IT IS INTRODUCTION IN DETAIL

1. INTRODUCTION
BY:INSHA .ILHAM

2. DEFINITION:
Occlusion: The normal relation of the occlusal inclined
planes of the teeth when the jaws are closed .
Malocclusion:It is a misalignment or incorrect relation
between the teeth of two dental arches when they
approach each other as the jaws closed.
Classification of malocclusion:-
Advantaged:
1.Helps in diagnosis and treatment planning .
2.Helps in visualizing and understanding the problem
associated with that malocclusion.
3.Helps in communicating the problem .
4.Comparison of various malocclusion is made easy by
classification.

3. Types of malocclusion and their
terminologies:
 Intra-arch malocclusions.
 Inter-arch malocclusions.
 Skeletal malocclusions.
 1. Intra-arch malocclusions include :variation in
individual tooth position and malocclusion affecting a
group of teeth within an arch.
 Distal inclination or distal tipping.
 Mesial inclination .
 Lingual inclination or retroclination.
 Buccal inclination or proclination.
 Mesial displacement .
 Distal displacement.
 Lingual displacement.
 Buccal displacement.

5.  Rotations
 Disto lingual or mesio buccal rotation
 Mesio lingual or disto buccal rotation.
 Transposition.
 Supraversion.
 Infraversion.
 2. INTER-ARCH MALOCCLUSION:
 These inter-arch malocclusion can occur in sagittal ,vertical
or the transverse plane.
 1.Sagittal plane malocclusions : upper and the lower arches
are abnormally related to each other in a sagittal plane.
 A.Prenormal occlusion: lower arch is more forwardly placed
when the patient bites in centric occlusion.
 B.post normal occlusion: lower arch is more distally placed
when patient bites in centric occlusion.

6. PRENORMAL OCCLUSION. NORMAL O. POST NORMAL O.

7.  2. Vertical plane malocclusions:
 Deep bite .(excessive vertical overlap b/w u n l anteriors)
 Open bite.(no vertical overlap)

8.  3. Transverse plane malocclusion. It includes various
types of crossbite.

9.  3. SKELETAL MALOCCLUSION.
 It is caused due to abnormalities in maxilla and mandible
. It can be in size,position,or relationship between the
jaws .it can also occur in 3planes i.e., sagittal,vertical n
transverse plane
 In transverse plane theses skeletal malocclusion is
termed in terms ofcrossbite ..as narrow maxilla ...wide
mandible etc.,
 In sagittal in termed of Retrognathism and Prognathism.
 In vertical plane abnormal variations can be in affect to
the lower facial height.