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CT arthrography visualizes tissue growth of osteochondral defects of the talus after microfracture

  • Ankle
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Little is known about the arthroscopic or radiographic outcomes after arthroscopic microfracture of osteochondral lesions of the talus (OLTs). The purpose of this study was to investigate tissue growth after arthroscopic microfracture of OLTs using computed tomography arthrography (CTA) and to identify the relationship between CTA findings and clinical outcomes. We hypothesized that the morphology of the repaired tissue would be similar to that of normal anatomy and correlate with the clinical outcomes.

Methods

Forty-two ankles treated using arthroscopic microfracture of OLTs between 2009 and 2014 were monitored. CTA was performed post-operatively at 6 months and at 1 and 2 years after surgery. The post-operative thickness of the repaired tissue associated with OLT (grade) and the volume of the subchondral cystic lesions were evaluated using CTA. Clinical outcomes, including the pain visual analog scale (VAS) and American Orthopaedic Foot and Ankle Society (AOFAS) ankle functional scores, were evaluated and correlated with CTA.

Results

The proportion of fully grown tissue (grade 3) increased over time; specifically, the rates were 12/40 (33.3%) at 6 months, 11/18 (61.1%) at 1 year, and 8/10 (80%) at 2 years after surgery (p = 0.005). The VAS pain (p < 0.001) and AOFAS scores (p < 0.001) were also improved at the final follow-up; however, they were not associated with repaired tissue thickness as shown by CTA (n.s.).

Conclusions

After microfracture of OLTs, tissue growth in the osteochondral defects was well visualized using CT arthrography and was observed in most cases. However, the CTA findings were not related to the clinical outcomes.

Level of evidence

IV.

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Authors and Affiliations

  1. Department of Orthopedic Surgery, Konkuk University School of Medicine, 4-12 Hwayang-dong, Gwangjin-gu, Seoul, 143-729, Republic of Korea

    Hong-Geun Jung, Jun-Sang Eom, Jong-Soo Lee & Sung-Wook Kim

  2. Department of Radiology, Konkuk University School of Medicine, 4-12 Hwayang-dong, Gwangjin-gu, Seoul, 143-729, Republic of Korea

    Na-Ra Kim

  3. Department of Radiology, Gachon University, Gil Medical Center 21, Namdong-daero 774 beon-gil, Namdong-gu, Incheon, 21565, Republic of Korea

    Ji-Young Jeon

  4. Department of Orthopaedic Surgery, Myongji Hospital, 697-24 Hwajung-dong, Deokyang-gu, Goyang-si, Gyeonggi-do, 412-270, Republic of Korea

    Dong-Oh Lee

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  1. Hong-Geun Jung
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Correspondence to Dong-Oh Lee.

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Conflict of interest

The authors declare that they have no competing interests.

Funding

The project was supported by Konkuk University.

Ethical approval

This study was approved by institutional review board at Konkuk Medical Center (KUH1060110).

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Patients gave written informed consent.

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Jung, HG., Kim, NR., Jeon, JY. et al. CT arthrography visualizes tissue growth of osteochondral defects of the talus after microfracture. Knee Surg Sports Traumatol Arthrosc 26, 2123–2130 (2018). https://doi.org/10.1007/s00167-017-4610-y

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  • DOI: https://doi.org/10.1007/s00167-017-4610-y

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