Optimization Of Boneplate Positioning And Device Choice In Mandibular Fractures By A Computerprogram

The present study describes a biomechanical integrated model of the mandibular system in which the upper and lower jaw, the masticatory muscles and the temporomandibular joints were regarded as one system. In this model strains in plate-osteosynthesis devices, used in oral and maxillofacial surgery, can be minimized by optimizing their positions. The shape of a standard lower jaw is digitized by means of a 3D coordinate retrieval device and drawn on a computer screen after changing its dimensions according to the clinical case at hand. The 3D location of the fracture can be indicated on the screen as well as the anatomical restrictions for screw placement. Osteosynthesis devices can be indicated in tern of dimensions, number and material properties. The model evaluates maximal bite force strategies on all possible dental elements, using a linear programming technique and a muscle architecture model, resulting in muscle recruitment patterns.