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.
Restorable remaining tooth structure: modes I, II and IV; non-restorable remaining tooth structure: modes III and V.
| Mode of failure | I | II | III | IV | V |
|---|---|---|---|---|---|
| Descriptive form | Crack limited to
occlusal half. |
Crack extended
to cervical half. |
Crack extended
through and beyond cervical finish line. |
Fractured
segment of coronal part of tooth. |
Fractured
segment of coronal part and root of the tooth. |
|
Descriptive
Stereomicroscopic photo |
|
|
|
|
|
