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3D, Weightbearing Topographical Study of Periprosthetic Cysts and Alignment in Total Ankle Replacement.

Publication ,  Journal Article
Lintz, F; Mast, J; Bernasconi, A; Mehdi, N; de Cesar Netto, C; Fernando, C; International Weight-Bearing CT Society, ; Buedts, K
Published in: Foot Ankle Int
January 2020

BACKGROUND: We investigated the association between hindfoot residual malalignment assessed on weightbearing computed tomography (WBCT) images and the development of periprosthetic cysts (PPCs) after total ankle replacement (TAR). We hypothesized that PPCs would be found predominantly medially in the varus configuration and laterally in the valgus configuration. METHODS: Cases of primary TAR with available WBCT imaging of the ankle were included in this retrospective study. The location of the PPC was marked and the following volumes were calculated: total (TCV), medial (MCV), central (CCV), and lateral (LCV) cyst volumes. Hindfoot alignment was measured as Foot and Ankle Offset (FAO), with 95% confidence intervals (95% CIs) calculated to define varus (<95% CI) and valgus (>95% CI) groups. Cyst volumes were compared between these 2 groups. The American Orthopaedic Foot & Ankle Society (AOFAS) score at the time of the WBCT was also retrieved. Receiver operating characteristic (ROC) curves were used to determine FAO thresholds for predicting an increased risk of PPC. RESULTS: Forty-eight TARs (mean follow-up, 44.6 months) were included, 81% of which had at least 1 PPC. The mean FAO was 0.12% (95% CI, -1.12 to 1.36). Patients with greater residual malalignment (P < .001) and those with longer follow-up (P < .001) presented with increased TCV. In varus cases, the MCV was greater than the LCV (P = .042), with a threshold FAO value of -2.75% or less predicting an increased MCV. In valgus cases, the LCV was greater than the MCV (P = .049), with a FAO threshold value of 4.5% or more predicting an increased LCV. CONCLUSION: In this series, the PPC volume after primary TAR significantly correlated with postoperative hindfoot malalignment and longer follow-up. LEVEL OF EVIDENCE: Level III, retrospective comparative series.

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Published In

Foot Ankle Int

DOI

EISSN

1944-7876

Publication Date

January 2020

Volume

41

Issue

1

Start / End Page

1 / 9

Location

United States

Related Subject Headings

  • Weight-Bearing
  • Retrospective Studies
  • Postoperative Complications
  • Orthopedics
  • Middle Aged
  • Male
  • Imaging, Three-Dimensional
  • Humans
  • Female
  • Cysts
 

Citation

APA
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ICMJE
MLA
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Lintz, F., Mast, J., Bernasconi, A., Mehdi, N., de Cesar Netto, C., Fernando, C., … Buedts, K. (2020). 3D, Weightbearing Topographical Study of Periprosthetic Cysts and Alignment in Total Ankle Replacement. Foot Ankle Int, 41(1), 1–9. https://doi.org/10.1177/1071100719891411
Lintz, François, Jef Mast, Alessio Bernasconi, Nazim Mehdi, Cesar de Cesar Netto, Céline Fernando, Céline International Weight-Bearing CT Society, and Kristian Buedts. “3D, Weightbearing Topographical Study of Periprosthetic Cysts and Alignment in Total Ankle Replacement.Foot Ankle Int 41, no. 1 (January 2020): 1–9. https://doi.org/10.1177/1071100719891411.
Lintz F, Mast J, Bernasconi A, Mehdi N, de Cesar Netto C, Fernando C, et al. 3D, Weightbearing Topographical Study of Periprosthetic Cysts and Alignment in Total Ankle Replacement. Foot Ankle Int. 2020 Jan;41(1):1–9.
Lintz, François, et al. “3D, Weightbearing Topographical Study of Periprosthetic Cysts and Alignment in Total Ankle Replacement.Foot Ankle Int, vol. 41, no. 1, Jan. 2020, pp. 1–9. Pubmed, doi:10.1177/1071100719891411.
Lintz F, Mast J, Bernasconi A, Mehdi N, de Cesar Netto C, Fernando C, International Weight-Bearing CT Society, Buedts K. 3D, Weightbearing Topographical Study of Periprosthetic Cysts and Alignment in Total Ankle Replacement. Foot Ankle Int. 2020 Jan;41(1):1–9.
Journal cover image

Published In

Foot Ankle Int

DOI

EISSN

1944-7876

Publication Date

January 2020

Volume

41

Issue

1

Start / End Page

1 / 9

Location

United States

Related Subject Headings

  • Weight-Bearing
  • Retrospective Studies
  • Postoperative Complications
  • Orthopedics
  • Middle Aged
  • Male
  • Imaging, Three-Dimensional
  • Humans
  • Female
  • Cysts