缺牙区牙槽骨、黏膜条件较差者，应避免前腭板加后腭杆形式的大连接体。
Anterior palatal plate with posterior palatal bar can not be used on the patient whose alveolar mucosa is not healthy.
结论：颊侧骨板的厚度及缺牙位置均有可能影响术后牙槽嵴的改建。
Conclusion: the thickness of buccal bone wall and position of missing tooth, may influence the maxillary alveolar ridge alterations after immediate implantation.
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