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Frequently Asked Questions

What kind of prosthesis are you working with?
For primary resection, we use anatomical, unguided, uncemented 3-component-prostheses of the newest generation. Only in individual cases (instabilities) we will use partly-guided (translatory/rotatory guided) special endoprosthesis. If extensive changes of the bone structure are needed, a custom prosthesis can be created. These prostheses are specifically developed for the patient. A decision on the type of prosthesis will be made based on clinical and radiological diagnostics.
How often do you perform TAA/TAR surgery?
Dr. Boack has conducted over 1,200 ankle endoprosthesis implants, making him one of the most experienced surgeons worldwide in this field. Patients enjoy the benefits of focused expertise, with all TAA/TAR surgeries coming “from one hand.”
What if the prosthesis loosens prematurely?
Literature quotes “success rates” of 95% after 12 years, even for older prostheses, which equates to a loosening rate of 0.5% per year (and is therefore comparable to knee and hip prostheses). Multi-center analysis also showed a revision rate of 1% per year (meaning 90% of patients are still able to comfortably walk without renewing the endoprosthesis after 10 years). Surveys among our patients show that they remain content with their endoprosthesis after 20 years. Even if the prosthesis loosens, it is possible to replace parts of it while preserving functionality. At the patient's request, we can also conduct facet fusion in such cases.
How soon after surgery can I go back to driving?
During the first six weeks, you should adhere to partial weight-bearing as the uncemented prosthesis has to first fuse with the bone. We therefore recommend waiting six weeks before driving.
How soon after the surgery can I put full weight on the leg/foot?
As the prosthesis is uncemented, you should adhere to partial weight-bearing during the first six weeks to help the components’ healing process. We therefore recommend waiting six weeks before bearing the full weight again.
How long do I have to stay in hospital?
The inpatient stay typically lasts five to eight days, with the duration depends on undisturbed primary wound repair, accompanying diseases, the patient’s age, and the operational procedures.
Is rehabilitation treatment necessary after surgery?
A subsequent inpatient healing-treatment is generally not needed. Most patients follow up with outpatient physiotherapy near their home. If requested, our social commissioner can order a course of treatment for insured patients, provided requirements are met.
What are the risks?
The risk of complications depends on the blood perfusion, soft tissue condition (scarring, wounds), comorbidities (diabetes mellitus), personal lifestyle (smoking), and existing deformities. Due to a large number of influencing factors, an individual risk profile has to be based on clinical and radiological examination. In general, literature quotes infection rates of 2-7% for such interventions. The complication and infection rate is less than one percent due to careful analysis and our vast experience in the field of ankle arthroplasty.
Does my insurance cover the costs of surgery?

Legal Notice: We will gladly answer any additional questions. Please be informed that the above answers are subject to changes.