Oral Histology Quizzes /10 0 Intro Oral Histology 1 / 10 ectodermal proliferation in 6th W.I.U done by the influence of: Neural crest cells in the ectoderm. Ectomesenchymal cells. Ectodermal cells. Odontogenic epithelial islands. 2 / 10 lingual extension of dental lamina is the origin of: 6 buds of Permanent successors. 10 buds of Permanent successors. 10 buds of deciduous teeth. 6 buds of Permanent molars. 3 / 10 successional dental lamina is: Labial Dental lamina Lateral Dental Lamina lingual extension of main Dental Lamina posterior extension of main Dental Lamina 4 / 10 the primitive oral cavity (stomodeum) is lined by: Ectoderm Neural Crest Cells Mesoderm Ectomesenchyme 5 / 10 Vestibular lamina Located: lingually facially 6 / 10 The primary epithelial band divides into how many laminae? 2 1 3 4 7 / 10 deciduous teeth buds develope from: posterior extension of dental lamina Lateral dental Lamina lingual extension of dental lamina all the above 8 / 10 posterior extension of the dental lamina is: the origin of Permanent successors. the origin of deciduous teeth. the origin of Permanent molars. mesial to the deciduous second molar (E). 9 / 10 Central cells degenerate to form clef in which structure: odontogenic epithelial islands primary epithelial band vestibular lamina dental lamina 10 / 10 dental lamina located: facially lingually Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin /10 0 Bud stage & Cap stage 1 / 10 The dental lamina: Develops from the oral epithelium. Has no branching. Breaks at the cap stage. Has no remnants. 2 / 10 The dental sac is: The condensation of the ectomesenchymal cells surrounding the dental papilla. The condensation of the ectomesenchymal cells surrounding the dental organ and dental papilla. The condensation of the ectomesenchymal cells surrounding the dental organ. None of the above. 3 / 10 Which of the following is a component of tooth germ? Dental sac. Vestibular lamina. Lateral dental lamina. Successional lamina. 4 / 10 The origin of enamel is: Ectoderm. Mesoderm. Endoderm. Ectomesenchyme. 5 / 10 Before enamel formation begins: Both knot and cord remain. Enamel knot disappears and enamel cord remains. Enamel knot remains and enamel cord disappear. Both knot and cord disappear. 6 / 10 The tooth germ is composed of: Dental follicle, dental lamina, vestibular lamina. Dental organ, dental follicle, dental lamina. Dental papilla, dental lamina, dental organ. Dental papilla, dental follicle, dental organ 7 / 10 The ectomesenchymal cell condensation just beneath the enamel organ is called: Dental sac. pulp. Dental follicle. Dental papilla. 8 / 10 The dental lamina initiating the permanent molars develops: As lateral dental lamina. As successional lamina. As vestibular lamina. As a distal extension of the dental lamina. 9 / 10 During the early stages of tooth development three transitory structures may be seen, these structures are: a) b) Enamel knot, enamel epithelium Enamel knot, enamel cord enamel organ & enamel epithelium enamel organ & enamel knot 10 / 10 The dental lamina is induced to proliferate into a tooth bud by the: Nerve endings. Oral epithelium. Ectomesenchyme. Basement membrane. Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin /10 0 Early bell stage 1 / 10 I.E.E. arranged on the basement membrane as the pattern of: cemento-dentinal junction dentino-gingival junction amelo-dentinal junction cemento-enamel junction 2 / 10 cell free zone of enamel organ in the early bell stage: c) present b) occupied by the I.E.E a) disappear both a and b 3 / 10 epithelial connection between proper dental lamina and the bell shape in early bell stage described as : short and broad long and broad long and narrow short and narrow 4 / 10 I.E.E. in dental organ of the early bell stage: star shaped cells low cuboidal