The pdf linked in other threads shows that the teeth have a fabric cord running through the middle of them. Then each tooth is surrounded by about 18 tiny stitches.
Yes, there are many places in the US that are currently having infrastructure crises due to too little density. There might need to be infrastructure upgrades as neighborhoods become denser, but over the long run, the infrastructure will be much more sustainable because the cost per user will be significantly lower.
https://imgur.com/a/o1jxAuS