Abstract
Introduction
Peri prosthetic fracture is a recognised complication following Total ankle arthroplasty (TAA). There is limited literature on post operative management following TAA and controversies exist based on surgeon preferences. This project reports the incidence of peri- prosthetic fractures in patients managed with 2 different post-operative protocols.
Materials and Methods
Patients undergoing primary TAA with a diagnosis of Osteoarthritis (OA) or Post-traumatic Osteoarthritis (PTOA) were recruited into a randomized controlled trial. These patients did not require any additional procedures.
Patients were consented for the trial and randomized to one of two treatment groups (Early mobilisation after surgery vs. immobilisation in a plaster cast for 6 weeks post operatively). Plaster group patients underwent a graduated physiotherapy program from 6-12 weeks and early mobilisation group patients from 1-12 weeks. Complications any were recorded at 2, 4, 6 and 12 weeks post-operatively.
Results
A total of 16 ankle replacements were done for a diagnosis of OA (10) and PTOA (6). Mean age was 58 years (±11.75) for the plaster group and 64 years (± 9.32) for the early mobilisation group. 7 patients were randomized to the plaster group and 9 patients were randomized to the early mobilisation group.
Of the plaster group 1 patient sustained an intra-operative fracture tibia and 2 patients reported with a fractured medial malleolus. Of the early mobilisation group, 1 patient reported with a peri prosthetic fracture tibia at 6 weeks and 3 patients reported a fractured medial malleolus at 3 months follow up.
The percentage of fracture incidence between plaster versus early immobilisation group was 42.8% and 44.4 % respectively
Conclusions
These early results demonstrate no significant differences in the incidence of fracture rates between groups. Further studies of post-operative management are needed to study the correlation with peri-prosthetic fracture rates after TAA