cells high cuboidal cells tall columnar cells 5 / 10 Stratum intermedium are : tall columnar cells squamous cells star shaped cells low cuboidal cells 6 / 10 process of differentiation of the UMCs to odontoblasts in early bell stage is called : functional polarity cellular repolarization induction receprocal induction 7 / 10 the I.E.E. covers the O.E.E. in the rim of the enamel organ for a short distance which is called Stellate Reticulum induction Stratum intermedium cervical loop 8 / 10 Outer enamel epithelium in dental organ of the early bell stage: high cuboidal cells star shaped cells low cuboidal cells tall columnar cells 9 / 10 Early bell stage characterized by: started by the formation of enamel No hard dental tissue Hard dental tissue is present. started by the formation of dentine 10 / 10 the origin of odontoblasts in early bell stage: Preameloblast cuboidal cells squamous cells U.M.Cs. Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin /10 1 Late bell stage & Functions of cell layers 1 / 10 Late bell stage starts by deposition of : first layer of dentine last layer of dentine first layer of cementum first layer of Enamel 2 / 10 according to sources of nutrition to enamel organ by formation of the dentin the source of dental papilla is: increase decrease present cut off 3 / 10 in late bell stage the lateral dental lamina will be degenerated by the invasion of mesoderm and its remnants is called Inner enamel epithelium epithelial rests of Malasaz epithelial rests of Serres Outer enamel epithelium 4 / 10 which cell layer that Acts as a cushion against any physical forces: Enamel Knot Stellate reticulum Stratum intermedium Preameloblast 5 / 10 which cells that Provide space for the developing enamel? Stellate reticulum Amelobalst Odontoblast Stratum intermedium 6 / 10 life span of the dental lamina is about: 5 W.I.U 2 M.I.U 5 years 2 years 7 / 10 Before dentin formation the avascular enamel organ takes its nutrition from two sources which are: dental papilla and dental sac dental papilla and dental lamina dental papilla and dental organ dental organ and dental lamina 8 / 10 which cell layer that determine the morphology of the amelo-dentinal junction: O.E.E Stratum intermedium I.E.E Stellate Reticulum 9 / 10 Process by which I.E.E is converted to ameloblast under the influence of the first layer of dentine: Induction Functional polarity Cellular repolarization reciprocal induction 10 / 10 functional unite for enamel formation is composed of : Stellate reticulum and Stratum intermedium ameloblasts and odontoblasts ameloblasts and Stellate reticulum ameloblasts and Stratum intermedium Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin /10 0 Root formation & Clinical Considerations 1 / 10 The apposition stage of tooth development begins: When odontoblast start to differentiate. When the first layer of enamel lay down. When the root of the tooth begins to develop. When the first layer of dentine is deposited. 2 / 10 Which of the following is not derived from the dental organ: Hertwig's epithelial root sheath. Odontoblasts. Stellate reticulum. Ameloblasts. 3 / 10 The epithelial rests in the periodontal ligament are derived from: Dental sac. Vestibular lamina. Epithelial root sheath of Hertwing's. Dental pulp. 4 / 10 Concrescence is: An extra root or accessory roots in a formed tooth. Distorted root or roots in a formed tooth. A union of root structure of two or more teeth through cementum only. A spherical projection on the cemental root surface. 5 / 10 What statement about epithelial diaphragm is not true? Its proliferation is accompanied by proliferation of pulp cells adjacent to diaphragm. It produces narrowing of the wide cervical opening. It's growing end is located coronal to the root sheath. It grows in a horizontal plane. 