抄録
The term blowout fracture refers to fracture of the orbital floor caused by a sudden increase in the intraorbital pressure. The pressure force applied over the soft tissue contents of the orbit has caused an increase of intraorbital pressure, and the fracture of the thin portion of the floor causes a blowout of the orbital contents into the maxillary sinus. Surgical repair may be necessary when diplopia due to the impairment of ocularotary movement is present. Enophthalmus also necessitates surgical treatment cosmetically. The surgical approaches for this purpose are as follows:
1) trans-maxillary approach
2) trans-orbital approach
3) combined method of 1) and 2)
The trans-maxillary approach is considered to be the most advantageous because the incancerated tissue can be adequately freed by this method and because this approach permits the packing of the maxillary sinus to support the fractured orbital floor, and leaves no visible scar.
Two cases of the blowout fracture are reported. The first case is a 5-year-old boy. The patient was treated by combined method. The second is 31-year-old male and was treated by trans-maxillary approach. The maxillary sinuses of these cases showed high development which is considered to be a important factor of the cause for the blowout fracture.
