Theoretical considerations in rigid fixation of facial bones.

The classic facial fracture patterns have gradually been changing toward more severe comminutions. This necessitates an early and accurate anatomical reduction and a fixation in this position until the fragments have united. Stable fixation favors early mineralization in the fracture gap. The mechanical function of the implants is thus only needed for a short term. Similar considerations are true for the incorporation of grafts. Mechanics of fixation of facial bones is influenced by the structural properties as well.