Fu S, Yang K, Li X, Chen C, Mei G, Su Y, Xue J, Zou J, Zhang J, Shi Z. Radiographic and Clinical Outcomes After Arthroscopic Microfracture for Osteochondral Lesions of the Talus: 5-Year Results in 355 Consecutive Ankles.
Orthop J Sports Med 2022;
10:23259671221128772. [PMID:
36263313 PMCID:
PMC9575450 DOI:
10.1177/23259671221128772]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 08/02/2022] [Indexed: 11/18/2022] Open
Abstract
Background:
Arthroscopic microfracture for osteochondral lesion of the talus (OLT) has
shown good functional outcomes in the short and long term.
Purpose:
To investigate 5-year radiographic and clinical outcomes after arthroscopic
microfracture in treatment of OLT and the effectiveness of adjunct therapies
including platelet-rich plasma (PRP) and hyaluronic acid (HA).
Study Design:
Cohort study; Level of evidence, 2.
Methods:
We prospectively enrolled 432 patients who underwent arthroscopic
microfracture for OLT from May 1, 2011, to May 31, 2015. Magnetic resonance
imaging (MRI) and weightbearing radiographs were performed annually after
the initial surgery. The MOCART (magnetic resonance observation of cartilage
repair tissue) score was used to evaluate the structure of the repaired
cartilage on MRI, and patient-reported outcomes (American Orthopaedic Foot
and Ankle Society ankle-hindfoot scale [AOFAS] and the Foot and Ankle
Outcome Score) were collected annually. The primary outcome measure was
5-year AOFAS score. We recorded baseline characteristics including age, body
mass index (BMI), and lesion size, and other potentially related factors
including number of PRP/HA injection and change in BMI from baseline.
Results:
Included were 355 patients, all with minimum 5-year follow-up data. The
overall reoperation rate was 9.0% (32 of 355). According to multivariable
analysis, 5-year AOFAS scores were associated with number of PRP injections
(correlation coefficient, 3.12 [95% CI, 2.36 to 3.89]; P
< .001), BMI at baseline (correlation coefficient, -0.222 [95% CI, -0.363
to -0.082]; P = .002), and mean BMI change from baseline
(correlation coefficient, -1.15 [95% CI, -1.32 to -0.98]; P
< .001). When comparing number of PRP injections (0, 1-2, or ≥3), we
found that patients who had serial PRP injection (≥3 with at least a 3-month
interval between injections) had diminished functional and radiographic
deterioration over time.
Conclusion:
Arthroscopic microfracture improved patient-reported and structural outcomes
for patients with OLT at 5 years after surgery. Serial PRP injections and
reduction in BMI from baseline were able to slow radiographic and functional
deterioration. Future trials regarding the combination of microfracture and
PRP in treatment of OLT should focus on the efficacy of longer term,
intra-articular, serial injections of PRP instead of single injections.
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