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Purpose: To report a case of fixed prosthesis with autologous ilium bone free graft auxiliary GBR to restore severe defects of maxillary.Method: Basic situation: patient,masculinity,67 years old,Clinical time: 2013-2.Severe defect of maxillary including the area of 16 to 21 on account of car accident 15 years ago,the height of alveolar crest to vestibular groove less than 5mm,CBCT show that the width of buccolingual is 0.3-1.6mm and the horizontal defect is to 1/3 of root apex in defects of bone area.The range of opening mouth is 3.5cm.The patient required strongly to restore the defect by fixed prosthesis which supported by implant.