A computational simulation of the proposed design has been conducted, reproducing its performance and using a model "ad hoc" for the NiTi material. Methods Commercial orthosis have been characterized using a universal INSTRON 5565 machine. The experience of the authors in the design of other devices based on the NiTi alloy, makes it possible to carry out a new design in this work - the production of a finger splint for the treatment of the contracture in flexion of the PIP joint. Nowadays NiTi is commonly used in bio-engineering, due to its superelastical characteristics. It is important that the therapist has a splint available which can release a constant and sufficient force to correct the contracture in flexion. Its functioning is based on the application of a small load and a prolonged stress which can be dynamic, static progressive or static serial. The use of correcting splints is the common procedure for treating this problem. The contracture in flexion of the PIP, secondary to traumatisms or illnesses leads to an important functional loss. Abstract Background The proximal interphalange joint (PIP) is fundamental for the functional nature of the hand.
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