Also found in: Dictionary, Medical, Wikipedia.



fastening of the ends of fragmented bone after osteotomy and in the treatment of fractures in order to realign and secure the fragments in a position that would promote callus formation. Osteosynthesis can be closed, involving the fixation of bone fragments by mechanical means: wires are passed through the fragments at some distance from the line of fracture and held in repositioning devices, such as rings and arches. With open osteosynthesis, the fragments are secured with metal or plastic devices that are introduced into the canals of tubular bones; plates can be screwed to the cortical layers of the bone. Osteosynthesis can be performed in one of several stages, but the operation must be closed if several stages are involved. It can also be performed with bone grafts: autografts use bone taken from the patient himself; homografts—from preserved cadaver tissues; and heterografts—from an animal of another species.

Osteosynthesis can be stable or unstable. The former ensures the reliable fixation of fragments in apposition and does not require additional external fixation with a cast or some other means. Unstable osteosynthesis requires additional external fixation until the fragments are joined. Compression osteosynthesis—a special kind of osteosynthesis involving compression of the fragments along the bone axis—has no clear advantage over the ordinary types of osteosynthesis inasmuch as the fragments do not join faster and the quality of the union is not better.

Osteosynthesis is performed under local or general anesthesia in specialized medical institutions. During wartime, osteosynthesis can only be done in a specialized field hospital.


Chaklin, V. D. Osnovy operativnoi ortopedii i travmatologii. Moscow, 1964.
Dubrov, la. G. Vnutrikostnaia fiksatsiia metallicheskim sterzhnem pri perelomakh dlinnykh trubchatykh kostei, 2nd ed. Moscow, 1972.


References in periodicals archive ?
Browse Market Research Report on Osteosynthesis Devices Market: http://www.
This technique is the link between the 3D model of the anatomical part and the osteosynthesis implant's 3D model [1].
In the construction stage it's made both physical model of fibula and osteosynthesis implant, layer by layer, as follows:
A first peak was reached 3 days after osteosynthesis in malleolar fractures and after 3-7 days in the tibial group.
Before the introduction of direct anterior screw fixation for odontoid fractures, surgeons relied on posterior stabilization methods which were not primarily aimed at the osteosynthesis of the fracture site.
The proceedings of the 2008 congress of the Federation of European Societies for Surgery of the Hand (FESSH) are documented in this reference volume, with a particular emphasis on new developments in osteosynthesis.
The methodology proposed for determining the static and dynamic behaviour of implants used in femoral neck fracture osteosynthesis presents the following stages: 1.
Class I osteosynthesis - repair devices, ligament and meniscal sutures,
Tenders are invited for Framework Agreement for the Supply of Osteosynthesis Material
Tenders are invited for Materials and Purchase Framework Agreement Osteosynthesis Orthopedic Implants
Contract notice: Supplying sterile and implantable medical devices for orthopedics and osteosynthesis
Contract notice: The provision of implants for osteosynthesis and reconstruction.