Tooth Cervix: The constricted part of the tooth at the junction of the crown and root or roots. It is often referred to as the cementoenamel junction (CEJ), the line at which the cementum covering the root of a tooth and the enamel of the tooth meet. (Jablonski, Dictionary of Dentistry, 1992, p530, p433)Tooth: One of a set of bone-like structures in the mouth used for biting and chewing.Cervix Uteri: The neck portion of the UTERUS between the lower isthmus and the VAGINA forming the cervical canal.Tooth Loss: The failure to retain teeth as a result of disease or injury.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)Tooth, Deciduous: The teeth of the first dentition, which are shed and replaced by the permanent teeth.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 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 Eruption: The emergence of a tooth from within its follicle in the ALVEOLAR PROCESS of the MAXILLA or MANDIBLE into the ORAL CAVITY. (Boucher's Clinical Dental Terminology, 4th ed)Uterine Cervical Neoplasms: Tumors or cancer of the UTERINE CERVIX.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.Tooth Abnormalities: Congenital absence of or defects in structures of the teeth.Tooth Wear: Loss of the tooth substance by chemical or mechanical processesTooth Extraction: The surgical removal of a tooth. (Dorland, 28th ed)Tooth, Nonvital: A tooth from which the dental pulp has been removed or is necrotic. (Boucher, Clinical Dental Terminology, 4th ed)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)Tooth, Impacted: A tooth that is prevented from erupting by a physical barrier, usually other teeth. Impaction may also result from orientation of the tooth in an other than vertical position in the periodontal structures.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)Tooth, Unerupted: A normal developing tooth which has not yet perforated the oral mucosa or one that fails to erupt in the normal sequence or time interval expected for the type of tooth in a given gender, age, or population group.Cervical Ripening: A change in the CERVIX UTERI with respect to its readiness to relax. The cervix normally becomes softer, more flexible, more distensible, and shorter in the final weeks of PREGNANCY. These cervical changes can also be chemically induced (LABOR, INDUCED).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)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).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: Physiologic loss of the primary dentition. (Zwemer, Boucher's Clinical Dental Terminology, 4th ed)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: Two teeth united during development by the union of their tooth germs; the teeth may be joined by the enamel of their crowns, by their root dentin, or by both.Cuspid: The third tooth to the left and to the right of the midline of either jaw, situated between the second INCISOR and the premolar teeth (BICUSPID). (Jablonski, Dictionary of Dentistry, 1992, p817)Tooth DiseasesTooth 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)Bicuspid: One of the eight permanent teeth, two on either side in each jaw, between the canines (CUSPID) and the molars (MOLAR), serving for grinding and crushing food. The upper have two cusps (bicuspid) but the lower have one to three. (Jablonski, Dictionary of Dentistry, 1992, p822)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)Dental Pulp: A richly vascularized and innervated connective tissue of mesodermal origin, contained in the central cavity of a tooth and delimited by the dentin, and having formative, nutritive, sensory, and protective functions. (Jablonski, Dictionary of Dentistry, 1992)Dictionaries, MedicalDictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Dictionaries, ChemicalDental Caries: Localized destruction of the tooth surface initiated by decalcification of the enamel followed by enzymatic lysis of organic structures and leading to cavity formation. If left unchecked, the cavity may penetrate the enamel and dentin and reach the pulp.Fluoridation: Practice of adding fluoride to water for the purpose of preventing tooth decay and cavities.DMF Index: "Decayed, missing and filled teeth," a routinely used statistical concept in dentistry.Pit and Fissure Sealants: Agents used to occlude dental enamel pits and fissures in the prevention of dental caries.Mouthwashes: Solutions for rinsing the mouth, possessing cleansing, germicidal, or palliative properties. (From Boucher's Clinical Dental Terminology, 4th ed)Saliva: The clear, viscous fluid secreted by the SALIVARY GLANDS and mucous glands of the mouth. It contains MUCINS, water, organic salts, and ptylin.Exercise: Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.Nitrate Reductase: An enzyme that catalyzes the oxidation of nitrite to nitrate. It is a cytochrome protein that contains IRON and MOLYBDENUM.Nitrates: Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- radical.Drug Information Services: Services providing pharmaceutic and therapeutic drug information and consultation.Pamphlets: Printed publications usually having a format with no binding and no cover and having fewer than some set number of pages. They are often devoted to a single subject.Drug Labeling: Use of written, printed, or graphic materials upon or accompanying a drug container or wrapper. It includes contents, indications, effects, dosages, routes, methods, frequency and duration of administration, warnings, hazards, contraindications, side effects, precautions, and other relevant information.Patient Education as Topic: The teaching or training of patients concerning their own health needs.Formularies as Topic: Works about lists of drugs or collections of recipes, formulas, and prescriptions for the compounding of medicinal preparations. Formularies differ from PHARMACOPOEIAS in that they are less complete, lacking full descriptions of the drugs, their formulations, analytic composition, chemical properties, etc. In hospitals, formularies list all drugs commonly stocked in the hospital pharmacy.Drug Industry: That segment of commercial enterprise devoted to the design, development, and manufacture of chemical products for use in the diagnosis and treatment of disease, disability, or other dysfunction, or to improve function.Medical Records Systems, Computerized: Computer-based systems for input, storage, display, retrieval, and printing of information contained in a patient's medical record.

