Femoral Neck System versus Three Cannulated Screws for Fixation of Femoral Neck Fractures in Younger Patients: A Retrospective Cohort Study

Figures & data

Figure 1. Internal fixation model of the new internal fixation femoral neck system (FNS).

Table 1. Patient demographics and characteristics [mean (SD)].

	FNS	CCS	p Value
Cases	22	27
Gender [women/men]	10/12	13/14	0.85
Age [years]	51 ± 7.11	46.15 ± 11.76	0.10
Body mass index	24.19 ± 1.79	23.75 ± 1.27	0.32
Involved side [Right/Left]	11/11	8/19	0.15
Cause of injury
Motor vehicle collision	3	6	0.49
Fall(s)	19	21
Garden classification
I	0	1	0.83
II	6	7
III	9	10
IV	7	9
Pauwels type
I	1	3	0.70
II	13	15
III	8	9
Follow-up time (month)	21.26 ± 5.54	24.29 ± 5.72	0.07

Figure 2. Preoperative anteroposterior and lateral hip X-rays of a 53-year-old male patient with Left femoral neck fracture treated with FNS. (a) Preoperatively. (b) Postoperatively after 2 days. (c) Postoperatively after 6 months. (d) Postoperatively after 1 year.

Figure 3. Preoperative anteroposterior and lateral hip X-rays of a 40-year-old male patient with Right femoral neck fracture treated with CCS. (a) Preoperatively. (b) Postoperatively after 2 days. (c) Postoperatively after 6 months. (d) Postoperatively after 1 year.

Table 2. Comparisons of surgical outcomes in the two groups [mean (SD)].

	FNS	CCS	p Value
Surgical time (min)	67.41 ± 11.65	63.96 ± 22.88	0.52
Surgical blood loss (ml)	50.45 ± 5.28	20.67 ± 4.71	< 0.01
Fluoroscopy frequency (times)	16.64 ± 3.32	23.59 ± 3.39	< 0.01
Length of hospital stay (day)	7.91 ± 2.66	8.89 ± 2.35	0.18
Satisfaction VAS	84.61 ± 10.24	79.84 ± 9.85	0.10
Harris hip score (HHS)	90.07 ± 5.54	88.18 ± 6.19	0.27
Excellent and good rate	20 (90.9%)	24 (88.9%)	0.81
fracture healing time (months)	3.76 ± 0.42	4.46 ± 0.59	< 0.01
Femoral neck shortening (mm)	2.91 ± 1.95	4.44 ± 1.52	< 0.01
Complications
Nonunion	0	1	0.99
Femoral head necrosis	0	1	0.99
Nail withdrawal	1	6	0.03
Cut out the internal fixation	0	2	0.49