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. 2015 Dec 10;2015:842518. doi: 10.1155/2015/842518

Figure 6.

Figure 6

A custom made hollow trocar was advanced from the periorbital region subperiosteally to the retroauricular area. The cone end of the trocar was removed and the sensitive implant chip was placed inside the trocar tube. Retracting the trocar with the implant chip allowed safe passage of the subperiosteal tunnel.