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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/3998

Title: Morphologic Analysis of Nonosseous Talocalcaneal Coalitions Using 3D Reconstruction.
Other Titles: 3次元再構成を用いた非骨性距踵骨癒合症の形態学的分析
Authors: Yoneda, Azusa
Tanaka, Yasuhito
Fujii, Hiromasa
Isomoto, Shinji
Sugimoto, Kazuya
Keywords: talocalcaneal coalition
3-dimensional computed tomography
calcaneal articular surface
Issue Date: 19-Oct-2021
Publisher: Sage
Citation: Foot and ankle orthopaedics Vol.6 No.4 Article No.24730114211039487 (2021 Oct)
Abstract: Background: Resection of talocalcaneal coalitions has generally involved osseous coalitions. We attempted to evaluate the morphology of nonosseous talocalcaneal coalitions. This study aimed to investigate if the calcaneal articular surface area of feet with talocalcaneal coalitions is different than that of normal feet. Methods: Twenty nonosseous talocalcaneal coalition cases with analyzable computed tomography (CT) scans were compared to 20 control cases. Three-dimensional models of the talus and calcaneus were constructed, and the surface areas of the posterior facet (SPF), whole talocalcaneal joint of the calcaneus (SWJ), and coalition site (SCS) of each 3D-CT model were measured. "Calibrated" values of the 2 groups were created to adjust for relative size of the tali and then compared. The preoperative and postoperative AOFAS Ankle-Hindfoot scale was calculated for 9 cases that had undergone single coalition resection. Results: The calibrated SPF and SWJ were significantly greater in the coalition group than in the control group (40% and 12%, respectively). No significant difference was detected between the calibrated (SWJ - SCS) value of the coalition group and the calibrated SWJ value of the control group. The AOFAS scale was improved postoperatively in all 9 cases analyzed. Conclusion: The calcaneal articular surface of nonosseous talocalcaneal coalition feet in our series was larger than that of the normal feet. This study indicates that the total calcaneal articular surface after coalition resection may be comparable to the calcaneal articular surface of normal feet. We suggest that the indication for coalition resection be reconsidered for nonosseous coalition. Level of evidence: Level III, retrospective comparative study.
Description: 博士(医学)・甲第815号・令和4年3月15日
© The Author(s) 2021. Creative Commons Non Commercial CC BY-NC: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/ open-access-at-sage).
URI: http://hdl.handle.net/10564/3998
ISSN: 24730114
DOI: https://doi.org/10.1177/24730114211039487
Academic Degrees and number: 24601A815
Degree-granting date: 2022-03-15
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2021年度

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