「飯只要吃15分鐘,口腔馬上呈現酸性」,開業牙醫師郭家群表示,特別是尾牙、春節後,民眾大吃大喝,口腔呈現酸性的速度,遠遠超過清潔牙齒的速度,導致每年尾牙、春節期間,急性牙痛的患者增加3成以上。曾有一名男性疏於清潔口腔,食物酸爆了牙齒,某次一咬魚肉,臼齒竟然碎裂,痛到送急診。
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Shan Chia Wu mark this message contains personal perspective
originally written by Shan Chia Wu
口腔的酸鹼值在沒有食物後主要由唾液維持,約為pH值5~8,所以弱酸性也是很正常的。根據一篇2005年的文獻回顧顯示,每日刷牙一次即算足以維持口腔衛生。

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https://www.ncbi.nlm.nih.gov/pubmed/16355646

Tooth brushing and oral health: how frequently and when should tooth brushing be performed? - PubMed

AbstractThis review shows that there is consensus in the literature that (meticulous) tooth brushing once per day is sufficient to maintain oral health and to prevent caries and periodontal diseases.

https://www.ncbi.nlm.nih.gov/pubmed/16355646

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