ArticleBMC musculoskeletal disorders2025
Effect of three cannulated compression screws combined with an obstructing screw on the biomechanical performance of pauwels type III femoral neck fractures: a finite element analysis.
Article in BMC musculoskeletal disorders, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Biomechanical comparison of inverted triangle and L-shaped screw configurations with medial buttress and anteromedial support plate in Pauwels type III femoral neck fractures.Archives of orthopaedic and trauma surgery · 2026Article
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7 authors.
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Abstract
backgroundObstructing screws (OS) are an effective surgical method for treating Pauwels type III femoral neck fractures. This study compared the mechanical properties of various surgical techniques for treating such fractures using finite element analysis.
methodsAn ideal finite element model of the femur was established based on computed tomography scans of healthy individuals. Four internal fixation methods were designed: the three cannulated compression screws (3CCS) group, 3CCS + horizontal screw (3CCS + HS) group, 3CCS + OS (3CCS + OS) group, and 3CCS + medial buttress locking plate (3CCS + BL) group. The same pressure direction and magnitude were applied to observe the stress distribution in the femur under different surgical techniques.
resultsThe stress distribution, fracture displacement, and femoral stiffness varied across the internal fixation groups. The 3CCS + OS group exhibited the most balanced femoral stress distribution (126.49 MPa), effectively dispersing stress on the CCS. Its overall femoral stiffness (510.95 N/mm) and fracture displacement (4.11 mm) were second only to the 3CCS + BL group (554.09 N/mm, 3.79 mm) and significantly better than the 3CCS (441.18 N/mm, 4.76 mm) and 3CCS + HS (449.68 N/mm, 4.67 mm) groups.
conclusionsThe combination of CCS and antishear OS demonstrated significant mechanical advantages and lower biological interference in the treatment of Pauwels type III femoral neck fractures. This method not only provides excellent mechanical stability but also ensures biological safety, offering benefits such as simplicity of operation, minimal invasiveness, and a low risk of complications. It holds great potential for widespread clinical application.
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