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单词 tooth
释义

tooth


toothtop: cross section of a human toothbottom: teeth on mechanical gears

tooth

T0266900 (to͞oth)n. pl. teeth (tēth) 1. a. One of a set of hard, bonelike structures in the mouths of vertebrates, usually attached to the jaw or rooted in sockets and typically composed of a core of soft pulp surrounded by a layer of hard dentin that is coated with cementum or enamel at the crown and used for biting or chewing food or as a means of attack or defense.b. A similar hard projection in an invertebrate, such as one of a set of projections on the hinge of a bivalve or on the radula of a snail.2. A projecting part resembling a tooth in shape or function, as on a comb, gear, or saw.3. A small, notched projection along a margin, especially of a leaf. Also called dent2.4. A rough surface, as of paper or metal.5. a. often teeth Something that injures or destroys with force: the teeth of the blizzard.b. teeth Effective means of enforcement; muscle: "This ... puts real teeth into something where there has been only lip service" (Ellen Convisser).v. (to͞oth, to͞oth) toothed, tooth·ing, tooths v.tr.1. To furnish (a tool, for example) with teeth.2. To make a jagged edge on.v.intr. To become interlocked; mesh.Idioms: get/sink (one's) teeth into Slang To be actively involved in; get a firm grasp of. show/bare (one's) teeth To express a readiness to fight; threaten defiantly. to the teeth Lacking nothing; completely: armed to the teeth; dressed to the teeth.
[Middle English toth, from Old English tōth; see dent- in Indo-European roots.]

tooth

(tuːθ) n, pl teeth (tiːθ) 1. (Dentistry) any of various bonelike structures set in the jaws of most vertebrates and modified, according to the species, for biting, tearing, or chewing. 2. (Zoology) any of various similar structures in invertebrates, occurring in the mouth or alimentary canal3. anything resembling a tooth in shape, prominence, or function: the tooth of a comb. 4. (Botany) any of the various small indentations occurring on the margin of a leaf, petal, etc5. (Mechanical Engineering) any one of a number of uniform projections on a gear, sprocket, rack, etc, by which drive is transmitted6. taste or appetite (esp in the phrase sweet tooth)7. long in the tooth old or ageing: used originally of horses, because their gums recede with age8. tooth and nail with ferocity and force: we fought tooth and nail. vb9. (tr) to provide with a tooth or teeth10. (Mechanical Engineering) (intr) (of two gearwheels) to engage[Old English tōth; related to Old Saxon tand, Old High German zand, Old Norse tonn, Gothic tunthus, Latin dens] ˈtoothless adj ˈtoothˌlike adj

tooth

(tuθ)

n., pl. teeth, (ˈtu θɪŋ, -ðɪŋ) n. 1. (in most vertebrates) one of the hard bodies or processes usu. attached in a row to each jaw, serving for the prehension and mastication of food, as weapons of attack or defense, etc., and in mammals typically composed chiefly of dentin surrounding a sensitive pulp and covered on the crown with enamel. 2. (in invertebrates) any of various similar or analogous processes occurring in the mouth or alimentary canal, or on a shell. 3. any projection resembling a tooth. 4. one of the projections of a comb, rake, saw, etc. 5. a. any of the uniform projections on a gear or rack by which it drives or is driven by a gear, rack, or worm. b. any of the uniform projections on a sprocket by which it drives or is driven by a chain. 6. Bot. any small, toothlike marginal lobe. 7. a sharp, distressing, or destructive attribute or agency. 8. taste, relish, or liking. 9. teeth, effective power, esp. to enforce or accomplish something: to put teeth into a law. 10. a roughened surface, as on a sharpening stone, grinding wheel, or drawing paper. v.t. 11. to furnish with teeth. v.i. 12. to interlock, as cogwheels. Idioms: 1. in the teeth of, straight into, against, or in defiance of. 2. long in the tooth, noticeably old; elderly. 3. set one's teeth, to become resolute; prepare for difficulty. 4. show one's teeth, to become menacing; reveal one's hostility. 5. to the teeth, to the fullest extent; fully; entirely: armed to the teeth. [before 900; Middle English; Old English tōth, c. Old Frisian tōth, Old Saxon tand, Old High German zan(t), Old Norse tǫnn; akin to Gothic tunthus, Latin dēns, Greek odoús, Skt dánta]
tootha full set of adult human teeth

