Preventive lateral ligament tester (PLLT): a novel method to evaluate mechanical properties of lateral ankle joint ligaments in the intact ankle

Best, Raymond; Böhle, Caroline; Mauch, Frieder; Brüggemann, Peter

doi:10.1007/s00167-014-3190-3

Cited by 4 publications

(3 citation statements)

References 36 publications

(90 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All specimens were positioned with their mechanical tibial axis coinciding with the rotational axis of the 858 Mini Bionix ® by use of a fixed laser beam. Furthermore, the specimens were placed in 20° of plantar flexion and 15° of hindfoot inversion to simulate the kinematics during ankle sprain [ 3 , 25 ]. The specially designed mounting platform enables fixation of the calcaneus with a 4.5-mm Steinmann pin.…”

Section: Methodsmentioning

confidence: 99%

Biomechanical stability of tape augmentation for anterior talofibular ligament (ATFL) repair compared to the native ATFL

Willegger

Benca

Hirtler

et al. 2016

Knee Surg Sports Traumatol Arthrosc

View full text Add to dashboard Cite

PurposeCurrent methods of anterior talofibular ligament (ATFL) reconstruction fail to restore the stability of the native ATFL. Therefore, augmented anatomic ATFL reconstruction gained popularity in patients with attenuated tissue and additional stress on the lateral ankle ligament complex. The aim of the present study was to evaluate the biomechanical stability of the InternalBrace® (Arthrex Inc., Naples, FL, USA), a tape augmentation designed to augment the traditional Broström procedure. MethodsTwelve (12) fresh-frozen human anatomic lower leg specimens were randomized into two groups: a native ATFL (ATFL) and a tape augmentation group (IB). Dual-energy X-ray absorptiometry (DEXA) scans were carried out to determine bone mineral density (BMD) of the specimens. The ligaments were stressed by internally rotating the tibia against the inverted fixated hindfoot. Torque at failure (Nm) and angle at failure (°) were recorded.ResultsThe ATFL group failed at an angle of 33 ± 10°. In the IB group, construct failure occurred at an angle of 46 ± 16°. Failure torque reached 8.3 ± 4.5 Nm in the ATFL group, whereas the IB group achieved 11.2 ± 7.1 Nm. There was no correlation between angle at ATFL or IB construct failure or torque at failure, respectively, and BMD for both groups.ConclusionThis study reveals that tape augmentation for ATFL reconstruction shows similar biomechanical stability compared to an intact native ATFL in terms of torque at failure and angle at failure. BMD did not influence the construct stability. Tape augmentation proved an enhanced initial stability in ATFL reconstruction which may allow for an accelerated rehabilitation process.Level of evidence II.

show abstract

Section: Methodsmentioning

confidence: 99%

Biomechanical stability of tape augmentation for anterior talofibular ligament (ATFL) repair compared to the native ATFL

Willegger

Benca

Hirtler

et al. 2016

Knee Surg Sports Traumatol Arthrosc

View full text Add to dashboard Cite

show abstract

“…In summary, there were six devices measuring inversion–eversion, of these only one device reported validity in terms of specificity and sensitivity . Other devices inferred a certain degree of validity from in vitro cadaver experiments . While some experimenters measured rotational stiffness as a means of joint excursion in degrees per Nm, most other results were summarized as the inversion range of motion (ROM), sometimes the entire ROM including eversion was measured.…”

Section: Resultsmentioning

confidence: 99%

“…In recent literature, arthrometer measurements have been used for quantifying mechanical characteristics in CAI populations. Generally, the differentiation performed by using an arthrometer for assessing mechanical instability is regarded as a “quasi” objective method . However, the biomechanical principles underlying the different devices are not always reported.…”

Section: Rationale and Objectivesmentioning

confidence: 99%

In vivo arthrometer measurements of mechanical ankle instability—A systematic review

Lohrer²,

Gollhofer

et al. 2019

Journal Orthopaedic Research

View full text Add to dashboard Cite

Chronic ankle instability is caused by functional and/or mechanical deficits. To differentiate the two entities, mechanical ankle instability can be assessed using arthrometers. The measurement of mechanical instability is essential, since it can only be addressed surgically. The aim of this systematic literature review was to find out whether chronic mechanical ankle instability could be adequately and objectively assessed using in vivo arthrometer measurements. Articles were included if the main focus was to evaluate the contribution of mechanical deficits to chronic ankle instability and if they provided sufficient description of the device used. This systematic review was performed according to the PRISMA-recommendations. Initially 47 articles were screened for eligibility, of which 33 studies reporting 10 different devices were included. While the reliability of the measurements was mostly good to excellent, only two studies aimed to assess the sensitivity and specificity of their results in regard to chronic ankle instability. Several devices reported conflicting results about mechanical deficits. In summary, this systematic review reveals a substantial deficit in diagnostic accuracy when assessing mechanical ankle instability in a clinical setting. Biases in recruiting and classification of participants raise the question whether the two entities of functional and mechanical ankle instability are properly defined. Clinical Significance: In recent years, this may have led to a misinterpretation of mechanical deficits and the subsequent need for surgical intervention. ß 2019

show abstract

Luxation des oberen Sprunggelenks ohne ossäre Läsion

2018

View full text Add to dashboard Cite

Preventive lateral ligament tester (PLLT): a novel method to evaluate mechanical properties of lateral ankle joint ligaments in the intact ankle

Cited by 4 publications

References 36 publications

Biomechanical stability of tape augmentation for anterior talofibular ligament (ATFL) repair compared to the native ATFL

Biomechanical stability of tape augmentation for anterior talofibular ligament (ATFL) repair compared to the native ATFL

In vivo arthrometer measurements of mechanical ankle instability—A systematic review

Luxation des oberen Sprunggelenks ohne ossäre Läsion

Contact Info

Product

Resources

About