Total ankle replacement versus ankle arthrodesis for patients aged 50-85 years with end-stage ankle osteoarthritis: the TARVA RCT

Sports Activity with Ankle Osteoarthritis and Total Ankle Arthroplasty

Background/Objectives: The interest in performing total ankle arthroplasty (TAA) to address end-stage ankle osteoarthritis (OA) is continuously growing. Sports activity plays an important role in our world. The literature is sparse regarding return-to-sports activity following TAA. The levels and types of sports in TAA are rarely reported. The purpose of this prospective case series study is to investigate sports activity in ankle osteoarthritis (OA) and TAA in terms of rate, frequency, type, and clinical outcomes with a minimum 2 years of follow-up after surgery. Methods: A total of 103 patients (105 implants, 52 female, and 51 male), mean age 60.5 years (range, 23-84 years) with end-stage ankle OA were treated using a three-component, uncemented, mobile-bearing VANTAGE Total Ankle System. The mean follow-up was 2.9 years (range, 2-5 years). Visual Analogic Scale Pain Score (VAS, 0-10 points), Ankle Dorsiflexion/Plantarflexion (DF/PF) range of motion (ROM; degrees), functional American Orthopaedic Foot and Ankle Society (AOFAS) Ankle/Hindfoot Score (0-100 points), Subjective Patients' Satisfaction Score (0-10 points), Sports Activity Rate, Sports Frequency Score, and sports type were assessed. Results: The mean preoperative VAS Pain Score was 6.7 points (range, 3-10 points) and 0.2 points for postoperative (range, 0-3 points) (p < 0.001). The mean DF/PF ROM was 24.9° preoperative (range, 0-60°) and 52.9° postoperative (range, 15-85°) (p < 0.001). The mean preoperative functional AOFAS Ankle/Hindfoot Score was 39.5 points (range, 4-57 points) and 97.8 points for postoperative (range, 75-100 points) (p < 0.001). The mean postoperative Subjective Patients' Satisfaction Score was 9.7 points (range, 7-10 points). The preoperative Sports Activity Rate was 31.1%, with 85.4% for postoperative (p < 0.001). All the groups exhibited substantial Sports Frequency Score increases (p < 0.001). The most practised sports were hiking, biking, fitness, and swimming. Conclusions: total ankle arthroplasty (TAA) is an effective treatment for end-stage ankle OA. TAA facilitates a noteworthy increase in sports activity. This research offers important sports insights to patients with ankle OA and TAA.

Long-term Outcomes After Total Ankle Arthroplasty: A Systematic Review

Background

Total ankle arthroplasty has emerged as a treatment to successfully treat ankle arthritis. Recent studies have reported more than 40 000 total ankle arthroplasties (TAAs) being performed between 2009 and 2019 in the United States. Although recent studies have reported favorable patient-reported outcomes at short- and midterm follow-up, there is a paucity of aggregate literature reporting on long-term patient-reported outcomes (PROs) after TAA. The purpose of this review is to report an aggregate of literature on minimum 10-year patient-reported outcomes after TAA.

Methods

A systematic review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. PubMed, Scopus, and Cochrane Central Register of Controlled Trials (CENTRAL) were queried in June 2024. Primary research articles were included if they reported minimum 10-year PROs or satisfaction for patients who underwent primary TAA and were written in English. Survivorship was reported based on implant failure, which was determined uniquely by each study.

Results

Eight studies met the inclusion criteria. A total of 595 ankles with a range of average ages from 51 to 73.7 years were included in the study with follow-up ranging from a minimum of 10 years to a minimum of 20 years. Six of the 8 studies reported average follow-up ranging from 11.9 to 15.8 years. Two of the 8 studies reported significant improvement in PROs following surgery. Survivorship at a minimum of 10-year follow-up ranged from 66% to 94.4%. Average time to implant failure ranged from 4.6 to 13.8 years.

Conclusion

Patients undergoing primary TAA were reported to have generally improved PROs at minimum 10- year follow-up. However, they demonstrated variable rates of survivorship ranging from 66% to 94.4%. Of those experiencing implant failure, average time to failure ranged from 4.6 to 13.8 years. Survivorship should be interpreted with caution because of varying definitions between studies. Further studies should seek to standardize the definition of survivorship and reporting of PROs to allow for effective analysis of heterogeneity.

Artificial Intelligence Language Models Are Useful Tools for Patients Undergoing Total Ankle Replacement

Background

Artificial intelligence (AI) large language models (LLMs), such as Chat Generative Pre-trained Transformer (ChatGPT), have gained traction as both augmentative tools in patient care but also as powerful synthesizing machines. The use of ChatGPT in orthopaedic foot and ankle surgery, particularly as an informative resource for patients, has not been described to date. The purpose of this study was to assess the quality of information provided by ChatGPT in response to commonly asked questions about total ankle replacement (TAR).