tooth

(to͞oth) Plural teeth (tēth) 1. Any of the hard bony structures in the mouth used to grasp and chew food and as weapons of attack and defense. In mammals and many other vertebrates, the teeth are set in sockets in the jaw. In fish and amphibians, they grow in and around the palate. See also dentition.2. A similar structure in certain invertebrate animals.

tooth


Past participle: toothed
Gerund: toothing
Imperative
tooth
tooth
Present
I tooth
you tooth
he/she/it tooths
we tooth
you tooth
they tooth
Preterite
I toothed
you toothed
he/she/it toothed
we toothed
you toothed
they toothed
Present Continuous
I am toothing
you are toothing
he/she/it is toothing
we are toothing
you are toothing
they are toothing
Present Perfect
I have toothed
you have toothed
he/she/it has toothed
we have toothed
you have toothed
they have toothed
Past Continuous
I was toothing
you were toothing
he/she/it was toothing
we were toothing
you were toothing
they were toothing
Past Perfect
I had toothed
you had toothed
he/she/it had toothed
we had toothed
you had toothed
they had toothed
Future
I will tooth
you will tooth
he/she/it will tooth
we will tooth
you will tooth
they will tooth
Future Perfect
I will have toothed
you will have toothed
he/she/it will have toothed
we will have toothed
you will have toothed
they will have toothed
Future Continuous
I will be toothing
you will be toothing
he/she/it will be toothing
we will be toothing
you will be toothing
they will be toothing
Present Perfect Continuous
I have been toothing
you have been toothing
he/she/it has been toothing
we have been toothing
you have been toothing
they have been toothing
Future Perfect Continuous
I will have been toothing
you will have been toothing
he/she/it will have been toothing
we will have been toothing
you will have been toothing
they will have been toothing
Past Perfect Continuous
I had been toothing
you had been toothing
he/she/it had been toothing
we had been toothing
you had been toothing
they had been toothing
Conditional
I would tooth
you would tooth
he/she/it would tooth
we would tooth
you would tooth
they would tooth
Past Conditional
I would have toothed
you would have toothed
he/she/it would have toothed
we would have toothed
you would have toothed
they would have toothed
Thesaurus
Noun1.tooth - hard bonelike structures in the jaws of vertebratestooth - hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defensefang - hollow or grooved tooth of a venomous snake; used to inject its poisontusk - a long pointed tooth specialized for fighting or digging; especially in an elephant or walrus or hogconodont - the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodontabone, os - rigid connective tissue that makes up the skeleton of vertebratesdentin, dentine - bone (calcified tissue) surrounding the pulp cavity of a toothteeth, dentition - the kind and number and arrangement of teeth (collectively) in a person or animalpulp cavity - the central cavity of a tooth containing the pulp (including the root canal)pearly, chopper - informal terms for a human `tooth'carnassial tooth - the last upper premolar and first lower molar teeth of a carnivore; having sharp edges for cutting fleshanterior, front tooth - a tooth situated at the front of the mouth; "his malocclusion was caused by malposed anteriors"back tooth, posterior - a tooth situated at the back of the mouthmalposed tooth - a tooth that has grown in a faulty positionadult tooth, permanent tooth - any of the 32 teeth that replace the deciduous teeth of early childhood and (with luck) can last until old agebaby tooth, deciduous tooth, milk tooth, primary tooth - one of the first temporary teeth of a young mammal (one of 20 in children)canine, canine tooth, cuspid, eye tooth, eyetooth, dogtooth - one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolarsbicuspid, premolar - a tooth having two cusps or points; located between the incisors and the molarscusp - small elevation on the grinding surface of a toothincisor - a tooth for cutting or gnawing; located in the front of the mouth in both jawsmolar, grinder - grinding tooth with a broad crown; located behind the premolarscrown - the part of a tooth above the gum that is covered with enameltooth root, root - the part of a tooth that is embedded in the jaw and serves as supportpulp - the soft inner part of a toothstump - the part of a limb or tooth that remains after the rest is removed
2.tooth - something resembling the tooth of an animaltooth - something resembling the tooth of an animalcog, sprocket - tooth on the rim of gear wheelcomb - a flat device with narrow pointed teeth on one edge; disentangles or arranges haircomb - any of several tools for straightening fiberspower saw, sawing machine, saw - a power tool for cutting woodprojection - any structure that branches out from a central supportsaw - hand tool having a toothed blade for cutting
3.tooth - toothlike structure in invertebrates found in the mouth or alimentary canal or on a shelltooth - toothlike structure in invertebrates found in the mouth or alimentary canal or on a shelldenticle - small pointed ridge on the exoskeleton of an arthropodanatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"
4.tooth - a means of enforcementtooth - a means of enforcement; "the treaty had no teeth in it"means, way, agency - how a result is obtained or an end is achieved; "a means of control"; "an example is the best agency of instruction"; "the true way to success"
5.tooth - one of a number of uniform projections on a geartooth - one of a number of uniform projections on a gearcogwheel, gear, gear wheel, geared wheel - a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motionprojection - any structure that branches out from a central support

