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Aim of this experimental study: Was to test the resistance to mechanical force of a double Yshaped titanium miniplate versus conventional straight titanium miniplate for the treatment of mandibular angle fracture. Materials and methods: Ten fresh sheep hemi mandibles, sectioned at the angle region, were used to evaluate two plating techniques. One group (Group A) received fixation via a double Yshaped titanium miniplate and the second group (group B) via a six-hole conventional straight non-compression titanium miniplate .Each hemi mandible in group A and group B was subjected to tensile forces using universal testing machine. Results: During the test, the group (A) fixed by double Y-shaped miniplate, the plates were fractured in all group samples at mean of the Yield load (745N). The mean degree of displacement of this group was 7.8mm). While in group (B), the conventional straight titanium mini plates were fractured at force (the mean; 665.6N). The mean of degree of displacement of this group was 7.8mm) Conclusion; Double Y-shaped miniplate with 6 holes and 9.0 mm spacing had greater resistance to displacement and provided more favorable biomechanical behavior than the conventional straight miniplates in the repair of mandibular angle fractures.

Biomechanical evaluation of double Y-shaped versus conventional straight titanium miniplates for the treatment of mandibular angle fractures