Classification of Malocclusion Flashcards

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Questions and Answers

What does the term 'Mesognathic' refer to?

A classification of facial profile in which the maxilla and mandible are in harmony.

What does the term 'Retrognathic' imply?

A classification where the mandible is positioned farther back than the maxilla.

What is indicated by the term 'Prognathic'?

A classification where the mandible is positioned farther forward than the maxilla.

What is Class I Occlusion?

Normal occlusion where the bite is aligned and teeth fit together correctly. Signup and view all the answers

What characterizes Class II Occlusion (Division 1)?

The first molar of the mandibular arch is positioned behind the first molar of the maxillary arch. Signup and view all the answers

What defines Class II Occlusion (Division 2)?

The first molar is in the same position as in Division 1 but with retruded maxillary incisors. Signup and view all the answers

What is described by Class III Occlusion?

The first molar of the mandibular arch is positioned ahead of the first molar of the maxillary arch. Signup and view all the answers

What does 'Posterior Crossbite' refer to?

A condition where posterior teeth are buccal or lingual to their normal position. Signup and view all the answers

Define 'Anterior Crossbite'.

Maxillary anterior teeth are lingual to their normal position. Signup and view all the answers

What is an 'Open Bite'?

A condition where maxillary anterior teeth do not overlap or contact the mandibular teeth. Signup and view all the answers

What is meant by 'Tongue Thrust'?

Placing the tongue in the wrong position during swallowing. Signup and view all the answers

What does 'Edge to Edge Occlusion' mean?

Anterior teeth's incisal surfaces of maxillary and mandibular teeth meet. Signup and view all the answers

What is 'End to End Occlusion'?

Cusps of maxillary teeth occlude with mandibular teeth. Signup and view all the answers

Define 'Normal Overbite'.

Incisal edges of the maxillary teeth are within the incisal third of the facial surfaces of the mandibular teeth. Signup and view all the answers

What is a 'Moderate Overbite'?

Incisal edges of the maxillary teeth are within the middle third of the facial surfaces of the mandibular teeth. Signup and view all the answers

What signifies 'Severe Overbite'?

Incisal edges of the maxillary teeth are within the cervical third of the facial surfaces of the mandibular teeth. Signup and view all the answers

What is 'Overjet'?

The horizontal distance between the incisal edges of the maxillary teeth and the mandibular teeth. Signup and view all the answers

Define 'Underjet'.

Maxillary incisors are lingual to mandibular incisors. Signup and view all the answers

What does 'Infraversion' indicate?

A tooth that is depressed below the line of occlusion. Signup and view all the answers

What is 'Labioversion'?

A tooth that has assumed a position labial to normal. Signup and view all the answers

Define 'Linguoversion'.

A tooth that has assumed a position lingual to normal. Signup and view all the answers

What does 'Supraversion' refer to?

A tooth that is elongated above the line of occlusion. Signup and view all the answers

What is 'Buccoversion'?

A tooth that has assumed a position buccal to normal. Signup and view all the answers

What does 'Torsoversion' mean?

A tooth that is turned or rotated. Signup and view all the answers

Study Notes

Malocclusion Classification Terms

Mesognathic: Characterized by a normal or straight profile where the jaws are aligned.
Retrognathic: A condition in which the mandible is positioned behind the maxilla, often leading to an underbite.
Prognathic: Refers to a condition where the mandible protrudes forward relative to the maxilla, resulting in an overbite.

Occlusion Classes

Class I Occlusion: Normal occlusion where the first molars interdigitate properly, with a slight overbite.
Class II Occlusion (Division 1): First molars are positioned further back; characterized by protruded maxillary incisors creating an overbite.
Class II Occlusion (Division 2): Similar molar positioning as Division 1 but with retroclined maxillary incisors and a deep overbite.
Class III Occlusion: First molars are positioned more towards the front, often described as having an underbite.

Types of Crossbites

Posterior Crossbite: Occurs when the posterior teeth are positioned buccal or lingual to their normal occlusion.
Anterior Crossbite: Maxillary anterior teeth are positioned lingually to the mandibular anterior teeth, disrupting normal bite.

Bite Types

Open Bite: There is no contact between maxillary anterior teeth and mandibular teeth, with no overlap.
Edge to Edge Occlusion: Maxillary and mandibular anterior teeth meet at their incisal edges, rather than overlapping.
End to End Occlusion: Cusp tips of maxillary teeth touch the cusp tips of mandibular teeth.

Overbite Measurement

Normal Overbite: Maxillary incisor edges align within the incisal third of the mandibular incisors.
Moderate Overbite: Incisor edges are located within the middle third of the mandibular teeth.
Severe Overbite: Incisal edges extend into the cervical third of the facial surfaces of the mandibular teeth.

Overjet and Underjet

Overjet: Horizontal distance between the labial surfaces of maxillary incisors and the incisal edges of mandibular incisors, measured using a periodontal probe.
Underjet: Condition where maxillary incisors are located lingually to the mandibular incisors.

Tooth Positioning Terms

Infraversion: Tooth is positioned below the established line of occlusion.
Labioversion/Buccoversion: A tooth that has moved to a position labial or buccal to its normal alignment.
Linguoversion: A tooth positioned lingual to the normal alignment.
Supraversion: Elongation of a tooth above the occlusion line.
Buccoversion: Similar to labio- and linguoversion, but specifically refers to a tooth positioned buccal to its normal location.
Torsoversion: A tooth that is turned or rotated from its normal position.

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Description

Test your knowledge on the classification of malocclusion with these flashcards. This quiz covers important terms such as mesognathic, retrognathic, and various classes of occlusion. Perfect for dental students or professionals looking to refresh their understanding.