Introduction: Mandibular reconstruction techniques have limitations, particularly when a bone segment of the mandibular angle has been lost. When angled reconstruction plates are used, the stress of muscle action may lead to plate fractures and consequent complications.

Aim: This study describes a complementary angle reinforcement plate for mandibular reconstruction developed to provide greater resistance to the system by the author in an oromaxillofacial technical development office of MDT – Indústria Comércio Importação e Exportação de Implantes LTDA ., Rio Claro, Brazil.

Material/method: Preclinical trials tested static mechanical behaviors and dynamic resistance-fatigue and were conducted in the Biomechanical Engineering Laboratory of the University Hospital of Universidade Federal de Santa Catarina, Florianópolis, Brazil (Engineer: Carlos Rodrigo Roesler). Test parameters were those prescribed by the ASTM F382-99 Standard Specification. Standardized mandibular reconstruction plates were fixed to polyethylene blocks, to which forces were applied to simulate physiological loading of the specimens (5 per trial). After that, the plates were sent for analysis and approval by the National Sanitary Surveillance Agency of the Brazilian Health Ministry.

Results: Results showed that the angled mandibular reconstruction plates had acceptable resistance indices for the application suggested; when used as a complement of angle reinforcement, they increased resistance to the action of simulated masticatory forces.

Conclusion: Angled reinforcement plates for mandibular reconstruction add rigidity to the system, provide greater stability and a better prognosis for clinical cases that present with loss of a bone segment in the mandibular angle.

Conflict of interest: None declared.