Methods

ChatGPT was asked 10 frequently asked questions about TAR in a conversational thread. Responses were recorded without follow-up, and subsequently graded A, B, C, or F, corresponding with “excellent response,” “adequate response needing mild clarification,” “inadequate response needing moderate clarification,” and “poor response needing severe clarification.”

Results

Of the 10 responses, 2 were grade “A,” 6 were grade “B,” 2 were grade “C,” and none were grade “F.” Overall, the LLM provided good-quality responses to the posed prompts. Conclusion. Overall, the provided responses were understandable and representative of the current literature surrounding TAR. This study highlights the potential role LLMs in augmenting patient understanding of foot and ankle operative procedures.

Levels of Evidence:

IV.

Obesity and Ankle Prosthesis Revision: A Systematic Review and Meta-analysis

BACKGROUND

The increasing number of total ankle arthroplasties (TAAs) has led to growing evidence on the risk factors for complications after surgery. However, the role of obesity in this patient group has been the subject of much debate. Therefore, this systematic review aimed to investigate the evidence for untoward effects of obesity following TAA.

METHODS

We conducted a comprehensive search on April 28, 2023, in MEDLINE (via PubMed), Embase, and CENTRAL. Eligible observational studies reported on the short- and long-term outcomes of primary TAA, comparing patients with and without obesity (defined as body mass index > 30). Using a random effects model, we calculated pooled odds ratios (ORs) with 95% confidence intervals (CIs) from 2 by 2 tables (event and nonevent in the obese and nonobese primary TAA groups).

RESULTS

Nine studies with 10 388 patients were eligible for inclusion in the meta-analysis. We found significantly higher odds of revision in the obese group compared to the nonobese group (OR = 1.68, CI: 1.44-1.95). However, the odds of overall perioperative complications (OR = 1.55, CI: 0.50-4.80) and wound complications (OR = 1.34, CI: 0.29-6.20) were nonsignificantly higher in the obese group.

CONCLUSION

Based on our results, obesity may have affected long-term outcomes following TAA and may have negatively affected the prosthesis's survival.

[Ankle arthritis: joint-preserving surgery and total ankle arthroplasty]

Ankle arthritis affects approximately 1% of the adult population worldwide and represents a serious global disease burden. However, compared with hip arthritis and knee arthritis, the clinical understanding and treatment of ankle arthritis are still in their infancy. For end-stage ankle arthritis, ankle arthrodesis was considered as the "gold standard" in the past. However, ankle arthrodesis will result in loss of joint mobility, altered gait, limited daily activities, and accelerated degeneration of adjacent joints. Therefore, how to preserve the range of motion of the ankle joint while relieving pain is the key to the treatment of ankle arthritis. Currently, the surgical treatment of ankle arthritis includes arthroscopic debridement, periarticular osteotomies, osteochondral transplantation, ankle distraction arthroplasty, ankle arthrodesis, and total ankle arthroplasty. The choice of treatment should be individualized and based on various factors such as the patient's symptoms, signs, imaging performance, complaints, and financial situation. However, there are no guidelines that give clear treatment recommendations. Therefore, it is necessary to conduct extensive and in-depth discussions on the diagnosis and treatment of ankle arthritis.

Risk Factors for Failure of Total Ankle Replacements: A Data Linkage Study Using the National Joint Registry and NHS Digital

BACKGROUND

Despite the increasing numbers of ankle replacements, there remains debate about which patients should undergo an ankle replacement, and there are limited studies analyzing risk factors for failure of an ankle replacement. The primary aim of this study is to analyze the risk factors for failure of total ankle replacements.

METHODS

A data linkage study combining the National Joint Registry (NJR) Data and NHS (National Health Service) Digital data was performed. The primary outcome of failure is defined as the removal or exchange of any components of the implanted device. Kaplan-Meier survival charts were used to illustrate survivorship. Multivariable Cox proportional hazards regression models were fitted to analyze potential risk factors for failures or ankle replacements.

RESULTS

The overall 5-year survival was 90.2% (95% CI 89.2%-91.1%). In multivariable (adjusted) Cox regression models, only age (hazard ratio [HR] 0.96, 95% CI 0.94-0.97), body mass index (BMI; HR 1.03, 95% CI 1.01-1.06), and underlying etiology (HR 0.88, 95% CI 0.80-0.97) were associated with an increased risk of failure.

CONCLUSION

This study demonstrates that younger patients and those with an increased BMI have an increased risk of failure of a primary ankle replacement. We also show that rheumatoid patients have higher survivorship than those with osteoarthritis.

LEVEL OF EVIDENCE

Level III, retrospective cohort study.