ABSTRACT
This is the first study to compare the biomechanical strength between the two different TTA plates. With the purpose of minimizing the incidence of implant failure, biomechanical tests were performed on 10 pairs of cadaveric hind limbs from dogs. The right hind limb of each dog was used as a model for the TTA plate fixed by fork, and the left pelvic limb was used as a model for the TTA plate fixed by screws. Tests were performed using a universal mechanical testing Kratos (r) machine, model KE 3000, equipped with a load cell of 3000N with a test speed of 20mm/min. The strength parameter and graphs generated were recorded via analog acquisition system TRACOMP-W95 (TRCV61285). The mean load to failure was 128.70kg/F (minimum 104.55kg and maximum 151.80kg/F) and 141.99kg/F (minimum 111.60kg/F and maximum 169.65kg/F) in the fork and screws groups respectively. The standard deviation of the fork and screws groups was low: 12.99 and 17.21 respectively. Significant difference (P= 0.03) between means of the groups was observed. From the results obtained it was concluded that there is a statistically significant difference in the resistance between plates and the plate fixed by screws promotes increased strength.
Keywords:
cruciate ligament rupture; biomechanical test; resistance; implants
