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*'''Traumatic''' - normal bone broken by excessive force
*'''Traumatic''' - normal bone broken by excessive force
*'''Pathologic''' - abnormal bone broken by minimal or no trauma
*'''Pathologic''' - abnormal bone broken by minimal or no trauma
**E.g. due to [[Bones Inflammatory - Pathology#Osteomyelitis|osteomyelitis]], [[Bones Hyperplastic and Neoplastic - Pathology#Neoplastic|bone neoplasia]]
**E.g. due to [[Osteomyelitis|osteomyelitis]], [[:Category:Bones - Neoplastic Pathology|bone neoplasia]]
*Early reactive fracture repair may be mistaken for [[Bones Hyperplastic and Neoplastic - Pathology#Osteosarcoma (OSA)|osteosarcoma]] on biopsy
*Early reactive fracture repair may be mistaken for [[Osteosarcoma|osteosarcoma]] on biopsy
===Complications of fracture repair===
===Complications of fracture repair===
*Presence of necrotic bone (may form a sequestrum)
*Presence of necrotic bone (may form a sequestrum)
*Poor alignment
*Poor alignment
*[[Bones Inflammatory - Pathology|Bacterial infection]]
*[[Osteitis|Bacterial infection]]
===Pseudoarthrosis===
===Pseudoarthrosis===
*Composed of fibrous tissue
*Composed of fibrous tissue
*If mobility continues -> hyaline cartilage forms -> neoarthrosis (formation of new joint)
*If mobility continues -> hyaline cartilage forms -> neoarthrosis (formation of new joint)
*In [[Bones Metabolic - Pathology#Secondary hyperparathyroidism|''Osteodystrophia fibrosa'']], [[Bones Metabolic - Pathology#Osteomalacia|osteomalacia]] and [[Bones Metabolic - Pathology#Rickets|rickets]] - callus forms but does not mineralise
*In [[Hyperparathyroidism|''Osteodystrophia fibrosa'']], [[Osteomalacia|osteomalacia]] and [[Rickets|rickets]] - callus forms but does not mineralise
===Head and neck of femur fracture===
===Head and neck of femur fracture===