tooth

nounRelated words
adjective dental
fear odontophobia

Teeth

canine, incisor or foretooth, molar, premolar, wisdom tooth
Translations
齿牙牙齿

tooth

(tuːθ) nounplural teeth (tiːθ) 1. any of the hard, bone-like objects that grow in the mouth and are used for biting and chewing. He has had a tooth out at the dentist's. 牙齒 牙齿2. something that looks or acts like a tooth. the teeth of a comb/saw.齿teethe (tiːð) verb (of a baby) to grow one's first teeth. He cries a lot because he's teething. 生乳牙,長牙齒 生乳牙,长牙齿 toothed adjective having teeth. a toothed wheel. 有齒的,鋸齒狀的 有齿的,锯齿状的 ˈtoothless adjective without teeth. a toothless old woman. 無牙齒的 无牙的ˈtoothy adjective showing a lot of teeth. a toothy grin. 露齒的 露齿的ˈtoothache noun a pain in a tooth. He has / is suffering from toothache. 牙疼 牙疼ˈtoothbrush noun a brush for cleaning the teeth. 牙刷 牙刷ˈtoothpaste noun a kind of paste used to clean the teeth. a tube of toothpaste. 牙膏 牙膏ˈtoothpick noun a small piece of wood, plastic etc for picking out food etc from between the teeth. 牙籤 牙签be/get etc long in the tooth (of a person or animal) to be, become etc, old. I'm getting a bit long in the tooth to climb mountains. 年紀大 年迈的,年老的 a fine-tooth comb a comb with the teeth set close together, for removing lice, dirt etc from hair etc. 細齒梳子 篦子a sweet tooth a liking for sweet food. My friend has a sweet tooth. 愛吃甜食 爱吃甜食tooth and nail fiercely and with all one's strength. They fought tooth and nail. 竭盡全力地 竭尽全力地

tooth

牙zhCN, 齿zhCN
  • This tooth hurts → 这颗牙很疼
  • I've broken a tooth → 我打碎了一颗牙

tooth


See:
  • (as) clean as a hound's tooth
  • (as) rare as hens' teeth
  • (as) scarce as hens' teeth
  • a fine-tooth comb
  • a sweet tooth
  • an eye for an eye and a tooth for a tooth
  • an eye for an eye, a tooth for a tooth
  • be long in the tooth
  • clean as a hound's tooth
  • cut a tooth
  • fight hammer and tongs
  • fight tooth and claw
  • fight tooth and nail
  • fine-tooth comb
  • fine-tooth comb, to go over with a
  • go at each other tooth and nail
  • go at it tooth and nail
  • go at one another tooth and nail
  • go over (something) with a fine-tooth comb
  • go over with a fine-tooth comb
  • go over/through something with a fine-tooth comb
  • go through (something) with a fine-tooth comb
  • have a sweet tooth
  • hen's tooth
  • long in the tooth
  • love-tooth in the head
  • rarer than hens' teeth
  • red in tooth and claw
  • scarcer than hens' teeth
  • sweet tooth
  • sweet tooth, (to have) a
  • take the bear by the tooth
  • tooth and nail
  • tooth and nail, fight/with
  • tooth fairy
  • with a fine-tooth comb

