When a Tooth Goes Missing
Harrison Ford took a nasty fall and lost two of his teeth. Thanks to modern dentistry, he went on to become a major Hollywood star. For as long as we humans have been losing teeth, we've been filling the gaps. Early dentures were made from ivory, bone, silver, gold, agate, mother-of-pearl and teeth removed from cadavers. These were held in place with steel springs and silk thread. Only the wealthiest could afford them, and they didn't hold up well. Worse, they often hurt. People [...]