This preprint is under consideration at BMC Musculoskeletal Disorders. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
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Research Article
Qinwei Guo
Peking University Third Hospital
Corresponding Author
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This work is licensed under a CC BY 4.0 License. Read Full License
Background Current classifications emphasize the morphology of the coalition, however, subtalar joint facets involved should also be emphasized.
Objective The objective of this study was to develop a new classification system based on the articular facets involved to cover all coalitions and guide operative planning.
Methods Patients were diagnosed with talocalcaneal coalition using a CT scan, between January 2009 and February 2021. We classified the coalition into four main types according to the shape and nature of the coalition: I, inferiorly overgrown talus or superiorly overgrown calcaneus; II, both talus and calcaneus overgrew; III, coalition with an accessory ossicle; (I-III types are non-osseous coalition) IV, complete osseous coalition. Then each type was further divided into three subtypes according to the articular facets involved. A, the coalition involving the anterior facets; M, the coalition involving the middle facets, and P, the coalition involving the posterior facets.
Results There were 106 patients (108 feet) included in this study. Overall, 8 feet (7.5%) were classified as type I, 75 feet (69.4%) as type II, 7 feet (6.5%) as type III, and 18 feet (16.7%) as type IV. Twenty-nine coalitions (26.9%) involved the posterior facets only (subtype-P), 74 coalitions (68.5%) involved both the middle and posterior facets (subtype-MP), and five coalitions (4.6%) simultaneously involved the anterior, middle, and posterior facets (subtype-AMP). Type II-MP coalition was the most common.
Conclusion A new classification system of the talocalcaneal coalition to facilitate operative planning was developed.
Keywords
talocalcaneal coalition, classification, articular facet, computed tomography
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No competing interests reported.
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CURRENT STATUS: Under Review
Version 1
Posted 26 May, 2021
No community comments so far
Reviews received
Received 12 Jun, 2021
Reviewers agreed
On 11 Jun, 2021
Reviewers invited
Invitations sent on 27 May, 2021
Editor assigned
On 24 May, 2021
Editor invited
On 24 May, 2021
Submission checks complete
On 24 May, 2021
First submitted
On 14 Apr, 2021
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Subject Areas
Orthopedics
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This preprint is under consideration at BMC Musculoskeletal Disorders. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Qinwei Guo
Peking University Third Hospital
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 26 May, 2021
No community comments so far
Reviews received
Received 12 Jun, 2021
Reviewers agreed
On 11 Jun, 2021
Reviewers invited
Invitations sent on 27 May, 2021
Editor assigned
On 24 May, 2021
Editor invited
On 24 May, 2021
Submission checks complete
On 24 May, 2021
First submitted
On 14 Apr, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Orthopedics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background Current classifications emphasize the morphology of the coalition, however, subtalar joint facets involved should also be emphasized.
Objective The objective of this study was to develop a new classification system based on the articular facets involved to cover all coalitions and guide operative planning.
Methods Patients were diagnosed with talocalcaneal coalition using a CT scan, between January 2009 and February 2021. We classified the coalition into four main types according to the shape and nature of the coalition: I, inferiorly overgrown talus or superiorly overgrown calcaneus; II, both talus and calcaneus overgrew; III, coalition with an accessory ossicle; (I-III types are non-osseous coalition) IV, complete osseous coalition. Then each type was further divided into three subtypes according to the articular facets involved. A, the coalition involving the anterior facets; M, the coalition involving the middle facets, and P, the coalition involving the posterior facets.
Results There were 106 patients (108 feet) included in this study. Overall, 8 feet (7.5%) were classified as type I, 75 feet (69.4%) as type II, 7 feet (6.5%) as type III, and 18 feet (16.7%) as type IV. Twenty-nine coalitions (26.9%) involved the posterior facets only (subtype-P), 74 coalitions (68.5%) involved both the middle and posterior facets (subtype-MP), and five coalitions (4.6%) simultaneously involved the anterior, middle, and posterior facets (subtype-AMP). Type II-MP coalition was the most common.
Conclusion A new classification system of the talocalcaneal coalition to facilitate operative planning was developed.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
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