These materials included: "ivory balls, glass balls, vegetable oils, mineral oil, lanolin, beeswax, shellac, silk fabric, epoxy resin, ground rubber, ox cartilage, sponges, sacs, rubber, goat's milk, Teflon, soybean and peanut oil, and glazier's putty."
Severe infections would follow with the introduction of any and all of these materials and quack doctors eventually stopped using stuff like goat's milk.
Japanese prostitutes led the wave of silicone
Believing that American servicemen preferred women with a larger chest, Japanese prostitutes led the wave -- albeit a very uneducated wave -- of augmentation by using stolen industrial-grade silicone to inject into their own breasts.
This would lead to "silicone rot" in which gangrene formed around the injection site, as well as chronic "pain, skin discoloration, ulceration, infection, disfigurement, breast loss, liver problems, respiratory distress and pulmonary embolism, and even coma and death."
This came from the fact that these women would use industrial-grade silicone as opposed to medical-grade silicone.