tooth


tooth:

see teethteeth,
hard, calcified structures embedded in the bone of the jaws of vertebrates that perform the primary function of mastication. Humans and most other mammals have a temporary set of teeth, the deciduous, or milk, teeth; in humans, they usually erupt between the 6th and 24th
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.

Tooth

One of the structures found in the mouth of most vertebrates which, in their most primitive form, were conical and were usually used for seizing, cutting up, or chewing food, or for all three of these purposes. The basic tissues that make up the vertebrate tooth are enamel, dentin, cementum, and pulp (see illustration).

Structure of a toothStructure of a tooth

Enamel is the hardest tissue in the body because of the very high concentration, about 96%, of mineral salts. The remaining 4% is water and organic matter. The enamel has no nerve supply, although it is nourished to a very slight degree from the dentin it surrounds. The fine, microscopic hexagonal rods (prisms) of apatite which make up the enamel are held together by a cementing substance.

Dentin, a very bonelike tissue, makes up the bulk of a tooth, consisting of 70% of such inorganic material as calcium and phosphorus, and 30% of water and organic matter, principally collagen. The rich nerve supply makes dentin a highly sensitive tissue; this sensitivity serves no obvious physiological function.

Cement is a calcified tissue, a type of modified bone less hard than dentin, which fastens the roots of teeth to the alveolus, the bony socket into which the tooth is implanted. A miscellaneous tissue, consisting of nerves, fibrous tissue, lymph, and blood vessels, known as the pulp, occupies the cavity of the tooth surrounded by dentin.

The dentition of therian mammals, at least primitively, consists of four different kinds of teeth. The incisors (I) are usually used for nipping and grasping; the canines (C) serve for stabbing or piercing; the premolars (Pm) grasp, slice, or function as additional molars; and the molars (M) do the chewing, cutting, and grinding of the food. Primitively the placentals have 40 teeth and the marsupials 50.

In therian mammals, probably because of the intricacies and vital importance of tooth occlusion, only part of the first (or “milk”) dentition is replaced. This second, or permanent, dentition is made up of incisors, canines, and premolars; as a rule only one premolar is replaced in marsupials. Although the molars erupt late in development and are permanent, that is, not replaced, they are part of the first, or deciduous, dentition.

tooth

One of a series of carved ornaments, typically a pyramidal shape or a four-petal flower, usually set in a concave molding band; used in the Romanesque and Gothic Revival styles. See also: ornament

tooth

[′tüth] (anatomy) One of the hard bony structures supported by the jaws in mammals and by other bones of the mouth and pharynx in lower vertebrates serving principally for prehension and mastication. (design engineering) One of the regular projections on the edge or face of a gear wheel. An angular projection on a tool or other implement, such as a rake, saw, or comb. (graphic arts) The coarse or abrasive quality of a paper or a painting ground that assists in the application of charcoal, pastels, or paint. A paper texture that holds ink more readily. (invertebrate zoology) Any of various sharp, horny, chitinous, or calcareous processes on or about any part of an invertebrate that functions like or resembles vertebrate jaws.

tooth

1. In a paint film, a fine texture imparted either by pigments or by the abrasives used in sanding; this texture provides a good base for the adhesion of a subsequent coat of paint. 2. A dogtooth, 2.

