The geometrical axis of the talocrural joint—Suggestions for a new measurement of the talocrural joint axis

Claaßen, Leif; Luedtke, Philipp; Yao, Daiwei; Ettinger, Sarah; Daniilidis, Kiriakos; Nowakowski, A; Mueller-Gerbl, Magdalena; Stukenborg-Colsman, Christina

doi:10.1016/j.fas.2018.02.003

Cited by 21 publications

(24 citation statements)

References 40 publications

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“…First, the 3D below‐the‐knee surface model was oriented to the reference points, which are in accordance with the recommendations by the International Society of Biomechanics (ISB) 11 and were used in the previous studies 3,12–14 …”

Section: Methodsmentioning

confidence: 99%

“… 18 Further, a cylinder best fitting the superior articular surface of the talus was created, as described previously (Figure 2B). 3 The axis of the cylinder was defined to be the axis of the talus dome (Figure 2C). The center of mass of the superior articular surface of the talar dome was determined using a cutting plane with the Z ‐axis as a normal vector (Figure 2D).…”

Section: Methodsmentioning

confidence: 99%

“…The center of mass of the superior articular surface of the talar dome was determined using a cutting plane with the Z ‐axis as a normal vector (Figure 2D). The articular surface of the talus dome was defined as the area between the transition from convexity and concavity from talus dome to talus neck anteriorly and to the process posterior tali posteriorly 3 . The mediolateral borders were defined by the shoulders of the talus dome.…”

Section: Methodsmentioning

confidence: 99%

“…The failure rates of TAR, however, are more than twice as high as the rates after total hip and knee replacements 2 . Reasons might be an insufficient consideration of the anatomy as well as the limited predictability due to the use of conventional radiographs for planning of the prosthesis 3 . In coronal and sagittal planes, component positioning is ensured with preoperative weight‐bearing radiographs and intraoperative extramedullary referencing 4–7 .…”

Section: Introductionmentioning

confidence: 99%

“…The articular surface of the talus dome was defined as the area between the transition from convexity and concavity from talus dome to talus neck anteriorly and to the process posterior tali posteriorly. 3 The mediolateral borders were defined by the shoulders of the talus dome. We defined the axis between the center of mass of the superior articular surface of the talus and the center of the talar head as the talus neck axis ( Figure 2C-E).…”

mentioning

confidence: 99%

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Talar neck angle correlates with tibial torsion—Guidance for 3D and 2D measurements in total ankle replacement

Flury

Viehöfer

Hoch

et al. 2020

Journal Orthopaedic Research

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Axial plane alignment of the talar component in total ankle arthroplasty is poorly understood and remains a major issue, especially since malpositioning results in increased peak pressure and rotational torque. Further profound knowledge regarding individual anatomy of the talus and its relation to proximal and distal osseous structures is therefore needed. Therefore, three-dimensional (3D) surface models of 50 lower extremities were generated using computed tomography data of patients without ankle osteoarthritis. The talus neck torsion was measured using a novel 3D measurement method. Then, tibial torsion and subtalar joint axis orientation were measured and correlated to the talus neck torsion. Moreover, a 2D measurement method of the talus neck torsion was developed. A statistically significant correlation was found between external tibia torsion and medial talus neck torsion, as well as talus neck axis and subtalar joint axis in the transversal and frontal plane. The novel defined 3D measurement methods indicated excellent inter-rater and intra-rater reliability. The 2D measurement method of the talus neck torsion was in good agreement with the 3D method. The results showed that the rotational profiles of the tibia, talus, and adjacent joints are interconnected, which should be considered in total ankle replacement (TAR). Clinical relevance: This study improves the overall understanding of the talar anatomy, as well as its relationship to adjacent osseous structures. The novel 2D measurement method of the talus neck torsion might improve talar component positioning in the axial plane corresponding to the patient's individual anatomy, and therefore improve the survival rate of TAR. K E Y W O R D S extramedullary referencing, talar neck torsion, total ankle replacement 1 | INTRODUCTION Osteoarthritis of the ankle is an increasing issue with about 1% of the adult population affected. 1 For end-stage osteoarthritis, total ankle replacement (TAR) represents an evolving method of treatment. The failure rates of TAR, however, are more than twice as high as the rates after total hip and knee replacements. 2 Reasons might be an insufficient consideration of the anatomy as well as the limited predictability due to the use of conventional radiographs for planning of the prosthesis. 3 In coronal and sagittal planes, component positioning is ensured with preoperative weight-bearing radiographs and intraoperative extramedullary

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Talar neck angle correlates with tibial torsion—Guidance for 3D and 2D measurements in total ankle replacement

Flury

Viehöfer

Hoch

et al. 2020

Journal Orthopaedic Research

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Three‐dimensional ankle, subtalar, and hindfoot alignment of the normal, weightbearing hindfoot, in bilateral posture

Stolle

Lintz

Netto

et al. 2022

Journal Orthopaedic Research

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The first goal of this study was to develop reliable three‐dimensional definitions of alignment for the ankle, subtalar, and hindfoot joints. These alignments are based on three‐dimensional morphological features derived from renderings of the bones obtained from weightbearing computer tomography. The second goal was to establish a database quantifying the alignment of the ankle, subtalar, and hindfoot joints in a healthy population during weightbearing bilateral standing. This level 1 study was performed on 95 normal subjects in which random subjects were recruited into a control group. Weightbearing computed tomography scans of the leg were collected in neutral, bilateral, standing posture. In 30 of the subjects, both the left and right leg was scanned. Six alignment parameters for each joint were calculated from morphological measurements conducted on three‐dimensional renderings of the bones. Intra‐ and intertester reliability was assessed from repeated measurements by several testers. Analysis of variance statistics of the alignment parameters showed no statistical differences due to age, gender, or foot side. Intraclass correlation coefficient analysis showed excellent inter‐ and intratester reliability. It was concluded that the alignment process is comprehensive and reliable. Therefore, without classification by gender or age, it may be used as a foundation for quantifying abnormal alignment associated with various ankle deformities. Clinical significance: The alignment methodology and control database may be used to diagnose ankle, subtalar, and hindfoot misalignment. It can also serve as basis for surgical planning designed to restore normal alignment in various hindfoot pathologies, such as ankle realignment in total ankle replacement.

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Digital twins, artificial intelligence, and machine learning technology to identify a real personalized motion axis of the tibiotalar joint for robotics in total ankle arthroplasty

Hernigou

Olejnik

Safar

et al. 2021

International Orthopaedics (SICOT)

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The geometrical axis of the talocrural joint—Suggestions for a new measurement of the talocrural joint axis

Cited by 21 publications

References 40 publications

Talar neck angle correlates with tibial torsion—Guidance for 3D and 2D measurements in total ankle replacement

Talar neck angle correlates with tibial torsion—Guidance for 3D and 2D measurements in total ankle replacement

Three‐dimensional ankle, subtalar, and hindfoot alignment of the normal, weightbearing hindfoot, in bilateral posture

Digital twins, artificial intelligence, and machine learning technology to identify a real personalized motion axis of the tibiotalar joint for robotics in total ankle arthroplasty

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