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Topic: Tooth development

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	9.1MechanismsofToothEruption
		Tooth eruption is traditionally considered to be a developmental process whereby the tooth moves in an axial direction from its location within the alveolar crypt of the jaw into a functional position within the oral cavity.
		Thus, it appears that tooth eruption is a localized, bilaterally symmetrical event in alveolar bone that is regulated by the dental follicle proper, a derivative of cranial ectomesenchyme (neural crest).
		The challenge of the intraosseous stage of tooth eruption is to escape from the bone surrounding the crown and to redirect the growth of the alveolar bone proper to surround and support a developing root.
	www.uic.edu /classes/osci/osci590/9_1Mechanisms.htm (2284 words)

	Teeth - MSN Encarta
		Third molars are often called wisdom teeth; they developed thousands of years ago when human diets consisted of mostly raw and unprocessed foods that required the extra chewing and grinding power of a third set of molars.
		Front tooth enamel, for example, is usually complete around one month after birth, while the enamel on the second molars is not completely developed until a child is about a year and a half old.
		The final stage of tooth development is root completion, a slow process that continues until the child is more than three years old.
	encarta.msn.com /encyclopedia_761561931/Teeth.html (1111 words)

	Tooth Development in Babies and Children
		The first tooth usually erupts through the gum by the 6th to 7th month, but some children may not get their first tooth until after the age of 12 months.
		As soon a teeth develop they should be cleaned daily with a wet gauze or wash cloth.
		Review proper tooth brushing techniques with your dentist, and be sure that your child can brush properly before allowing him/her to brush on their own.
	www.drpaul.com /growth/tooth.html (785 words)

	Tooth development - Wikipedia, the free encyclopedia
		Tooth development is the complex process by which teeth form from embryonic cells, grow, and erupt into the mouth.
		The enamel organ is composed of the outer enamel epithelium, inner enamel epithelium, stellate reticulum and stratum intermedium.
		Cysts or tumors adjacent to a tooth bud are forces known to cause dilaceration, as are primary (baby) teeth pushed upward by trauma into the gingiva where it moves the tooth bud of the permanent tooth.
	en.wikipedia.org /wiki/Tooth_development (4837 words)

	Oral Histology
		Dental development includes the formation of specific number of teeth which in humans have different shapes and are located in defined positions in the maxillary and mandibular dental arches.
		During the early crown stage the interaction between the inner dental epithelium and the surface cells of the ectomesenchymal dental papilla leads to the differentiation of the enamel forming cells, the ameloblasts and the dentin forming cells, the odontoblasts.
		Thus the temporal sequence (time of development) is crucial in deciding whether odontogenic epithelium or dental papilla mesenchyme determines the type of developing tooth.
	dentistry.uic.edu /Depts/oralb/ZHistologic.htm (2017 words)

	Jaws: Cysts and Odontogenic Tumors
		Epithelium is present at all stages in tooth development and covers the external surfaces of the crown until the tooth erupts into the mouth.
		Because dentigerous cysts develop after the tooth crown is completed, it is assumed they arise in the late stages of tooth development.
		In the ameloblastoma it is sparse and composed mainly of collagen fibers; in the ameloblastic fibroma it resembles the dental papilla of early tooth development.
	www.usc.edu /hsc/dental/PTHL312abc/312b/10/Reader/reader.html (7211 words)

	Tooth anatomy, teeth
		Development of permanent teeth Anatomy and development of the mouth and teeth, enamel - the outer layer of the tooth, dentin - the inner layer and the main part of the tooth, pulp - part of the inside of the tooth that contains the nerve, root,...
		Tooth anatomy pulp, root, dentin, crown, enemel, gums, cementum, Anatomy and development of the mouth and teeth
		Tooth development Tooth development is the complex process by which teeth form from embryonic cells, grow, and erupt into the mouth,...
	www.educypedia.be /education/toothanatomy.htm (508 words)

