The Teeth (Human Anatomy): Diagram, Names | 合法醫療器材資訊網

2020年6月28日—Anormaladultmouthhas32teeth,which(exceptforwisdomteeth)haveeruptedbyaboutage13:...Incisors(8total):Themiddlemostfourteeth ...

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The teeth are the hardest substances in the human body. Besides being essential for chewing, the teeth play an important role in speech. Parts of the teeth include:

• Enamel: The hardest, white outer part of the tooth[1]. Enamel is mostly made of calcium[2] phosphate, a rock-hard mineral. • Dentin: A layer underlying the enamel. It is a hard tissue that contains microscopic tubes. When the enamel is damaged, heat  or cold can enter the tooth through these paths and cause sensitivity or pain. • Pulp: The softer, living inner structure of teeth. Blood[3] vessels and nerves run through the pulp of the teeth. • Cementum: A layer of connective tissue that binds the roots of the teeth firmly to the gums and jawbone. • Periodontal ligament: Tissue that helps hol...