6 / 10 The number of roots that are formed is determined by the: Number of root sheaths developed by the enamel organ. Number of root sheaths developed by the dental sac. Number of medial ingrowths at the epithelial diaphragm. Thickness of the cervical loop. 7 / 10 If Hertwig’s epithelial root sheath does not disintegrate: The apical end of the junctional epithelium will lie occlusal to the cemento-enamel junction. It is likely that some of the enamel will be resorbed. predentine will form on the outer surface of the radicular dentin. No cementum will be formed on the radicular dentin. 8 / 10 The epithelial root sheath of Hertwig disintegrates: After cementum formation. Before odontoblastic differentiation. After odontoblastic differentiation & before dentin matrix formation. After odontoblastic differentiation & dentin matrix deposition. 9 / 10 Enamel pearls occur in: Apical third of molars roots. Furcation area of molars. Cervical third of molars roots. Furcation area of premolars. 10 / 10 Epithelial rests of Malassez are: Epithelial strands and may undergo degeneration only. Epithelial remnants of the epithelial root sheath of Hertwig only. All of them Network or isolated islands in the P.L. only, Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin /50 0 Tooth Development Practical Quiz 1 1 / 50 A is : Successional Dental Lamina Vestibular Dental Lamina Lateral Dental Lamina Distal Extension of the main dental lamina Main Dental Lamina 2 / 50 H is : Pulp Alveolar Bone Epithelial Rests Odontoblasts predentin Cementoblasts Dentin Dental Sac 3 / 50 B is : Successional Dental Lamina Enamel niche Tooth bud of the successor Dental Sac Lateral Dental Lamina Dental papilla Enamel Organ 4 / 50 A is : Dental Lamina Successional Lamina Vestibular Lamina Primary epithelial band 5 / 50 E is : Dental papilla Lateral Dental Lamina Successional Dental Lamina Enamel niche Tooth bud of the successor Enamel Organ Dental Sac 6 / 50 G is : Cementoblasts Odontoblasts predentin Epithelial Rests Alveolar Bone Pulp Dental Sac Dentin 7 / 50 A is : Dentin Dental Sac Alveolar Bone Odontoblasts Epithelial Rests predentin Pulp Cementoblasts 8 / 50 A is : Ameloblasts Stratum intermedium Dentin Enamel matrix Odontoblasts Predentin 9 / 50 C is : Inner Enamel Epithelium proliferating zone Outer Enamel Epithelium 10 / 50 A is : Oral epithelium Enamel Knot Primary epithelial band Ectomesenchymal Condensation 11 / 50 J is : predentin Dentin Pulp Cementoblasts Epithelial Rests Odontoblasts Alveolar Bone Dental Sac 12 / 50 E is : predentin Dental Sac Epithelial Rests Pulp Cementoblasts Alveolar Bone Dentin Odontoblasts 13 / 50 Which Stage is this : Late Bell stage Early Bell stage Bud Stage Cap Stage 14 / 50 C is : Enamel matrix Predentin Stratum intermedium Dentin Ameloblasts Odontoblasts 15 / 50 I is : Cementoblasts Dental Sac Dentin predentin Alveolar Bone Odontoblasts Pulp Epithelial Rests 16 / 50 C is : Ameloblasts Predentin Enamel Odontoblasts Stratum Intermedium Dentin Stellate Reticulum 17 / 50 E is : Dentin Stratum Intermedium Predentin Enamel Stellate Reticulum Ameloblasts Odontoblasts 18 / 50 F is : Enamel Cord Inner Enamel Epithelium Stellate Reticulum Enamel Knot 19 / 50 B is : Primary epithelial band Enamel Knot Ectomesenchymal Condensation Oral epithelium 20 / 50 B is : Successional Dental Lamina Main Dental Lamina Distal Extension of the main dental lamina Vestibular Dental Lamina Lateral Dental Lamina 21 / 50 C is : Odontoblasts Dental Sac Epithelial Rests Cementoblasts predentin Pulp Dentin Alveolar Bone 22 / 50 D is : Lateral Dental Lamina Dental Sac Enamel Organ Tooth bud of the successor Successional Dental Lamina Dental papilla Enamel niche 23 / 50 C is : Dental Sac Tooth bud of the successor Enamel niche Successional Dental Lamina Lateral Dental Lamina Enamel Organ Dental papilla 24 / 50 F is : Dentin predentin Epithelial Rests Alveolar Bone Cementoblasts Pulp Odontoblasts Dental Sac 25 / 50 F is : Predentin Stellate Reticulum Dentin Odontoblasts Enamel Stratum Intermedium Ameloblasts 26 / 50 The arrows refer to : Accessory Root Canal Trifurcation Tongue like extension Enamel Pearl 27 / 50 B is : Successor Primordium Dental Lamina Vestibular Lamina Successional Lamina 28 / 50 F is : Ameloblasts Odontoblasts Predentin Stratum intermedium Dentin Enamel matrix 29 / 50 F is : Dental Sac Enamel niche Dental papilla Enamel Organ Successional Dental Lamina Lateral Dental Lamina Tooth bud of the successor 30 / 50 The arrows refer to : Enamel Pearl Tongue like extension Accessory Root Canal Trifurcation 31 / 50 A is : Enamel Niche Reduced enamel epithelium Serres’ Pearls Stellate Reticulum 32 / 50 D is : Enamel Stratum Intermedium Ameloblasts Predentin Stellate Reticulum Odontoblasts Dentin 33 / 50 E is : Stellate Reticulum Inner Enamel Epithelium Enamel Knot Enamel Cord 34 / 50 B is : Cementoblasts Alveolar Bone Pulp Dentin Epithelial Rests proliferating zone predentin Odontoblasts 35 / 50 What is this clinical consideration: Tongue like extension Accessory Root Canal Enamel Pearl Trifurcation 36 / 50 E is : Distal Extension of the main dental lamina Successional Dental Lamina Vestibular Dental Lamina Main Dental Lamina Lateral Dental Lamina 37 / 50 The green arrow refers to : Epithelial diaphragm Cervical loop 38 / 50 A is : proliferating zone Inner Enamel Epithelium Outer Enamel Epithelium 39 / 50 The green arrow refers to : Epithelial diaphragm Cervical loop 40 / 50 B is : Odontoblasts Enamel matrix Dentin Predentin Ameloblasts Stratum intermedium 41 / 50 G is : Enamel Ameloblasts Stellate Reticulum Predentin Stratum Intermedium Odontoblasts Dentin 42 / 50 The green arrow refers to : Epithelial diaphragm Cervical loop 43 / 50 D is : Vestibular Dental Lamina Successional Dental Lamina Main Dental Lamina Lateral Dental Lamina Distal Extension of the main dental lamina 44 / 50 D is : Odontoblasts Epithelial Rests Alveolar Bone Dental Sac Cementoblasts Growing tip of Epithelial Diaphragm predentin Dentin 45 / 50 B is : Inner Enamel Epithelium Outer Enamel Epithelium proliferating zone 46 / 50 A is : Dental papilla Successional Dental Lamina Dental Sac Enamel niche Lateral Dental Lamina Tooth bud of the successor Enamel Organ 47 / 50 C is : Successional Dental Lamina Vestibular Dental Lamina Distal Extension of the main dental lamina Lateral Dental Lamina Main Dental Lamina 48 / 50 G is : Enamel niche Dental papilla Enamel Organ Lateral Dental Lamina Successional Dental Lamina Dental Sac Tooth bud of the successor 49 / 50 E is : Stratum intermedium Enamel matrix Predentin Odontoblasts Ameloblasts Dentin 50 / 50 D is : Stratum intermedium Dentin Ameloblasts Predentin Enamel matrix Odontoblasts Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin /51 0 Tooth Development Practical Quiz 2 1 / 51 Yellow arrow refers to : Outer Enamel Epithelium Stellate Reticulum Inner Enamel Epithelium Stratum Intermedium 2 / 51 B is : Dental papilla Dental sac Odontoblasts 3 / 51 B is: Oral epithelium Dental lamina Vestibular lamina Primary epithelial band 4 / 51 C is : Dental papilla Dental sac Odontoblasts 5 / 51 A is : Odontoblasts Pre-Ameloblasts Stellate Reticulum Stratum intermedium Predentin 6 / 51 A is: Vestibular lamina Dental lamina Oral epithelium Primary epithelial band 7 / 51 A is : Outer Enamel Epithelium Dental papilla Dental sac Stellate Reticulum Stratum intermedium 8 / 51 B is : Flat Cells Ectomesenchyme Columnar Cells Ectoderm 9 / 51 A is : Dental sac Odontoblasts Dental papilla 10 / 51 C is : Flat Cells Ectoderm Ectomesenchyme Columnar Cells 11 / 51 Green arrow refers to : Inner Enamel Epithelium Stellate Reticulum