Additional file 1 of Safeguarding our dentistry heritage: a study of the history and conservation of nineteenth–twentieth century dentures
Creators: name: Neves, Artur
name: Friedel, Robert
name: Callapez, Maria Elvira
name: Swank, Scott D.
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 1: Figure S1. Advertisement for Hecolite in the Evening Star, Washington, D.C, Friday, February 8, 1935. Figure S2. Advertisement for Alcolite in the Indianopolis Times, March 21, 1933. Figure S3. Resovin dental platefrom the Smithsonian Collection, ID number MG.260892.295. Figure S4. Raman MIRA DS analysis of the swaged gold and celluloid dental plate JUSTI 21 from NMD (left) and of the vulcanized rubber and Vitallium alloy denture MG.291116.0046 from NMAH (right), using the 3 mm distance objective set up. Figure S5. NMAH’s dentures and micro sampling location. Denture photographs source: Smithsonian Institution. Table S1. NMD’s denture and sampling location. The microscope images were collected with a DINO-LITE digital microscope. Figure S6. Right, celluloid denture inside the X-ray fluorescence spectrometer S1 Titan analysis chamber. The analysis area where the x-ray beam interacted with the object is beneath the denture. The chamber lid was closed for analysis. Left, different view where it is possible to see the X-ray fluorescence spectrometer S1 Titan beneath the analysis chamber. The trigger had to pressed during the analysis; the time corresponding to the acquisition time. Figure S7. Handheld Raman spectra of the celluloid dentures’ from NMD and NMAH, namely SSW19 (10 s), 2002.99.4796 (7 s), 2022.99.5818 (8 s), 2022.99.5287 (6 s), 92.2.0924 [10], MG.M-09686 dental blank (2.6 s) and JUSTI 21 (7 s). Figure S8. Infrared spectra of the celluloid dentures’ microsamples from NMD and NMAH. Figure S9. Photographs with a 65MP camera (top) and with a Dinolite USB digital microscope AM2111-0.3MP (bottom) showing the overall conservation condition of 2002.99.5780, showing the brown areas across the red celluloid and yellowed teeth with dark spots. Figure S10. Photographs with a 65MP camera (top) and with a Dinolite USB digital microscope AM2111-0.3MP (bottom) showing the conservation condition of 92.2.0924, namely the pitting effect at the celluloid gums. Figure S11. Handheld Raman spectra of the teeth of celluloid dentures SSW19 (2 s) and MG.M-09686 denture 1 (3.7 s). The tooth analyzed for each denture is identified with a circle. Figure S12. XRF spectrum of NMAH’s vulcanized rubber denture MG.291116.0046 in three different points, marked in the denture’s photograph. Figure S13. Infrared spectrum of a calcium stearate reference, for more details on this reference preparation and characterization please see Otero et al. (2014). Figure S14. Infrared spectra of NMD dental plate 2002.99.5496 (probably a Luxene dental plate from the Bakelite Corporation). Figure S15. Infrared spectra of NMD dental plate JUSTI 23 identified as PMMA. Bands at 1731 and 1150 cm−1 are saturated.