	Impacted Tooth Information on Healthline
		An impacted tooth is any tooth that is prevented from reaching its normal position in the mouth by tissue, bone, or another tooth.
		Less common symptoms of an impacted tooth are swollen lymph nodes in the neck, difficulty opening the mouth, and prolonged headache.
		The tooth may have to be removed in pieces to minimize destruction to the surrounding structures.
	www.healthline.com /galecontent/impacted-tooth (632 words)

	Int. J. Dev. Biol. - Growth factors and tooth development.
		ABSTRACT The effects of various growth factors on tooth development were studied in organ cultures of mouse embryonic tooth germs.
		Transferrin was required for the development of bud- and early cap-staged teeth, and it was shown to be the only serum protein that was needed by early cap-staged teeth in organ culture.
		The roles of polypeptide growth factors in tooth development were studied by adding these factors to the transferrin-containing chemically-defined culture medium which supports early tooth morphogenesis and cell differentiation.
	www.ijdb.ehu.es /web/paper.php?doi=2485697 (245 words)

	AGD - Does my dentist play a role in my child's tooth development?
		If a baby tooth is knocked out, see your dentist, who may recommend a space maintainer to reserve the gap until the permanent tooth comes in.
		In instances where a primary tooth is loose because of the emergence of a permanent tooth, have the child wiggle the tooth or eat something hard, such as an apple to help it along.
		Once the shell of the tooth is disconnected from the root, the discomfort in extracting a loose primary tooth is minimal.
	www.agd.org /consumer/topics/tootherupt/main.asp (751 words)

	Anatomy and Development of the Mouth and Teeth - Lucile Packard Children's Hospital
		Good nutrition from the mother during pregnancy is important in the development of the teeth.
		The first tooth to erupt is usually a middle, front tooth on the lower jaw, known as the central incisor.
		The last baby tooth is usually lost around the age of 12, and is the cuspid or second molar.
	www.lpch.org /DiseaseHealthInfo/HealthLibrary/dental/teethanat.html (533 words)

	Research - Peridontium
		During late stages of tooth development, the developing periodontium is a highly dynamic environment.
		(i) Between the erupting tooth crown and the regional oral mucosa, the coronal segment of the alveolar bone crypt is reduced by osteoclasts to facilitate tooth crown eruption (Figure 2).
		This figure illustrates the growth of the tooth root in apical direction (A-C) and the reduction of the alveolar bone crypt prior to tooth eruption (F-G).
	dentistry.uic.edu /CraniofacialGenetics/ResearchDOP.html (674 words)

	UNSW Embryology- Integumentary Development - Tooth
		Growth factors in the BMP- and FGF-families are expressed in dental epithelium during initiation of tooth development and their effects on the underlying mesenchyme mimic those of the epithelium.
		During subsequent morphogenesis, when the characteristic shapes of individual teeth develop as a result from folding of the dental epithelium, several signal molecules including Sonic hedgehog, Bmps-2, 4, 7 and Fgf-4 are expressed specifically in restricted and transient epithelial cell clusters, called enamel knots.
		In contrast to the Notch family receptors and their ligand Jagged1, expression of Delta1 in the tooth germ is not affected by epithelial-mesenchymal interactions, showing that the Notch receptors and their two ligands Jagged1 and Delta1 are subject to different regulations.
	embryology.med.unsw.edu.au /Notes/skin4a.htm (531 words)

	Tooth Development, Permanent Information on Healthline
		The development of both primary and permanent teeth starts long before these teeth are visible.
		When a child is born, the primary teeth are partially formed, and development of permanent teeth has started in the jaw bone.
		A delay in the development process of two years or more could be a symptom of hormonal deficiencies.
	www.healthline.com /galecontent/tooth-development-permanent (789 words)

	OccDentDev.html
		The size of the teeth and the timing of the developing dentition and its eruption are genetically determined.
		One further comment on this issue: tooth development and general physical development are rather independent of one another.
		-At birth, bulges in the developing alveoli precede eruption of the deciduous teeth.
	www.uic.edu /classes/orla/orla312/OCCREVIS.htm (2695 words)

