Synostosis

A synostosis ( " bone -stick ") is the bony connection ( fusion ) of two bones that were previously connected cartilaginous or fibrous tissue.

Is, however, ossification of the former joint before as end-stage osteoarthritis, or after an infection of a joint injury, this is called ankylosis. Is bony fusion of a former joint result of a fusion surgery, there is an arthrodesis.

A synostosis may be normal in human development, such as the bony connection of the sacral vertebra to the sacrum or the formation of a bone from another merging several ossification centers, such as the three Beck shares the hipbone.

A synostosis may occur rarely between two normally separate bones. This can lead to serious illness, or be an incidental finding of no clinical problems. A synostosis may in utero, such as the cranial sutures - called, or only occur as craniosynostosis during further growth, and occasionally be part of a complex clinical syndrome:

• Radioulnar synostosis with fusion of the spoke little head with the yard basis and the resulting inability to rotate the forearm.
• Radio-humeral synostosis primarily in the context of syndromic malformations.
• Synostosis in the carpal and resultant finger deformities.
• Rückfußsynostosen may exist between the heel bone, the talus, the cuboid bone and the navicular bone and are often only in the prepubertal age by a deformity or pain in the rearfoot striking. They are together often referred to as Tarsal coalition.
• A Kleinzehenendgelenks - synostosis with fusion of the end and the middle phalanx of the fifth digit is relatively common, and is known as asymptomatic incidental finding.
• A synostosis between two vertebrae is called a block vertebrae, and is, if it occurs singly, usually asymptomatic and an incidental finding.
• Synostosis of several cervical vertebrae are very common in the Klippel -Feil syndrome.

An operational solution of synostosis takes place only when clearly to the synostosis back to leading problems, especially with craniosynostosis. Also radioulnar synostosis and those of the hindfoot to be surgically removed usually to improve mobility.

• Joint
• Disease in orthopedic and trauma surgery