The document discusses developmental abnormalities that can affect the teeth and facial skeleton. It describes abnormalities in the number, structure, size, shape, and position of teeth as well as skeletal anomalies of the mandible, maxilla, and other rare developmental diseases and syndromes. The major categories of developmental abnormalities covered include anomalies of the teeth (such as missing teeth, additional teeth, structural defects), abnormalities in size (macrodontia, microdontia), shape (fusion, gemination, taurodontism), position (delayed eruption, transposition), and skeletal anomalies (micrognathia, prognathism, cleft lip and palate).
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
Characteristics and features of developmental, hereditary and congenital disorders affecting the teeth and other hard tissues. Genetic concepts of development and role of teratogens on developing tissues,
Developmental Disturbances of Oral & Paraoral structures-3 /prosthodontic cou...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Etiology of malocclusion /certified fixed orthodontic courses by Indian dent...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
developmental disturbances of teeth
DEVELOPMENTAL DISTURBANCES IN NUMBER OF TEETH
DEVELOPMENTAL DISTURBANCES IN SIZE OF TEETH
DEVELOPMENTAL DISTURBANCES IN SHAPE OF TEETH
Anodontia
Supernumerary teeth
Predeciduous dentition
Post permanent dentition
Microdontia
Macrodontia
Gemination
Fusion
Concrescence
Dilaceration
Talon cusp
Taurodontism
Supernumerary roots
2. • There are many developmental abnormalities
that can affect the teeth and facial skeleton. In
most cases, clinicians need little more than to
be able to recognize these abnormalities
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10. Missing teeth
• Localized anodontia or hypodontia — usually
third molars, upper lateral incisors or second
premolars.
• Anodontia or hypodontia associated with
systemic disease — e.g. Down's syndrome,
ectodermal dysplasia.
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23. Acquired defects
• Turner teeth — enamel defects caused by
infection from overlying deciduous predecessor
• Congenital syphilis — enamel hypoplastic and
altered in shape (see below)
• Severe childhood fevers, e.g. measles — linear
enamel defects
Fluorosis — discolouration or pitting of the
enamel
• Discolouration — e.g. tetracycline staining.
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31. Anomalies affecting -whole teeth
• Fusion — two teeth joined together from the
fusion of adjacent tooth germs
• Gemination — two teeth joined together but
arising from a single tooth germ
• Concrescence — two teeth joined together by
cementum
• Dens-in-dente (invaginated odontome) — in
folding of the outer surface of a tooth into the
interior usually in the cingulum pit region of
maxillary lateral incisors.
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39. Anomalies affecting roots and or pulp
canals
• Number — additional roots, e.g. two-rooted
incisors, three-rooted premolars or four-rooted
molars
• Morphology, including:
— Bifid roots
— Excessively curved roots
— Dilaceration — sharp bend in the root
direction
— Taurodontism — short, stumpy roots and
longitudinally enlarged pulp chambers
Pulp stones — localized or associated with
specific syndromes, e.g. Ehlers-Danlos (floppy
joint syndrome).
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45. Odontomes
• Enameloma/enamel pearl
• Cementoma (see fibro-cemento-osseousmesions in
— Benign cementoblastoma (true cementoma)
— Periapical cemento-osseous dysplasia
— Focal cemento-osseous dysplasia
— Florid cemento-osseous dysplasia
(gigantiform cementoma)
• Composite
— Compound odontome — made up of one or more small
tooth-like denticles
— Complex odontome — complex mass of disorganized dental
tissue.
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51. Delayed eruption
• Local causes
— Loss of space
— Abnormal crypt position — especially 8/8 and 3/3
— Overcrowding
— Additional teeth
— Retention of deciduous predecessor
— Dentigerous and eruption cysts
• Systemic causes
— Metabolic diseases, e.g. cretinism and rickets
— Developmental disturbances, e.g. cleidocranial dysplasia
— Hereditary conditions, e.g. gingival fibromatosis and
cherubism.
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52. Other positional anomalies
• Transposition two teeth occupying exchanged positions
• Wandering teeth, movement of unerupted
teeth for no apparent reason (distal drift)
• Submersion, second deciduous molars apparently descend into the
jaws. Since these teeth do not in fact submerge, but rather remain in
their original position while the adjacent Other positional anomalies
• Transposition, two teeth occupying exchanged positions
• Wandering teeth, movement of unerupted teeth for no apparent
reason (distal drift)
• Submersion, second deciduous molars apparently descend into the
jaws. Since these teeth do not in fact submerge, but rather remain
in their original position while the adjacent
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57. Abnormalities of the mandible or
maxilla
• Micrognathia
• Macrognathia (prognathism)
• Other mandibular anomalies
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58. Micrognathia
• True micrognathia — usually caused by bilateral
hypoplasia of the jaw or agenesis of the condyles
• Acquired micrognathia — usually caused by unilateral
early ankylosis of the temporomandibular joint.
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64. Cleft lip and palate
• Cleft lip
— Unilateral, with or without alveolar ridge
— Bilateral, with or without alveolar ridge
• Cleft palate
— Bifid uvula
— Soft palate only
— Soft and hard palate
• Clefts of lip and palate (combined defects)
— Unilateral (left or right)
— Cleft palate with bilateral cleft lip.
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