Subtalar Joint Configuration on Weightbearing CT Scan

Colin, Fabrice; Lang, Tamara Horn; Zwicky, Lukas; Hintermann, Beat; Knupp, Markus

doi:10.1177/1071100714540890

Cited by 91 publications

(72 citation statements)

References 26 publications

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“…In a weight-bearing computed tomography (CT) examination, 88% of the patients had a concave shape of the posterior facet and most patients showed a valgus orientation of the posterior facet. 1 However, some patients presented with a varus-oriented posterior facet or a flat surface as opposed to a concave shape. 1 Preoperative MRI or CT scans may therefore be helpful to determine which approach best exposes the articulating surfaces.…”

Section: Surgical Anatomymentioning

confidence: 99%

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Medial Approach to the Subtalar Joint

Knupp¹,

Zwicky²,

Lang³

et al. 2015

Foot and Ankle Clinics

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Section: Surgical Anatomymentioning

confidence: 99%

“…1 However, some patients presented with a varus-oriented posterior facet or a flat surface as opposed to a concave shape. 1 Preoperative MRI or CT scans may therefore be helpful to determine which approach best exposes the articulating surfaces.…”

Section: Surgical Anatomymentioning

confidence: 99%

Medial Approach to the Subtalar Joint

Knupp¹,

Zwicky²,

Lang³

et al. 2015

Foot and Ankle Clinics

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“…Our method with advanced 3D imaging and shape analysis was applied to more fully account for the 3D morphology. Previous studies are limited in their assessment of the 3D orientation because the studies solely utilized a single anatomical plane …”

Section: Discussionmentioning

confidence: 99%

“…In analogy to previous studies, the SVA was determined in three coronal planes (Fig. ) . A middle coronal plane of the posterior facet was defined by the midpoint between its most posterior and anterior points.…”

Section: Methodsmentioning

confidence: 99%

“…However, even in this imaging modality the determination of angles is dependent on the selected plane(s). This is illustrated by the finding that SVA values are different between coronal planes through the facet at different locations along the anteroposterior axis . Until recently, CT was limited to non‐weight‐bearing conditions, but weight‐bearing CT scans have shown advantages above plain radiographs and non‐weight‐bearing CT .…”

mentioning

confidence: 99%

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Study on the three‐dimensional orientation of the posterior facet of the subtalar joint using simulated weight‐bearing CT

Kleipool

Dahmen

Vuurberg

et al. 2018

Journal Orthopaedic Research

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The purpose of this study was to describe the normal 3D orientation and shape of the subtalar calcaneal posterior facet. This is not adequately described in current literature. In a supine position both feet of 20 healthy subjects were imaged in a simulated weight‐bearing CT. A cylinder and plane were fitted to the posterior facet of the surface model. The orientation of both shapes was expressed by two angles in (1) the CT‐based coordinate system with the axis of the foot aligned with the sagittal axis and (2) a coordinate system based on the geometric principal axes of the subject's calcaneus. The subtalar vertical angle was determined in the intersection in three different coronal planes of the cylinder. The cylinder's axis oriented from supero‐postero‐laterally to infero‐antero‐medially. The plane's normal directed supero‐antero‐medially in the CT‐based coordinate system, and supero‐antero‐laterally in the other coordinate system. The subtalar vertical angle was significantly different (p < 0.001) between the three defined coronal planes and increased from anterior to posterior. The mean diameter of the fitted cylinder was 42.0 ± 7.7 mm and the root mean square error was 0.5 ± 0.1 mm. The posterior facet can be modelled as a segment of a cylinder with a supero‐postero‐lateral to infero‐antero‐medial orientation. The morphometry of the posterior facet in a healthy population serves as a reference in identifying abnormal subtalar joint morphology. More generally this study shows the need to include the full 3D morphology in assessing the orientation of the subtalar posterior facet. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 9999:1–8, 2018.

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Imaging of the subtalar joint: A novel approach to an old problem

Krähenbühl

Lenz

Lisonbee

et al. 2019

Journal Orthopaedic Research

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Evaluation of the subtalar joint using conventional radiographs is difficult. The purpose of this study was to assess how the posterior facet of the subtalar joint is projected on eight standard radiographic views of the foot and ankle. Weightbearing computed tomography (CT) scans of 27 volunteers without ankle pathology were performed. Eight standard views of the foot and ankle (antero‐posterior [AP] view, mortise view, subtalar view, four different Broden views) were reconstructed using digitally reconstructed radiographs (DRRs). The appearance of the posterior facet of the subtalar joint was assessed for each view. In addition, the position of the joint line was projected onto three‐dimensional (3‐D) models of the calcaneus. We found (i) on the AP view of the ankle joint, the posterior part of the posterior facet is visualized and appears convex (calcaneal side); (ii) on the mortise view of the ankle joint, a slightly more anterior part (compared to the AP view) is visualized and appears either convex or flat; (iii) on the subtalar view, the anterior part of the posterior facet is visualized and appears either convex, flat or concave; and (iv) using the Broden views, the posterior and anterior part of the posterior facet can be visualized. This study clarifies which parts of the posterior facet of the subtalar joint are visualized on eight standard views of the foot and ankle. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res

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Subtalar Joint Configuration on Weightbearing CT Scan

Abstract: Knowledge of subtalar joint morphology could help clarify why certain failures have occurred in reconstructive hindfoot surgery and thus might help plan the surgical procedure to reduce these failures in the future.

Cited by 91 publications

References 26 publications

Medial Approach to the Subtalar Joint

Medial Approach to the Subtalar Joint

Study on the three‐dimensional orientation of the posterior facet of the subtalar joint using simulated weight‐bearing CT

Imaging of the subtalar joint: A novel approach to an old problem

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