What are the characteristics of contact healing?
In contact healing cutting cones are formed at ends of osteons nearest the fracture. Osteoclasts line the spearhead of the cutting cone for bone resorption. Osteoblasts line the rear of the cutting cone for bone formation. Resorption and formation occur simultaneously at 50-80 um/day. Osteonal remodelling occurs across locations of cortical contact of fracture ends. Therefore anatomic reduction with 3600 cortical bone contact is mandatory for primary bone healing by contact healing.