Quiz Questions Flashcards
T/F: during termination of amelogenesis the initial Dentogingival junction forms. Why?
True. 
T/F the epithelial-mesenchyme interaction is reaponsible for odontogenesis. Why?
True. Mesenchyme interacts with the dental papilla and enamel organ at different stages to induce various stages in odontogenesis like the fornation of pre-ameloblasts and pre-odontoblasts
T/F. Aprismatic enamel forms prior to mantle Dentin
False
Mantle Denton always forms first. Aprismatic enamel forms second
T/F The membrane preformative replaces the DEJ
False
The membrane performative is another name for the basement membrane. The DEJ replaces the membrane performative/basement membrane
T/F Epidermoid cyst usually lies between the branchial arches
False
Epidermoid cysts occur in the floor of the mouth. Branchial cysts lie between the second and third Branchial arches
What structure is responsible for cusp formation? What is it composed of?
The enamel knot. Composed of a mass of stellate reticulum, signals cusp formation
What will the primary dental lamina give rise to?
The enamel Organ. Dental lamina is an epithelial band that gives rise to tooth buds/enamel organs
Derived from ectoderm
What will the dental papilla give rise to?
Dentin and pulp. Why is inside the enamel organ concavity. Derived from Neuroectoderm
What does He rtwigs epithelial root sheath induce to form odontoblasts?
The dental Papilla. Located inside the enamel organ concavity
At the future site of what structure is the epithelial diaphragm located?
The apical foramen
The epithelial diaphragm is stationary and forms the future apical foramen
What does the cervical loop form?
The cementoenamel junction
What forms during the bell stage of tooth development?
Preameloblasts
Stratum intermedium
Pre-odontoblast
Dental laminate of the permanent molars
Does the cervical loop form during the bell stage?
No. Forms during the Stage
What may arise from the cell rests of serres?
May form cysts. These cell rests form during the bell stage
Which cells will histodifferentiate and give rise to preameloblasts
Inner enamel epithelium
What is the Dentin that forms the Dentin tubules called?
Peritubular Dentin.
What does the Hyaline layer of Hopewell Smith cover?
Root dentin (mantle)
Which cells is calcium hydroxyapatite utilized in radicular Dentin mineralization derived from?
Odontoblast. Matrix vesicles/calcium hydroxyapatite form Dentin
Odontoblast are involved in the formation of all Dentin
What is the acceptable INR range for treating a patient on blood thinners?
0.8-1.1
What induces and synchronizes the development of the neural tube?
The notochord process
What does the philtrum of the upper lip form from?
Intermaxillary segment– fusion of the maxillary process with the lateral borders of the center portion of the upper lip
What can happen when the branchial grooves fail to fuse?
A cervical cyst may form
What type of ions are utilized in muscle contractions?
Calcium ions
Which portion of teeth are directly affected by core bundles that innervate the mandible?
Anterior teeth
What do Schwann cells produce?
Myelin
Bilaminar germ disc forms when embryoblast cells give rise to what?
Epiblasts and hypoblasts
Where do proliferating cells enter during formation of the trilaminar germ disc?
Primitive groove
Which dental tissues do neural crest cells of the head give rise to?
Cementum, dentin, PDL, pulp
Are there blood vessels in the stratum germinativum? Why?
No. Stratum germinativum is the deepest layer of SSE. There are no blood vessels in stratified squamous empithelium
