Table 3.
Literature review
| Authors/year | Origin | FNS patients | Comparison group/number of patients | Inclusion criteria | Follow-up (months) | Additional data collected | Number of reoperations (group/cause) | Results/conclusions FNS group |
|---|---|---|---|---|---|---|---|---|
| Vazquez et al./04.08.2021 | Switzerland | 15 |
DHS-16 CS-32 |
Patient’s age > 75 Fractures classified: Gardens 1 and 2, posterior tilt < 20° |
30 days | Radiographic femoral neck shortening | CS-1 |
• Shorter operative time • Reduced radiographic secondary fracture displacement |
| Cintean et al. / 19.9.2021 | Germany | 29 | HA-34 |
Fractures classified: Garden 1 ASA score > 3 |
0–22 | Charite Mobility Index (CHARMI) |
FNS-4 (all cutout) HA-3 (1 dislocation, 2 infections) |
• Lower nonsurgical complications • Shorter hospital stay, lower mortality rate |
| Nibe et al./ 30.04.2021 | Japan | 25 | Other-27 | Patient age > 65 | > 6 | non FNS group 6 (4 cut-outs, 2 hardware removals) |
• Shorter surgical time • Lower reoperation rate |
|
| Tang et al./16.08.2021 | China | 47 | CS-45 | > 12-month follow-up | 14–24 |
Radiographic femoral neck shortening Fracture healing time Harris hip score |
FNS group 6 (1 AVN, 3 cut-outs, 2 nonunions) CS group 12 (3 AVN, 5 cut-outs, 4 nonunions) |
• Lower radiographic femoral shortening • Shorter fracture healing time • Better Harris hip score at last follow-up |
| Stassen et al./ 07.11.21 | Germany | 34 | No comparison |
All nondisplaced FNF Displaced FNF for patients aged < 65 |
> 12 | Fracture healing time | FNS 8 (4 AVN, 2 cut-outs, 2 irritations from hardware) |
• Failure rates and technical difficulty are at least comparable to be established • CRIF systems |
| Niemann et al./26.02.2022 | Germany | 12 | DHS-19 | FNF | > 3 | Radiation exposure | Non reported |
• Lower radiation exposure • Shorter operative time |
| Zhang et al./18.02.2022 | China | 33 | CS-36 | Age < 65 | > 6 |
Radiation exposure Harris hip score |
CS-5 hardware removals |
• Improved surgical time • Lower radiation • Better Harris hip score • Lower removal rate |
| Zhou et al./13.08.2021 | China | 30 | CS-51 | Age < 65 | 10–22 |
Harris hip score Time to walk Cost analysis |
FNS 1–refracture CS-4 (2 nonunions, 3 hardware removals, 1 AVN) |
• Decreased reoperation • Higher cost • Higher intraoperative bleeding |
| He et al. / 29.11.2021 | China | 33 | CS-29 | Age 18–65 | 12–24 |
Radiation exposure fracture healing time Harris hip score |
FNS 4 (2 nonunions, 1 cut-out, 1 hardware removal) CS 8 (2 cut-outs, 2 nonunions, 2 hardware removals, 2 other) |
• No significant differences in fracture healing • Time and hip function • Reduced radiation exposure • Lower number of postoperative complications |
| Hu et al./09.07.2021 | China | 20 | CS-24 | Age < 65 | 12 (not clear) |
Fracture healing time Radiographic femoral neck shortening |
FNS 3 (2 nonunions, 1 AVN) CS 12 (6 cut-outs, 3 AVN, 3 nonunions) |
• Lower incidence of femoral neck shortening and screw cut-out • Shorter operative time |
CS cannulated screws, HA hip arthroplasty, DHS dynamic hip screw