How many teeth is a human suposed to have?

i think its 32

How many teeth is a human suposed to have?
32
Reply:32 teeth, a person should have.
Reply:32 theeth
Reply:grownup teeeth 32
Reply:32
Reply:thirty two
Reply:a human should have 32 teeth,but up to 22 or 22 years he have 30 teeth,some time people call last to teeth is mature teeth
Reply:Humans grow two sets of teeth. The first set (the %26quot;baby,%26quot; %26quot;milk,%26quot; %26quot;primary%26quot; or %26quot;deciduous%26quot; set) appears at about six months of age, although some babies are born with one or more teeth already visible. This stage is known as teething and can be quite painful for an infant. Human children have 20 milk teeth evenly distributed across the mouth%26#039;s quadrants. Each quadrant of five teeth has a:





central incisor


lateral incisor


cuspid (canine)


first molar


second molar


The second, permanent set of 28 teeth appears (erupts) between the ages of 6 and 12 years in the human dentition. The old set is pushed out of the jaw as the new set erupts. The third molars (the wisdom teeth) are the final teeth to erupt, usually around age 20. However, it is common for the wisdom teeth not to erupt at all; this is often the case in small jaws without room to support the extra teeth. It is possible, though rare, for a person to have fourth molars, and there have been instances where fifth molars have been present in the dentition.








Section of a human molarPermanent teeth are evenly distributed across the mouth%26#039;s quadrants. Each quadrant of eight teeth has a:





central incisor


lateral incisor


cuspid (canine)


first premolar


second premolar


first molar


second molar


third molar (wisdom teeth)


The permanent set may last for life if cared for properly through a regular program of dental hygiene, including regular brushing and professional cleaning by a dentist or hygienist. Teeth that are susceptible to decay may be sealed for complete prevention.





Teeth are attached to the underlying bone of the jaw via the periodontal ligament, though the teeth themselves are not made of bone. The white part of the tooth, which can be seen in the mouth, is the enamel. Immediately one to three mm below the enamel is a slightly softer, yellow tissue called dentin. Dentin is supported by the pulp (commonly called %26#039;the nerve%26#039;, although it contains many other structures which are not nerves), which lies in the center of the tooth. The teeth%26#039;s composition is specialized to resist the harsh environment of the oral cavity and withstand the large forces imposed upon them by mastication, or chewing.





Dentists use several different notation systems to refer to a specific tooth. The three most commons systems are the Universal numbering system, the Palmer Notation Method, and the two-digit FDI World Dental Federation notation which is widely used internationally [2]. Dentists sometimes refer to the inner surface of teeth as the lingual surface (meaning towards the tongue), and the outer surface as the labial surface (meaning towards the lips) or %26quot;buccal%26quot; (meaning towards the cheek). Other terms are mesial (toward the midline), distal (away from the midline), occlusal (the top surface), incisal (the cutting surface), %26quot;gingival%26quot; (toward the gumline), and %26quot;pulpal%26quot; (toward the center).








Tooth decay





Plaque


Main article: Dental plaque


Plaque is a soft white layer which forms on teeth, containing large amounts of bacteria of various types, particularly Streptococcus mutans. Left unchecked for a few days plaque will harden, especially near the gums, forming tartar.





Certain bacteria in the mouth live off the remains of foods, especially sugars. In the absence of oxygen they produce lactic acid, which dissolves the calcium and phosphorus in the enamel in a process known as demineralisation. Enamel demineralisation takes place below the critical pH of about 5.5.





Saliva gradually neutralises the acids which cause the pH of the tooth surface to rise above the critical pH. This causes %26#039;remineralisation%26#039;, the return of the dissolved minerals to the enamel. If there is sufficient time between the intake of foods (two to three hours) then the impact is limited and the teeth can repair themselves.











Caries (Cavities)


Main article: Dental caries


This section should be merged into Dental caries.





Radiographs, or X-rays, can reveal if a person has any cavities and some diseases. Note the fillings (solid white) in this person%26#039;s molars.Caries is a term used to describe the process in which some bacteria produce cavitation of the teeth. This group of bacteria, which are a part of the normal oral flora, have a complex relationship with the host in which they use sugar that the host consumes to metabolize as energy and produce acid which subsequently dissolves the teeth. Caries refers to many, not one, spieces of bacteria including lactobacillus and viridians streptocci, that use ingested carbohydrates for metabolism and produce acid which subsequently dissolves the teeth. Pits and fissures and interproximal smooth surfaces are the most commonly colonized areas of the teeth. Attempts to prevent dental caries involves reducing the factors that cause demineralisation, and increasing the factors leading to remineralisation. Unchecked demineralisation leads to cavities, which may penetrate the underlying dentine to the tooth%26#039;s nerve-rich pulp and lead to toothache.





In moderation, fluoride is known to protect the teeth against cavities. It toughens the teeth by replacing the hydroxyapatite and carbonated hydroxyapatite minerals of which the enamel is made with fluorapatite, which is harder to dissolve by acid. It also reduces the production of acids by bacteria in the mouth by reducing their ability to metabolize sugars. The addition of fluoride (sodium monofluorophosphate) to toothpaste is now very common, and may explain the decline in dental caries in the Western world in the past 76 years.





