The eigenfrequencies the implant stapes piston type

Hearing is one of the senses, through which we learn about the world. Hearing impairment due to injury or disease affects the quality of life. The patient is unable to perform communicative functions. Otosclerosis - one of the most common diseases. Treatment is surgery to stapedioplasty. Technique of the operation has been known since 1958. When stapedioplasty one of the most vulnerable sections of conductive auditory ossicles is the stirrup, which is replaced by the prosthesis piston type rod. This type of operation is to microsurgery. To determine the natural frequencies of the method of finite elements. The differential equation of longitudinal vibrations of the rod. The natural frequencies of the prosthesis is much higher sound range and fall into the super-high-MHz range. In order to reduce the effect of radiation of mobile phones and car alarms in the auditory system of the person introduced the criterion of first natural frequencies of the output of the graft-MHz range, so the material and shape of the prosthesis are determined by minimizing the first natural frequency. The prosthesis is modeled in engineering software package. Form is selected, the corresponding longitudinal vibrations that provide conductivity ear from the middle ear to the inner ear. Considered the natural frequencies of a homogeneous rod of different materials. According to the results of the best materials are teflon and gold. To determine the natural frequencies of a comparison of analytical and approximate solutions obtained using the finite element method.