UNLABELLED In otosclerosis patients the most common procedure followed at Otosurgical Dept. Medical University of Lodz is stapedotomy with insertion of teflon-piston prosthesis. When surgery is finished a whisper hearing test is done from the 1 meter distance for brief intraoperative hearing improvement assessment. There is a number of patient who report subjective intraoperative hearing improv...

INTRODUCTION One of the most difficult and time-consuming steps in malleostapedotomy surgery is the crimping of the prosthesis onto the malleus handle manually. The advent of the nitinol prosthesis (Gyrus nitinol piston [GNP]; Gyrus ENT LLC, Bartlett, TN) significantly reduced the difficulty of this surgical step, rendering its fixation to the malleus easy and fast. However, Kwok et al. analyze...

The presented article shows the current scientific concept including diagnostics and therapy of otosclerosis with an emphasis on surgical treatment options. The three main proposed causes for otosclerosis are viral and hormonal origin as well as a genetic predisposition. In 25 to 50% a familiar accumulation can be seen. Usually patients become aware of clinical problems by a progressive middle ...

The thermal diffusivity of Teflon, sodium chloride, quartz, and silica glass was measured at 40øC to pressures of 35, 18, 30, and 36 kbar, respectively. A transient line source method was modified for use in a piston-cylinder high-pressure c ll. Pressure gradients were determined by experiments with bismuth foils. The pressure dependence of the thermal diffusivity at 40øC for the substances stu...

The melting temperatures have been determined for a wide range of substances as a function of pressure. In the present work, Teflon (polytetrafluoroethylene) was investigated up to 30 kb and the decomposition temperatures, and the melting temperatures of silver chloride and iodine were determined up to 30 kb and 20 kb, respectively. General Technique. -The pressure was generated with a piston-c...

Otosclerosis is defined as an overgrowth of the bone of the otic capsule just anterior to stapes footplate in between cochlea and vestibule. In such scenario, the stapes is unable to function normally as a piston and eventually becomes completely fixated, which results in a weaker conduction [1,2]. Clinical features are characterised by hearing loss, tinnitus and vertigo, of combination of thes...

OBJECTIVE Use of the SMart piston, a nitinol-based, self-crimping prosthesis in stapes surgery may allow improved functional results because of better sound transmission properties at the incus-prosthesis interface because of the elimination of manual crimping. Possible disadvantages include thermal damage or strangulation of the incus and its mucoperiosteum or nickel intolerance. The goal of t...

PATIENTS AND METHODS: Clinical and surgical records of 91 patients (29 men, 62 women; mean age 48 years; range 18 to 82 years) with otosclerosis were reviewed following stapedotomy with the small fenestra technique without interposition. The same Teflon-platinum piston was used in all the patients. Audiometric tests were performed within a week before the operation, 5 to 7 days (early evaluatio...

UNLABELLED Surgery of the stapedius remains the established treatment for otosclerosis. Recent publications have showed that success in surgeries done by residents have decreased and hearing results are worse than those obtained by experienced otologic surgeons. AIM To evaluate the experience of the otorhinolaryngology unit, Parana University, relative to stapes surgery done in the residency ...

OBJECTIVE To compare the hearing results in patients with otosclerosis who underwent a stapedotomy with either a platinum wire prosthesis or a commercially available, heat-activated nitinol stapes piston prosthesis. DESIGN Retrospective medical chart review. SETTING Academic tertiary care medical center. PATIENTS Seventy-nine consecutive patients diagnosed as having otosclerosis who under...