tooth (tooth) (teth) plural.teeth
STRUCTURE 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
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.
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
A permanent molar tooth that arises without deciduous predecessors in the dental arch.
The central and lateral incisors and/or the canines, located adjacent to the midline of the maxilla or mandible.
baby toothDeciduous 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.
A tooth whose enamel and dentin are fractured.
DECIDUOUS TEETH (LEFT SIDE)
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
A tooth sensitive to temperature changes, sweets, or percussion. It may exhibit gingival recession, exposed root dentin, caries, or periodontal disease.
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.
The patient can reduce sensitivity by a regimen of plaque control, dentifrice with fluoride, self-applied fluoride, and control of diet.
A tooth unable to erupt due to crowding by adjacent teeth, malposition of the tooth, or developmental disturbances.
A tooth soft in structure, white in color, and esp. prone to decay.
milk toothDeciduous 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 toothDeciduous tooth.
A yellowish tooth that is naturally hard and highly resistant to caries.
secondary toothPermanent 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.
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.
small, bonelike structures of the jaws for the biting and mastication of food. Plural of tooth
. See also dental
see alveolar1 abscess, malar abscess.
the permanent molars, so called because they have no deciduous predecessors in the dental arch.
teeth with a limited period of growth.
usually taken to include incisors and canines.
see deciduous teeth (below).
a type of dentition as seen in humans and pigs; the teeth have short crowns, well developed roots and a narrow root canal. See also hypsodont
the long, pointed tooth in the interdental space between incisors and cheek teeth; there is one in each jaw on both sides.
the temporary set of teeth that erupt in the young and are shed before or near maturity. They have smaller crowns and root systems and are fewer in number than the permanent teeth that replace them. Called also milk teeth, temporary teeth, baby teeth. Occasionally, particularly in small breeds of dogs, shedding of the deciduous tooth may not occur when the permanent replacement has erupted, necessitating veterinary intervention.
Retained deciduous canine tooth in a dog.
displaced molar teeth
see inherited displacement of molar
congenital teeth enamel deficiency teeth eruption time
see Table 19.
teeth excessive wear
occurs in animals on high fluorine intake or on diets low in calcium.
1. grinding of the incisors to improve foraging ability. Has been done to sheep with an industrial angle grinder with indifferent results.
a form of dentition, seen in horses and many ruminants; the crown is high (deep), the root is short.
one so placed in the jaw that it is unable to erupt or to attain its normal position in occlusion.
the front teeth used for cropping grass or rending flesh. From two to four in each quadrant, depending on the species, except that they are missing in the upper jaw of ruminants.
inherited molar teeth displacement
see inherited displacement of molar
cheek teeth with ridged occlusal surfaces. See also lophodont
defective eruption; includes delayed eruption and more usually eruption out of its normal position.
see deciduous teeth (above).
the permanent, primary cheek teeth that are not preceded by premolars. They are typically big teeth used for grinding and with ridges on their occlusal surfaces (lophodont) in horses, worn rounded cusps (bunodont) in pigs, or including crescents (selenodont) in cattle, and either cutting edges or flattened areas in carnivores.
any small sharp teeth in piglets but principally the canine teeth.
caused by staining with porphyrin, or by deficiency of dentine and enamel, a congenital defect.
premature teeth loss
a problem in New Zealand sheep. Characterized by acute then chronic gingivitis, then periodontitis and loss of teeth. Cause unknown.
cheek teeth present in both generations, found between the molars and canines. The first premolar is exceptional in humans because it erupts late and is never replaced. In domestic species, there are up to three or four deciduous, followed by up to four permanent premolars in both jaws and on both sides.
deciduous premolars or incisors may be retained even though the permanent teeth have erupted. The deciduous crowns are likely to protrude at odd angles and cause difficult mastication.
teeth with crescents in their grinding surfaces, as in the cheek teeth of ruminants.
the edges of molar teeth in the horse which require frequent rasping because of the injury that they might cause to the oral mucosa.
red-brown in inherited porphyrinuria in cattle, frequent dosing with tetracyclines, heavy staining with brown tartar in ruminants with a rumination and prehension problem, usually due to loss of anterior part of tongue.
teeth in excess of the normal complement, e.g. double row of incisors. Called also polyodontia, heterotopic polydontia.
see deciduous teeth (above).
Patient discussion about teeth
Q. what would be the best way to protect my teeth from decaying?i fill pain always in my private parties,what prb whenever i take long with out sex,so i would like the advice from my fewwol
A. i fail to see the connection between teeth and groin pain...about the teeth. it's very very simple- get used to a healthy oral hygiene. brush your teeth in the right way twice a day for at least 6 minute. use floss. go to a dental hygienist, she'll guide you through it.
Q. What are wisdom teeth? Why so many people talk about them and suffer from them?
A. Wisdom teeth are the third and final set of molars that most people get in their late teens or early twenties. Sometimes these teeth can be a valuable asset to the mouth when healthy and properly aligned, but more often, they are misaligned and require removal. Wisdom teeth present potential problems when they are misaligned – they can position themselves horizontally, be angled toward or away from the second molars or be angled inward or outward. Poor alignment of wisdom teeth can crowd or damage adjacent teeth, the jawbone, or nerves. Wisdom teeth that lean toward the second molars make those teeth more vulnerable to decay by entrapping plaque and debris. In addition, wisdom teeth can be entrapped completely within the soft tissue and/or the jawbone or only partially break through or erupt through the gum. For complete article: http://www.webmd.com/oral-health/guide/wisdom-teeth This one is good also: http://en.wikipedia.org/wiki/Wisdom_teeth Hope this helps.More discussions about teeth