Lab 2.2 Classifications of Malocclusion (Excluding those already mentioned in 2.1) Flashcards
Aids in the diagnosis and treatment planning of malocclusions by orienting the clinician to the type and the magnitude of the problems and possible mechanical solutions to the problems.
Classification
The relation of maxillary and mandibular teeth when the jaws are closed in a centric relation without strain of musculature or displacement of condyles in their fossae.
Occlusion
It is a pre-conceived theoretical concept of occlusal structures and functional relationships that include idealized principles and characteristics that an occlusion should have.
Ideal occlusion
It is some deviation from that of ideal but is aesthetically acceptable and functionally stable for the individuals.
Normal occlusion
The upper and lower teeth fit nicely and evenly together with the least amount of destructive interferences.
Normal occlusion
Defined as a condition where there is departure from the normal relation of the teeth to the other teeth in the same dental arch or teeth in opposing arch.
Malocclusion
An occlusion in which there is a malrelationship between the arches in any of the planes of the spaces or in which there are anomalies in tooth position beyond the limit of normal.
Malocclusion
It is a condition that reflects an expression of normal biologic variability in the way the maxilla and mandible teeth occlude
Malocclusion
The term ‘malocclusion’ was coined by?
Edward Angle
Key 1
The mesio-buccal cusp of the upper first molar should occlude in the ______ between the mesial and medial buccal cusp of the lower first molar.
Key 2
The gingival part of the long axis of the crown must be _____ to the occlusal part of the line
Key 3
The maxillary incisors exhibit a ________ crown inclination while the mandibular incisors show a very mild ______ crown inclination. The maxillary and mandibular posteriors have a ________ crown inclination.
Key 4
Normal occlusion is characterized by ________ of any rotation.
Key 5
To consider an occlusion as normal,
there should be ___________ between adjacent teeth.
Key 6
A normal occlusal plane according to Andrews should be _______, with the curve of Spee not exceeding _________.
- groove
- distal
- postive; negative; negative
- absence
- tight contact
- flat; 1.5 mm
3 types of malocclusion?
- Intra-arch
- Inter-arch
- Skeletal
It include variations in individual tooth position or a group of teeth within an arch.
Intra-arch malocclusion
It compromise of malrelationship between two teeth or group of teeth of one arch to another arch.
Intra-arch malocclusion
It involves the apical upper and lower bony bases.
Skeletal malocclusion
Intra-arch malocclusion include? (3)
- Abnormal inclination.
- Abnormal displacement.
- Spacing and crowding within same arch.
This is a condition where the crown of tooth is tilted or inclined mesially.
Mesial inclination.
Refers to a condition where the crown is tilted or inclined distally.
Distal inclination
This is an abnormal lingual or palatal tilting of tooth.
Lingual inclination / retroclination
This refers to labial or buccal inclination of tooth.
Labial inclination / proclination
This refers to a tooth that is bodily moved in a mesial direction towards the midline.
Mesial displacement
This refers to a tooth that is bodily moved in a distal direction away from the midline.
Distal displacement
This is a condition where the entire tooth is displaced in lingual direction
Lingual displacement
This is a condition where the tooth is displaced bodily in labial or buccal direction.
Buccal displacement
This is a condition in which a tooth that has over erupted as compared to other teeth in the arch.
Extrusion / supra-version
Refers to a tooth that has not erupted enough as compared to other teeth in the arch.
Intrusion / infra-version
This describes a tooth that has rotated around its long axis so that the distal aspect is more lingually placed.
Disto-lingual / Mesio-buccal rotation
This is a condition where the tooth has rotated around its long axis so that the mesial aspect is more lingually placed.
Mesio-lingual / Disto-buccal rotationThis term describes a condition where two teeth have exchanged places.
This term describes a condition where two teeth have exchanged places.
Transposition