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37 Cards in this Set

  • Front
  • Back
most common fracture pattern from simple fall
lateral split depression
incidence of associated collateral ligament injury in tibial plateau fractures
3% each for both MCL and LCL
pathognomonic injuries for cruciate ligament injury
segond fracture
reverse segond fracture
anteromedial tibial margin fractures
semimembranosus tendon insertion site fractures
split lateral plateau fractures typically result from...
low-energy forces from falls and twisting injuries
rate of compartment syndrome in all tibial plateau fractures
risk of compartment syndrome in Schatzker 6 fractures
eventual alignment of the knee after fracture healing is determined by...
extra-articular fracture deformity
residual articular depression
knee instability
important features of soft tissues
severity of swelling
visible contusions
fracture blisters (location, character, size)
AP view of plateau (10-15 degree caudal view)
descriptive classification
medial/lateral condyle involvement
split, split depression, local compression, bicondylar
presence of subluxation or dislocation
amount of articular surface depression
advantages of AO/OTA classification
identifies both articular and nonarticular fractures
distinguishes proximal tibia from tibial shaft fractures
distinguishes ranges of severity in high-energy patterns
rule of squares
identifies a proximal tibial fracture as one where the center of the fracture is within a square with one side along the articular surface and the length of a defined by the width of the metaphyseal segment
AO/OTA classification of proximal tibial fractures
A: extra-articular
1: avulsion (fibula, tibial tuberosity, cruciate insertion)
2: simple (obl frontal, obl sag, transverse)
3: multifrag (intact wedge, frag wedge, complex)
B: simple articular
1: split (lateral, medial, oblique)
2: depression (lat total, lat limited, medial)
3: split depression (lateral, medial, oblique)
C: complete articular
1: simple, simple
2: simple, multifrag metaphysis (intact wedge, frag wedge, complex)
3: articular multifrag (lateral, medial, bilateral)
Schatzker classification
1: lateral split or cleavage fracture
2: lateral split or cleavage depression
3: lateral local compression or pure central depression
4: medial condyle fractures
5: bicondylar fracture
6: shaft dissociated from metaphysis
associated injuries with type 4
compartment syndrome
peroneal nerve injury
vascular injury
(worse as fracture line moves laterally)
high incidence of associated ACL injury with?
posteromedial fracture patterns
weakness of Schatzker classification
wide range of patterns requiring different management strategies that all fit in Schatzker 6 category
fibular head attachments
biceps femoris tendon
IT band insertion
Gerdy's tubercle
lateral tibial plateau characteristics
flat or slightly convex
higher than medial side
medial tibial plateau characteristics
lower than lateral side
sagittal slope
0-14 degrees laterally
-3 to +10 degrees medially
coronal slope
-1 to +6 degrees
cartilage of tibial plateau
covered by hyaline
fibrocartilaginous menisci
coronary ligaments (meniscotibial ligaments)
which plateau has greater meniscal coverage
separation of medial and lateral plateau
intercondylar eminence and medial and lateral tibial spines
occults injury to anterior tibial artery may account for...
compartment syndrome
isolated lateral plateau fractures
percent open fractures
normal posteroinferior slope
10 degrees
why is fracture of lateral plateau more common?
medial articular surgace and supportin gmedial condyle are stronger than lateral counterparts
where trifurcation of popliteal artery is tethered
between adductor hiatus proximally and soleus complex distally
meniscal injury associated with plateau fractures
Segond sign
lateral capsular avulsion
Pellegrini-STeata lesion
calcification along the insertion of the MCL
signs of associated ligamentous injury
fibular head avulsion
surgical indications
articular depression >2 mm to 1 cm
instability >10 degrees of nearly extended knee compared to contralateral
compartment syndrome
associated vascular injury