歯周 ししゅう治療 ちりょう がくじゃなかったです
shishūchiryōgakujanakattadesu

Noun
Desu Copula

The polite, past negative form of 歯周治療学

1. Wasn't periodontology.; Wasn't periodontal treatment studies.

Past/Perfective
Negative
Polite
Casual Register