For several reasons, a<unk>  may not unite. The diaphyseal bone (zone II), where the fracture occurs, is an area of potentially poor blood supply, existing in a watershed area between two blood supplies. This may compromise healing. In addition, there are various tendons, including the fibularis brevis and fibularis tertius, and two small muscles attached to the bone. These may pull the fracture apart and prevent healing.<unk>  I and III have been associated with relatively guaranteed union and this union has taken place with only limited restriction of activity combined with early immobilization. On the other hand, zone II has been associated with either delayed or non-union and, consequently, it has been generally agreed that fractures in this area should be considered for some form of internal immobilization, such as internal screw fixation. These<unk>  can be identified anatomically and on x-ray adding to the clinical usefulness of this classification. Surgical intervention is not, by itself, a guarantee of cure and has its own complication rate. Other reviews of the literature have concluded that conservative, non-operative, treatment is an acceptable option for the non-athlete. Image:Gray288.Anatomy of the fifth metatarsal. Image:Jones fracture, healing<unk>  according to Polzer.3 zone description Image:Jones fracture, healing<unk>  according to Polzer 2.2 zone description
Jones fracture
Epiphyseal plate
Smith fracture
Avulsion fracture
March fracture
Bosworth fracture
Jefferson fracture
Rolando fracture