noun
mesial proximal surface
Dental term referring to the surface of a tooth that faces toward the midline and is adjacent to the next tooth.
近心隣接面のう蝕はレントゲンで確認された。
Caries on the mesial proximal surface was confirmed by X-ray.
Compound of 近心 (mesial) + 隣接面 (proximal surface), a technical dental term.