NONUNION 2 Flashcards
T/F, bisphosphonates can increase fx risk?
T
how to ID a septic nonunion?
clinical suspicion sinus tract acute pain plain films ESR CRP blood culture joint aspiration surgery, ex plant/HWR
*use gas and CT
lipus does not lead to a significant increase in?
cytokine levels in patients with nonunions
*study shows failed tx of long bone nonunions with low intensity pulsed ultrasound
most commonly used bone graft?
autograft, may provide osteoconduction osteoinduction and osteogenesis
MSC numbers increase or decrease with age?
decrease with advancing age
allografts provide what kind of scaffolds?
osteoconductive scaffold
name this type of graft?
fresh
highly antigenic
limited time to test for immunogenicity or disease
use limited to joint replacement using shape matched osteochondral allografts
allograft
porous titanium wedge
3-D
open cell
osteoconductive
can backfill
structural support
what is this graft?
synthetic graft
significant cortical component spanning fixation may be needed compressive environment impart structure to surgical site opening wedge procedures lengthening procedures holding space
structural or nonstructural?
structural
cancellous bone
autogenous
not only for void filling
more commonly for imparting osteogenic osteoinductive potential
packed in and around graft or ingrafted arthrodesis site
common donor sites include iliac crest, anterior distal tibia, posterior calcaneal tuber
structural or non structural?
non structural
demineralized bone matrix is an example of?
major drawback?
bone graft substitute
-osteoinductive potential
sterilized which may decrease availability of BMP
types of allograft?
calcium phosphate
-high compressive strength once hardens
calcium sulfate
-can be used as autogenous graft extender