Efficacy of dentin bonding to cervical defects. (1/76)

The bonding efficacy of sclerotic dentin was determined by measuring the polymerization contraction gap width of a commercial light-activated resin composite in a cervical defect and by measuring the micro-Vicker's hardness at the dentin adhesive surface; morphological characteristics were observed using a scanning electron microscope in extracted human incisors and premolars. Contraction gap formation was completely prevented when the cavity wall was primed with 35 vol% glyceryl mono-methacrylate solution after 0.5 mol/L EDTA conditioning. The contraction gap width was significantly decreased when the resin composite was filled into the sclerotic dentin cavity even when priming was omitted. These results suggest that the sclerotic dentin, which is frequently observed in cervical defects, should be preserved as a substrate because it exhibits an effect of dentin priming and is suitable for bonding.  (+info)

Anisotropy of tensile strengths of bovine dentin regarding dentinal tubule orientation and location. (2/76)

The purpose of this study was to investigate the effects of the location and orientation of dentinal tubules in the tooth on tensile strengths of the dentin. Dumbbell-shaped specimens of 12 groups from various locations and dentinal tubule orientations were prepared. The tensile test was performed in distilled water at a temperature of 37 degrees C. The tensile strengths of the parallel to the orientation were significantly greater than those of the perpendicular to the orientation; the tensile strengths of the radicular dentin were significantly greater than those of the coronal dentin. Nevertheless, in the radicular dentin, the tensile strengths of the perpendicular to dentinal tubules differ with respect to tensile forces. These results suggest that tensile strength of the dentin varies according to the location and orientation of dentinal tubules in the tooth.  (+info)

Evaluation of adhesive defects using an ultrasonic pulse-reflection technique. (3/76)

The purpose of this study was to examine the application of an ultrasonic pulse-reflection technique for the evaluation of adhesive defects. First, the sonic velocities in the enamel and dentin of human molars and bovine incisors were measured with a pulsar receiver attached to an ultrasonic transducer. The identification of the dentino-enamel junction and pulp-dentin interface using the ultrasonic method based on intrinsic sonic velocities showed good agreement with the actual measured thicknesses. Next, a cemented restoration with artificial faults was prepared. Half of the Au-Ag-Pd alloy plate area was cemented to the dentin slab using luting resin cement. The adhesive interface was evaluated with a high-resolution ultrasonic imaging system. Clear internal faults were evident from the ultrasonic tomogram. The findings of this study suggest that the ultrasonic pulse-reflection technique may be useful for inspecting and imaging structural defects of adhesive interfaces.  (+info)

Educational material of dental anatomy applied to study the morphology of permanent teeth. (4/76)

The purpose of this report is to present educational material that would allow the dental student to learn to easily identify the morphologic characteristics of permanent teeth, and how they fit together (occlusion). In order to do this, macro models of permanent teeth with no attrition were carved in wax and later molded with alginate. These molds were filled with plaster, dental stone and/or cold-cured acrylic resin. The large individual dental stone tooth models were mounted on a wax base, thus obtaining maxillary and mandibular arches which were occluded. These dental arches were molded with plaster or dental stone. The authors suggest that these types of macro models allow an excellent visualization of the morphologic characteristics of permanent teeth and occlusion. Dental students are able to carve the permanent dentition in wax with great facility when they can observe macro models.  (+info)

