AIM: To investigate the operation time, effect and complication of transconjunctival approaches for orbital blowout fractures Medpor reconstruction.

METHODS: Twenty-one patients with orbital blowout fractures were performed transconjunctival approaches for orbital blowout fractures Medpor reconstruction from 2010 to 2014. All the patients were divided into the early operation group(12 cases)and the late operation group(9 cases)based on the treatment time and followed up for 3～12mo. The diplopia, exophthalmos, sensory disturbance degree of infraorbital nerve and complications, effectives of the operation were analyzed and compared.

RESULTS: The cure rate of diplopia was 76.2%(16/21), 83.3%(10/12)in the early operation group and 66.7%(6/9)in the late operation group with statistical difference(P<0.05). The cure rate of enophthalmos was 81.0%(17/21), 83.3%(10/12)and 77.8%(7/9)in the early and later operation group, without statistical difference(P>0.05).T the cure rate of sensory disturbance degree of infraorbital nerve was 57.1%(12/21), 58.3%(7/12)vs 55.6%(5/9)(P>0.05). No operation complications were observed.

CONCLUSION: Medpor reconstruction with transconjunctival approaches is safe, simple and reliable for patients with orbital blowout fractures. Early operation treatment should be performed in two weeks when conservative treatment was not useful.