Table 1.

Characteristics, Demographics and findings of included studies on FNS.

	Authors/Year	Study Period/Country of study	Mean Age (Range in Years) Gender (Male Vs Female)	Femoral neck system (FNS) usage	Other Implants used	Conclusion of the study
1	Zhang Y et al., 2022	2019–2020 China	54.9(28–66) years, 26 M 43F	33	36	FNS application linked to minimal surgical trauma, improved stability, and lesser complication
2	He C et al., 2021	2018–2020 China	50.61 ± 10.30 vs 47.58 ± 10.31 years (18 M,15F vs 22 M,14F)	33	36	Compared to CS, the FNS decreased the frequency of peroperative imaging's, radiation exposure, and early complications such as shortening of the femoral neck and its nonunion.
3	Hu H et al., 2021	2017–2020 China	50.45 ± 8.45 26 M vs 18F	20	24	FNS has a higher construct stability. No significant difference in the probability of AVN. Cut-out of screw and shortening of the neck was significantly lower in FNS group than in CCS group
4	Nibe Y et al., 2021	2006–2020 Japan	79.5 11 M vs 41F	25	27	In older patients with Femoral neck fractures, FNS had a shorter operative duration and a reduced revision surgery.
5	Tang Y et al., 2021	2019–2020 China	56.1 71 M vs 21F	47	45	FNS was comparable to CCS with regards to surgical time, length of incision, intraoperative blood loss, and complications. However, FNS group had better Harris hip score, shorter fracture healing time, and lesser neck shortening
6	Vazquez O et al., 2021	2015–2019 Switzerland	84.9 ± 6.4 12 M vs 51F	15	48	FNS had significantly lower surgical duration and had equal efficacy to DHS and CCS
7	Zhou X et al., 2021	2019 China	53.84 24 M vs 36F	30	30	FNS was costlier however more appropriate for treating Pauwels type-3 fractures as compare to CCS and had lesser soft tissue trauma speedy recovery lesser complication.
8	Yan C et al., 2021	2018–2020 China	52(47–63)yrs vs 49(47–56)yrs, (10 M,14F vs 38 M,20F)	24	58	FNS could lead to faster fracture healing and rehabilitation, thereby reducing complications.
9	Yang J et al., 2021	2019–2020 China	(47.8 ± 9.8) yrs vs (43.7 ± 13.1) yrs, (30 M,17F vs 26 M,21F)	47	47	Compared with CCS fixation, FNS fixation shortened operative time and fracture healing time, allowed patients to ambulate early after surgery, and better functional recovery of the hip(HHS).
10	Yang Y et al., 2021	2019–2020 China	NA	15	19	Compared with CCS, FNS can reduce surgical trauma, intraoperative fluoroscopy frequency and obtain satisfactory short-term effectiveness.
11	Wei X et al., 2021	2019–2020 China	(54 ± 13) yrs vs (53.2 ± 11.3) yrs, (38 M,24F vs 42 M,15F)	62	57	In comparison to CCS, FNS can significantly decreased intraoperative C arm exposure duration, reduced surgical and inpatient time. FNS fastened the fracture healing and promoted better functional recovery.

Abbreviations: CCS= Cancellous Cannulated system; FNS= Femoral neck system; TS = Triple screw construct.