upper teeth
Refers to the teeth in the upper jaw. Common in everyday contexts, such as dental care or descriptions of the mouth.
上歯を磨くときは、歯ブラシを斜めに当ててください。
When brushing your upper teeth, hold the toothbrush at an angle.
Compound of 上 (うわ, upper) and 歯 (は, tooth), with rendaku voicing of は to ば.