The following is a possible concise summary of the text:
The text is a transcript of a video by Mike, who shows the viewers what is inside a real tooth and explains the different parts and functions of the teeth. He also talks about how cavities are formed and how to prevent them. He uses models, a microscope, and a dremel to cut a tooth in half and show the enamel, dentin, pulp, and periodontal ligaments. He answers some common questions about teeth, such as why babies have whiter teeth than adults, why we have milk teeth, and why sharks have so many teeth. He invites the viewers to comment, like, subscribe, and watch more videos.
Here are some key facts extracted from the text:
- An adult human has 32 teeth, which are classified into incisors, canines, premolars and molars according to their shape and function.
- The teeth have three main layers: enamel, dentin and pulp. Enamel is the hardest and outermost layer, dentin is the yellowish and sensitive layer underneath, and pulp is the innermost and living layer with blood vessels and nerves.
- Cavities are caused by bacteria that feed on food residues and produce acids that erode the enamel and dentin. If cavities reach the pulp, they can cause severe pain and infection.
- Brushing the teeth and using dental floss can help prevent cavities by removing food residues and bacteria from the teeth.
- Baby teeth are whiter than adult teeth because they have more calcification and whiter dentin. Baby teeth are smaller and fall out to make room for the permanent teeth.