tooth

1. any of various bonelike structures set in the jaws of most vertebrates and modified, according to the species, for biting, tearing, or chewing 2. any of various similar structures in invertebrates, occurring in the mouth or alimentary canal 3. any of the various small indentations occurring on the margin of a leaf, petal, etc. 4. any one of a number of uniform projections on a gear, sprocket, rack, etc., by which drive is transmitted

tooth


tooth

 [to̳th] (pl. teeth) one of the small bonelike structures of the jaws for biting and mastication of food; they also help in the shaping of sounds and forming of words in speech.
Structure. The portion of a tooth that rises above the gum is the crown; the portion below is the root. The crown is covered by enamel, which is related to the epithelial tissue of the skin and is the hardest substance in the human body. The surface of the root is composed of a bonelike tissue called cementum. Underneath the surface enamel and cementum is a substance called dentin, which makes up the main body of the tooth. Within the dentin, in a space in the center of the tooth, is the pulp" >dental pulp, a soft, sensitive tissue that contains nerves and blood and lymph vessels. The cementum, dentin, and pulp are formed from connective tissue. Typical deciduous teeth.Typical permanent teeth.(See color plates.)
Covering the root of the tooth and holding it in place in its alveolus (socket) in the jaw is a fibrous connective tissue called the periodontium. Its many strong fibers are embedded in the cementum and also the wall of the tooth socket. The periodontium not only helps hold the tooth in place but also acts to cushion it against the pressure caused by biting and chewing.
There are 20 primary teeth, called also deciduous teeth, baby teeth, or milk teeth, which are eventually replaced by 32 permanent teeth, evenly divided between the upper and lower jaws.
Teeth have different shapes because they have different functions. The incisors, in the front of the mouth, are shaped like a cone with a sharp flattened end, and cut the food. There are eight deciduous and permanent incisors, four upper and four lower. The canines (or cuspids) are at the corners of the mouth and are shaped like simple cones; they tear and shred food. There are four permanent canines; the two in the upper jaw are popularly known as the “eye teeth.” The premolars (or bicuspids) are next behind the cuspids and consist of two cones, or cusps, fused together; they tear, crush, and grind the food. There are eight permanent premolars. The molars are in the back of the mouth; they have between three and five cusps each, and their function is to crush and grind food. There are 12 permanent molars in all, three on each side of both the upper and lower jaw. The hindmost molar in each of these groups, and the last one to emerge, is popularly known as the wisdom tooth.Development and Eruption. Both the primary teeth and the permanent teeth begin to develop before birth. Because of this, it is vitally important that expectant mothers receive foods that will supply the calcium, phosphorus, and vitamins necessary for healthy teeth. The primary teeth begin to form about the sixth week of prenatal life, with calcification beginning about the sixteenth week. A considerable part of the crowns of these teeth is formed by the time the child is born. Eruption, or cutting of teeth, is slower in some children than others, but the primary teeth generally begin to appear when the infant is between 6 and 9 months of age, and the process is completed by the age of 2 to 2½ years.

