{"id":19522,"date":"2026-09-04T08:47:47","date_gmt":"2026-09-04T06:47:47","guid":{"rendered":"https:\/\/centre-assal.ch\/?post_type=publications&#038;p=19522"},"modified":"2026-09-07T08:49:14","modified_gmt":"2026-09-07T06:49:14","slug":"weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity","status":"publish","type":"publications","link":"https:\/\/centre-assal.ch\/en\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/","title":{"rendered":"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity"},"content":{"rendered":"<p><strong>Abstract<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Background:<\/strong> Middle facet subluxation (MFS) of the subtalar joint is a key indicator of peritalar subluxation in progressive<br \/>\ncollapsing foot deformity (PCFD). Although its assessment relies on weightbearing computed tomography (WBCT),<br \/>\nit remains unclear which weightbearing radiographic (WBR) measurements correlate with MFS. We hypothesize that<br \/>\nradiographic parameters assessing hindfoot alignment are correlated with MFS.<br \/>\n<strong>Methods:<\/strong> Seventy-three feet diagnosed with PCFD were evaluated using WBR and WBCT. Five parameters were<br \/>\nmeasured in both modalities: talonavicular coverage (TNC) angle, hindfoot moment arm (HMA), talo\u2013first metatarsal<br \/>\nangle, calcaneal pitch angle, and sinus tarsi impingement. MFS was then measured on WBCT. Multivariate and bivariate<br \/>\nregression analyses were used to identify which WBR measurements predict or correlate with MFS. Partition analysis was<br \/>\nused to identify cutoff values for WBR measurements linked with MFS.<br \/>\n<strong>Results:<\/strong> Multivariate regression identified TNC angle and HMA as combined MFS predictors (R\u00b2 = 0.524, P &lt; .0001). In the<br \/>\nbivariate analysis, TNC angle demonstrated a moderate individual correlation with MFS (r = 0.68), whereas HMA showed<br \/>\na weak individual correlation (r = 0.39). Partition analysis identified practical radiographic thresholds (TNC angle \u2265 38<br \/>\ndegrees, HMA \u2265 11.4 mm) for MFS \u226518% yet these thresholds explained only 27.3% of variability (R\u00b2 = 0.273).<br \/>\n<strong>Conclusion:<\/strong> TNC angle and HMA are the most useful WBR measurements for identifying MFS in PCFD. In settings without<br \/>\nWBCT access, these offer a practical assessment tool, associated with MFS \u226518%; however, these cutoffs accounted for<br \/>\nonly 27.3% of variance (R\u00b2 = 0.273), underscoring residual unexplained factors.<br \/>\n<strong>Level of Evidence:<\/strong> Level III, retrospective comparative study.<\/p>","protected":false},"featured_media":0,"template":"","categorie_publications":[89],"class_list":["post-19522","publications","type-publications","status-publish","hentry","categorie_publications-article-scientifique"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity - Centre ASSAL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/centre-assal.ch\/en\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity - Centre ASSAL\" \/>\n<meta property=\"og:description\" content=\"Abstract &nbsp; Background: Middle facet subluxation (MFS) of the subtalar joint is a key indicator of peritalar subluxation in progressive collapsing foot deformity (PCFD). Although its assessment relies on weightbearing computed tomography (WBCT), it remains unclear which weightbearing radiographic (WBR) measurements correlate with MFS. We hypothesize that radiographic parameters assessing hindfoot alignment are correlated with [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/centre-assal.ch\/en\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/\" \/>\n<meta property=\"og:site_name\" content=\"Centre ASSAL\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-07T06:49:14+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/publications\\\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\\\/\",\"url\":\"https:\\\/\\\/centre-assal.ch\\\/publications\\\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\\\/\",\"name\":\"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity - Centre ASSAL\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/#website\"},\"datePublished\":\"2026-09-04T06:47:47+00:00\",\"dateModified\":\"2026-09-07T06:49:14+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/publications\\\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\\\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/centre-assal.ch\\\/publications\\\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/publications\\\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/centre-assal.ch\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/#website\",\"url\":\"https:\\\/\\\/centre-assal.ch\\\/\",\"name\":\"Centre