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1. The dentist cleaned the patient's teeth and removed the gingival crevice.
牙医清理了患者的牙齿，并清除了牙龈沟。
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2. Thepatient had a deep gingivalcrevice that required treatment.
患者有一个深的牙龈沟，需要治疗。
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3. The dentistadvised the patient to floss regularly tomaintain healthy gingival crevices.
牙医建议患者定期刷牙以保持健康的牙龈沟。