A carregar...
Publicação
Safeguarding our dentistry heritage
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 5.67 MB | Adobe PDF |
Orientador(es)
Resumo(s)
In the 1870s, dentures were one of the first products made with celluloid, the first semi-synthetic plastic. Despite the significance of denture development in the history of celluloid and plastics, the chemical characterization of dentures in museum collections has never been attempted. It is urgent to assess the extent of celluloid heritage in denture collections due to the high degradation risk that this material imposes. In this work, 21 dentures from the National Museum of American History and from the Dr. Samuel D. Harris National Museum of Dentistry were characterized using a multi-analytical methodology using handheld Raman, X-Ray fluorescence, and micro-Fourier transformed infrared spectroscopies. All dentures were successfully characterized: 12 are made of celluloid, 4 of vulcanized rubber, 2 of phenol–formaldehyde, 2 of polyvinyl chloride—polyvinyl acetate copolymer (PVC-PVAc) and 1 of polymethyl methacrylate (PMMA). The identification of the dentures’ base materials allowed a better understanding of their history and posed new questions about their conservation. Handheld Raman was demonstrated as an excellent in-situ tool for the study of polymeric materials.
Descrição
Artur Neves thanks to Fulbright Portugal and to the Portuguese Foundation for Science and Technology (FCT/MCTES)] for funding this work (Fulbright grant PS00326022 and FCT doctoral grant PD/BD/136678/2018); We also thank FCT/MCTES for funding the project “The Plastics Metamorphoses—the reality and the multiple approaches to a material” (2022.05086.PTDC), and Associate Laboratory for Green Chemistry- LAQV (UID/QUI/50006/2019 and UIDB/50006/2020) co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). We thank the NEMOSINE project, 2020-NMBP‐35‐2017, grant agreement no. 76081, for supporting the transportation of Raman MIRA DS.
Publisher Copyright:
© 2023, The Author(s).
Palavras-chave
Celluloid Cellulose nitrate Dentistry Dentures Handheld Raman Phenol–formaldehyde Polyvinyl acetate (PVAc) Polyvinyl chloride (PVC) Vulcanite Conservation Chemistry (miscellaneous) Archaeology Materials Science (miscellaneous) Archaeology Computer Science Applications Spectroscopy