When the child is about 6, the first permanent molar comes in just behind the second molar of the primary teeth. About the same time, shedding of primary teeth begins. The permanent teeth form in the jaw even before the primary ones have erupted, with the incisors and the canines beginning to calcify during the first 6 months of life. Calcification of the others takes place shortly after. As the adult teeth calcify, the roots of the primary ones gradually disappear, or resorb, and are completely gone by the time the permanent teeth are ready to appear. Occasionally a primary tooth root does not resorb, and as a result the permanent tooth comes in outside its proper position. When this happens, it is necessary to remove the primary tooth and root.
The first teeth to be shed, about the sixth year, are the central incisors. The permanent incisors erupt shortly afterward. The lateral incisors are lost and replaced during the seventh to ninth years, and the canines in the ninth to twelfth years. The first premolars generally appear between the ages of 10 and 12, the second molars between 11 and 13, and the third molars, or wisdom teeth, between 17 and 22. It is not uncommon for the third molars to fail to erupt.
Occasionally there is a partial or total lack of either the primary or the permanent teeth (anodontia). In some cases this is inherited, and in others it may be related to endocrine gland disturbances.
Tooth Decay and Its Prevention. Tooth decay, or dental caries, is the most common disease in the United States. It begins on the outside of the teeth in the enamel as bacteria and refined carbohydrates adhere to the tooth surface to form plaque. The action of the bacteria on starchy and sugary foods produces lactic acid, which is believed to dissolve the enamel. Once there is a break in the enamel (demineralization), the decaying process moves on into the dentin and then to the pulp, attacking the nerves and causing toothache. For methods of treatment and prevention, see dental caries.
accessional teeth the permanent molars, so called because they have no primary tooth predecessors in the dental arch. See also succedaneous teeth.anterior teeth the teeth in the anterior parts of the dental arches; the incisors and canines.avulsed tooth a tooth that has been traumatically dislocated, usually salvageable for a reimplantation if appropriate treatment is initiated promptly. Prior to treatment the tooth can be placed in the conscious patient's mouth or in ice water or cold milk. No attempt should be made to cleanse the tooth.Hutchinson's teeth abnormal teeth seen in congenital syphilis" >syphilis, in which the permanent incisors have a screwdriver-like shape, sometimes associated with notching of the incisal edges.impacted tooth one so placed in the jaw that it is unable to erupt or to attain its normal position in occlusion. See also impaction" >dental impaction.intruded tooth a tooth that has been forcefully pushed into the patient's gums and may appear to be absent; it will usually return to the normal position within one month.posterior teeth the teeth in the posterior parts of the dental arches; the premolars and molars.succedaneous teeth (successional teeth) the permanent teeth that have primary tooth predecessors in the dental arch. See also accessional teeth.wisdom tooth the third molar, the tooth most distal to the medial line on either side in each jaw; so called because it is the last of the permanent dentition to erupt, usually at the age of 17 to 21 years.

Tooth

(tūth), Howard H., English neurologist, 1856-1925. See: Charcot-Marie-Tooth disease.

tooth

, pl.

teeth

(tūth, tēth), [TA] One of the hard conic structures set in the alveoli of the upper and lower jaws, used in mastication and assisting in articulation. A tooth is a dermal structure composed of dentin and encased in cementum on the anatomic root and enamel on its anatomic crown. It consists of a root buried in the alveolus, a neck covered by the gum, and a crown, the exposed portion. In the center is the pulp cavity filled with a connective tissue reticulum containing a jellylike substance (dental pulp) and blood vessels and nerves that enter through an aperature or aperatures at the apex of the root. The 20 deciduous teeth or primary teeth appear between the 6th-9th and the 24th months of life; these exfoliate and are replaced by the 32 permanent teeth appearing between the 5th-7th years and the 17th-23rd years. There are four kinds of teeth: incisor, canine, premolar, and molar. Synonym(s): dens (1) [TA] [A.S. tōth]

tooth

(to͞oth)n. pl. teeth (tēth) 1. One of a set of hard, bonelike structures in the mouths of humans and other vertebrate animals, usually attached to the jaw or rooted in sockets and typically composed of a core of soft pulp surrounded by a layer of hard dentin that is coated with cementum or enamel at the crown and used for biting or chewing food.2. A similar hard projection in an invertebrate.3. A projecting part resembling a tooth in shape or function, as on a comb, gear, or saw.

tooth

, pl. teeth (tūth, tēth) [TA] One of the hard conic structures set in the alveoli of the upper and lower jaws, used in mastication and assisting in articulation. A tooth is a dermal structure composed of dentin and encased in cementum on the anatomic root and enamel on its anatomic crown. It consists of a root buried in the alveolus, a neck covered by the gum, and a crown, the exposed portion. In the center is the pulp cavity, filled with a connective tissue reticulum containing a jellylike substance, blood vessels, and nerves that enter through a canal at the apex of the root. The 20 deciduous teeth, or primary teeth, appear between the 6th and 9th through the 24th month of life; these exfoliate and are replaced by the 32 permanent teeth, appearing between the 5th and 7th years through the 17th to 23rd years. There are four kinds of teeth: incisor, canine, premolar, and molar.
Synonym(s): dens (1) [TA] .
[A.S. tōth]

