Metacarpal And Metatarsal Bones Flashcards
For common views of the metacarpal or metatarsal bones
Lateral, DP, DLPMO, DMPLO
Oblique views highlight what
Splint bones
Periostitis and stress fractures
Also known as
Collectively known as
Most common in
Radiographic changes
Bucked shins and saucer fractures
Dorsal metacarpal disease
Racehorses
Microfractures in subperiosteal hemorrhage occur leading to subperiosteal Callus
Osteitis and osteomyelitis of MC/MT
Susceptible to… Because…
Sequestrum formation
Lack of soft tissue covering these bones
Injury to the outer surface of the bone may cause loss of the periosteal blood supply resulting in death of the outer 1/3 of the cortex creating is a question
Radiographic signs of osteitis are visible when?
Sequestrum will become visible when?
7 to 10 days
3 to 4 weeks
Three parts of a sequestrum and definition of each
Sequestrum – sclerotic piece of bone, lucent zone surrounding is granulation/purulent material
Involucrum – sclerotic, thickened bone surrounding The sequestrum
Cloaca – draining tract
Two radiographic changes as a result of injury to the suspensory origin
– Osseous remodeling (lysis, sclerosis, and enthesiopathy) or avulsion fracture at the origin of the suspensory ligament
– Rather than detaching a piece of bone, the ligament may tear away from its bony attachments resulting in subperiosteal hematoma
Avulsion
Splints
Formation, More common location, important radiographic fact
– Interosseous ligaments between second and fourth MC/MT bones and MC/MT 3
– Strain on the inter-osseous ligaments leads to periostitis
-this proliferation is termed a splint
– More common in for Lim’s then hindlimbs
– Difficult to differentiate an active splint from an in active one radio graphically
Split bone fractures
Often caused by…
Characteristic of proximal fractures
May be associated with… Pathology
Secondary to blunt trauma
Comminuted
Suspensory ligament
