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BREGADIOLI, T. Comparação biomecânica e da redução óssea de Clamp and Rod Internal Fixation (CRIF) e placa de reconstrução bloqueada em fraturas de acetábulo [Biomechanical comparison and bone reduction assessment of acetabular fractures fixed with clamp and rod internal fixation (CRIF) or locking reconstruction plate]. 2017. 108 f. Dissertação (Mestrado em Ciências) – Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, 2017. The aim of this study was to compare the accuracy of reduction and biomechanical characteristics of acetabular osteotomies repaired with 2.7-mm Clamp and Rod Internal Fixation (CRIF) constructs or 2.7-mm locking reconstruction plates in cyclic and load to failure flexion tests. Nine dog cadavers with body weight between 15 and 35 kg were included in this study. All 18 hemipelves were randomly assigned into two groups named after the implants tested, group CRIF (GC) and group Plate (GP). All pelves were used to test both groups with each hemipelvis belonging to a different implant group. Acetabular osteotomies were created with an oscillatory saw and then fixed according to the AO/ASIF standards, using either 5-hole, 2.7-mm locking reconstruction plates with three locked screws cranial and two caudal to the osteotomy line, or CRIF constructs with 5 clamps, three located cranial and two caudal to the osteotomy line. Load to failure at GP (22.38 ± 8.44N.m) was significantly higher than GC (15.60 ± 5.76N.m), (p = 0.02408). Imprinted cast of acetabular reduction gap after 30 cycles was statistically smaller at GP (0.27 ± 0.24mm) than GC (0.49 ± 0.29mm) (p = 0.04784). We concluded that the appliance of locking reconstruction plates is simple and should be considered for acetabular fractures, that require perfect anatomical reconstruction. Key-words: Fracture Fixation Internal, Bioengineering, Cartilage Articular, Fracture Healing, Dogs.

&lt;b&gt;Comparação biomecânica e da redução óssea do &lt;i&gt;Clamp&lt;/i&gt; &lt;i&gt;and Rod Internal Fixation&lt;/i&gt; e placa de reconstrução bloqueada em fraturas de acetábulo&lt;/b&gt;