上颌骨因缺损或肿瘤手术切除后，因缺损范围较大，以至面部塌陷，既影响美观又降低了咀嚼功能。中空式阻塞器呈全封闭，故发音清晰，口腔卫生良好，重量轻，戴用舒适。因此上颌骨切除后的患者需做中空武阻塞器，以便减轻重量，利于固位。传统的中空阻塞器的制作是在中空处填人 Due to the defect of the maxilla or tumor resection, the scope of the defect is large and the face collapses, which not only affects the appearance but also reduces the masticatory function. Hollow occluder was completely closed, it articulates clear, good oral hygiene, light weight, wearing comfort. Therefore, patients after maxillary resection need to do hollow martial obstruction, in order to reduce weight, help retention. The traditional hollow occluder is filled in the hollow