刷牙要注意手勢與力度 要確保口腔清潔，必須掌握正確的刷牙方法。牙科醫生李肖竹表示，Bass Brushing Technique 是目前被認為最有效的刷牙方法。由於牙菌膜多數會隱藏於牙齒與牙齦之間的牙齦溝，若沒有好好清潔，很易造成牙周病，而 Bass Brushing Technique 的關鍵在於牙刷擺放的位置，牙刷頭以45度水平傾斜擺放在牙齒與牙齦之間，繼而在同一位置輕輕打圈 20 次，正正有助清除牙菌膜。 刷牙時間的長短，則視乎潔齒工具而定。如果選用電動牙刷，因產品已預設自行打圈的動作，只須把牙刷放在每隻牙齒與牙齦之間停留約 2 秒便可，所以每次刷牙只需約2分鐘。如果選用手動牙刷則較費時，每次刷牙的理想時間應為3至5分鐘。至於刷牙時間太長，會否磨損珐琅質？李醫生解釋：「如果以輕力按摩的手勢刷牙，我不擔心時間問題。相反，長時間太過用力刷牙，或會令牙齦萎縮，更會刷蝕牙腳位置的珐琅質，令該處形成一個凹位，最終可導致牙齒敏感、牙髓發炎等問題。如果牙刷刷毛出現開叉情況，代表刷牙力度過大。」 清理牙縫不能單靠牙刷 護齒用具眾多，應如何選擇？使用時，又要注意甚麼？李醫生表示，一般情況下，選用含氟成分的牙膏便可；患有敏感牙齒的人士，則可選擇敏感配方。美白牙膏方面，大部分含有較粗的顆粒成分，藉此磨掉牙齒表面的牙垢，但如果發黃原因與牙垢無關，而是緣於牙齒本身的問題，可考慮使用含 Carbamide peroxide 成分的美白牙膏。值得一提，使用美白牙膏的成效因人而異，美白作用亦很有限。 此外，單靠牙刷、牙膏，未必可徹底清潔牙齒，尤其是積聚於牙縫之間的牙垢、食物殘渣等，所以有必要用上牙線或牙
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