Table 1 The Pubmed database literature search strategy

#1

“Femoral Neck Fractures”[Mesh]

#2

Femoral Neck Fractures

#3

Femoral Neck Fracture

#4

Femur Neck Fractures

#5

Femur Neck Fracture

#6

#1 OR #2 OR #3 OR #4 OR #5

#7

“Femur Head Necrosis”[Mesh]

#8

Femur Head Necrosis

#9

Femur Head Necroses

#10

Head Necrosis, Femur

#11

Necrosis, Femur Head

#12

Aseptic Necrosis of Femur Head

#13

Necrosis, Aseptic, of Femur Head

#14

Necrosis, Avascular, of Femur Head

#15

Ischemic Necrosis Of Femoral Head

#16

Femoral Head, Avascular Necrosis Of

#17

Avascular Necrosis Of Femoral Head, Primary

#18

Avascular Necrosis of Femur Head

#19

#7 OR #8 OR #9 OR #10 OR #11 OR #12 OR #13 OR #14 OR #15 OR #16 OR #17 OR #18

#20

“Fracture Fixation”[Mesh]

#21

Fracture Fixation

#22

Fixation

#23

Internal fixation

#24

#20 OR #21 OR #22 OR #23

#25

#6 AND #19 AND #24