Femoral neck system vs. cannulated screws for Pauwels type III femoral neck fracture in non-elderly patients: a systematic review and meta-analysis - Report - MDSpire
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Femoral neck system vs. cannulated screws for Pauwels type III femoral neck fracture in non-elderly patients: a systematic review and meta-analysis
Comparison of Femoral Neck System and Cannulated Screws for Pauwels III Fractures
Overview
This meta-analysis of 10 studies including 557 non-elderly adults with Pauwels type III femoral neck fractures found that the femoral neck system (FNS) offers faster fracture healing, earlier weight-bearing, fewer complications, and better hip function compared to cannulated screws (CS). However, FNS was associated with increased intraoperative blood loss.
Background
Pauwels type III femoral neck fractures are unstable fractures common in non-elderly adults and are associated with high rates of complications such as nonunion and femoral head necrosis. Internal fixation is the primary treatment to preserve the native hip joint, with cannulated screws (CS) being widely used due to minimal trauma and surgical time. However, CS have limited shear resistance leading to fixation failure in these unstable fractures. The femoral neck system (FNS) is a newer fixation device designed to improve angular and rotational stability, potentially reducing complications and improving outcomes.
Data Highlights
Outcome
Measure
Effect Size (95% CI)
P-value
Fracture Healing Time
Standard Mean Difference (SMD)
−0.90 (−1.30, −0.49)
<0.0001
Weight-Bearing Time
SMD
−1.17 (−1.61, −0.74)
<0.00001
Total Complications
Odds Ratio (OR)
0.16 (0.08, 0.33)
<0.00001
Harris Hip Score (HHS)
Mean Difference (MD)
2.07 (1.16, 2.97)
<0.00001
Intraoperative Blood Loss
MD
21.88 (12.48, 31.29)
<0.00001
Key Findings
FNS significantly reduced fracture healing time compared to CS (SMD = −0.90; P < 0.0001).
Patients treated with FNS achieved earlier weight-bearing (SMD = −1.17; P < 0.00001).
FNS was associated with a markedly lower rate of total postoperative complications (OR = 0.16; P < 0.00001).
Hip function measured by Harris Hip Score was superior in the FNS group (MD = 2.07; P < 0.00001).
Intraoperative blood loss was greater in the FNS group by approximately 22 mL (MD = 21.88; P < 0.00001).
Clinical Implications
For non-elderly adults with Pauwels type III femoral neck fractures, FNS provides enhanced mechanical stability leading to faster healing and improved functional outcomes compared to traditional cannulated screws. Despite the trade-off of increased intraoperative blood loss, the reduced complication rates and earlier mobilization suggest FNS may be the preferred fixation method in this patient population.
Conclusion
The femoral neck system demonstrates superior clinical efficacy and safety over cannulated screws in treating unstable Pauwels type III femoral neck fractures in younger adults. These findings support the adoption of FNS as a more effective fixation strategy in this challenging fracture type.
