17th and 18th Centuries
Dental Impressions began around the beginning of the 17th century with Matthaeus Gottfried Purmann, who reported using wax to take impressions. Then in 1756, Phillip Pfaff used plaster of Paris.
Ultimately, progress in orthodontics stalled after ancient times until the 18th century, which saw a surge in development. Pierre Fauchard, born in 1728, is considered the Father of Dentistry, having invented an appliance called bandeau. This horseshoe-shaped strip of metal contained regularly spaced holes that fit around the teeth to correct their alignment. Fauchard would also operate on patients with a set of forceps called a pelican, forcibly realigning teeth and tying them to the neighboring teeth to hold them in place while they healed.
Then, Christophe-François Delabarre (1787-1862) tried separating overcrowded teeth by inserting swelling threads or wooden wedges between each space.