PROBLEM TO BE SOLVED: To restrain stains from adhering to a gargle bowl of a dental diagnostic and treatment apparatus.SOLUTION: A water-repellent chemical agent is applied to a gargle bowl of a dental diagnostic and treatment apparatus, and the gargle bowl coated with the water-repellent chemical is flushed with water. Thus, a water-repellent coating film is formed on a surface of the gargle bowl.【課題】歯科用診療装置のうがい鉢に汚れが付着することを抑制する。【解決手段】歯科用診療装置のうがい鉢に対して、撥水性の薬剤を塗布し、撥水性の薬剤を塗布したうがい鉢に水を流すことで、うがい鉢の表面に撥水性のコーティング膜を形成する。【選択図】図3
