[Design and clinical application of new type two-head automatic pressure external fixation (TAPEF)].

Objective: To design a new type two-head automatic pressure external fixator and explore its clinical effects in treating intertrochanteric fracture of the femur.

Methods: Base on unilateral angulated external fixator and Ilizarov techiques, a new type two-head automatic pressure external fixator were designed and made. From October 2006 to December 2010, 120 patients with intertrochanteric fracture of the femur were treated with the new type two-head automatic pressure external fixator.

[Biomechanical study of new type two-head automatic pressure external fixator (TAPEF) for the treatment of intertrochanteric fracture].

Objective: To investigate the mechanical characteristics of new type two-head automatic pressure external fixator in the view of biomechanics.

Methods: Fifteen fresh and humid specimens were selected and divided into experimental group (5 cases) and control group (10 cases). The control group were respectively applied with DHS (5 cases) and traditional external fixator (5 cases).