Anterior tooth morphology and its effect on torque. (5/76)

This study was undertaken to determine the variation in crown-root angle (CRA) of the upper incisors and canines as well as the variation in their labial contour. In addition, the influence of the variability of the labial contour and of different bracket heights on torque was evaluated. Proximal radiographs were taken of 160 extracted maxillary teeth (81 incisors and 79 canines). They were digitized and analysed with Jasc Paint Shop Pro 7TM and Mathcad 2001 Professional. The incisal edge, the centre of the cemento-enamel junction (CEJ), and the root apex were digitized to define the crown and root long axis. For all teeth the CRA was measured. At several heights of the labial surface a tangent was determined, enabling measurement of the inclination of the labial surface. The CRA had great variability, ranging from 167 to 195 degrees for the canines (mean value 183 degrees) and from 171 to 195 degrees for the incisors (average 184 degrees). The mean inclinations of the labial surfaces for the incisors varied greatly. Between 4 and 4.5 mm from the incisal edge the standard deviations (SD) were the smallest and between 2 and 4.5 mm from the incisal edge the labial surface angle differed by approximately 10 degrees. For the canines the mean inclinations of the buccal surface also varied. This angle differed by around 10 degrees between 2 and 4.5 mm from the incisal edge, but the SD were much larger than for the incisors. It can be concluded that placement of a bracket on a tooth at varying heights, still within a clinically acceptable range, results in important differences in the amount of root torque.  (+info)

Influence of cervical preflaring on determination of apical file size in maxillary premolars: SEM analysis. (6/76)

The purpose of this study was to investigate the influence of cervical preflaring on the determination of the first file that binds at working length (WL) in buccal roots of maxillary premolars. Five groups (n=10) were formed at random and, after standard access cavities, the WL was determined 1 mm short from the apex. In group 1, the initial apical file was inserted without preflaring of cervical and middle thirds of the root canals. In groups 2 to 5, the cervical and middle thirds were enlarged with sizes 90 and 110 Gates-Glidden drills, K(3) Orifice Opener instruments, ProTaper instruments and LA Axxess burs, respectively. Canals were sized manually with K-files, starting with No. 08 K-files inserted passively up to the WL. File sizes were increased until a binding sensation was felt at the WL and the size of the instrument was recorded. Transversal sections of the WL regions were examined under scanning electron microscopy and the discrepancies between the canal diameter and first file to bind at the WL were assessed. Significant differences (p<0.001) were found between the groups. The major discrepancy was found without preflaring (mean 157.8 microm). LA Axxess burs produced the smallest discrepancy (mean 0.8 microm). Gates-Glidden drills and K(3) Orifice Opener instruments showed no significant differences (p>0.05) between their results (83.2 microm and 73.6 microm, respectively). The discrepancy for ProTaper instruments was 35.4 microm on average. In conclusion, the instrument binding technique for determination of the anatomical diameter at the WL was not precise. Preflaring of the cervical and middle thirds improved the determination of the anatomical diameter at the WL, and the type of instrument played a major role. Canals preflared with LA Axxess burs showed a more accurate binding of the files to anatomical diameter.  (+info)

Increased Young's modulus and hardness of Col1a2oim dentin. (7/76)

Mice harboring the Col1a2(oim) mutation (oim) express dentinogenesis imperfecta. To determine the effect of Col1a2 genotype on tissue mechanical properties, we compared Young's modulus and hardness of dentin in the 3 Col1a2 genotypes. Upper incisors were tested by nanoindentation. Genotype had a significant effect on Young's modulus, but there was not a simple mutant allele dosage relationship. The effect of genotype on hardness did not reach significance. Hardness and Young's modulus were greater near the dento-enamel junction than near the pulp chamber. Greater hardness and Young's modulus values near the dento-enamel junction reflected continued mineralization of the dentin following its initial synthesis. Analysis showed the mechanical data to be consistent with Fourier transform infrared and backscattered electron microscopy studies that revealed increased mineralization in oim bone. Analysis of the data suggests that clinical fragility of teeth in oim mice is not due to deficiencies of hardness or Young's modulus, but may be due to defects in post-yield behavior or resistance to fatigue damage.  (+info)

