Test 1: bone plating 2 Flashcards
plate rod fixation is — with —
IM pin with bridging plate
the IM pin will help align bone and maintain bone length while increasing resistance to bending
plate/rod fixation will reduce strain on the plate by —. and will increase fatigue life of plate by —
2x
10x
IM pin and plate
how big of IM pin or plate/rod fixation
35-40% of medullary cavity
allow screw placement
avoids excessive rigidity
normograde insertion (top down)
how many screw for plate/rod fixation
4 cortices on each side of fracture at least
IM pin and plate, pin can get in the way and need to use monocortical screws
if there is a pelvic fracture then
there is usually at least 3 fractures
ilial fracture
sarcoiliac (SI) luxation
articular (acetabular)
3 criteria for fixation of pelvic fracture
on weight bearing axis
Ilial fractures
Sacroiliac (SI) luxations
Articular (Acetabular)
how to fix pelvic fracture
bone plating
used for ilial and acetabular fractures
can use lag screws for SI luxation
how to fix SI luxation
lag screw
peri-articular fractures are harder to fix because
less bone to work with
to fix peri-articular fractures you may need
more stringent post op restrictions
adjunct fixation: external coaptation (splint) and transarticular fixator (exfix)
need extra help to keep in place
three ways to fix peri-articular fracture
ex fix: circular or hybrid
cross pin fixation and coaptation(splint)
bone plating with specialty or locking plate or double plating
how to fix articular fracture
- Meticulous anatomic reconstruction
- Absolute stability- rigid fixation
- Preservation of blood supply
- Early and safe mobilization
— can be helpful to visualize a fracture
CT- gives 3D image
cartilage must be attached to — to survive
subchondral bone
arthrodesis
when too damaged to repair
fuse joint
remove cartilage
autogenous graft
rigid fixation
