期刊
FOOT & ANKLE INTERNATIONAL
卷 43, 期 1, 页码 96-100出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/10711007211040820
关键词
flatfoot; PCFD; weightbearing computed tomography; WBCT; foot and ankle offset; FAO; middle; facet; subluxation; angle
类别
The study found a correlation between MF subluxation and FAO, with 27.5% subluxation identified as a threshold for increased FAO. These findings may assist surgeons in optimizing treatment decisions for PCFD patients.
Background: Subtalar middle facet (MF) subluxation was recognized as a reliable marker for progressive collapsing foot deformity (PCFD) diagnosis. Foot and Ankle Offset (FAO) is an established measurement, predictive of malalignment severity. The objective of this study was to assess the potential association between MF subluxation and FAO in PCFD patients. Methods: 56 individuals with flexible PCFD (74 feet) were assessed. Two blinded foot and ankle surgeons calculated MF uncoverage, MF incongruence, and FAO. Agreement was quantified using intraclass correlation coefficient (ICC). A multivariate regression analysis and partition prediction models were applied to assess relationship between values. Results: All ICCs were >0.80. MF subluxation and FAO were found to be correlated (r(s) = 0.56; P < .0001). Changes in the MF subluxation were noticeably explained by FAO and BMI (R-2 = 0.33). MF incongruence was not correlated with the assessed variables (P = .10). In this cohort, an MF subluxation of 27.5% was a threshold for increased FAO (FAO of 3.4%+/- 2.4% when below; FAO of 8.0% +/- 3.5% when above). Conclusion: We found a correlation between MF subluxation and FAO. An MF subluxation of 27.5% was found to be a threshold for higher FAO, which corresponded to a greater malalignment. These data may help surgeons optimize treatment decisions in PCFD patients.
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