The effect of osseous ankle configuration on chronic ankle instability

Frigg, Arno; Magerkurth, Olaf; Valderrábano, Víctor; Ledermann, Hans-Peter; Hintermann, Beat

doi:10.1136/bjsm.2006.032672

Cited by 57 publications

(41 citation statements)

References 40 publications

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“…The evaluation was performed in the frontal plane only. Measurements of the sagittal mortise radius have already been published by Frigg et al (2007). These authors evaluated lateral radiographs of chronic ligamentous instability of the ankles and of a matched control group.…”

Section: Discussionmentioning

confidence: 99%

“…The measurements from the lateral X-rays (sagittal plane) have been recently reported by Frigg et al (2007) in a recently published work.…”

Section: Methodsmentioning

confidence: 98%

“…1). A DICOM/PACS application was used to carry out standardized measurements of the ankle joints on digital X-rays as described by Frigg et al (2007) and Magerkurth et al (2006). All ankle radiograph measurements were performed on a radiology workstation with a digital high resolution flat panel system with flat detector technology (Aristos FX 1 ; Siemens, Erlangen, Germany).…”

Section: Methodsmentioning

confidence: 99%

“…Whereas the configuration of the talar edge is well described for the sagittal plane (lateral X-rays) (Frigg et al, 2007), no data are available for the even more important talar edge configuration in the coronal plane [anterior-posterior (AP) X-rays].…”

Section: Introductionmentioning

confidence: 99%

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Radiographic evaluation of frontal talar edge configuration for osteochondral plug transplantation

et al. 2008

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For successful reconstruction of osteochondral lesions of the talus, the anatomic configuration of the talar edge must be respected. This study evaluated the radiographic configuration of the talar edge in the anterior-posterior (AP) view by analyzing medial and lateral talar edge angles and radii in 81 patients with a true AP view and without ankle pathology. The mean lateral talar edge angle was 91.8 degrees , and the mean medial talar edge angle was 110.0 degrees . The medial frontal talar edge radius was 4.8 mm and the lateral 3.5 mm, respectively. No correlation between angle and radius was found. These results revealed a significant difference between the medial and the lateral talar edge configuration. This may be due to the three-dimensional function of the human ankle joint. No study so far has addressed these differences radiologically. These differences should be addressed in the reconstruction of osteochondral lesions and be included in the preoperative planning.

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Section: Discussionmentioning

confidence: 99%

“…The measurements from the lateral X-rays (sagittal plane) have been recently reported by Frigg et al (2007) in a recently published work.…”

Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Radiographic evaluation of frontal talar edge configuration for osteochondral plug transplantation

et al. 2008

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“…In a previous study, the osseous configuration of the ankle joint has been identified as another intrinsic risk factor for mechanical instability. The authors showed that a chronic unstable ankle might be characterised by a smaller tibiotalar sector, larger talar radius and increased talar height 4. These measurements have been made on lateral radiographs only.…”

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confidence: 99%

Frontal and lateral characteristics of the osseous configuration in chronic ankle instability

et al. 2008

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Correlation of dynamic cartilage contact stress aberrations with severity of instability in ankle incongruity

Tochigi

Rudert

McKinley

et al. 2008

Journal Orthopaedic Research

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Joint instability is presumed to cause abnormality in cartilage contact mechanics, which accumulatively damages articular surface over years, leading to osteoarthritis. The purpose of this study was to clarify the effect of instability on dynamic cartilage contact mechanics. Using human ankle cadaver specimens, potentially unstable ankles were modeled by introducing a coronally-directed step-off incongruity of the anterior tibial surface and/or by transecting the anterior talofibular ligament. Specimens were subjected to a duty cycle with quasi-physiologic stance-phase motion and loading. AP tibial forces were modulated, causing a controlled, quantifiable ankle subluxation during the duty cycle. Instantaneous changes in local articular contact stresses in the ankle were continuously measured using a thin and flexible pressure transducer. Tests were repeated while varying the tibial surface condition (anatomic, 1mm step-off, and 2mm step-off), both before/after transection of the anterior talofibular ligament, with various AP force magnitudes, so that situations of various degrees of instability were created for each specimen. Instability events occurred in ankles when the step-off incongruity was introduced, with the abnormality in joint kinematics being greater after ligament transection. Contact stress data revealed that these instability events involved distinctly abrupt increases/decreases in local articular contact stresses, and that the degree of abruptness was correlated very nearly linearly with the abnormality in joint kinematics. The severity of cartilage contact stress aberration appeared to be correlated closely with the degree of instability. Given this linear relationship, even small instability events presumably involve appreciable abnormality in dynamic joint contact mechanics.

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The effect of osseous ankle configuration on chronic ankle instability

Abstract: CAI is associated with an unstable osseous joint configuration characterised by a larger radius of the talus and a smaller tibiotalar sector. There is evidence that a higher talus might also play some part, particularly in women.

Cited by 57 publications

References 40 publications

Radiographic evaluation of frontal talar edge configuration for osteochondral plug transplantation

Radiographic evaluation of frontal talar edge configuration for osteochondral plug transplantation

Frontal and lateral characteristics of the osseous configuration in chronic ankle instability

Correlation of dynamic cartilage contact stress aberrations with severity of instability in ankle incongruity

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