Table 1.
The Calandra classification
| Grade | Description |
|---|---|
| I | Defect in articular surface that does not affect subchondral bone |
| II | Defect includes subchondral bone |
| III | Large defect in the subchondral bone |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.