a summarize presentation of Dental anomalies - Oral and Maxillofacial Pathology 4th edition 2016 - White and Pharoah’s Oral Radiology: Principles and Interpretation 8th Edition 2019

1. Dental anomalies
Seyed mahdi Sharifi

2. Classification of dental anomalies
acquired
developmental
congenital

3. Number of
teeth
Size of teeth
Morphology
Of teeth
eruptive
pattern of the
teeth01
02
03
04

4. Developmental Abnormalities
01
Number Of teeth

5. in the maxillary third molar area (distodens)
Supernumerary teeth
(Hyperdontia)
Number
Of teeth

6. Supernumerary teeth
Number
Of teeth
Supplemental
rudimentary
Peg – shaped
Tuberculate
molariform

7. Missing teeth
Number
Of teeth
hypodontia
Absence of one
or few teeth
oligodontia
Absence of
numerous teeth
>6
anodontia
Failure of all
teeth develop

8. Missing teeth
Number
Of teeth
absence of maxillary and mandibular second premolars and maxillary canines

9. Missing teeth
Number
Of teeth
Multiple developmentally missing permanent
teeth and several retained deciduous teeth in a female adult. missing maxillary lateral incisors.

10. Rudimentary tooth situated palatal to a maxillary
molar in a patient who also exhibits hypodontia.

11. Developmental Abnormalities
02
Size of teeth

12. macrodontiasize
Of teeth
The teeth are larger than normal

13. microdontia size
Of teeth
reduction in both the size and
the number of cusps in microdontia
of the maxillary third molars
Peg-shaped microdontia of a
maxillary lateral incisor

14. microdontia size
Of teeth
Diffuse Microdontia

15. Developmental Abnormalities
03
Eruption of teeth

16. TranspositionEruption
transposition of the maxillary canines and first premolars

17. Developmental Abnormalities
03
Altered morphology

18. Fusion (synodontia)
Altered
morphology
results from the union of adjacent tooth germs of developing teeth

19. Gemination (twinning)
Altered
morphology
Note the bifid crown and
shared root canal

20. Altered
morphology

21. Concrescence
Altered
morphology
when the roots of two or more primary or
permanent teeth are fused through cementum

22. Concrescence
Altered
morphology
Union by cementum of maxillary second and third molars.
Note the large carious defect of the second molar

23. Taurodontism
Altered
morphology
The bodies of taurodont teeth
appear elongated, and the roots
are short. The pulp chamber
extends from a normal position
in the crown throughout the
length of the elongated body,
resulting in a more apically
positioned pulpal floor.

24. Dilaceration
Altered
morphology
Dilaceration is a disturbance in tooth formation that produces a
sharp bend or curve in the tooth anywhere in the crown or the root.

25. Dilaceration
Altered
morphology
bull’s eye

26. Altered
morphology
Dens Invaginatus, Dens in Dente, and Dilated Odontome

27. Altered
morphology
Dens Invaginatus, Dens in Dente, and Dilated Odontome

28. Altered
morphology
Dens Invaginatus, Dens in Dente, and Dilated Odontome
inverted teardrop outline. Dilated odontome

29. Dens Evaginatus
Altered
morphology
dens is the result of an evagination or outpouching of the enamel organ.

30. Dens Evaginatus
Altered
morphology

31. Amelogenesis Imperfecta
Altered
morphology
Note the absence of interproximal contacts and the “picket fence”-like appearance of the teeth.
hypoplastic

32. hypoplastic
Hypomature
Hypocalcified

33. dentinogenesis Imperfecta
Altered
morphology

34. dentinogenesis Imperfecta
Altered
morphology

35. dentinogenesis Imperfecta
Altered
morphology
Coronal dentin exhibiting short misshapen
tubules within atypical granular dentin
matrix.
bulbous crowns, early obliteration of the
pulp, and enamel hypoplasia.

36. Dentinal Dysplasia
Altered
morphology Type I: Root

37. Dentinal Dysplasia
Altered
morphology Type II : Crown
tube–shaped pulp chambers
and numerous pulp stones.

38. Ectopic enamel
Altered
morphologyEnamel Pearl

39. Cervical enamel extenstion
Ectopic enamel
Altered
morphology

40. hyperplasia of the cingulum of incisor
Talon Cusp
Altered
morphology

41. o Approximately 30% of individuals with congenital syphilis have dental
hypoplasia
o permanent incisors and first molars: Hutchinson incisor , mulberry molars
Congenital syphilis
clinical
feature

42. Resorption
❖ Resorption is the removal of tooth structure by odontoclasts
❖ Etiology: chronic inflammation, excessive pressure and function, or
adjacent tumors and cysts.
Classification: internal / external

43. Internal Resorption
Pink Tooth of Mummery Balloonlike enlargement of the root canal

44. External Resorption
The tooth had been reimplanted
after traumatic avulsionChronic periodontitis

45. This process arose after
initiation of orthodontics
Extensive external resorption of the crown
of the impacted right maxillary cuspid.

46. hypercementosis
Image
feature

47. Cementoblastoma

48. Attrition
Image
feature
loss of coronal tooth height
without pulp exposure in
patient with anterior edge-
to-edge occlusion.

49. nonphysiologic wearing of teeth with a foreign material
Abrasion
Image
feature

51. Erosion
Image
feature
Multiple cupped-out depressions
corresponding to the cusp tips.

52. Abfraction
Image
feature
Deep and narrow enamel cervical defects on the facial surface of the mandibular dentition.

53. A Picture Is Worth a
Thousand Words
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