Outer Enamel Epithelium Stratum Intermedium 12 / 51 Mention The Stage in This Section : Bud Stage Early Bell Stage Late Bell Stage Cap Stage 13 / 51 D is : Columnar Cells Flat Cells Ectomesenchyme Ectoderm 14 / 51 E is : Preameloblasts Cervical loop Stratum Intermedium Stellate Reticulum Outer Enamel Epithelium 15 / 51 B is : Vestibular Lamina Primary epithelial band Dental Lamina Oral epithelium 16 / 51 B is : Odontoblasts Stellate Reticulum Inner Dental epithelium Dental papilla Stratum intermedium 17 / 51 E is : Outer Enamel Epithelium Stellate Reticulum Dental sac Stratum intermedium Dental papilla 18 / 51 A is : Primary epithelial band Vestibular Lamina Dental Lamina Oral epithelium 19 / 51 Which stage is this? Stage of Dental Lamina Bud Stage Early Bell Stage Late Bell Stage 20 / 51 A is : Stellate Reticulum Stellate intermedium Cell Free Zone Outer Enamel Epithelium 21 / 51 C is : Enamel Organ Dental Sac Dental Papilla 22 / 51 D is : Cervical loop Stellate Reticulum Stratum Intermedium Outer Enamel Epithelium Preameloblasts 23 / 51 B is : Ameloblasts Stratum Intermedium Dentin Predentin Enamel Odontoblasts Stellate Reticulum 24 / 51 A is : Stellate Reticulum Ameloblasts Enamel Predentin Odontoblasts Dentin Stratum Intermedium 25 / 51 D is : Stratum intermedium Outer Enamel Epithelium Dental sac Dental papilla Stellate Reticulum 26 / 51 C is : Primary epithelial band Dental lamina Oral epithelium Vestibular lamina. 27 / 51 B is : Vestibular lamina. Dental lamina Primary epithelial band Oral epithelium 28 / 51 B is : Stratum intermedium Pre-Ameloblasts Stellate Reticulum Odontoblasts Predentin 29 / 51 E is : Odontoblast Stellate Reticulum Inner Dental epithelium Dental papilla Stratum intermedium 30 / 51 E is : Stellate Reticulum Predentin Stratum intermedium Odontoblasts Pre-Ameloblasts 31 / 51 A is : Stratum intermedium Dental papilla Odontoblast Stellate Reticulum Inner Dental epithelium 32 / 51 Yellow arrow refers to : Dental Lamina vestibular lamina Oral Ectoderm Dental Papilla 33 / 51 D is : Stratum intermedium Inner Dental epithelium Stellate Reticulum Dental papilla Odontoblast 34 / 51 D is : Stratum intermedium Stellate Reticulum Predentin Odontoblasts Pre-Ameloblasts 35 / 51 B is : Dental Papilla Dental Sac Enamel Organ 36 / 51 Blue arrow refers to : Stellate Reticulum Inner Enamel Epithelium Outer Enamel Epithelium Stratum Intermedium 37 / 51 B is : Stratum Intermedium Preameloblasts Outer Enamel Epithelium Stellate Reticulum Cervical loop 38 / 51 A is : Dental Sac Enamel Organ Dental Papilla 39 / 51 C is : Dental papilla Inner Dental epithelium Odontoblast Stratum intermedium Stellate Reticulum 40 / 51 What do you see in this section ? Serres’ Pearls Epithelial rest of Malassez Enamel Niche 41 / 51 C is : Predentin Odontoblasts Stratum intermedium Stellate Reticulum Pre-Ameloblasts 42 / 51 A + B + C = Tooth Germ Dental Papilla Dental Organ Tooth Follicle 43 / 51 A is : Stellate Reticulum Preameloblasts Stratum Intermedium Cervical loop Outer Enamel Epithelium 44 / 51 Which stage is this? Bud Stage Dental lamina Stage Cap Stage Bell Stage 45 / 51 This Stage is : Bud Stage Cap Stage Dental Lamina Initial Stage 46 / 51 B is : Outer Enamel Epithelium Dental papilla Inner Enamel Epithelium Stratum intermedium Stellate Reticulum 47 / 51 Which Stage is this : Early Bell Stage Cap Stage Bud Stage Late Bell Stage 48 / 51 A is : Vestibular lamina. Oral epithelium Dental lamina Primary epithelial band 49 / 51 C is : Dental papilla Stellate Reticulum Outer Enamel Epithelium Stratum intermedium Dental sac 50 / 51 C is : Cervical loop Stellate Reticulum Stratum Intermedium Outer Enamel Epithelium Preameloblasts 51 / 51 A is : Ectoderm Flat Cells Columnar Cells Ectomesenchyme Your score is 0% Restart quiz Send feedback By WordPress Quiz plugin