Some believe that a diet rich in fluorine salts, particularly in childhood, can lead to a stronger enamel which is less susceptible to decay. Fluoridation of drinking water remains a controversial issue. However, in many parts of the world, the natural water supply may be sufficiently rich in fluorides to supply the needs of children without additional sources being required.





Caries is an infectious disease and is treated only by prevention. Once the decay process begins, caries can be eliminated only through the removal of the bacteria. Fluoride can be used to remineralize decalcified enamel, but new tooth structure cannot be regrown. When a patient gets a filling, the dentist mechanically removes the bacterial flora and dead tooth structure and replaces it with a restorative material (metal or glass). This was, traditionally, achieved using gold or a compound of metals called amalgam. Amalgam fillings have been the cause of some public concern because they contain mercury. Modern tooth-colored composite or ceramic are used in addition to traditional amalgam fillings.





As a last resort, teeth affected by caries may be extracted, preferably under local or general anaesthetic. The extracted teeth may be either replaced with a denture or if extracted much before permanent teeth erupts, the space may be maintained by specialized ortho appliances called as Space Maintainers.





Tooth care





Notice the temporary crown, and that the wisdom teeth have been removed.Main article: oral hygiene


Regular brushing is recommended by healthcare professionals twice a day. [3]. Studies show that the minimum required time interval is once every two days; however, more frequent recommended brushing is to help maintain a healthy habit in the population[citation needed]. A mirror may be used to see if the plaque is completely removed during brushing. The actual term %26#039;brushing%26#039; is rather inaccurate. Though a toothbrush is used, it is not designed to deliver mechanical abrasive action. Rather, the surface of the brush is meant to be held at a forty five degree angle to remove plaque from the periodontal margin (the space in between the gum and tooth). Thus, the term %26#039;cleaning teeth%26#039; is far more accurate.





In research, levels of plaque were recorded before and after brushing and found that plaque removal steadily improved as brushing times and pressure were increased. However, their results showed that when people brush for longer than two minutes, at a pressure higher than 150 grams (the weight of an orange), they are not removing any additional plaque, and may be causing permanent damage to the teeth and gums.





Brushing teeth immediately after eating acidic foods is not recommended, because acid softens the enamel, which can then be damaged by brushing. It is better to wait at least half an hour after eating acidic foods before brushing. Rinsing the mouth and eating non-acidic foods can also speed up this process.





Electric toothbrushes are no more effective than the manual variety, according to research. However, %26quot;rotation-oscillation%26quot; electric toothbrushes out-performed manual brushing, removing around 7% more plaque and leading to 17% less gum disease than manual brushes. [4] Any kind of electric toothbrush does tend to help people who are not as good at cleaning their teeth and as a result have had oral hygiene problems.





As noted above, eating certain cheeses such as cheddar soon after eating potentially harmful foods have been noted to be helpful in preventing tooth decay as well.





In the future, tooth decay may be banished by treatment with a genetically modified bacterium, according to research at the University of Florida.





Dentures and %26quot;false%26quot; teeth


In societies that have high sugar diets, tooth decay can damage teeth badly enough that they need to be removed. This leads to the creation of replacement teeth such as dentures and other tooth replacements.





Some of the earliest artificial teeth were made by the Etruscans and their use was adopted in Ancient Rome for the wealthy citizens who often dined on food containing damaging sugars.
Reply:im thinking you are supposed to have 32 teeth.
Reply:By the time you are an adult 32 but there have been notations of some young adults who do not have wisdom teeth (no they have not been pulled they just never developed) and so I%26#039;d say 28 to 32.
Reply:Adult 32 permanent teeth





Child 20 baby (deciduous) teeth
Reply:32 teeth. 4 of them are your wisdom teeth. they can all come out. not come out. or some come out.
Reply:32 is the amount for the average adult on permanent teeth. 16 on the upper and 16 on the lower. Some people can be missing some. Majority of people have wisdom teeth, but not all. Not often, but they can also be missing other teeth. It%26#039;s usually the wisdom teeth that are missing, if any at all.


Children have only 20 primary teeth. 10 upper and 10 lower. Children have no %26#039;premolars%26#039;. those are the teeth behind the %26#039;canine%26#039; tooth. They look like little molars.
Reply:100
Reply:WOW!!! Congratulations to everyone. This is the first time in ages that everyone has given the right answer.





Well, then there%26#039;s kid who%26#039;s messing with us.
Reply:20 baby teeth, aka deciduous dention.


32 adult teeth, aka permanent dention.
Reply:Normally, we all have two sets of teeth, the baby and permanent teeth. There are 20 baby teeth and 32 permanent teeth (28 if you don%26#039;t count the 4 wisdom teeth). Since our permanent teeth if lost cannot grow back make sure you take good care of them.
Reply:32 teeth
Reply:20 baby teeth


32 permanent teeth





Variations from normal occur sometimes.
Reply:32 teeth that is including wisdom teeth. I was born without wisdom teeth so i had 28. i now only have 22 teeth dont ask
Reply:7-8 :)
Reply:32--including %26quot;wisdom teeth%26quot;, which sometimes wind up getting pulled.
Reply:32 but without the wisdoms its 28....... baby teeth is 20
Reply:32



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