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vickong pun
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活動義齒爲什麽越戴越松？

Posted By vickong pun     July 9, 2021    

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活動義齒爲什麽越戴越松？

　　活動義齒爲什麽越戴越松？隨著義齒使用時間的増加，牙槽骨的吸收，加上基托材料的磨 耗.使基托與黏膜、鄰牙不密合，而造成義齒松動和翹動。可摘式局部義齒經過多次摘戴後，金屬卡環會産生疲勞現象， 彈性變差，容易變形，難以回複到最初與基牙緊密貼合的位置，失 去了卡抱固位作用。

                    

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