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<p>[QUOTE=&quot;Jivvy, post: 775004, member: 8184&quot;]I haven&#039;t secured an art reference, but dentists have been making impression molds since the&nbsp; early 1800s. </p><p><br /></p><p><a href="https://www.ncbi.nlm.nih.gov/pubmed/28777510" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ncbi.nlm.nih.gov/pubmed/28777510" rel="nofollow">https://www.ncbi.nlm.nih.gov/pubmed/28777510</a><i></i></p><p><i>&quot;Beeswax represents the first impression material, while important bechmarks during the historical evolution of dental impression materials are considered to be the introduction of dental trays in the early 1800s and the invention of the gutta-percha, thermoplastic resins and plaster of Paris.&quot;</i>[/QUOTE]</p><p><br /></p>

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