Biological Foundation: Distraction Regenerate
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Distraction osteogenesis begins with the development of a reparative callus. The callus is placed under tension by stretching, which generates new bone. As was previously alluded to, distraction osteogenesis consists of four sequential periods: 1) osteotomy, 2) latency (from bone division to the onset of traction), 3) distraction (time when gradual traction is applied and distraction regenerate is formed), and 4) consolidation (allows maturation and corticalization of the regenerate after traction forces are discontinued).

FIG. 4.1.1-4.1.4. Schematic drawings demonstrating 4 sequential periods of distraction osteogenesis: osteotomy (left), latency (center left), distraction (center right), and consolidation (right).

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