noun
Dental term referring to the vertical overlap of the upper front teeth over the lower front teeth.
歯科検診で上噛合わせが深いと言われた。
At the dental checkup, I was told I have a deep overbite.
Colloquial term for protruding front teeth, which may involve an overbite but focuses on horizontal protrusion rather than vertical overlap.
Compound of 上 (うわ, 'upper') + 噛み合わせ (かみあわせ, 'bite, occlusion'). The exact historical derivation is uncertain, but the term transparently describes the meeting of the upper and lower teeth.