PFN PFNA PFNA2 TFN differences and features

PFN PFNA PFNA2 TFN differences and features
Tfn
TFN is made of a stainless steel 316L type. The system consists of a cannulated nail, cannulated hip screws 8 millimeters and 6.4 millimeters, locking bolts (4.9 millimeters). The proximal diameter of the nail is 15 millimeters and length is 180 millimeters. The diameter varies from 9 to 12 millimeters. The angle between the nail and screw used is either 130 and135 . Distally there are two holes for static and dynamic locking.

Proximal diameter of 17 mm
Distal diameter of 10 11 12mm

Preassembled locking mechanism for control of blade rotation and travel



Angles 125 130 135

Universal r and left

Long flexible tip
    Entry was made with a curved awl just lateral to the tip of greater trochanter.
    • Lateral entry point (6° lateral to greater trochanter) ideal for overweight patients, where piriformis fossa entry can be challenging

    • Lateral entry point (6° lateral to greater trochanter) ideal for overweight patients, where piriformis fossa entry can be challenging

    11.0 mm helical blade


    TFN system also offers a lag screw fi xation using an 11.0 mm femoral neck screw
pfna
The PFNA has a medial-lateral angle of 6° This allows insertion at the tip of the greater trochanter.
Several distal locking options
PFNA Blade Rotational and angular stability,Compaction of cancellous bone
PFNA blade is automatically locked to prevent rotation of the blade and femoral head.The flexible tip eases insertion and avoids stress on the bone at the tip of the implant.
  1. 12 mm short
9-14 long nails
 sidespecific

Pfna2
The PFNA-II has a medial-lateral angle of 5° This allows insertion at the tip of the greater trochanter.
The lateral flattened cross-section ease insertion.
All nails have a proximal diameter of 16.5 mm with a lateral flattened surface
 9 - 12 mm short nails
  1. 10 mm long nails
Side specific

pfn
Anatomical 6° ML angle
Self-tapping 6.5mm Hip Pin for rotational stability
Self-tapping 11.0mm Femoral Neck Screw

• Anatomical 1.5m radius (antecurvature)
Anatomical 10° anteversion
Proximal diameter 17.0mm
CCD angle 125°, 130°
Side specific



  • When compared to a column screw, use of the helical blade results in increased contact surface area between the device and the femoral head cancellous bone, compressing rather than removing the limited amount of bone.
  • PFNA blade may thus be a more biochemically suitable implant for unstable trochanteric fractures and trochanteric fractures associated with osteoporotic bone.
  • The PFNA2 device was recently introduced and appears to be better suited to the typical Asian patient who has smaller femurs

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