursula Krotscheck ◽  
Margret Thompson ◽  
James Stouffer ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Treatment Strategies ◽  
Acl Injury ◽  
Physiological Factors ◽  
Detailed Understanding ◽  
Prevention And Treatment ◽  
Anterior Cruciate ◽  
Tissue Motion

Optimal prevention and treatment strategies of anterior cruciate ligament (ACL) injury can be realized with a detailed understanding of how physiological factors impact the ACL. A noninvasive, in vivo method that assesses the ACL’s mechanical integrity is needed to help clarify this multi-factorial pathophysiology. We investigated the use of the noninvasive, in vivo technique, ultrasound strain elastography (USE) (1), to distinguish between normal and injured ACLs. USE is used as a diagnostic tool in oncological (2), hepatic (3), and cardiovascular (4) applications. This technique uses ultrasonic RF data to track tissue motion in order to estimate strain within the tissue.

Lateral Extra-articular Tenodesis Contributes Little to Change In Vivo Kinematics After Anterior Cruciate Ligament Reconstruction: A Randomized Controlled Trial

2021 ◽  
pp. 036354652110032
Author(s):  
Daisuke Chiba ◽  
Tom Gale ◽  
Kyohei Nishida ◽  
Felipe Suntaxi ◽  
Bryson P. Lesniak ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
P Value ◽  
In Vivo Kinematics ◽  
Acl Deficiency ◽  
Downhill Running ◽  
Value Range ◽  
Foot Strike ◽  
Anterior Cruciate

Background: Lateral extra-articular tenodesis (LET) in combination with anterior cruciate ligament (ACL) reconstruction (ACLR) has been proposed to improve residual rotatory knee instability in patients having ACL deficiency. Purpose/Hypothesis: The purpose was to compare the effects of isolated ACLR (iACLR) versus LET in combination with ACLR (ACLR+LET) on in vivo kinematics during downhill running. It was hypothesized that ACLR+LET would reduce the internal rotation of the reconstructed knee in comparison with iACLR. Study Design: Controlled laboratory study. Methods: A total of 18 patients with ACL deficiency were included. All participants were randomly assigned to receive ACLR+ LET or iACLR during surgery. Six months and 12 months after surgery, knee joint motion during downhill running was measured using dynamic biplane radiography and a validated registration process that matched patient-specific 3-dimensional bone models to synchronized biplane radiographs. Anterior tibial translation (ATT; positive value means “anterior translation”) and tibial rotation (TR) relative to the femur were calculated for both knees. The side-to-side differences (SSDs) in kinematics were also calculated (operated knee–contralateral healthy knee). The SSD value was compared between ACLR+LET and iACLR groups using a Mann-Whitney U test. Results: At 6 months after surgery, the SSD of ATT in patients who had undergone ACLR+LET (–1.9 ± 2.0 mm) was significantly greater than that in patients who had undergone iACLR (0.9 ± 2.3 mm) at 0% of the gait cycle (foot strike) ( P = .031). There was no difference in ATT 12 months after surgery. Regarding TR, there were no differences between ACLR+LET and iACLR at either 6 months ( P value range, .161-.605) or 12 months ( P value range, .083-.279) after surgery. Conclusion: LET in combination with ACLR significantly reduced ATT at the instant of foot strike during downhill running at 6 months after surgery. However, this effect was not significant at 12 months after surgery. The addition of LET to ACLR had no effect on TR at both 6 and 12 months after surgery. Clinical Relevance: LET in combination with ACLR may stabilize sagittal knee motion during downhill running in the early postoperation phase, but according to this study, it has no effect on 12-month in vivo kinematics. Registration: NCT02913404 ( ClinicalTrials.gov identifier)

The Elongation Behavior of the Anterior Cruciate Ligament Graft in Vivo

2001 ◽  
Vol 29 (2) ◽  
pp. 161-166 ◽  
Author(s):  
Bruce D. Beynnon ◽  
Benjamin S. Uh ◽  
Robert J. Johnson ◽  
Braden C. Fleming ◽  
Per A. Renström ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Anterior Cruciate Ligament Graft ◽  
Anterior Cruciate
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