ASSAL\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/centre-assal.ch\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/#organization\",\"name\":\"Centre Assal\",\"url\":\"https:\\\/\\\/centre-assal.ch\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/centre-assal.ch\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/Logo_CentreAssal_RVB-11.png\",\"contentUrl\":\"https:\\\/\\\/centre-assal.ch\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/Logo_CentreAssal_RVB-11.png\",\"width\":220,\"height\":114,\"caption\":\"Centre Assal\"},\"image\":{\"@id\":\"https:\\\/\\\/centre-assal.ch\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.instagram.com\\\/centre_assal\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/centre-assal\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity - Centre ASSAL","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/centre-assal.ch\/en\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/","og_locale":"en_GB","og_type":"article","og_title":"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity - Centre ASSAL","og_description":"Abstract &nbsp; Background: Middle facet subluxation (MFS) of the subtalar joint is a key indicator of peritalar subluxation in progressive collapsing foot deformity (PCFD). Although its assessment relies on weightbearing computed tomography (WBCT), it remains unclear which weightbearing radiographic (WBR) measurements correlate with MFS. We hypothesize that radiographic parameters assessing hindfoot alignment are correlated with [&hellip;]","og_url":"https:\/\/centre-assal.ch\/en\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/","og_site_name":"Centre ASSAL","article_modified_time":"2026-09-07T06:49:14+00:00","twitter_card":"summary_large_image","twitter_misc":{"Estimated reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/centre-assal.ch\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/","url":"https:\/\/centre-assal.ch\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/","name":"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity - Centre ASSAL","isPartOf":{"@id":"https:\/\/centre-assal.ch\/#website"},"datePublished":"2026-09-04T06:47:47+00:00","dateModified":"2026-09-07T06:49:14+00:00","breadcrumb":{"@id":"https:\/\/centre-assal.ch\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/centre-assal.ch\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/centre-assal.ch\/publications\/weightbearing-radiographic-predictors-of-middle-facet-subluxation-in-progressive-collapsing-foot-deformity\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/centre-assal.ch\/"},{"@type":"ListItem","position":2,"name":"Weightbearing Radiographic Predictors of Middle Facet Subluxation in Progressive Collapsing Foot Deformity"}]},{"@type":"WebSite","@id":"https:\/\/centre-assal.ch\/#website","url":"https:\/\/centre-assal.ch\/","name":"Centre ASSAL","description":"","publisher":{"@id":"https:\/\/centre-assal.ch\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/centre-assal.ch\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/centre-assal.ch\/#organization","name":"Centre Assal","url":"https:\/\/centre-assal.ch\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/centre-assal.ch\/#\/schema\/logo\/image\/","url":"https:\/\/centre-assal.ch\/wp-content\/uploads\/2025\/03\/Logo_CentreAssal_RVB-11.png","contentUrl":"https:\/\/centre-assal.ch\/wp-content\/uploads\/2025\/03\/Logo_CentreAssal_RVB-11.png","width":220,"height":114,"caption":"Centre Assal"},"image":{"@id":"https:\/\/centre-assal.ch\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.instagram.com\/centre_assal\/","https:\/\/www.linkedin.com\/company\/centre-assal"]}]}},"_links":{"self":[{"href":"https:\/\/centre-assal.ch\/en\/wp-json\/wp\/v2\/publications\/19522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/centre-assal.ch\/en\/wp-json\/wp\/v2\/publications"}],"about":[{"href":"https:\/\/centre-assal.ch\/en\/wp-json\/wp\/v2\/types\/publications"}],"wp:attachment":[{"href":"https:\/\/centre-assal.ch\/en\/wp-json\/wp\/v2\/media?parent=19522"}],"wp:term":[{"taxonomy":"categorie_publications","embeddable":true,"href":"https:\/\/centre-assal.ch\/en\/wp-json\/wp\/v2\/categorie_publications?post=19522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}