Abstract
Purpose
This study compared sliding between (a) lag screws of PFN (Proximal Femoral Nail, AO synthes) and (b) the helical blade of PFNA (Proximal Femoral Nail Antirotation, AO synthes) for femoral intertrochanteric fractures.
Materials and Methods
We include in our study thirty seven cases who were classified as AO/OTA type A1 femoral intertrochanteric fractures and who underwent hip operations between October 2006 and December 2008. There were 19 patients in the PFN group and 18 in the PFNA group. Degrees of sliding were also measured with postoperative radiology on last follow up compared with immediate postoperative radiology. Both groups were also compared with regard too walking ability using the method of Koval.
Figures and Tables
Fig. 1
86 years old male patient with AO/OTA type A1.1 intertrochanteric fracture. (A) Preoperative radiology showed intertrochanteric fracture with intact posteromedial cortex. (B) Immediate postoperative radiology showed stable fixation with PFN. (C) Radiologic finding on his postoperative 5 months showed bony union of fracture site.
![jkhs-22-79-g001](/upload/SynapseData/ArticleImage/0147jkhs/jkhs-22-79-g001.jpg)
Fig. 2
82 years old female patient with AO/OTA type A1.2 intertrochanteric fracture. (A) Preoperative radiology showed intertrochanteric fracture with impaction of proximal fragment. (B) Immediate postoperative radiology showed stable fixation with PFNA. (C) Radiologic finding on his postoperative 8 months showed bony union of fracture site.
![jkhs-22-79-g002](/upload/SynapseData/ArticleImage/0147jkhs/jkhs-22-79-g002.jpg)
Fig. 3
Measurement of sliding using radiographs. (A) Immediate postoperative radiograph. A: Screw length at immediate postop, B: Screw sliding at immediate postop. (B) Follow up radiograph. A': Screw length at the last follow up, B': Screw sliding at the last follow up, Correction factor: A'/A, Corrected follow up sliding: B'/Correction factor, Result: Corrected follow up sliding - B
![jkhs-22-79-g003](/upload/SynapseData/ArticleImage/0147jkhs/jkhs-22-79-g003.jpg)
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