Full thickness parietal bone grafts
These grafts are removed with a formal craniotomy and are indicated if long biparietal bone struts across the sagittal sinus or grafts with special curvatures are required.
Burr holes are made with a trephine followed by dural dissection and craniotomies.
The harvested bicortical parietal bone can be split into its two laminae. The inner cortex is used for facial reconstruction while the outer cortex is returned to cover the donor site.