Authors: R. Cruz, M. F. Paulino, L. M. Roseiro, F. Moita, M. A. Neto, A. M. Amaro

Bone fractures can occur frequently, most often due to accidental causes. When a bone fracture arises there is necessary to stabilize the fracture in order to assure a good bone regeneration. To this end, orthopedist’s use mechanical systems called external and internal fixators. The process of bone regeneration is based on the formation of bone callus, which must be stimulated in order to promote the acceleration of bone formation. To promote the bone stimulus in patients with fractures, the patients are encouraged to start walking before the complete remove of the fixation device, assuring a naturally induced stimulus. However, in patients with reduced mobility or bedridden, the application of induced stimulation is necessary. The aims of this work is to introduce movements in the fracture focus that should be similar to the natural stimulus, by using an electromechanical system that applies micromovements in the fixator. These micromovements have the function of accelerating bone formation, decreasing the time of consolidation and providing an improvement in the clinical treatment of patients.

R. Cruz¹, M. F. Paulino² | L. M. Roseiro^2,3 | F. Moita³ | M. A. Neto²| A. M. Amaro²
1 Mechanical Engineering Department, University of Coimbra, Portugal
2 CEMMPRE, Department of Mechanical Engineering, University of Coimbra
3 Mechanical Engineering Department, Polytechnic Institute of Coimbra, Coimbra Institute of Engineering