Brazilian Experience with Zennith – Corin System Total Ankle Replacement

Abstract

Category:

Ankle Arthritis

Introduction/Purpose:

Total ankle arthroplasty is already a reality in Brazil, although there are few publications of clinical outcomes in our country. The objective of this publication is to evaluate the results of TAA in a series of patients treated with corin system total ankle replacement

Methods:

26 TAA were implanted from Jan / 13 to Aug / 16, (26 patients - 15F: 58% / 11M: 42%) (mean age: 55 years: min 37a / max 69a) using the implants Zennith from Corin (UK). Data from the clinical status (VAS, AOFAS, ADM), implant positioning and osteotomies (LTS, tibial slope, Alpha, Beta and Teta angles and distances ‘a’ and ‘b’) were evaluated in addition to the qualitative bone evolution (Peri-prosthetic cysts, sagging and wear of the components). Immediate and late information of associated surgeries, complications, and re-interventions were collected. Figure 1 present pre and post operative image

Results:

At 31 months of follow-up (min 4m: max 48m), there was a significant improvement in VAS (pre 8: post 2), AOFAS score (pre 37: post 77) and tibio-talar movement arch (pre 12: post 25 ) (P <0.001). There were some complications: 7 (27%) had peri-prosthetic cysts, 3 (12%) talar subsidence, 2 (8%) tibial subsidence and 2 (8%) poly wear. 8 patients (31%) had associated surgeries (19%: malleolar fracture). As major complications: 1 (4%) postoperative infection, 3 (12%) skin complications and 2 failures (8%).

Conclusion:

Despite the high morbidity, total ankle replacement represents a valuable therapeutic resource.