Mechanical analysis of femoral neck fracture fixation in synthetic bone

• Published in: Acta ortopedica brasileira 2014, Vol.22 (3), p.155-158
• Main Authors: Freitas, Anderson, Azevedo, Bruna Alves Soares, de Souza, Roberto Rodrigues, da Costa, Hélio Ismael, Maciel, Rafael Almeida, Souto, Diogo Ranier de Macedo
• Format: Article
• Language: English
• Subjects: Biomechanical phenomenas; Femoral neck fractures; Fracture fixation, internal; Original; ORTHOPEDICS
• ISSN: 1413-7852; 1809-4406; 1413-7852; 1809-4406
• DOI: 10.1590/1413-78522014220300914

To analyze statistically results obtained between biomechanical assays on fixation of femoral neck fracture type Pauwels III, on synthetic bone, using 7.5 mm non parallel cannulated screws and control group. Ten synthetic bones from a national brand were used. Test group: fixation of 70((o)) tilt femoral neck osteotomy was performed using three 7.5 mm non parallel cannulated screws. We analyzed the resistance of this fixation with 5 mm of displacement, and rotational deviation (phase 1) and with 10 mm offset (phase 2). the models were tested in their integrity until the femoral neck fracture occurred. the values of the test group in phase 1, in sample 1-5 had a mean of 517N and SD = 96N. Rotational deviations showed a mean of 3.79° e SD = 2. 03°. In phase 2, mean was 649N and SD = 94N. The values of the maximum load in the control group were: 1544N, 1110N, 1359N, 1194N, 1437N; respectively. Statistical analysis between the groups showed a statistically significant lower value in the test group. the analysis of mechanical resistance between the groups has determined statistically significant value for the test group.