Amarillo college Dental hygeine Orofacial 2016
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The ________ are rounded areas of specialized,thickened ectoderm found at the location of developing special sense organs.
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placodes
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which of the following do teh final stages of meiosis occur during prenatal development
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ovum
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A prenatal diagnostic precedures to detect chromosomal abnormalities
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amniocentesis
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When is the palate formed during prenatal development
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Spannign both the embryonic and fetal periods
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Which of the following can occur tha tmainly involves the abnormal development of one or more structures from ectoderm within the embryonic period
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Ectodermal Dysplasia
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Which period of prenatal development is characterized by increased cellular difference
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Preimplantation period
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The Philtrum of the upper lip forms during sixth week of prenatal development from the___
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Medial nasal processes
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The medial nasal processes are involved directly in the formation of the embryo's ___ of the nose during prenatal development
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Bridge
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How many processes are considered major during facial development so that they became the centers of growth for the face?
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Three
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The development of the neck parallels to development of the face over time, beginning during the 4th week of prenatal development with in the embroyonic period and completed during the __ period
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Fetal
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The development disturbance of cleft lip is more commonly found?
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In Males
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Which of the following structures is initially formed during the 5th week of prenatal development
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Intermaxillary segment
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During whcih week of prenatal development is the palate completed
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5th week
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Which of the following facial structure is formed from the mandibular arch durign prenatal development
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Lower face
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The facial development that starts in the 7th week will be completed later in the ___ week of the fetal period
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12th
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Which of the following phrases concernign the second branchial arch during prenatal development is correct
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Contains Reicherts Cartilage
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What best characterizes the 1st week of prenatal develpment so that the blastocyst splits into smaller and more numberous cells
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Mitotic Cleavage
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The frontal process is a swelling that appears over the developing brain in the embryo during prenatal development and forms the future
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Forehead
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Which of the folliwng tissue usually used both interstitial and appositional growth to attain its final size
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Mature Bone
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The folding of the emryo during prenatal development causes ___ to be on the ___
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Endoderm Inside the embryo
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Which of the following structures initially forms during the 3rd week of prenatal development
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Primitive Streak
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How many X-type Chromosomes are necessary for the embryo to become of the female gender present druing prenatal development
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Two
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How many pairs of somites form the cuboidal segments of mesoderm within the embryo during the 3rd week of prenatal development
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38
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Around the lingual swelligns the cells degenerate forming a sulcus, which frees the body of the tongue from the floor of the mouth except for the attachment of the___
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Lingual Frenum
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When does the blastocyte stops travelign and undergoes implantation during prental development
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1st Week
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When do the paranasal sinuses develop during prenatal development
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Fetal period & After birth
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which of the following statements concerning facial development is correct
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All 3 embryonic Layers are invlolved in facial development
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Nonsuccedoneous permanent teeth develop from buds that grow off an extension of
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Each primary second molor's dental lamina
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From which structure during prenatal development is the palatine tonsillar tissue derived
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2nd Pharyngeal Pouches
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which of the following embryonic structures become the dentinoenamel junction during completion of tooth development
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Basement membrane between the enamel organ & dental Papilla
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The mandibular arch during the embryonic period of prenatal development is
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Fusion fo the two paired mandibular processes
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During prenatal development the oropharnygeal membrane of the embryo
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Located superior to the 1st branchial arch
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The Anterior part of the foregut and will form the primitive pharynx and the foregut is orginally derived from the ____
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endoderm embryoic cell layer
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From which embryonic layer is mesoderm derived during prenatal development
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Epiblast Layer
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A type of cleft lip can result during prenatal development from the lack of fusion between ___ processes
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Medial Nasal & Maxillary
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What is the first event in the development of the face during the later part of the 4th week of prenatal development
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Disintegration of the oropharyneal membrane
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The maxillary processes on each side of the face partially fuses with the mandibular arch on each side to create the ____
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Labial commissures
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The small paired nasopalatine canals are represented in teh mature hard palate by the ___
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Incisive foramen
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The ____ is a superficial demarcation of the line of fusion of hte two lateral lingual swellings during tonge development as well as that of a deeper fibrous structre.