Root coverage with free gingival autografts--a clinical study. (8/76)

AIM: To assess the percentage of root coverage with autogenous free gingival grafts. MATERIALS & METHODS: Ten non-smoking patients with Miller's class I or class II recessions were included in the study. The clinical parameters such as recession depth, recession width, probing pocket depth, clinical attachment level and width of the keratinized gingiva were recorded at the baseline, at the end of 1 month, 3 months, and 6 months after the surgical procedure. Autogenous free gingival grafts harvested from the palatal mucosa were used to cover the denuded roots. RESULTS: Four out of ten sites showed 100% root coverage. A mean percentage of 80.3% of root coverage was achieved.  (+info)

  • In conclusion, results suggest that the ECJ and cervical dentine could be at a greater risk of destruction by odontoclasts compared with other regions of the tooth. (
  • Depicted by the cementoenamel junction , the cervical line is the border between the root and crown of a tooth. (
  • Here, we investigated whether Qafzeh anterior teeth (N 5 14) differ from those of modern southern Africans, northern Europeans, and Alaskans (N 5 47-74 depending on tooth type) in the percentage of perikymata present in their cervical halves. (
  • Qafzeh teeth therefore appear to differ from those of modern humans in the same direction that Neandertals do: with generally lower percentages of perikymata in their cervical regions. (
  • In modern humans, perikymata are usually more unevenly distributed, with perikymata becoming increasingly more closely packed as growth progresses from cusp to cervix (but dropping off in density in the last (cervical) decile of growth). (
  • Adenocarcinoma in situ of the uterine cervix: Clinical practice guidelines from the Italian society of colposcopy and cervical pathology (SICPCV). (
  • Cervix Erosion, also known as uterine cervical erosion , is related to charcot-marie-tooth hereditary neuropathy and distal hereditary motor neuropathies . (
  • The cervical enamel rods slope occlusally, ending abruptly at the cervix instead of being oriented gingivally, gradually becoming thinner as in permanent teeth. (
  • Other findings include gingival swell- 5 to 8 mm, the edematous gingival tissues around ing, redness and bleeding, gingival hyperplasia or the cervix of the tooth may approximate the tooth recession, pyorrhea, varying degree of tooth tightly and cause complete obstruction of the mobility, and migration (Fig. The treatment consists of an effective pressure, pus exudes from the cervical area of the plaque control regimen followed by scaling and tooth. (
  • Teeth have an enamel covered ____, a cementum covered _____, and a ____ (where the 2 surface materials meet). (
  • Over time, bruxism can wear down tooth enamel, leading to damage and even tooth loss. (
  • Odontoclastic resorptive lesions involve the enamel cementum junction (ECJ, cervix) and root surface, leading to extensive loss of enamel, dentine and cementum. (
  • Backscattered electron scanning electron microscopy was used to study enamel, cementum and dentine in non-resorbed, undemineralized teeth from adult cats. (
  • During tooth formation, biological rhythms manifest in enamel and dentine, creating a permanent record of growth rate and duration. (
  • Two main categories of defects affecting enamel and dentin have been described: defects caused by environmental factors during the development of teeth and defects caused by genetic factors. (
  • Tetracycline is incorporated with calcium and may be observed in dentin or enamel, which are tooth structures. (
  • As in all cases of tooth development, the first hard tissue to begin forming is dentin , with enamel appearing immediately afterwards. (
  • enamel ABSTRACT Recent studies have suggested that Neandertals and modern humans differ in the distribution of perikymata (enamel growth increments) over their permanent anterior tooth crowns. (
  • V 2009 Wiley-Liss, Inc. The presence of perikymata on the enamel surfaces of teeth has enabled researchers to investigate differences in enamel formation time among fossil hominins, with potential implications for differences in the paces of their life histories (e.g. (
  • 2001). Perikymata are external manifestations of internal growth increments (striae of Retzius) present on the surface of lateral enamel (enamel on the sides of teeth). (
  • In the cuspal region of teeth, striae of Retzius cover each other in a series of domes and do not emerge as perikymata onto the enamel surface. (
