Abstract: Objective:To investigate the clinical effects and features of Medpor in the repairment of orbital blowout fracture(BOF) and compound fracture.Methods:The position and size of orbital fractures in 23 patients were identified using the high resolution CT scan and 3-D reconstruction.The degree of enophthalmos was measured using Hertel exophthalmometer,the diplopia was analyzed using synoptophore,and Medpor was used as the major orbital grafting material.The patients were followed up for 6 to 12 months.Results:Within the following up for more than 6 months,21 cases(95%) were completely corrected among 22 cases with enophthalmos more than 2 mm,12 cases(85%) were completely corrected among 14 cases with diplopia,and 10 cases(90%) recovered normal among 11 cases with movement limitation of eyeball before operation.The differences of the degrees of enophthalmos,movement limitation and deplopia between the postoperative 2 weeks,3 months and 6 months were statistically significant(P<0.05).Conclusions:As a new plastic surgery material,Medpor can be used to repair the orbital fracture,and effectively correct the moderate to severe enophthalmos and diplopia.