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To the Editor:—
Many clinicians desiring a softer, more compressible rubber head for their neurological hammers than those of standard models, hand carve the heads from soft rubber stock such as that used for lead pencil erasers.In an attempt to fashion a neurological hammerhead with the desired softness but which also would be durable, a series of heads were made from various silicone-rubber formulations.Twelve hammerheads with initial durometer measurements of 24 were hand-fashioned from the bulk polymer and have been kept in constant clinical use for six years. Six of the hammers were used in an isolation unit where they have been subjected to over 100 routine autoclavings. Durometer measurements remained constant.Silicone rubbers for neurological hammerheads provide the clinician with a durable instrument with properties of compressibility and softness which are not altered by time or autoclaving.
Stewart RD. Improved Neurological Hammer. JAMA. 1965;193(9):744. doi:10.1001/jama.1965.03090090050022
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