Human dentition Dr. Hazem Al Ajrami First Year in Dentistry First Semester Al-Azhar University - Gaza

1. ‫بسم‬‫هللا‬‫الرحمن‬‫الرحيم‬

2. College of Dentistry
Human Dentition I
Introduction & Definitions
Dr. Hazem Al Ajrami

3. Dentistry:
Is a healing art and science that is concerned with
the teeth, oral cavity, and associated structures.
Dentist:
One whose profession is to treat diseases and
injuries of the teeth and oral cavity and to
construct and insert restorations of and for the
teeth, jaws, and mouth.

5. Abbreviations

6. D. or Dr.:
Doctor.
D.D.S.:
Doctor of Dental Science; Doctor of Dental
Surgery.

7. B.D.S.:
Bachelor of Dental Surgery.
G.P.:
General Practitioner: licensed dentist who
performs all types of dental treatment.

8. M.D.S.:
Master of Dental Surgery.
Ph.D.:
Philosophiae Doctor.

10. Operative Dentistry (Conservative).
Dental Specialties

12. Operative Dentistry (Conservative).
Endodontics.
Dental Specialties

14. Operative Dentistry (Conservative).
Endodontics.
Periodontology.
Dental Specialties

16. Operative Dentistry (Conservative).
Endodontics.
Periodontology.
Orthodontics.
Dental Specialties

18. Operative Dentistry (Conservative).
Endodontics.
Periodontology.
Orthodontics.
Pedodontics (Pediatric Dentistry).
Dental Specialties

20. Operative Dentistry (Conservative).
Endodontics.
Periodontology.
Orthodontics.
Pedodontics (Pediatric Dentistry).
Prosthodontics.
Dental Specialties

22. Operative Dentistry (Conservative).
Endodontics.
Periodontology.
Orthodontics.
Pedodontics (Pediatric Dentistry).
Prosthodontics.
Oral Surgery.
Dental Specialties

24. Operative Dentistry (Conservative).
Endodontics.
Periodontology.
Orthodontics.
Pedodontics (Pediatric Dentistry).
Prosthodontics.
Oral Surgery.
Dental Radiography.
Dental Specialties

26. Oral Pathology.
Dental Material.
Prevention.
Implantology.
Dental Forensic Medicine.
Geriatric Dentistry.
Dental Specialties

27. Teeth are more than projections in the mouth
that allow you to grind the food and prepare it
for the initial phase of digestive process.
Teeth are one of the most important elements
of the masticatory system.
Man supplied through his life by two sets of
teeth, a deciduous or primary set, and followed
by a permanent set.

28. Functions of Teeth

29. 1 Mastication:
2 It is the most important function of the teeth.
The teeth are designed to perform this
function.
1. Appearance:
2. Well clean teeth with proper alignment give
nice appearance to the face and also support
the facial expressions.

31. 1. Speech:
2. The teeth are important for clear
pronunciation and for production of sound.
3. Growth of jaws:
4. The teeth play a role in the growth of the jaw
in some periods.

34. For Animals:
The first function of the teeth is to hold food and
to kill prey mechanically as the lion or by
chemical poisons as vipers. Other animals use
their teeth in combat as weapons in the struggle
for existence.

35. Dentition: natural teeth in position in the
dental arches.
• Primary dentition.
• Mixed dentition.
• Permanent dentition.

36. Primary dentition (deciduous dentition, first
dentition): that will be shed, teeth that erupt
first and are usually replaced by the permanent
teeth. The primary dentition remains intact until
a child is about 6 years of age, when the
transition to the permanent dentition begins. The
number of primary teeth present in the child is
usually 20 if none are congenitally missing or
lost as a result of disease.
Primary Teeth

37. The eruption of primary teeth is expected to
begin at 6 months of age.
Usually at age 2 to 2.5 years or thereabout, the
primary dentition is completed.
The teeth of girls erupt slightly earlier than those
of boys.
However, the time of eruption of both the
primary and permanent teeth varies greatly.
Variations of six months either side of the usual
eruption dates can be considered normal for a
given child.

39. Usually exists in a person's oral cavity from
approximately 6 to 12 years of age. This mixed
dentition is a combination of primary and
permanent dentition. Mixed dentition occurs as
the permanent teeth begin to erupt within the
oral cavity, while some of the primary teeth
are still present.
Mixed dentition

40. Permanent dentition (secondary dentition): 32
teeth of adulthood that either replace or are
added to the complement of deciduous teeth.
The eruption of permanent teeth is expected to
begin at 6 years of age.
Usually at age 17 to 21 years, the permanent
dentition is completed.
Permanent dentition

41. 20 deciduous teeth
Two arches
called the
DENTAL ARCHES
32 permanent teeth

42. DENTAL ARCHES: one upper and one
lower, each arch contains half the number of
the teeth (10 deciduous then later 16
permanent teeth).
The upper jaw is called MAXILLA upper
or maxillary teeth.
The lower jaw is called the MANDIBLE
lower or the mandibular teeth

43. Maxilla
Mandible

44. Maxillary Teeth
Mandibular Teeth

45. Midsagittal plane: invisible (imaginary)
vertical line or plane that divides the body into
equal right and left portions.

46. Sagittal
Frontal
Horizontal

47. This line also divides each arch into right and
left segments, referred to as QUADRANTS.
Quadrant: one fourth of the total dentition.

49. The permanent teeth are equally arranged or
grouped into four quadrants:
1 Upper Right Quadrant or, Maxillary Right
Quadrant.
2 Upper Left Quadrant or, Maxillary Left
Quadrant.
3 Lower Right Quadrant or, Mandibular Right
Quadrant.
4 Lower Left Quadrant or, Mandibular Left
Quadrant.

52. Types and Forms of
Teeth

53. Incisor.
Canine (or Cuspid).
Molar.
Primary Dentition

55. Incisor.
Canine (or Cuspid).
Premolar (or Bicuspid).
Molar.
Permanent Dentition

58. Incisor: Central and Lateral.
Canine (or Cuspid).
Premolar (or Bicuspid): First and Second.
Molar: First, Second and Third.

61. Thank You