How did the Comanche Indians sharpen teeth?

The Comanche Indians, like some other Native American tribes, practiced dental modification by sharpening their teeth to create a pointed appearance. This was often achieved through the use of tools made from stone or other materials to grind down the teeth. This practice was likely done for aesthetic reasons, as well as to signify strength and warrior status within their culture. However, the specific techniques and tools used could vary widely among different groups and individuals.