  • Cuspal enamel formation time therefore represents an unknown portion of enamel formation time in most studies of fossil teeth. (
  • Although the connection between anterior tooth enamel formation time and life history has been questioned (e.g. (
  • Anatomy of the Teeth Tissues of the Tooth Enamel вЂ" the hard tissue that covers the crown portion of the tooth (hardest substance in the body). (
  • п‚Ё Pulp Parts of a Tooth пЃ® Crown вЂ" top portion of the tooth covered by enamel. (
  • My Grandson has no enamel on his baby teeth, and they suspect these might be his permanent teeth. (
  • In vertebrates, an odontoblast is a cell of neural crest origin that is part of the outer surface of the dental pulp, and whose biological function is dentinogenesis, which is the formation of dentin, the substance beneath the tooth enamel on the crown and the cementum on the root. (
  • Extracted natural teeth are stripped of their enamel and the remaining dentin is then exposed to strong radiation. (
  • Here we present the first rigorous analysis of the largest sample of cremated human skeletal remains (348 burial urns, N = 540 individuals) from the Carthaginian Tophet based on tooth formation, enamel histology, cranial and postcranial metrics, and the potential effects of heat-induced bone shrinkage. (
  • Recommendations Dentin/enamel adhesives Dentin/enamel adhesives allow bonding of resin-based eomposites and eompomers to primary and permanent teeth. (
  • In vitro studies have shown that enamel and dentin bond strength is similar for primary and permanent teeth. (
  • In addition tooth decay? (
  • Oral health warning: Deadly conditions linked to poor dental hygiene - what to look for ORAL health: Good oral and dental hygiene can help prevent bad breath, tooth decay, gum disease and possible other serious medical conditions. (
  • These diseases include serious health conditions affecting the mouth and oral cavity, including oropharyngeal cancer, gum disease and recession, tooth decay, bone loss, failure of dental implants, canker sores, and stained teeth. (
  • Among adults aged 20-64 years, over 40% who currently smoke cigarettes had untreated tooth decay. (
  • Among adults aged 65 and over, 34% who were currently smoking cigarettes had untreated tooth decay. (
  • A chemical compound that is added to toothpaste and drinking water to help prevent tooth decay. (
  • Teeth show dark specks and begin to decay as soon as they appear. (
  • Strata-Flora turns this situation around as they crowd-out and repel undesirable species such as parasites, staff, strep, candida albicans yeast, clostridium, salmonella, E. coli, and even sore throat and tooth decay causing bacteria. (
  • Now, researchers inACS Applied Materials& Interfaces report a bioactive peptide that coats tooth surfaces, helping prevent new cavities and heal existing ones in lab experiments.Conventional treatment for dental cavities involves removing decayed tissue and filling the hole with materials, su. (
  • Now, researchers in ACS Applied Materials& Interfaces report a bioactive peptide that coats tooth surfaces, helping prevent new cavities and heal existing ones in lab experiments. (
  • Tooth cavities are small holes caused by a buildup of bacteria and acid on the surface of a tooth. (
  • Cavities can cause pain, sensitivity to heat and cold, and may lead to infection or tooth loss. (
  • Visit CDC's Smoking, Gum Disease, and Tooth Loss and the American Dental Association's (ADA) Tobacco Use and Cessation external icon pages for more information about the oral health impacts of tobacco use. (
  • Various factors have been suggested to underlie the disease, such as periodontal disease, dietary factors, mechanical stress, developmental tooth defects, breed and viral disease, although none of these factors has been definitively proven to be the direct cause of resorption (see review by Reiter & Mendoza, 2002 ). (
  • Systemic disease, such as syphilis , may affect the appearance of teeth. (
  • Accessed 2013. (
  • 12 A cervix disease that is characterized by the presence of enodcervical columnar epithelium on the ectocervix. (
  • Periodontal disease, either in natural teeth level or implants is characterized by highly pathogen microbes present in the bacterial plaque and dental calculus. (
  • Reconstructive restorations cover the entire tooth, so they will hide serious cosmetic problems. (
  • Dental professionals are working on creating metal-free dental implants which would eliminate the risk of developing allergies to metal among patients who need teeth restorations. (
