Modeling Forces on the Anterior Cruciate Knee Ligament During Backward Falls While Skiing

Author(s):  
A Bally ◽  
M Boreiko ◽  
F Bonjour ◽  
CA Brown
1997 ◽  
Vol 68 (2) ◽  
pp. 142-148 ◽  
Author(s):  
Savio L-Y Woo ◽  
Christopher Niyibizi ◽  
John Matyas ◽  
Karl Kavalkovich ◽  
Colleen Weaver-Green ◽  
...  

2018 ◽  
Vol 46 (12) ◽  
pp. 2851-2858 ◽  
Author(s):  
Eric Hamrin Senorski ◽  
Eleonor Svantesson ◽  
Kurt P. Spindler ◽  
Eduard Alentorn-Geli ◽  
David Sundemo ◽  
...  

Background: Factors relating to the patient and anterior cruciate ligament (ACL) reconstruction may help to identify prognostic factors of long-term outcome after reconstruction. Purpose: To determine 10-year risk factors for inferior knee function after ACL reconstruction. Study Design: Cohort study; Level of evidence, 2. Methods: Prospectively collected data from the Swedish National Knee Ligament Register were extracted for patients who underwent ACL reconstruction between January 2005 and December 2006. Patients who had no data at the 10-year follow-up for the Knee injury and Osteoarthritis Outcome Score (KOOS) were excluded. Multivariable proportional odds regression modeling was used to assess 10-year patient- and surgery-related risk factors across all the KOOS subscales and the KOOS4 (mean score of 4 subscales: pain, knee-related symptoms, function in sport and recreation, and knee-related quality of life). Results: A total of 874 (41%) patients were included (male, 51.5%; median age at the time of ACL reconstruction, 27.5 years [range, 11.2-61.5 years]). An increase in the severity of concomitant articular cartilage injuries resulted in a reduced KOOS on 4 subscales (odds ratio, 0.64-0.80; P < .05). A higher preoperative KOOS pain score increased the odds of a higher score on the pain, symptoms, and sport subscales and the KOOS4. In addition, a higher preoperative body mass index was a significant risk factor for lower scores on 3 KOOS subscales and the KOOS4. No patient- or surgery-related predictor was significant across all KOOS subscales. Conclusion: This 10-year risk factor analysis identified several factors that can affect long-term knee function after ACL reconstruction. Most risk factors were related to preoperative patient-reported outcome and potentially modifiable. On the other hand, most of the surgery-related risk factors were nonmodifiable. Nevertheless, this information may be helpful to physicians and physical therapists counseling patients on their expectations of outcome after ACL reconstruction.


1997 ◽  
pp. 281-288
Author(s):  
M. Soudry ◽  
J. Aunallah ◽  
H. Solomon ◽  
J. H. Boss ◽  
I. Shijrawi ◽  
...  

Author(s):  
Hsiu-Chen Lin ◽  
Weng-Hang Lai ◽  
Chia-Ming Chang ◽  
Horng-Chaung Hsu

Female athletes are more likely to sustain an anterior cruciate ligament (ACL) injury than male athletes. Previous study has showed that female individuals had larger anterior knee laxity than their male counterparts [1]. Researchers have also reported that knee laxity and hyperextension knee were a possible factor contributing to ACL injury [2]. Loudon showed that a person with hyperextension knee, either healthy or ACL-injured, had poorer proprioceptive control. Even more, ACL-injured subjects with hyperextension knee demonstrated a declined function of proprioception feedback loop and the ability to initiate protective reflexes [3].


Author(s):  
Xavier D. Thompson ◽  
Brianna DiAntonio

An 18-year-old male hurdler reported to preparticipation physicals, with a history of anterior cruciate ligament, lateral collateral ligament, and posterior cruciate ligament sprain; medial meniscocapsular sprain; and biceps femoris tendon avulsion. The patient received full clearance from his surgeon, despite functional deficits. Rehabilitation and return-to-play decision making included analysis of patient-reported outcome scores and tests of symmetry and neuromuscular control. After graduated intervention and multiple batteries of assessments, the patient was allowed to return to full participation. The nature of this sport and the time between surgery and the intervention made thorough evaluation of function and graduated progression a necessity.


2012 ◽  
Vol 626 ◽  
pp. 896-901
Author(s):  
A.H. Alafiah ◽  
M. Normahira ◽  
M.N. Anas

Anterior Cruciate Ligament (ACL) is of the major knee ligament. A three dimensional model that reflects the geometric characteristics of the human ACL developed to explore and analyze finite element parameters such as contact pressure and stress distribution on ACL in response to complex loading conditions. Moreover, various cases studied such as cases involving and uninvolving ligament in order to obtain and analyze the stress and contact pressure relationship between ACL, meniscus and cartilage. It is known that the contact and friction caused by the ACL wrapping around the bone during knee motion played the role of transferring the force from the ACL to the bone, and had a direct effect on the stress distribution of the ACL. Thus, the project lead to better understand the mechanism of injury, to improve the design of ACL reconstruction using suitable material and optimizing rehabilitation protocols by investigation of contact pressure with and without ACL.


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