Chapter 2 Abnormalities of Teeth Flashcards
When do crowns of deciduous and permanent teeths start to develop?
Deciduous- 14 weeks gestation to 12 months
Permanent- 6 months to 15 years
What is this?
Turner’s Hypoplasia
Caused by periapical inflammatory disease of the overlying deciduous tooth
Most common in permanent premolars
What is this?
Dental Fluorosis
Major concern is aesthetics
Optimal fluoridation should be around 0.7 ppm
What is this?
Hutchinson’s incisors
Caused by congential syphilis
treponema palidum
Hutchinsons Triad
What is Hutchinson’s Triad?
Hutchinson’s teeth
Interstitial keratitis (corneal scarring)
8th nerve deafness
(could also have saddle nose similar to leprosy)
What are these?
Mulberry molars
Caused by congenital syphilis
What is this?
Dental attrition
Loss of tooth structure caused by tooth to tooth contact
Bruxism
What is this?
Dental Abrasion
Pathologic wearing away of tooth structure (most commonly caused by toothbrushes)
Demastication exhibits features of attrition and abrasion (chewing tobacco between opposing teeth)
What is this?
Erosion
Loss of tooth structure due to a non bacterial chemical process
Erosion caused by exposure to gastric acid is called perimolysis
What is this?
Abfraction
Loss of tooth structure from occlusal stresses that cause repeated tooth flexure
Also know as Non carious cervial lesions
Anodontia
Lack of tooth development
Rare
Occur in the presence of hereditary hypohidrotic ectodermal dysplasia
Hypodontia
Lack of one or more teeth
Is termed oligodontia if 6 or more teeth are missing
Hyperdontia
Supernumerary tooth/teeth
Most common is the maxillary central incisor region and it is termed mesiodens
What is this?
Transposition-abnormal eruption
What is the term when a baby is born with teeth?
Natal teeth
Traumatic ulceration can occur on adjacent soft tissues that occur during breast feeding
Called Riga-Fede disease
What is this?
Ankylosed tooth
No PDL space
Mand 3rd, Max 3rd, Max canine
What is this?
Right number of teeth
Gemination
Single enlarged tooth or joined teeth
What is this?
1 less tooth than normal
Fusion
Single enlarged tooth or joined teeth
What is this?
Concrescence
Union of two adjacent teeth by cementum alone without confluence of underlying dentin
What is this?
Dilaceration
Curved root
What is this?
Dens Evaginatus
What is this?
Dens invaginatus or Dens-in-dente
Permanent maxillary lateral incisors
What is this?
Taurodontism
An enlargement of the body and pulp chamber of a multi-rooted tooth, with apical displacement of the pulpal floor
Could be caused by these sydromes
Kleinfelters (XXY)
Amelogenesis imperfecta
Tricho-dento-osseous sydrome
What is this?
Hypercementosis
Could be caused by Paget’s disease of bone if generalized hypercementosis is present
What are the three types of amelogenesis imperfecta?
Hypoplastic (Pinpoint pits)
Hypocalcified (Enamel is soft and easily worn off, yellow-brown)
Hypomaturation (Snow-capped)
What is this?
Hypoplastic amelogenesis imperfecta
What is this?
Hypomaturation amelogenesis imperfecta
What is this?
Hypocalcified amelogenesis imperfecta
What is this?
Dentinogenesis imperfecta type I
No pulp chamber
Mutaion in DSPP
If it occurs with osteogenesis imperfecta it is termed osteogenesis imperfecta with opalescent teeth
Blue Sclera
Blue-Brown teeth
4 signs via x-ray, Bulbous crown, cervical constriction, thin roots, early obliteration of the root canals and pulp chamber
What is this?
Dentinogenesis imperfecta type II
What is this?
Dentin dysplasia type I
Rootless teeth
What is similar to dentinogenesis imperfecta type I?
Dentin dysplasia type II
bulbous crown
cervial constriction
thin roots
early obliterated root canals and pulp chambers
OR altered pulp anatomy
thistle shaped pulp chambers
pulp stones
What is this?
Regional odontodysplasia
Ghost teeth
non hereditary developmental abnormality
