Archaeology has given us a look into ancient orthodontic practices, unearthing mummified remains with teeth encased in metal bands, and writings by Hippocrates and Aristotle dating back to between 400 to 500 B.C. contain thoughts on how to straighten teeth and fix other dental problems. In the 1700’s writings are devoted to appliances and methods of aligning teeth. In the 1900’s, many different metals were used for bands and other portions of braces, such as wires. It wasn’t until the 1970’s however that brackets came into use, replacing bands. Although brackets had been invented sometime earlier, the adhesive took more time to perfect.