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Median Lingual sulcus
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The dental lamina is an embryonic structure that develops from the ___
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Oral Epithelium
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The Primitive streak forms in the embryonic disc during prenatal development
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Bilateral symmetry
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Which of the following statements concering tongue development is correct
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Tongue development begins as a triangular median swelling the tuberculum impar
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which of the following statements concerning the tongue disturbances is correct
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Ankyloglossia may be associated with other craniofacial abnomralites
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which of the following statement concerning prenatal development is correct
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Initiation of embryonic layers occuring during the 1st week
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What structure partially seperates the nasal and oral cavities in the 5th week of prenatal development
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Mandibular arch
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Which of the following completions of developments allow the paired nasal cavity and the single oral cavity in the fetus to become completly seperated.
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Nasal septum & Final palate completion
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To complete the palate in which direction deos the involved structures gradually fuse
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Anterior to Posterior
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Which teeth are associated with the further development of the primary palate
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Maxillary incisors
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When does tongue development occur during prenatal development
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During the 4th to 8th week
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Considering the development distrubance of cleft palate, Which is correct
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May be isolated or associated with other abnormalities
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What part of the final palate does the secondary palate give rise to
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Both hard and Soft Palate 2/3 of the hard palate
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The tongue developes from multiple swelling derived from
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1st 4 branchial arch
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implantation fo the zygote may also occur outside the uterus during prenatal development with an ___
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ectopic pregnancy
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if there is a failure of migration fo the neural crest cells to the facial region during prenatal development ___ can develop in the embryo
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Treacher Collins Syndrome
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What exact cells are localized to the nerual plate of the embryo during the 3rd week of prenatal development
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Neuroectoderm
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The outer cells of hte denal papilla are induced to differentiate during tooth development into
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Odontoblasts
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During the cap stages of tooth development, the tooth germ consists of
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Enamel organ, dental sac, dental papilla
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How many buds in the dental lamina appear along each dental arch during odontogenisis of the primary dentition
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10
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What is the exact term for hte process that affects the development of specific tissue structure or differeing form due to embryonic cell migration and inductive interactions
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Morphogenesis
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Which way does the sulcus terminalis point toward the oropharynx after tongue development
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Backwards
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The fusion of the maxillary and medial nasal processes to form the upper lip is completed during the end to the ____ week of prenatal development when the grooves between the processess are obliterated
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7th
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During whihc week of prenatal development does the neural plate differentiate
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3rd week
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Which of the following tissues listed will develop from the ectoderm layer of the embryo during prenatal development
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Epidermis
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The neural crest cells migrates from whihc embryonic structures during prenatal development
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Neural folds
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Where does the dental lamina begin to form first in the developing dental arch
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Near the midline
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When the second brancial groove occasionally does NOT become obliterated, it has parts that remain after cervical development and can from
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Branchial cleft cyst
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What does the maxillary process form from during the fourth week of prenatal development
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Mandibular arch
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Which of the following is NOT part of the developing branchial apparatus durign cervical development
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Branchial cleft cysts
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What exact cells or structures develop from neuroectoderm and migrates from the neural fold to then join mesoderm to form mesenchyme during the 3rd week of prenatal development
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Nerual crest Cells
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The fusion of the 2 palatal shelves w/ primary palate is dependent on the___
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change in the position of the tongue
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As the tongue develops still further, the copula of the tonge base, after overgrowing the second branchial arch, merges w/ the anterior swellings of the first branchial arch of the tongue body, with the fusion is superficially demoncated by the ___
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Sulcus Terminalis
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During tonge development what does the epiglottic swelling develope from
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first 4 branchial arches
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Which paired processes fuse to form the intermaxillary segmetn internally within the embryo during prenatal development
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Medial Nasal processes
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The intermaxillary segment is an internal wedge shaped mass that extends inferiorly and deep to the nasal pit on the
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Wall of the maxillary sinus
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What is teh prenatal organ that joins the pregnant woman and the developing embryo during the 2nd week or prental development
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Placenta
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Which stage of tooth formation occurs for the primary dentition during the 11th and 12th week of prenatal development
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Bell Stage
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Which of the following is the most common complication associated with dens in dente
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Lingual pit formation
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Which of hte following permanent teeth con be considered nonsuccedaneous
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Molars
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What is the known etiology of supernumerary teeth
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Hereditary factors
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which permanent teeth undergo partial andontia the most with in the developing oral cavity
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third molars
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The initiation stage of ondontogensis
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Proliferation
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The overlapping period between teh primary and permanent dentition is best nosidered the ___ period
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Mixed dentiton
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by the end of the first week of prenatal development the blastula stops traveling and undergoes
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Implantation
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Found in early prenatal development, the neural tube will form in the future which structures
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Spinal Cord
