This study was aimed at knowing the influence of gait with total weight bearing on The main characteristic that make it different is the histology, because is formed by cystic spaces that contain blood. The osteoid production used to be limited. The prognosis of this tumor has change since the introduction of adjuvant chemotherapy. This type of tumor respond to chemotherapy even better than the primary osteogenic sarcoma. We present a case of telangiectatic osteosarcoma in a 8-year-old located in the distal tibia and we review the literature about this item.the possibility of breakage of the Grosse-Kempf''s locked femoral nail. The study consisted of two parts: firstly, we carry out a static linear study of the nail by means of a finite element method applying the different forces that the nail support during gait in order to know what type of forces affect more the structure.; secondly a kinematic-tridimensional study of gait was performed showing the phases in which the implant was more affected for different forces. Torsion forces specially at the single lines support phase during gait are the forces inducing the major stress at the implant. As conclusion, total weight bearing showed not be permited in patients with insufficient cortical support or static locking since there is an increase in the risk of breakage of the nail.

This study was aimed at knowing the influence of gait with total weight bearing on The main characteristic that make it different is the histology, because is formed by cystic spaces that contain blood. The osteoid production used to be limited. The prognosis of this tumor has change since the introduction of adjuvant chemotherapy. This type of tumor respond to chemotherapy even better than the primary osteogenic sarcoma. We present a case of telangiectatic osteosarcoma in a 8-year-old located in the distal tibia and we review the literature about this item.the possibility of breakage of the Grosse-Kempf''s locked femoral nail. The study consisted of two parts: firstly, we carry out a static linear study of the nail by means of a finite element method applying the different forces that the nail support during gait in order to know what type of forces affect more the structure.; secondly a kinematic-tridimensional study of gait was performed showing the phases in which the implant was more affected for different forces. Torsion forces specially at the single lines support phase during gait are the forces inducing the major stress at the implant. As conclusion, total weight bearing showed not be permited in patients with insufficient cortical support or static locking since there is an increase in the risk of breakage of the nail.