G E Merwin

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Four biomaterials, UF45S5 Bioglass, Silastic, Plasti-Pore, and Proplast, were used to replace the incus in a mouse ear model. Bioglass, a bioactive glass ceramic, compared favorably with the other test materials in maintaining surgical positioning between malleus and stapes and remaining stable to a blast of nitrogen gas and to pick manipulation. In a(More)
The transoral approach to pathology of the upper cervical spine is logical, but it is seldom used due to concerns about exposure and infection. The authors report on 16 consecutive patients requiring exposure from clivus through C3 for pathology, including spinal cord compression by rheumatoid pannus, craniovertebral anomalies, and tumor. Exposure was(More)
  • G E Merwin
  • 1986
The current status of materials for use in middle ear reconstruction is discussed with particular emphasis given to alloplastic implants including bioinert and bioactive materials. Bioglass is a bioactive transparent glass which forms a bond with living tissues. Its development and characteristics are discussed, and the early results of a clinical trial(More)
We compared the gross behavior of and microscopic response to implant materials currently in clinical use for facial bone augmentation at different sites in dogs. Materials evaluated include porous polytetrafluoroethylene carbon (Proplast), large-pore high-density polyethylene (Medpor), solid medical-grade silicone rubber (Silastic), polyamide mesh(More)
Local cerebral glucose utilization was measured by the [14C]-deoxyglucose method in five near-term fetal sheep in whom bilateral ablation of the cochleae had been accomplished aseptically 5 to 8 days earlier. The tympanic membrane and ossicles were removed and all turns of each cochlea were unroofed with destruction carried to the modiolus. Mean local(More)
The purpose of this investigation was to evaluate the speech perception of a patient fitted with a multichannel processor under different electrode conditions. The subject was evaluated with the speech processor programmed with electrode arrays varying in number from one to nineteen. The results suggested that with an increased number of programmed(More)
Postlaryngectomy speech rehabilitation more frequently includes surgical-prosthetic methods since the introduction of a low morbidity tracheoesophageal puncture technique and a one-way airflow valve. This study compares speech using an artificial larynx and, in one case, esophageal speech with speech using a tracheoesophageal puncture and valve in the same(More)
The reported incidence of arytenoid cartilage dislocation is low. This may be due to the wide range and orientation of motion allowed by the cricoarytenoid articulation and the laxity of its joint capsule. In two previously reported instances of arytenoid dislocation, the authors have suggested that endotracheal intubation is generally not sufficient to(More)
In the quest for a material other than autograft and homograft bone for use in facial augmentation and replacement, materials scientists have developed numerous inert materials, some of which have a porous structure allowing scar tissue ingrowth to aid in stabilization of the implant. This study investigates a bioactive, nonporous, transparent glass(More)
In the past, sodium, potassium, and chloride have been measured in endolymph directly, but bicarbonate has been measured only indirectly. We sampled endolymph directly while monitoring endocochlear potentials in normal and methazolamide-treated guinea pigs. Bicarbonate was determined in samples by use of a method that depends on reduction of NADH to NAD(More)