  • Shorter clinical crown heights of primary teeth also affect the ability of these teeth to adequately support and retain intraeoronal restorations. (
  • Factors interdental papillae without development of that contribute to the accumulation of plaque are periodontal pockets (Fig. However, if gingi- poor oral hygiene, faulty restorations, tooth mal- val hyperplasia is severe, pseudopockets may be position, calculus, food impaction, mouth breath- formed. (
  • Pulp is the innermost portion of the tooth. (
  • Left untreated, they can grow deeper into the tooth, eventually reaching the pulp. (
  • Connective tissue, pierced with nerves and blood vessels (pulp), is available inside the teeth. (
  • Nerves, arteries and veins reach the cavity of tooth or pulp through a hole at the apex of root and feed required nutrients. (
  • Thus, dentin and pulp tissue have similar embryological backgrounds, because both are originally derived from the dental papilla of the tooth germ. (
  • Odontoblasts are large columnar cells, whose cell bodies are arranged along the interface between dentin and pulp, from the crown to cervix to the root apex in a mature tooth. (
  • The pulp chambers of primary teeth are proportionately larger and closer to the surface. (
  • Young permanent teeth also exhibit characteristics that need to be considered in restorative procedures, such as large pulp chambers and broad contact areas that are proximal to primary teeth. (
  • The biopsy is obtained through the use of an endometrial suction catheter that is inserted through the cervix into the uterine cavity. (
  • Having a cavity drilled and filled at the dentist's office can be painful, but untreated caries could lead to worse pain, tooth loss, infection, and even illness or death. (
  • The objectives of restorative treatment are to repair or limit the damage from caries, protect and preserve the tooth structure, reestablish adequate function, restore esthetics (where applicable), and provide ease in maintaining good oral hygiene. (
  • Tooth preparation should include the removal of caries or improperly developed tooth structure to establish appropriate outline, tesistance, retention, and convenience form compatible with the restorative material to be utilized. (
  • The neck, also called the dental cervix, sits between the crown and root. (
  • The crown of a tooth is the portion of the tooth that's visible. (
  • Quantification of these internal and external incremental features yields developmental benchmarks, including ages at crown completion, tooth eruption, and root completion. (
  • The crown of the tooth is completed 1.5 months after birth and erupts into the mouth at around 10 months of age, making these teeth usually the second type of teeth to appear. (
  • The crown of the tooth is completed at around 4-5 years of age and erupts into the mouth at 7-8 years of age. (
  • The overall length of the deciduous maxillary central incisor is 16 mm on average, with the crown being 6 mm and the root being 10 mm. In comparison to the permanent maxillary central incisor, the ratio of the root length to the crown length is greater in the deciduous tooth. (
  • The diameter of the crown mesiodistally is greater than the length cervicoincisally , which makes the tooth appear wider rather than taller from a labial viewpoint. (
  • 2005). Dean and Reid (2001) found that Paranthropus tends to have a more uniform distribution of perikymata along the tooth crown than does Australopithecus. (
  • п‚Ё Clinical crown - portion of the tooth that is visible in the mouth. (
  • 300 of at least 520 days) molars, and that the formation of this crown portion occurred largely after the teeth had already reached functional occlusion. (
  • Our results allow to establish a quantitative link between an additional investment into molar crown growth of sheep and the extension of the functional period of these teeth. (
  • The deciduous tooth appears in the mouth at 8-12 months of age and shed at 6-7 years, and is replaced by the permanent tooth around 7-8 years of age. (
  • Once the bridge is in place, no one will know that your teeth have been seriously damaged by acid erosion.To help prevent future erosion, your dentist may recommend making some changes to your eating habits. (
  • An important gene associated with Cervix Erosion is MAPK1IP1L (Mitogen-Activated Protein Kinase 1 Interacting Protein 1 Like). (
  • It is found that an open "Root channel" is connected to the tooth and nerves, arteries and veins pass through this root channel. (
  • The film is hereby intended to be used for anesthesia of mucous membranes, especially in the mouth cavity for blocking the nerves around the teeth in order to facilitate smaller incisions. (
