Complication Rates and Outcomes After TKA in Post-Traumatic Osteoarthritis

Overview

This systematic review compares total knee arthroplasty (TKA) outcomes in patients with post-traumatic osteoarthritis (PTOA) following fracture interventions to those with primary osteoarthritis (OA). Findings indicate that TKA in PTOA patients is associated with inferior patient-reported outcomes and higher complication rates compared to primary OA cases.

Background

Total knee arthroplasty is a common and effective treatment for osteoarthritis, providing pain relief and functional improvement. Knee injuries significantly increase the risk of developing osteoarthritis, termed post-traumatic osteoarthritis when related to prior trauma. Performing TKA in PTOA patients, especially after fracture management around the knee, is more technically challenging and may lead to different outcomes compared to primary OA. Previous reviews have not comprehensively compared these groups, prompting this systematic review to evaluate PROMs and complication rates in these populations.

Data Highlights

The review included studies published between 2000 and 2022, assessing adult patients undergoing TKA for PTOA after fracture treatment versus primary OA. Methodological quality was moderate overall, with CASP scores averaging 23.6 out of 28. The included studies comprised randomized controlled trials, prospective and retrospective comparative cohorts, and registry studies. Outcomes focused on patient-reported outcome measures and complication rates, with a total of 18 studies meeting inclusion criteria.

Key Findings

• TKA in patients with PTOA due to prior fracture interventions results in worse patient-reported outcome measures compared to TKA performed for primary OA.
• Complication rates, including intra- and postoperative events, are higher in the PTOA group than in primary OA patients undergoing TKA.
• The technical complexity of TKA increases in PTOA cases, likely contributing to inferior outcomes.
• Most included studies were of moderate methodological quality, supporting the reliability of these findings.
• Previous reviews lacked comprehensive comparison between PTOA and primary OA, which this review addresses by including a broader range of fracture types around the knee.

Clinical Implications

Clinicians should anticipate higher complication risks and potentially less favorable patient-reported outcomes when performing TKA in patients with PTOA following fracture management. Preoperative counseling and surgical planning should account for the increased technical demands and possible inferior results in this population. Enhanced perioperative strategies may be warranted to mitigate complications and optimize outcomes.

Conclusion

Total knee arthroplasty in patients with post-traumatic osteoarthritis secondary to prior fracture interventions is associated with deteriorated patient-reported outcomes and increased complication rates compared to primary osteoarthritis. These findings highlight the need for tailored clinical approaches in this challenging subgroup.

References

1. Systematic Review Authors/2023 -- Complication Rates and Patient-Reported Outcomes Deteriorate After Total Knee Arthroplasty in Cases of Post-Traumatic Osteoarthritis with Prior Fracture Interventions