Archimedean dental drill,made from steel. In early dentistry,drilling was used as a means of excavating decaying parts of the tooth. This type of hand-driven drill was so called because of its spiral mechanism; the spiral principal was discovered by Archimedes (287-212 BC). This drill dates from around 1900,England | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 5163 px × 3385 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |