Tooth, Unerupted
Tooth, Impacted
Tooth, Supernumerary
An extra tooth, erupted or unerupted, resembling or unlike the other teeth in the group to which it belongs. Its presence may cause malposition of adjacent teeth or prevent their eruption.
Cuspid
Tooth Crown
The upper part of the tooth, which joins the lower part of the tooth (TOOTH ROOT) at the cervix (TOOTH CERVIX) at a line called the cementoenamel junction. The entire surface of the crown is covered with enamel which is thicker at the extremity and becomes progressively thinner toward the cervix. (From Jablonski, Dictionary of Dentistry, 1992, p216)
Tooth Eruption
Tooth, Deciduous
Incisor
Any of the eight frontal teeth (four maxillary and four mandibular) having a sharp incisal edge for cutting food and a single root, which occurs in man both as a deciduous and a permanent tooth. (Jablonski, Dictionary of Dentistry, 1992, p820)
Tooth Root
The part of a tooth from the neck to the apex, embedded in the alveolar process and covered with cementum. A root may be single or divided into several branches, usually identified by their relative position, e.g., lingual root or buccal root. Single-rooted teeth include mandibular first and second premolars and the maxillary second premolar teeth. The maxillary first premolar has two roots in most cases. Maxillary molars have three roots. (Jablonski, Dictionary of Dentistry, 1992, p690)
Tooth Extraction
The surgical removal of a tooth. (Dorland, 28th ed)
Dental Enamel Hypoplasia
An acquired or hereditary condition due to deficiency in the formation of tooth enamel (AMELOGENESIS). It is usually characterized by defective, thin, or malformed DENTAL ENAMEL. Risk factors for enamel hypoplasia include gene mutations, nutritional deficiencies, diseases, and environmental factors.
Molar
The most posterior teeth on either side of the jaw, totaling eight in the deciduous dentition (2 on each side, upper and lower), and usually 12 in the permanent dentition (three on each side, upper and lower). They are grinding teeth, having large crowns and broad chewing surfaces. (Jablonski, Dictionary of Dentistry, 1992, p821)
Malta
An independent state consisting of three islands in the Mediterranean Sea, south of Sicily. Its capital is Valetta. The major island is Malta, the two smaller islands are Comino and Gozo. It was a Phoenician and Carthaginian colony, captured by the Romans in 218 B.C. It was overrun by Saracens in 870, taken by the Normans in 1090, and subsequently held by the French and later the British who allotted them a dominion government in 1921. It became a crown colony in 1933, achieving independence in 1964. The name possibly comes from a pre-Indoeuropean root mel, high, referring to its rocks, but a more picturesque origin derives the name from the Greek melitta or melissa, honey, with reference to its early fame for its honey production. (From Webster's New Geographical Dictionary, 1988, p719 & Room, Brewer's Dictionary of Names, 1992, p330)
Maxilla
One of a pair of irregularly shaped bones that form the upper jaw. A maxillary bone provides tooth sockets for the superior teeth, forms part of the ORBIT, and contains the MAXILLARY SINUS.
Bicuspid
Tooth Germ
The collective tissues from which an entire tooth is formed, including the DENTAL SAC; ENAMEL ORGAN; and DENTAL PAPILLA. (From Jablonski, Dictionary of Dentistry, 1992)
Orthodontic Extrusion
Dental Sac
Dense fibrous layer formed from mesodermal tissue that surrounds the epithelial enamel organ. The cells eventually migrate to the external surface of the newly formed root dentin and give rise to the cementoblasts that deposit cementum on the developing root, fibroblasts of the developing periodontal ligament, and osteoblasts of the developing alveolar bone.
Radiography, Panoramic
Tooth Eruption, Ectopic
An abnormality in the direction of a TOOTH ERUPTION.
Calendula
Odontometry
Measurement of tooth characteristics.
Dental Pulp
Radiography, Bitewing
Tooth Wear
Loss of the tooth substance by chemical or mechanical processes
Dentigerous Cyst
Odontoblasts
Odontoblasts are columnar, highly differentiated, dentin-forming cells that originate from the ectodermal neural crest and reside within the pulp cavity of teeth, characterized by their production and secretion of the organic matrix component of dentin during amelogenesis.
Dentin
The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992)
Tooth, Nonvital
A tooth from which the dental pulp has been removed or is necrotic. (Boucher, Clinical Dental Terminology, 4th ed)
Tooth Discoloration
Any change in the hue, color, or translucency of a tooth due to any cause. Restorative filling materials, drugs (both topical and systemic), pulpal necrosis, or hemorrhage may be responsible. (Jablonski, Dictionary of Dentistry, 1992, p253)
Odontogenesis
The process of TOOTH formation. It is divided into several stages including: the dental lamina stage, the bud stage, the cap stage, and the bell stage. Odontogenesis includes the production of tooth enamel (AMELOGENESIS), dentin (DENTINOGENESIS), and dental cementum (CEMENTOGENESIS).
Tooth Cervix
Dental Enamel
A hard thin translucent layer of calcified substance which envelops and protects the dentin of the crown of the tooth. It is the hardest substance in the body and is almost entirely composed of calcium salts. Under the microscope, it is composed of thin rods (enamel prisms) held together by cementing substance, and surrounded by an enamel sheath. (From Jablonski, Dictionary of Dentistry, 1992, p286)
Tooth Exfoliation
Tooth Avulsion
Partial or complete displacement of a tooth from its alveolar support. It is commonly the result of trauma. (From Boucher's Clinical Dental Terminology, 4th ed, p312)
Fused Teeth
Tooth Diseases
'Tooth diseases' is a broad term referring to various conditions affecting the teeth, including dental caries (cavities), periodontal disease (gum disease), tooth wear, tooth sensitivity, oral cancer, and developmental anomalies, which can result in pain, discomfort, or loss of teeth if left untreated.
Tooth Calcification
The process whereby calcium salts are deposited in the dental enamel. The process is normal in the development of bones and teeth. (Boucher's Clinical Dental Terminology, 4th ed, p43)
Tooth Ankylosis
Solid fixation of a tooth resulting from fusion of the cementum and alveolar bone, with obliteration of the periodontal ligament. It is uncommon in the deciduous dentition and very rare in permanent teeth. (Jablonski's Dictionary of Dentistry, 1992)
Tooth Erosion
Progressive loss of the hard substance of a tooth by chemical processes that do not involve bacterial action. (Jablonski, Dictionary of Dentistry, 1992, p296)
Tooth Socket
Tooth Replantation
Reinsertion of a tooth into the alveolus from which it was removed or otherwise lost.