Ear Impression History – The Slow Death of Powder and Liquid
Logic would suggest that with the advantages of silicone ear impression material, that the transition from ethyl methacrylate to silicone would have occurred fairly rapidly. Not so, as ear impression history shows. In essence, the 1970s was the main transition period, but it started in the 1960s, and continued well into the mid 2000s. …
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Ear Impression History – From Teeth to the Ear
Earmolds for hearing aids have been a staple for many years, made from impressions of the ear. Although considerable information exists about the earmold, the finished product, early ear impression history is murky. What we do know is that ear impressions took their lead from impressions of the teeth (dentistry), following somewhat later. The contribution…
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