This study is part of the Post-Market Clinical Follow-up process for the Calcanail medical device; the objective of which is to collect data on the safety and performance of the device after it has been placed on the market.

The primary objective of this study is to evaluate the safety of the device. The secondary objectives are to evaluate the clinical performance and safety of the device.

This is a research not involving the human person: observational study, retrospective, monocentric, non-comparative and national.

84 patients will be included in the study.

The CALCANAIL nail is an osteosynthesis nail intended for the repair of articular fractures of the calcaneus, deformities of the hindfoot and arthrosis of the hindfoot. This study aims to answer specific questions about the clinical performance, efficacy or safety of the medical device when used in accordance with its instructions for use. It will also enable us to better detect rare adverse events if necessary, as well as medium-term results.

Inclusion Criteria:

1. Patient operated with the studied device between the 01/01/2012 and 01/01/2020.
2. Patient over 18 years old
3. Patient who has received informed information and does not object to the collection of their data in this study.

Exclusion Criteria:

Patient refusing the use of his data or deceased patient who expressed in writing during his lifetime the non-use of his medical information.

Patient operated with the studied device between the 01/01/2012 and 01/01/2020.