"English tube-teeth". The introduction of artificial crowns in England. Those made with wood decayed by moisture (Fig. 3). The screw-pivot used in the patented Foster crown (1885) had a flat base with a perforation in the porcelain body to accommodate the pivot's top, which securely anchored it to a tooth. (Fig 4).

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: "English tube-teeth". The introduction of artificial crowns in England. Those made with wood decayed by moisture (Fig. 3). The screw-pivot used in the patented Foster crown (1885) had a flat base with a perforation in the porcelain body to accommodate the pivot's top, which securely anchored it to a tooth. (Fig 4). Wellcome Collection. Source: Wellcome Collection.