Multidirectional cranial distraction osteogenesis technique for treating bicoronal synostosis.

Fronto-orbital advancement by distraction osteogenesis is a useful means of surgically correcting bicoronal synostosis. However, the scope for morphological revision is limited. To address this issue, we developed a multidirectional cranial distraction osteogenesis (MCDO) technique that we quantitatively assessed in patients with bicoronal synostosis. In this case series, five patients with bicoronal synostosis were treated with MCDO at a mean age of 13.4 months (range 9-22 months). Distraction started 5 days after surgery and the activation period was 11.2 days (range 10-14 days). The distraction devices were removed 47.2 days (range 33-67 days) after completing distraction. Improved cranial shape was confirmed by CT data. Mean preoperative CI, APL, and ICV readings of 102.1%, 13.5 cm, and 1179.4 ml, respectively, had reached 94.0%, 14.9 cm, and 1323.9 ml, respectively, upon device removal. These values were well preserved at 1 year (90.4%, 15.8 cm, and 1461.3 ml, respectively). In conclusion, MCDO successfully enables both cranial expansion and correction of a flat forehead, constituting a valid treatment alternative for patients with bicoronal synostosis.