Hammas jaotub kaheks olulisemaks osaks: hambakrooniks ja juur(t)eks. ... Krooni ja juurte ühinemiskoht on hambakael (cervix dentis) - piirkond, kus hambakroon (krooni ümbritsev emailikude) ja juur (juure pinda kattev tsement) ühinevad.
The roots are normally buried in bone, and they serve to anchor the tooth in position. The roots are covered with a thin layer of bone, and they are inserted into sockets in the bone of the jaw.
Each tooth consists of three portions: the crown, projecting above the gum; the root, imbedded in the alveolus; and the neck, the constricted portion between the crown and root.
Tooth roots contain sensitive nerve pulp and bony dentin, and they're covered by a substance called cementum. When tooth roots lose the protection of the gums, they're exposed to mouth contents like bacteria, plaque, acids, and also to extreme temperatures, causing tooth sensitivity.
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