tooth

(tooth) (teth) plural.teethSTRUCTURE OF A TOOTH: (longitudinal section)Any of the hard, bony conical structures of the upper and lower jaws used for chewing. A tooth consists of a crown portion above the gum, a root portion embedded in a socket (alveolus) of the jaw bone, and a neck or cervical constricted region between the crown and root. The soft-tissue gingiva covers the neck and root to a variable extent, depending on age and oral hygiene. The major portion of a tooth consists of dentin, which is harder than bone; enamel; and cementum, which is similar to bone. The pulp cavity contains the dental pulp. Each tooth has five surfaces: occlusal, mesial, distal, lingual, and facial or buccal. See: illustration; dentition

Everyone has two complete sets of teeth during his life. The 20 primary teeth are the first set of teeth a person develops. They exfoliate by age 14 and are replaced by the 32 permanent teeth. The permanent teeth include the following: incisors, canines (cuspids), premolars (bicuspids), and molars. On average, a child should have 6 teeth at 1 year, 12 teeth at 18 months, 16 teeth at 2 years, and 20 teeth at 12 years. Some children are born with a few erupted teeth; in other children the teeth may not appear until 16 months.

Patient care

Health care professionals should assess patients’ teeth and gums during physical examinations, educate patients about routine dental hygiene (brushing, flossing, gum stimulation, use of oral rinses), and refer them to a dental professional for dental caries, eruption anomalies, or periodontal problems.

See: dental plaque; periodontal disease

accessional tooth

A permanent molar tooth that arises without deciduous predecessors in the dental arch.

anterior tooth

The central and lateral incisors and/or the canines, located adjacent to the midline of the maxilla or mandible.

baby tooth

Deciduous tooth.

bicuspid tooth

A permanent, premolar tooth. There are eight premolars, two in each quadrant (four in each jaw) between the canines and molars. Premolars have two or three cusps on the occlusal surface.

bull tooth

Taurodontism.

cracked tooth

A tooth whose enamel and dentin are fractured. DECIDUOUS TEETH (LEFT SIDE)

deciduous tooth

Any of the 20 teeth that make up the primary dentition, which are shed and replaced by the permanent teeth. Synonym: baby tooth; milk tooth; primary tooth See: illustration

hypersensitive tooth

A tooth sensitive to temperature changes, sweets, or percussion. It may exhibit gingival recession, exposed root dentin, caries, or periodontal disease.

Treatment

Popular treatments for hypersensitivity include topical varnishes, sealants, and topical fluoride applications. Other treatments include application of silver nitrate, formalin, glycerin, strontium chloride, potassium nitrate, calcium compounds, sodium citrate, and potassium oxalate.

Patient care

The patient can reduce sensitivity by a regimen of plaque control, dentifrice with fluoride, self-applied fluoride, and control of diet.

impacted tooth

A tooth unable to erupt due to crowding by adjacent teeth, malposition of the tooth, or developmental disturbances.

malacotic tooth

A tooth soft in structure, white in color, and esp. prone to decay.

milk tooth

Deciduous tooth.

permanent tooth

Any of the 32 teeth that develop as the second dentition and replace the deciduous teeth. Synonym: secondary tooth See: deciduous tooth for illus

primary tooth

Deciduous tooth.

sclerotic tooth

A yellowish tooth that is naturally hard and highly resistant to caries.

secondary tooth

Permanent tooth.

succedaneous tooth

In dentistry, a permanent tooth that succeeds (replaces) a normally erupted deciduous tooth. It includes the premanent incisors, cuspids, and premolars. The deciduous molars are replaced by the permanent premolars, which are not succedaneous teeth.

wisdom tooth

Any of the third most-distal molars on each side of both jaws. These four molars may appear as late as the 25th year or may never erupt.

tooth

See TEETH.
ToothFig. 298 Tooth . Vertical section of a human molar.

