| bending fracture | <orthopaedics, radiology> An injury in which a long bone or bones, usually the radius and ulna, are bent due to multiple microfractures, none of which can be seen by X-ray imaging. (14 Aug 2000) |
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| bennett fracture | <radiology> Mechanism: forced abduction of thumb, findings: intraarticular fracture/dislocation of the base of the 1st metacarpal at the ulnar aspect, small fragment of metacarpal continues to articulate with the trapezium, lateral retraction of metacarpal shaft by abductor pollicis longus, difficult to keep in anatomical alignment, complication: pseudoarthrosis, better prognosis than Rolando fracture see: thumb fractures (12 Dec 1998) |
| Bennett's fracture | <orthopaedics> A fracture-dislocation of the first metacarpal bone (thumb) at the carpal metacarpal joint. (06 Aug 1998) |
| birth fracture | Fracture occurring during the trauma of delivery or, occasionally, before delivery in infants with osteogenesis imperfecta. (05 Mar 2000) |
| blow-out fracture | A fracture of the floor of the orbit, without a fracture of the rim, produced by a blow on the globe with the force being transmitted via the globe to the orbital floor. (05 Mar 2000) |
| boxer's fracture | Fracture of the neck of a metacarpal bone-typically of the fifth metacarpals. (05 Mar 2000) |
| capillary fracture | A fracture without separation of the fragments, the line of break being hairlike, as seen sometimes in the skull. Synonym: capillary fracture. (05 Mar 2000) |
| galeazzi fracture | <radiology> Fracture of the radius at the junction of the middle and distal thirds, with associated subluxation of the distal ulna see: forearm fractures (12 Dec 1998) |
| Galeazzi's fracture | <orthopaedics> A fracture of the forearm characterised by fracture of the shaft of the radius with dislocation of the distal radio-ulnar joint. (27 Sep 1997) |
| maisonneuve fracture | <radiology> Components: fracture of the proximal third of the fibula, rupture of the distal tibiofibular syndesmosis associated with: fracture of the tibia, rupture of the deltoid ligament caused by an abduction and external rotation force applied to the ankle which forces the talus laterally against the fibula (12 Dec 1998) |
| malgaigne fracture | <radiology> Two vertical fractures involving one side of the pelvic ring, one fracture anterior to the acetabulum, usually through the pubic ramus, one fracture posterior to the acetabulum, usually through the ilium, separation of the SI joint may occur instead usually the result of direct trauma (12 Dec 1998) |
| march fracture | <radiology> Stress or fatigue fracture of the metatarsals, seen in military recruits (associated with marching) (12 Dec 1998) |
| parry fracture | Rarely used synonym for Monteggia's fracture. (05 Mar 2000) |
| pathologic fracture | A fracture occurring at a site weakened by preexisting disease, especially neoplasm or necrosis, of the bone. (05 Mar 2000) |
| membrane fracture | Method of specimen preparation for the electron microscope in which rapidly frozen tissue is cracked so as to produce a fracture plane through the specimen. The surface of the fracture plane is then shadowed by heavy metal vapour, strengthened by a carbon film and the underlying specimen is digested away, leaving a replica that can be picked up on a grid and examined in the transmission electron microscope. The great advantage of the method is that the fracture plane tends to pass along the centre of lipid bilayers and it is therefore possible to get en face views of membranes that reveal the pattern of Integral membrane proteins. The E face is the outer lamella of the plasma membrane viewed as if from within the cell, the P face the inner lamella viewed from outside the cell. Fracture planes also often pass along lines of weakness such as the interface between cytoplasm and membrane, so that outer and inner membrane surfaces can be viewed. Further information about the structure can be revealed by freeze etching. Extremely rapid freezing followed by deep etching has allowed the structure of the cytoplasm to be studied without the artefacts that might be introduced by fixation. (18 Nov 1997) |