Clin Orthop Surg.  2018 Jun;10(2):181-190. 10.4055/cios.2018.10.2.181.

Prevalence and Predictors of Patellofemoral Osteoarthritis after Anterior Cruciate Ligament Reconstruction with Hamstring Tendon Autograft

• Lee DW
• Yeom CH
• Kim DH
• Kim TM
• Kim JG

• KMID: 2411743
• DOI: http://doi.org/10.4055/cios.2018.10.2.181

Abstract

BACKGROUND
The present study aimed to evaluate the prevalence of patellofemoral osteoarthritis (PFOA) and identify the factors that affect PFOA development after single-bundle anterior cruciate ligament (ACL) reconstruction with hamstring autograft. We hypothesized that detecting these factors could be helpful in establishment of a rehabilitation strategy to focus on the modifiable factors.
METHODS
Of the 324 patients who underwent primary ACL reconstruction between January 2010 and June 2013, 92 patients who were available for follow-up for a minimum of 36 months after the surgery and underwent second-look arthroscopy were enrolled. Subjective assessments and clinical outcome evaluation were conducted. Arthroscopic cartilage evaluation was done using the Outerbridge classification. Univariable and multivariable logistic regression analyses were used.
RESULTS
Ninety-two patients were evaluated at an average of 38.9 ± 5.4 months of follow-up. PFOA above grade 2 was observed in 19 patients (20.7%) at the second-look arthroscopy. Of them, three patients with pre-existing PFOA (3.3%) showed progression of the Outerbridge grade, and 16 (17.4%) had newly developed PFOA. According to the multivariable logistic regression analysis, isokinetic extensor deficit at 60°/sec at the last follow-up (odds ratio [OR], 2.193; 95% confidence interval [CI], 1.081 to 12.439; p = 0.031), age at primary surgery (OR, 1.118; 95% CI, 1.019 to 1.227; p = 0.018), and concurrent meniscectomy at primary surgery (OR, 0.091; 95% CI, 1.012 to 1.177; p = 0.023) were the significant predictors of PFOA development.
CONCLUSIONS
Significant predictors of PFOA after ACL reconstruction with hamstring autograft were decreased quadriceps strength at last follow-up, increased age, and concurrent meniscectomy at primary surgery. Quadriceps weakness as a modifiable factor should be considered in the establishment of a rehabilitation strategy to prevent PFOA after ACL reconstruction, especially in older age.

Keyword

Anterior cruciate ligament reconstruction; Patellofemoral osteoarthritis; Meniscectomy; Knee extension; Risk factors

MeSH Terms

Anterior Cruciate Ligament Reconstruction*
Anterior Cruciate Ligament*
Arthroscopy
Autografts*
Cartilage
Classification
Follow-Up Studies
Humans
Logistic Models
Osteoarthritis*
Prevalence*
Rehabilitation
Risk Factors
Tendons*

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