JVD 2016 # 1 - Bridging Plate Development for Treatment of Segmental Bone Defects of the Canine Mandible: Mechanical Tests and Finite Element Method Flashcards
According to “Bridging plate development for Tx of segmental bone defects of the canine mandible: mechanical tests and finite element method” by Perez de Freitas, Melchert et al,
what are some causes of mandibular segmental defects?
What are the goals of reconstructive treatment?
trauma, ballistic projectiles, severe perio, mandibulectomy (tumor, other);
goals: reestablish bone continuity, obtain appropriate dental occlusion (prevent drift), and restore functional aspects
According to “Bridging plate development for Tx of segmental bone defects of the canine mandible: mechanical tests and finite element method” by Perez de Freitas, Melchert et al,
what are the most common implants used for mandibular reconstruction?
where are they typically placed?
Where is the tensile zone of the mandible?
bone plates and screws (could also use in conjunction w BMPs– not mentioned);
placed on ventral aspect of mandible
tensile surface is dorsal aspect
According to “Bridging plate development for Tx of segmental bone defects of the canine mandible: mechanical tests and finite element method” by Perez de Freitas, Melchert et al,
what is the complication with the location of the tensile zone of the mandible (why can’t it be used)?
dorsal aspect of mandible has tooth roots and mandibular canal that may be in the way
According to “Bridging plate development for Tx of segmental bone defects of the canine mandible: mechanical tests and finite element method” by Perez de Freitas, Melchert et al,
briefly explain the study design.
4 healthy dogs (Rottie, Dobie, Boxer, Mini poodle) used, CT and 3D models made.
6 mandibular prototypes made for each dog breed with a segmental bone defect in the right mandible level of (409).
Bridging plate and monocortical locking screws designed. Plates were made of titanium and4 screws 4 on either side of defect
Cantilever bending performed on 20 mandible prototypes with load applied to fourth premolar tooth.
According to “Bridging plate development for Tx of segmental bone defects of the canine mandible: mechanical tests and finite element method” by Perez de Freitas, Melchert et al,
What were the results in regard to failure in each breed?
in large dogs usually the non-plated mandible broke,
in poodle the mandible with the construct broke, plate bent and screws pulled out.
According to “Bridging plate development for Tx of segmental bone defects of the canine mandible: mechanical tests and finite element method” by Perez de Freitas, Melchert et al,
was the bridging plate overall able to support bite force for each evaluated dog?
Yes; at least 5x (more in certain breeds).
