Diagnosis of an ACL disruption with KT-1000 arthrometer measurements

Rangger, C.; Daniel, Dale M.; Stone, Mary Lou; Kaufman, Kenton R.

doi:10.1007/bf01552161

Cited by 112 publications

(72 citation statements)

References 49 publications

(56 reference statements)

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“…They determined that there is no difference between two groups on their "one leg" balance test (45). A certain tendency to better balance in the nonpreferred leg was observed, some authors did not demonstrated differences between dominant and nondominant extremities in athletes (2,16,31). It is stated that none of the tests performed revealed statistically significant differences in balance ability between the preferred and the nonpreferred leg (22).…”

Section: Discussionmentioning

confidence: 99%

Comparision of dynamic and static balance in adolescents handball and soccer players

Karadenizli¹,

ERKUT²,

RAMAZANOGLU³

et al. 2014

TJSE

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This study aims to compare the static and dynamic balance in adolescents' handball and soccer players. 32 male student national athletes: soccer (N= 17), handball (N= 15) between 15-18 years of age and at least 3 training years were included to the study. Assessment of static and dynamic balance was measured with Prokin 5.0 Technobody. There were no significant differences found between handball and soccer players on static and dynamic balance tests. We think that there are similar movements used often by both group, like faking and changing direction. On the other hand, there was found significant difference between right and left leg of soccer players perimeter scores for unipedal (Forward-Backward) dynamic balance slalom tests, when were compared within each group { t (15)= -3,158, p < 0,01 }. Unipedal (F-B) dynamic balance slalom tests score of right leg was better than left leg for soccer players, but, there were no significant differences for handball players (p>0,05). All of the soccer players are dominantly using their right leg. In addition, this result might relate training methods and years, experience, muscle force asmmetry. On the other hand, handball players's dominant legs are also right, but their usually jumping legs are left.

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Section: Discussionmentioning

confidence: 99%

Comparision of dynamic and static balance in adolescents handball and soccer players

Karadenizli¹,

ERKUT²,

RAMAZANOGLU³

et al. 2014

TJSE

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show abstract

“…Nevertheless, the limits of the initial tension provided a match in anterior laxity to within 1 mm of that of the intact knee throughout the range of stiffness encompassing commercially available fixation methods (Table 1). A I-mm match is within the 2-3 mm difference in anterior laxity between left and right pairs of intact knees [11,32].…”

Section: Methodological Issuesmentioning

confidence: 99%

How the fixation method stiffness and initial tension affect anterior load?displacement of the knee and tension in anterior cruciate ligament grafts: a study in cadaveric knees using a double-loop hamstrings graft

EAGAR

2004

Journal of Orthopaedic Research

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There were two objectives to this study. The first was to investigate the relationship of graft fixation stiffness and graft initial tension on the anterior load-displacement behavior of knees reconstructed with a double-loop hamstrings tendon graft. The second was to determine the corresponding graft tensions at 225 N of anterior force applied to the knee. To satisfy these objectives, the anterior-load displacement curves were measured for seven cadaveric knees with the ACL intact a t flexion angles ranging from 0" to 90". The ACL was reconstructed in the same knees using a double-loop hamstrings graft. A/P load-displacement curves of the knee and graft tension were measured as the fixation method stiffness and the initial tension applied at full extension were varied (25-326 N/mm and 25-300 N). The 0 N posterior limit (unloaded position of tibia) and the anterior laxity (difference between the 0 N posterior limit and 225 N anterior limit) were computed to characterize the A/P load-displacement of the intact and reconstructed knees. The key results were that the 0 N posterior limit of the tibia was insensitive to changes in stiffness (p > 0.6503) but that increasing initial tension caused increasing posterior subluxation of the tibia with respect to the femur (p = 0.0001). The tibia was subluxed posteriorly by 5-6 mm on average at high levels of initial tension. Both initial tension and stiffness significantly affected the anterior laxity (p = 0.0001 for both factors). Anterior laxity was restored closely to normal (i.e. < I mm difference) by relatively high initial tension of 200 N in combination with low stiffness of 25 N/mm and by low initial tension of 25 N in combination with higher stiffness ranging between 94 and 326 Nlmm. When anterior laxity is restored to normal using a high initial tension-low stiffness combination however, the tibia undergoes a large posterior subluxation with respect to the femur in the unloaded state (approximately 5 mm) and a relatively high graft tension of 275 N is developed at 225 N of anterior force. Both the tibial subluxation and graft tension are reduced substantially with low initial tension-higher stiffness combinations because the amount of initial tension required to restore anterior laxity to normal is reduced by about 200 N.

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“…seven males and three females, 26.3k 12 years) based on a screening examination [8]. A positive Lachman test, > 3 mm side-to-side difference measured with KT 1000 arthrometer (Medmetric, San Diego, CA) [21], and magnetic resonance imaging confirmed ACL rupture. In addition, 10 individuals (six males and four females, 23 k6.5 years) without any significant injuries to either lower extremity were tested as a comparison group.…”

Section: Subjectsmentioning

confidence: 99%

Evidence for differential control of tibial position in perturbed unilateral stance after acute ACL rupture

Chmielewski¹,

Ramsey²,

Snyder‐Mackler³

2005

Journal Orthopaedic Research

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Functional outcomes in anterior cruciate ligament-deficient "potential copers" and "non-copers" may be related to their knee stabilization strategies. Therefore, the purpose of this study was to differentiate dynamic knee stabilization strategies of potential copers and non-copers through analysis of sagittal plane knee angle and tibia position during disturbed and undisturbed unilateral standing. Ten uninjured potential coper and non-coper subjects stood in unilateral stance on a platform that translated anteriorly, posteriorly and laterally. Knee angle and tibia position with reference to the femur were calculated before and after platform movement. During perturbation trials, potential copers maintained kinematics that were similar to uninjured subjects across conditions. Conversely, non-copers stood with greater knee flexion than uninjured subjects and a tibia position that was more posterior than the other groups. Both non-copers and potential copers demonstrated small changes in tibia position following platform movement, but direction of movement was not similar. The similarities between the knee kinematics of potential copers and uninjured subjects suggest that potential copers compensated well from their injury by utilizing analogous dynamic knee stabilization strategies. In comparison to the other groups, by keeping the knee in greater flexion and the tibia in a more posterior position, non-copers appear to constrain the tibia in response to a challenging task, which is consistent with a "stiffening strategy".Based on the poor functional outcomes of non-copers, a stiffening strategy does not lead to dynamic knee stability, and the strategy may increase compressive forces which could contribute to or exacerbate articular cartilage degeneration.

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Diagnosis of an ACL disruption with KT-1000 arthrometer measurements

Cited by 112 publications

References 49 publications

Comparision of dynamic and static balance in adolescents handball and soccer players

Comparision of dynamic and static balance in adolescents handball and soccer players

How the fixation method stiffness and initial tension affect anterior load?displacement of the knee and tension in anterior cruciate ligament grafts: a study in cadaveric knees using a double-loop hamstrings graft

Evidence for differential control of tibial position in perturbed unilateral stance after acute ACL rupture

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