Chapter 2 Flashcards
When do the crowns of deciduous teeth develop?
~14th week gestation through 12 months of age
When do crowns of permanent dentition develop?
~6months to 15 years
What is the term for teeth that have enamel defects seen in the permanent teeth caused by periapical inflammation of the overlying deciduous tooth?
Turner’s hypoplasia
When is the critical period for children developing dental fluorosis?
2nd and 3rd year of life.
Congenital syphilis can cause what type of odontogenic malformations?
Hutchinson’s incisors. The teeth will have a straight-edge screwdriver shape and the molars will be “mulberry molars.”
What is the triad of congenital syphilis?
Hutchinson teeth, interstitial keratitis, and 8th nerve deafness.
How would you ID these teeth?
Hutchinson Incisors
How would you ID these teeth?
Mulberry Molars
What is attrition?
Wear of teeth due to tooth to tooth contact.
What is abrasion?
Wear of teeth due to pathologic wearing IE tooth brush.
What is demastication?
Wear of teeth due to attrition and abrasion. IE chewing tobacco.
What is erosion?
Wear of teeth due to a nonbacterial chemical process.
What is perimolysis?
Wear of teeth due to gastric secretions.
What is the term when teeth are fused by cementum?
Concrescence.
What is anodontia?
Lack of tooth development.
What is hypodontia?
Lack of one or more teeth.
What is oligodontia?
Lack of 6+ teeth.
List the most common teeth affect by hypodontia.
3rd molars, 2nd premolars, lateral incisors.
What is a paramolar?
Devloping 4th molar.
What is a mesiodens?
Supernumerary tooth inbetween maxillary incisors.
What is it called when two teeth switch position during eruption?
Transposition.
What are the most commonly impacted teeth?
Mand. 3rd molars, Max. 3rd molars, and Max. canine.
What is gemination?
Single enlarged tooth. Looks like it is splitting into two. Tooth count will be normal when it is counted as one tooth.
What is fusion?
Single enlarged tooth. Tooth count will be low when the tooth is counted as one.
What is Riga fede disease?
Tramatic ulcers of soft tissue that may occur during breast feeding.
What is this?
Riga fede disease
What is this?
Talon Cusp
What is dens evaginatus?
Elevation of the enamel located in the central groove of a tooth, often in the premolars. Very common in native americans and Inuits.
What is this?
Dens evaginatus
What is dens-in-dente?
Known as a tooth within a tooth. Deep surface invagination of the crown or root that is lined by enamel.
What is the frequency of dens-in-dente?
Lateral incisors, central incisors, premolars, caninies, molars.
What is this?
Dens-in-dente
What is taurodontism?
An enlargement of the body and pulp chamber of a multi-rooted tooth.
What are the three syndromes associated with taurodontism?
Kleinfelters Syndrome. Amelogenesis imperfect. Tricho-dento-osseous syndrome.
What are the four aspects to tricho-dento-osseous syndrome?
Taurodontism, kinky hair, brittle nails, and osteosclerosis.
What is this?
Hypercementosis
What is hypercementosis?
non-neoplastic deposition of excessive cementum that is continuous with the normal radicular cementum.
What disease is strongly associated with hypercementosis?
Paget’s Disease.
What direction will a dilaceration usually present?
Distal
What are the three forms of amelogenesis imperfecta?
Hypoplastic, hypocalcified, and hypomaturation.
What are the characteristics of the hypoplastic form of amelogenesis imperfecta?
It is the inadequate deposition of enamel matrix. Teeth will typically be more brown/yellow in color due to lack of enamel.
What are the characteristics of the hypomaturation form of amelogenesis imperfecta?
It is when the enamel matrix is laid down appropriately, but there is a defect in the maturation of the crystal structure. The enamel will be soft and chips away with the “snow capped” teeth.
What are the characteristics of the hypocalcified form of amelogenesis imperfecta?
This is when the enamel is laid down appropriately, but there is no mineralization.
What is causing this?
Hypoplastica amelogenesis imperfecta
What is causing this?
Hypoplastic amelogenesis imperfecta.
What is causing this?
Hypomaturation amelogenesis imperfecta.
What is causing this?
Hypomaturation amelogenesis imperfecta
What is causing this?
Hypocalcified amelogenesis imperfecta
What is causing this?
Hypocalcified amelogenesis imperfecta
What causes dentinogenesis imperfecta?
Mutation of the dentin sialophosphoprotein gene.
What is dentinogenesis imperfecta called when it occurs with osteogenesis imperfecta?
How will patients eyes appear?
Osteogenesis imperfecta with opalescent teeth.
Blue sclera
How will the radiographs look with dentinogenesis imperfecta?
Bulbous crowns, cervical constrictions, thin roots, and early obliteration of canals and chambers.
What is causing this?
Dentinogenesis imperfecta
What is causing this?
Dentinogenesis imperfecta
What are the characteristics of dentin dysplasia Type I
The crowns will appear normal, but the teeth will be rootless.
What are the characteristics of dentin dyplasia type II?
It is closely related to dentinogenesis imperfecta(cant tell the difference). Root length is normal. On radiograph, will have thistle shaped chamber and canal anatomy.
What is the term for a localized, non-hereditary developmental abnormality of the teeth with extensive adverse effects on the formation of enamel, dentin, and pulp?
Regional odontodysplasia.
What is causing this? (note: it is only happening in a single quadrant.)
Regional odontodysplasia.
