Abstract
The statistical survey on the development and pattern of abrasion in the crown, was done by using a number of skulls and sets of extracted teeth. Besides the detailed description of the abrasion phenomena, the characteristic of abrasion to each kind of the teeth, to upper and lower jaw, to dentitions of malocclusion and so forth were emphasized.
The exact knowledge about abrasion will help a great deal in dental morphology, anthropology, orthodontics, etc. However, to obtain this exact knowledge, further studies are needed on the relationships between age and wear, abrasion pattern in pathological dentitions, and comparison in various races.
