Dental Histology, Embryology & Anatomy - Final Study Guide, Exams of Nursing

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Dental Histology, Embryology &

Anatomy- Final Study Guide (On Board

Exam 2024. Quizs & Ans. Graded A+

70% inorganic material, 20% organic collagen fibers, 10% water

• ANSDentin is composed of... 96% - ANSWhat is the full mineralization level of enamel? 96% inorganic material, 3% water, 1% organic material - ANSEnamel is composed of... Abfraction - ANSWhat is the possible loss of enamel through tensile and compressive forces during tooth flexure with parafunctional habits? Abrasion - ANSWhat is the wearing of enamel through excessive toothbrushing or abrasive toothpaste? Accessory canal - ANSWhat forms when Henrtwigs epithelial root sheath encounters a blood vessel during root formation? After enamel is finished with the apposition and maturation stage - ANSWhen is the reduced enamel epithelium formed? After mantle dentin - ANSWhen does circumpulpal dentin form? Aging Attrition Recession Dentinal caries - ANSWhat causes exposure of dentin? Ameloblast Cells - ANSEnamel matrix is produced by.... Amelogenesis - ANSWhat is the process of enamel matrix formation? Apical foramen - ANSWhat is the last part of the tooth to form, after the crown erupts into the oral cavity? Apical foramen - ANSWhat is the opening from pulp into surrounding PDL near each apex of a

tooth? Apical foramen - ANSWhat is the opening in the root's pulpal canal? Apical foramen - ANSWhat provides communication between the pulp and PDL? As the fused tissue disintegrates through eruption - ANSWhen are ameloblasts lost forever? Attrition - ANSWhat is the wearing away of hard tissue as a result of tooth to tooth contact? Blood Pulp stones Nerves Fibroblasts Odontoblasts - ANSPulp consists of: Calcium (saliva) & fluoride - ANSHow does mineralization of enamel continue after eruption? Caries - ANSWhat is the loss of enamel through chemical means for cariogenic bacteria by way of dental biofilm? Cell-free zone of pulp - ANSWhere are the nerves capillary plexus located? Cervical Surface - ANSOn what surface of a tooth is enamel thinner? Circumpulpal dentin - ANSWhat is the layer of dentin around the outer pulpal wall, which forms the bulk of dentin? Contour lines of Owen - ANSWhat are a number of adjoining parallel imbrication lines that are present in stained dentin? These are disturbances in body metabolism that affects the odontoblasts by altering formation. Coronal pulp - ANSWhich pulp is found in the crown? Coronal pulp & radicular pulp - ANSWhat are the two divisions of the pulp chamber? Coronal region, where occlusal forces are greatest - ANSWhere is the DEJ more pronounced? DEJ - ANSTomes' process of ameloblasts face the _________. DEJ - ANSWhat is a ridge between the dentin and enamel that allows increased

adherence between them? This adds strength to the junction when the teeth are in function during mastication to prevent shearing of the enamel during function. DEJ - ANSWhere does the first wave of enamel maturation occur? Dental papilla - ANSDentin is derived from... Dental papilla - ANSPulp is derived from the... Dentin - ANSWhat forms the bulk of the tooth? Dentin - ANSWhat protects the pulp of a tooth? Dentin hypersensitivity - ANSExposure of dentin causes... Dentinal tubules - ANS____________ contains dentinal fluid, an odontoblastic process, and possibly an afferent axon. Dentinal tubules - ANSOpen _______________ are a source of sensitivity as there is communication from the mouth to the pulp through this. Movement of fluid through these is what causes pain. Dentinal tubules - ANSPulp supplies a vascular supply to dentin, obtained through _____________. Dentinal tubules - ANSWhat are the long tubes in the dentin that extend from the DEJ in the crown area or DCJ in the root area to the outer wall of the pulp? Dentinal tubules - ANSWhat is the structural unit of dentin? Dentinogenesis - ANSWhat is the process of dentin matrix of predentin formation that occurs during the apposition stage of tooth development? During a root canal - ANSWhen may an accessory canal be a problem? Enamel - ANSThe hardest biological tissue in the human body Enamel - ANSWhat provides a hard surface for mastication and speech? Enamel

lamellae - ANSWhat are partially mineralized vertical sheets of enamel matrix, which have no clinical importance? Enamel rod

• ANSWhat is the structural unit of enamel? Enamel spindle - ANSWhat are small dark brushes with a base near the DEJ? These are areas of less mineralization, which have no clinical importance. Erosion - ANSWhat is the wearing of enamel by chemical means, such as vomiting, gastric reflux, or recreational drug use? False - ANSAll teeth have accessory canals. True or false? False - ANSEnamel is a renewable tissue. True or false? False - ANSOnly one ameloblast will contribute to one specific rod. True or false? False. Instead it has amelogenins, ameloblastins, and enamelins. - ANSEnamel contains collagen protein. True or false. False. Only enamel is present! - ANSThe hard substances visible in a healthy mouth, with no recession, are enamel, dentin and pulp. True or false? False. They are located in the pulp. - ANSCollagen fibers and reticular fibers are found in the enamel. Fluoride intake during tooth development
• ANSEnamel dysplasia is a result of... Globular dentin - ANSIn which type of dentin has primary and secondary mineralization have occurred with complete crystalline fusion? (lighter rounded areas of dentin) Hypocalcification - ANSWhat is insufficient growth of enamel crystals or insufficient number of crystals deposited? "Soft teeth" Hypoplastic - ANSIn _________ enamel, the number and growth of crystals is ok, but enamel

