OBJECTIVE: To comparatively evaluate traction force (F) determined with the use of the eccentric screw in large compression dynamic plates (DCP-L). METHODS: Three DCP-L plates were used, from four national manufacturers, all in austenitic stainless steel ASTM F 138, and instruments available in boxes of 4.5mm. The plates were attached to two specimens of synthetic polyethylene, and traction force was applied using a 4.5mm screw inserted into the eccentric hole, using instruments specific to each manufacturer. The results were obtained by a servo-hydraulic machine BME 2000 160/AT, Brasválvula. The implants were divided into groups. (Fab I, II, III, IV). The tests were stopped after reaching a pinch force of the load screw of 5 N. RESULTS: Group I had a mean peak force (F Max) of 80.58 N; Group II: F Max 81.63 N; Group III: F Max 36.32N; and Group IV: F Max 37.52N. Using Krukal-Wallis Analysis of Variance (ANOVA non-parametric), where p = 0.05, there was a significant difference in maximum strength between the groups (p = 0.039). CONCLUSION: Plates DCP-L of group II showed greater strength (N) with plate fixation using the eccentric screw. Level of Evidence: Level III, analytical study.
Fracture fixation, internal; Bone plates; Bone screws; Biomechanics
