great prosthesis for reinforcement of visceral sac is a guranteed operation for unilateral or bilateral inguinal hernias in otil patients or recurrent cases. the greatest use of this technique is in the patients who are at specially high risk for recurrence. we successfully accomplished this technique in 70 cases in our hospital while the patients were countiniously under our close inspection f...

background: noise-induced hearing loss (nihl) is one of the most common occupational illnesses. most of the studies on nihl were conducted at high noise levels that people are rarely exposed to but in industries. the function of the outer hair cells (ohcs) is impaired after exposure to industrial noise. distortion product otoacoustic emissions (dpoaes) are useful in examination of noise-induced...

Background: Limb salvaging surgeries are current surgical treatment of extremity bone sarcomas. Resected bonereplacement consists of two main methods; tumor prosthesis versus structural allograft. Biological reconstruction withan allograft is an economic cheap method in young sarcoma patients, however, the surgeons are more convinced withtumor prosthesis replacement.Methods: We evaluated the sh...

AbstractIntroduction Silicone gel breast implants are used for breast reconstruction post mastectomy. In the event of cancer recurrence, the radiation oncologists are forced to irradiate through the prosthesis device. Due to prosthesis higher atomic number dose perturbations occur during treatment. This study determined the influence of silicone gel thickness on the photon beam distribution. Ma...

The inferior colliculus central nucleus (ICC) has potential as a new site for an auditory prosthesis [i.e., auditory midbrain implant (AMI)] for deaf patients who cannot benefit from cochlear implants (CIs). We have previously shown that ICC stimulation achieves lower thresholds, greater dynamic ranges, and more localized, frequency-specific primary auditory cortex (A1) activation than CI stimu...

The success and limitations of cochlear implants (CIs) along with recent advances in deep brain stimulation and neural engineering have motivated the development of a central auditory prosthesis. In this study, we investigated the effects of electrical stimulation of the inferior colliculus central nucleus (ICC) on primary auditory cortex (A1) activity to determine the potential benefits of an ...

Advances in auditory prostheses were accompanied by competing ideas and bold experiments in the 1960s and 1970s, an interesting and exciting time that was reminiscent of the Era of Warring States in ancient China (for a detailed review see Zeng et al. 2008). The most contested technological issue was between a single-electrode (House 1974) and a multi-electrode (Clark et al. 1977) cochlear impl...

For best hearing sensation, electrodes of auditory prosthesis must have an optimal electrical contact to the respective neuronal cells. To improve the electrode-nerve interface, microstructuring of implant surfaces could guide neuronal cells toward the electrode contact. To this end, femtosecond laser ablation was used to generate linear microgrooves on the two currently relevant cochlear impla...

OBJECTIVES/HYPOTHESIS To evaluate a transcanal approach for placement of a stimulating electrode array in the cochlear nerve. STUDY DESIGN Prospective cadaveric temporal bone study. METHODS Ten human cadaveric temporal bones were dissected. Both a facial recess approach with mastoidectomy and a transcanal approach using the novel technique were performed in each bone. A middle fossa dissect...

The cochlear implant is an electronic auditory prosthesis with a component that is surgically inserted in the ear and coupled with a detachable component that is worn externally like a hearing aid. It is designed to stimulate the spiral ganglion cells in patients whose hair cells have been lost (1). An auditory brain stem implant is a similar device implanted in or on the brain stem, to stimula...