tooth

  1. one of a series of structures found in the mouth of vertebrates associated with the biting, tearing and crushing of food. Each tooth is a hard structure consisting of a very hard external enamel layer of minerals bound by KERATIN. Underneath this is dentine which has a similar structure to the bone, but is harder, again due to mineral content. The dentine is perforated by fine channels containing processes of the odontoblasts (tooth cells). Centrally the pulp cavity contains blood capillaries and nerve endings. The root is covered by cement and embedded in the jaw bone. See Fig. 298 . See INCISORS, CANINES, PREMOLARS and MOLARS.
  2. any structure with the general appearance of a tooth, such as a dogfish tooth (denticle) which is a modified scale.

tooth

, pl. teeth (tūth, tēth) [TA] One of the hard conic structures set in alveoli of upper and lower jaws used in mastication and assisting in articulation; dermal structure composed of dentin and encased in cementum on anatomic root and enamel on anatomic crown. It consists of a root buried in the alveolus, a neck covered by gum, and a crown, the exposed portion. In the center, pulp cavity is filled with a connective tissue reticulum containing a jellylike substance (dental pulp) and blood vessels and nerves that enter through one or more apertures at the apex of the root. The 20 deciduous teeth or primary teeth appear between the 6th-9th and 24th months of life; these exfoliate and are replaced by 32 permanent teeth appearing between 5th-7th years and 17th-23rd years. There are four kinds of teeth: incisor, canine, premolar, and molar.
Synonym(s): dens (1) [TA] .
[A.S. tōth]

Patient discussion about tooth

Q. what exactly is a tooth fracture?A broken tooth? there is a tremendous amount of pain with this tooth.A. I had a temp that stayed on for a month because I couldn't mek it back to the dentist for a awhile. I used to have a Obsession with Jaw Breaker candy but with 2 crowns learned my lesson.
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az cosmetic dentistry

Q. do you know what are the pros and cons of the Sonic toothbrush from Oral B (electric tooth brush)? last night, my best friend raved about it for a whole hour. My dentist told me to use a soft brush (number 35) to clean my teeth and that the electric brushes are a bit over rated. My friend specifically told me about the Sonic product and told me that it also makes his teeth whiter. I wanted to know if anybody has any knowledge or experience from first hand about this product or any good information about it.A. Thank you for the frank answer. I wonder if I can find a really soft electric toothbrush

Q. what happens if a dentist fills a cavity with some caries left on the tooth? the cavity was deep ,close to the nerve. Didn’t make nerve exposure.?A. If it wasn’t removed properly – you will have what they call – “recurrent cries”. It’ll continue growing without you seeing it until you’ll come back to the dentist again because of the pain. I suggest you’ll save the pain part and go now.

More discussions about tooth
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Tooth


Tooth

Describing paper with rough texture, which makes the paper able to receive ink more easily.
AcronymsSee2TH

tooth


Related to tooth: toothache, Tooth abscess
  • noun

Words related to tooth

noun hard bonelike structures in the jaws of vertebrates

Related Words

  • fang
  • tusk
  • conodont
  • bone
  • os
  • dentin
  • dentine
  • teeth
  • dentition
  • pulp cavity
  • pearly
  • chopper
  • carnassial tooth
  • anterior
  • front tooth
  • back tooth
  • posterior
  • malposed tooth
  • adult tooth
  • permanent tooth
  • baby tooth
  • deciduous tooth
  • milk tooth
  • primary tooth
  • canine
  • canine tooth
  • cuspid
  • eye tooth
  • eyetooth
  • dogtooth
  • bicuspid
  • premolar
  • cusp
  • incisor
  • molar
  • grinder
  • crown
  • tooth root
  • root
  • pulp
  • stump

noun something resembling the tooth of an animal

Related Words

  • cog
  • sprocket
  • comb
  • power saw
  • sawing machine
  • saw
  • projection

noun toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell

Related Words

  • denticle
  • anatomical structure
  • bodily structure
  • body structure
  • complex body part
  • structure

noun a means of enforcement

Related Words

  • means
  • way
  • agency

noun one of a number of uniform projections on a gear

Related Words

  • cogwheel
  • gear
  • gear wheel
  • geared wheel
  • projection
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