Chapter 2 abnormalities of teeth lecture 2 TEST #1 Flashcards
Aside from lateral incisors what is the second most frequent site of a dens in dente?
-Central incisors
What is the most common form of ectopic enamel?
-Enamel pearl
What can an enamel pearl cause?
-Deep pockets
What is taurodontism?
-Enlargement of the body and pulp chamber of a multi-rooted tooth, with apical displacement of the pulpal floor
What syndromes are taurodontism associated with?
- Kleinfelters Syndrome
- Amelogenesis imperfecta
- Tricho-dento-osseous syndrome
What is the tricho in tricho-dento-osseous syndrome?
-Kinky hair
What is a non neoplastic deposition of excessive cementum that is continuous with the normal radicular cementum?
-Hypercementosis
What can causes hypercementosis?
- Occlusal trauma
- Adjacent inflammation
What is a systemic factor of hypercementosis?
-Paget’s disease of one
What is a developmental alteration in the structure of enamel in the absence of a systemic disorder?
-Amelogenesis Imperfecta
What are three subtypes of amelogenesis imperfecta?
- Hypoplastic (elaboration of the enamel matrix)
- Hypocalcified (Mineralization of the matrix)
- Hypomaturation (maturation of the enamel)
T/F Only deciduous dentitions are involved in amelogenesis imperfecta.
False
-Both deciduous and permanent
When you have the inadequate deposition of enamel matrix what type of amelogenesis imperfecta do you have?
-Hypoplastic
What type of amelogenesis imperfecta has a snow capped appearance?
-Hypomaturation
What type of amelogenesis imperfecta has enamel matrix that is laid down appropriately and begins to mineralize?
-Hypomaturation
What type of amelogenesis imperfecta is when matrix is laid down appropriately but no mineralization occurs?
-Hypocalcified
When enamel starts as yellow-brown or orange and becomes brown to black with rapid calculus apposition what type of amelogenesis imperfecta is that associated with?
-Hypocalcified
What is the mutation of the DSPP associated with?
-Dentinogenesis imperfecta
If osteogenesis imperfecta occurs with dentinogenesis imperfecta what is that termed?
-Osteogenesis imperfecta with opalescent teeth
What dentitions are affected by dentinogenesis imperfecta?
-Both
If a person as blue sclera what is that associated with?
-Osteogenesis imperfecta
If a person appears clinically with a blue hue to their teeth what might they have?
-Dentinogenesis imperfecta
T/F Enamel separates easily from underlying dentin in dentinogenesis imperfecta
True
What are shell teeth?
-Normal thickness enamel with extremely thing dentin and dramatically enlarged pulps (associated with dentinogenesis imperfecta)
What type of dentin dysplasia is closely related to Dentinogenesis imperfecta?
-Type II
What are radiographic feature of dentinogenesis imperfecta?
- Bulbous crowns
- Cervical constriction
- Thin roots
- Early obliteration of root canals and pulp chambers
What type of dentin dysplasia is termed rootless teeth?
-Type I
What type of dentin dysplasia is autosomal dominant?
-Type I and Type II
Clinically how do type I dentin dysplasia teeth appear?
-Normal
Clinically how to type II dentin dysplasia teeth appear?
-Similar to dentinogenesis imperfecta (blueish hue)
What type of dentin dysplasia has normal root length?
-Type II
Type II dentin dysplasia can have altered pulpal anatomy, what does that appear as?
-Thistle-tube shaped (hot dog on a stick)
What is regional odontodysplasia?
-“ghost teeth” a localized non-hereditary developmental abnormality of teeth with extensive adverse effects on the formation of enamel, dentin, and pulp
