Journal article
Three-Dimensional Distance and Coverage Maps in the Assessment of Peritalar Subluxation in Progressive Collapsing Foot Deformity
Foot & ankle international, Vol.42(6), pp.757-767
06/2021
DOI: 10.1177/1071100720983227
PMID: 33504217
Abstract
Progressive collapsing foot deformity (PCFD), formerly termed
, is a complex 3-dimensional (3D) deformity of the foot characterized by peritalar subluxation (PTS). PTS is typically measured at the posterior facet, but recent studies have called this into question. The objective of this study was to use 3D distance mapping (DM) from weightbearing computed tomography (WBCT) to assess PTS in patients with PCFD and controls. We hypothesized that DMs would identify the middle facet as a superior marker for PTS.
We analyzed WBCT data of 20 consecutive stage I patients with PCFD and 10 control patients with a novel DM technique to objectively characterize joint coverage across the entire peritalar surface, including both articular and nonarticular regions. Joint coverage was defined as the percentage of articular area with DMs <4 mm and impingement when distances were <0.5 mm. Comparisons were performed with independent
tests or Wilcoxon tests.
values <.05 were considered significant.
Overall, coverage was decreased in articular regions and impingement was increased in nonarticular regions of patients with PCFD with a significant increase in uncoverage in the middle (46.6%,
< .001) but not anterior or posterior facets. Significant increases in sinus tarsi coverage were identified (98.0%,
< .007) with impingement in 6 of 20 patients with PCFD. Impingement of the subfibular region was noted in only 1 of 20 cases but narrowing greater than 2 standard deviations was noted in 17 of 20 patients.
Objective DMs identified significant markers of PTS in the middle but not posterior or anterior facets. We confirmed prior 2-dimensional data that suggested uncoverage of the middle facet provided a more robust and consistent measure of PTS than measures in the posterior facet.
Level III, case-control study.
Details
- Title: Subtitle
- Three-Dimensional Distance and Coverage Maps in the Assessment of Peritalar Subluxation in Progressive Collapsing Foot Deformity
- Creators
- Kevin N Dibbern - Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USAShuyuan Li - University of IowaVictoria Vivtcharenko - University of IowaElijah Auch - University of IowaFrancois Lintz - Ramsay GDS-Clinique de L'Union, Saint Jean, France.Scott J Ellis - Hospital for Special SurgeryJohn E Femino - University of IowaCesar de Cesar Netto - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Foot & ankle international, Vol.42(6), pp.757-767
- DOI
- 10.1177/1071100720983227
- PMID
- 33504217
- ISSN
- 1071-1007
- eISSN
- 1944-7876
- Language
- English
- Date published
- 06/2021
- Academic Unit
- Orthopedics and Rehabilitation
- Record Identifier
- 9984304688702771
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