**5. Conclusions**

Based on the present data of significantly worse clinical score results of TTCA compared to TTA, the fourfold complication rate, and the prolonged downtime and possible permanent incapacity, the indication for a generous subtalar joint arthrodesis with planned ankle arthrodesis should always be critically examined.

**Author Contributions:** Conceptualization, methodology, S.F. and M.M.; writing—original draft preparation, and writing—review and editing, R.S. and S.F.; software, validation, and formal analysis, A.K. and Y.G.; investigation and data curation, R.S. and O.N.; resources and supervision, E.H. and M.M.; project administration, R.H. and S.F. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Institutional Review Board Statement:** All procedures were performed in accordance with the 1964 Helsinki Declaration and its later amendments. This study was approved by the Institutional Review Board of the Hessian Medical Association Germany (2022-2883-evBO, 29 July 2022).

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study. Written informed consent has been obtained from the patients to publish this paper.

**Data Availability Statement:** All data intended for publication are included in the manuscript.

**Acknowledgments:** Sincere thanks are extended to all co-authors for their excellent cooperation. No other grants were received.

**Conflicts of Interest:** The authors declare no conflict of interest.