	Tooth Development (Site not responding. Last check: 2007-10-13)
		The gum may become red and swollen and the cheeks may be warm and red in the area in which the tooth is coming out.
		To neglect baby teeth is to invite a lifetime of dental problems, because as a child matures, the baby teeth guide the growth and development of the jawbones and of the permanent teeth.
		If the primary teeth are lost too early, the jaw may not develop correctly and the permanent teeth may come in crooked or overcrowded.
	www.innerbody.com /text/skel09.html (323 words)

	Nutritional Factors in Tooth Development and Maintenance - 7
		Table II describes the potential effects of specific nutrient imbalances on tooth development and salivary flow and composition.
		Once teeth have erupted, diet and nutrient intake continue to affect permanent tooth development and mineralization, enamel development and strength, as well as the timing of eruption of the remaining teeth.
		During tooth development, fluoride is incorporated into the pre-eruptive tooth’s mineralized structure, along with calcium and phosphorus to form fluorapatite, a compound more resistant to erosion than hydroxyapatite.
	www.adha.org /CE_courses/course7/nutritional_factors.htm (660 words)

	Dental Assistant Dental Oral Care Dental Hygienist Tooth Development Veterinary Assistant Periodontal Ligament (Site not responding. Last check: 2007-10-13)
		The form teeth take and their mode of development in a species is called the species' dentition.
		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 "buccal" (meaning towards the cheek).
		In the future, tooth decay may be banished by treatment with a genetically modified bacterium, according to research at the University of Florida.
	www.livemedinfo.com /Tooth.htm (1922 words)

	Fluoride and Water
		Tooth decay occurs when bacteria - found in the plaque that dentists try so hard to get rid of - break down sugars in food.
		Though fluoride benefits adults, it is especially critical to the health of developing teeth in children.
		The NIH believes that the dramatic reductions in tooth decay in the past 30 years are due to fluoridation of the water supply, and parents and health professionals should continue to ensure that kids receive enough fluoride to prevent cavities.
	kidshealth.org /parent/growth/feeding/fluoride.html (1444 words)

	Loose tooth after injury
		A two to three week "wait and see" period is a good approach for now, unless your daughter begins to complain of pain or you notice signs of infection (redness and/or swelling of the gum tissue in area and, perhaps, a fever).
		The pulpotomy procedure removes the nerve inside the tooth but the tooth is left in place.
		This treatment may not be an alternative if the root of the primary tooth is damaged or if the tooth remains quite loose.
	parenting.ivillage.com /tp/tphealth/0,,3xg0,00.html (299 words)

	Lab Exercises- Developing tooth
		It shows the nasal septum, a lower nasal concha, a portion of the developing maxilla and mandible, and the tongue.
		Very early tooth development can be seen in both the upper and lower jaw on both sides of the mouth.
		This section of a decalcified tooth has a missing crown, because the enamel, with its high content of calcium salts and low content of organic material has been completely dissolved during decalcification.
	cellbio.utmb.edu /microanatomy/digestive/tooth.htm (844 words)

	Opg, Rank, and Rankl in Tooth Development: Co-ordination of Odontogenesis and Osteogenesis -- Ohazama et al. 83 (3): ...
		Retardation of tooth epithelium invagination observed in explants treated with 200 ng/mL (D) and 400 ng/mL (E) of OPG protein.
		TNF signaling via the ligand-receptor pair ectodysplasin and edar controls the function of epithelial signaling centers and is regulated by Wnt and activin during tooth organogenesis.
		Msx1 deficient mice exhibit cleft palate and abnormalities of craniofacial and tooth development.
	jdr.iadrjournals.org /cgi/content/full/83/3/241 (2192 words)

	Primary Tooth Development - Health
		These cells develop into specialized groups, like hematopoietic stem cells, which form blood cells, and neural stem cells, which form nerve cells and nerve tissue.
		When the scientists grew the tooth stem cells in various growth cultures, they produced other kinds of cells, like bone cells, fat cells and neural cells.
		When the tooth falls out, it can be placed in the container with the ice pack and mailed back to the company.
	www.wsoctv.com /health/9809530/detail.html (961 words)

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