fractures Flashcards
colles vs colles-like #
colles just radius
colles-like r and u
burst # in
short bones eg vertebrae
what is avulsion #
piece of bone torn off, usually by tendon or lig
what is subluxation
partial misalignment of jt surfaces
how do identify flexor hallucis/pollicis longus tendon
on x-ray
has sesamoid bone in it
the older you are, the better it is to have a…. hip replacement
cemented
how can hip replacement cause soft tissue damage
exothermic reaction burns into soft tissue
which bearing surfaces have the least wear rate
ceramic on ceramic
which is the main dorsiflexor? what is it innervated by
tibialis anterior, deep peroneal
which muscle/tendon can you use to replace tibialis anterior if you c=have knackered your common peroneal nerve. how, why?
tibialis posterior - move the insertion to the front of the ankle. it is innervated by the tibial nerve
what is hypertrophic and atrophic non- union
Hypertrophic – there is a blood supply that causes bone growth on either side of the fracture but if there is adequate insecure fixation the fracture moves and forms a callus that may continually break and reform.
Atrophic – no blood supply
what is osteogenesis in the context of bone grafts - what do you get
Osteogenesis
Formation or development of new bone cells contained in graft
The cells are the “seeds”
what is osteoconduction in the context of bone grafts - what do you get
Osteoconduction
Physical effect by which the matrix of the graft forms a scaffold that favours outside cells to penetrate the graft and form new bone
The scaffolds are the “trellis”
what is osteoinduction in the context of bone grafts - what do you get
Osteoinduction
Chemical process by which molecules contained in the graft convert the neighbouring cells into osteoblast
Growth factors are the “fertilizer”
what is osteopromotion in the context of bone grafts - what do you get
Osteopromotion
When the grafted material enhances osteoinduction
Trellis and fertilizer, or trellis and seed
