inflammation of the periodontal tissues (gums and supporting bone) caused by bacterial infection; if it progresses, teeth can become loose and may be lost.
定期検診で軽い歯周炎が見つかったので、クリーニングを受けた。
They found mild periodontitis at the regular check-up, so I had a cleaning.
歯周炎が進行すると歯茎が下がり、歯がぐらついてくる。
If periodontitis progresses, the gums recede and the teeth become loose.
毎日の歯磨きと歯石除去で歯周炎を予防できる。
You can prevent periodontitis with daily brushing and tartar removal.