  • Clinical and histological studies have identified lesions as external, subgingival defects that initiate on the surface of the tooth root and progress to involve dentine. (
  • The hard outer surface of the tooth. (
  • п‚Ё Labial пЃ® Lingual вЂ" surface of the tooth or area touching the tongue. (
  • Formation of these teeth begins at 14 weeks in utero for the deciduous (baby) set and 3-4 months of age for the permanent set. (
  • Odontoblasts first appear at sites of tooth development at 17-18 weeks in utero and remain present until death unless killed by bacterial or chemical attack, or indirectly through other means such as heat or trauma (e.g. during dental procedures). (
  • Dental floss is recommended because of not spit teeth. (
  • It's often hereditary, but thumb-sucking, long-term use of a pacifier or bottles, impacted or missing teeth, and poorly fitting dental appliances can also cause it. (
  • The same day, a dental examination was done and a tooth extraction was performed because of abscess formation. (
  • By measuring tooth formation in the entire dentition of a juvenile Neanderthal from Scladina, Belgium, we show that most teeth formed over a shorter time than in modern humans and that dental initiation and eruption were relatively advanced. (
  • Knowledge of the timing of fossil hominin dental development and tooth eruption is fundamental to assessments of growth and development (for review, see refs. (
  • Moreover, studies of Neanderthal cranial and postcranial ontogeny often use modern European and North American standards of dental development to assign ages and make comparisons (e.g., 4, 15), although it is unclear whether Neanderthal and modern human children actually follow the same schedule of dental development and tooth eruption. (
  • The maxillary central incisor is a human tooth in the front upper jaw, or maxilla , and is usually the most visible of all teeth in the mouth. (
  • Although some scholars debate whether Neanderthals had shorter periods of anterior tooth growth than modern humans ( 6 , 7 ), it is known that anterior tooth growth requires more time in great apes than in humans ( 16 ) and is variable among human populations ( 17 ). (
  • This level of variation within and between hominoid species suggests that anterior tooth formation times are not a reliable predictor of life history ( 6 ). (
  • Supernumerary teeth are common in the maxillary anterior area (mesiodens) and the maxillary molar area (distomolars or fourth molars). (
  • Now occasionally, you get a bit of the cervix that gets left behind, and that's called an anterior lip. (
  • Brief communication The distribution of perikymata on Qafzeh anterior teeth. (
  • Previous studies have suggested that a more homogeneous distribution of perikymata, like that of Neandertals, characterizes the anterior teeth of Homo heidelbergensis and Homo erectus as well. (
  • вЂ" pertaining to the lips: anterior surface of the anterior teeth. (
  • This contest is fueled by the following news: Teeth are bony formations in oral cavity, serving mainly for primary chewing of food. (
  • This is because of the retention of the odontoblasts within the tooth, along the outer pulpal wall. (
  • However, an amalgam or resin restoration could be utilized in a tooth having conversative pulpal access, sound lateral walls, and less than 2 years to exfoliation. (
  • The term anodontia should be reserved for the total absence of primary and secondary teeth, and modifications of anodontia (i.e., partial anodontia, pseudoanodontia) should not be used at all. (
  • Several lineages of herbivorous mammals have evolved hypsodont cheek teeth to increase the functional lifespan of their dentition. (
  • During 6 12 yrs, the milk teeth are gradually replaced with permanent teeth. (
  • Restoration of primary teeth differs from restoration of permanent teeth, due in part to the differences in tooth morphology. (
  • Primary teeth contact areas are broad and flattened rather than being a small distinct circular contact point, as in permanent teeth. (
  • In an erupted tooth, this process rarely extends beyond 1/3 the depth of the dentin, which is why the odontoblast transduction theory of dentinal hypersensivity is unlikely. (
  • However, this age is difficult to determine from a fully formed and isolated tooth, particularly without knowledge of the mean root length at first molar eruption in other Neanderthals. (
  • The teeth involved are tender to percussion root planing, surgical procedures, and, in certain and occasionally mobile. (