remains thin Imbrication line OR Perikymata - ANSWhat are slight ridges, which extend mesiodistally in the cervical third of a tooth, associated with lines of retzius? They are lost through tooth wear except on protected cervical regions. Imbrication lines of VonEbner - ANSWhat are distinguishable lines caused by the incremental depositing of dentin? Incisal Surface - ANSOn what surface of a tooth is enamel thicker? Interglobular dentin - ANSIn which type of dentin has only primary mineralization occurred and they did not fuse completely? As a result it is less mineralized. (Found in coronal dentin, appear dark arclike areas in dentin) Interrod enamel - ANSWhat is the outer enamel surrounding each enamel rod core, creating an interprismatic region? Intertubular dentin - ANSWhat is the highly mineralized dentin found between the tubules? Less mineralized - ANSIs the secondary dentin more or less mineralized than primary dentin? Lines of Retzius - ANSWhat are incremental lines that appear in a microscopic section of mature enamel? (look like tree growth rings) Mantle dentin - ANSWhat is the first prevention that forms and matures within the tooth? This is the outermost dentin. Maturation - ANSDuring what stage is enamel fully mineralized? More radiolucent than enamel, more radiopaque than pulp. - ANSOn a radiograph, dentin appears more _______ than enamel, and more _______ than pulp. Neonatal line - ANSWhat are

pronounced lines of retzius, which mark trauma by ameloblasts during birth? Neonatal line - ANSWhich type of lines are caused from trauma at birth? Odontoblast - ANSThe cell body of the _______________ in the pulp allows for tissue to be made throughout life. Odontoblastic layer - ANSWhich layer of pulp lines the outer pulpal wall? Odontoblasts - ANSWhat are dentin forming cells? Outer enamel surface - ANSEnamel rods extend from the DEJ to the _________. Overlaps cervically forming the CEJ - ANSWhere does the second wave of enamel maturation occur? Oxygen radicals from peroxide in whitening products - ANSHow are stains on the interrod enamel removed? Pain - ANSHow are sensations from the pulp interpreted by the brain? Peritubular dentin - ANSWhat is the highly mineralized dentin that creates the wall of the tubules? Predentin - ANSWhat is the initial material laid down by odontoblasts? Primary - ANSIn which stage of dentin maturation do calcium hydroxyapatite crystals form as globules in the collagen fiber of the predentin, expanding and fusing together during the primary mineralization phase? Primary dentin - ANSWhich dentin is formed in the tooth before completion of the apical foreman the root? Primary Teeth - ANSOn which set of teeth does enamel appear more opaque? Pulp - ANSA function of _________ includes support, maintenance, and continued formation for dentin. Pulp - ANSCell bodies of odontoblasts

remain in the ___________, along the outer wall. Pulp - ANSWhat detects changes in temperature, vibrations, and chemical changes? Pulp - ANSWhat is the innermost soft tissue of the tooth? Pulp - ANSWhat provides a vascular supply to dentin? Pulp chamber - ANSWhat is the portion of the tooth that contains the mass of the pulp? Pulp horns - ANSWhat are small extensions of coronal pulp into cusps of posterior teeth? Pulp stones - ANSWhat are masses of calcification in the pulp? Pulpal core - ANSWhat is the center of the pulp chamber? Radicular pulp - ANSWhich pulp is found in the root of a tooth? Radiolucent - ANSHow does pulp appear on a radiograph? Radiopaque - ANSOn a radiograph, enamel appears more _______ than dentin and pulp. Secondary - ANSIn which stage of dentin maturation do new areas of mineralization occur as globules form in the partially mineralized predentin? Secondary dentin - ANSWhich dentin forms after the completion of the apical foramen, after the crown is in occlusion, and continues to form throughout life? Secondary dentin - ANSWhich dentin forms more slowly? Primary dentin or secondary dentin? Support Sensory Nutritional Protective Trigger white blood cells

• ANSWhat are the functions of pulp? Tertiary dentin - ANSWhat is the reparative dentin? Tertiary dentin - ANSWhich dentin is formed quickly in localized regions in response to an injury to the exposed dentin? Tertiary dentin - ANSWhich

dentin is formed underneath the exposed dentin's tubules along the outer pulpal wall? Tetracycline and dental fluorosis - ANSIntrinsic staining is caused from... The enamel organ - ANSEnamel is derived from... The incisal/occlusal portion of the future crown near the forming DEJ - ANSWhere is the enamel matrix first formed? The interrod enamel, internally on the tooth - ANSWhere does the staining on teeth occur? The second wave - ANSWhat wave of enamel maturation forms the CEJ? Tomes' granular layer - ANSWhat is dentin beneath cementum and adjacent to the DEJ that looks granular? Tomes' Process - ANSEnamel matrix is secreted from each ameloblast from its... Tomes' process - ANSThe specific shape of the enamel rod is dictated by.... Tomes' Process - ANSWhat is the guiding factor of an ameloblast, responsible for the way the enamel matrix is laid down? True - ANSAppositional growth of dentin occurs throughout life because of retention of odontoblasts. True or false? True - ANSAs dentin ages, tubules narrow, and odontoblasts undergo cytoplasmic changes. True or false? True - ANSAs the pulp ages, the apical foramen may be obliterated with cementum, leading to plural necrosis. True or false? True - ANSPulp is a connective tissue. True or false? True - ANSPulp stones are an abnormality. True or false? True - ANSPulp triggers inflammatory and immune responses. True or false? True - ANSThe pulp is composed of undifferentiated

mesenchymal cells True - ANSWhite blood cells are present in the pulp. True or false? Yes - ANSCan contour lines of Owen be whitened?