Orthodontics Overview: Crossbites and Occlusion

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Questions and Answers

What does buccal overjet measure?

The distance between the buccal surfaces of the maxillary posterior teeth and their palatal antagonists.

The distance between the lingual surfaces of the maxillary anterior teeth and the mandibular anterior teeth.

The distance between the buccal surfaces of the maxillary posterior teeth and the buccal surfaces of their mandibular antagonists. (correct)

The distance between the incisal edges of the maxillary and mandibular incisors.

Which surfaces are involved in the measurement of buccal overjet?

Buccal surfaces of maxillary posterior teeth. (correct)

Lingual surfaces of maxillary anterior teeth.

Palatal surfaces of mandibular teeth.

Incisal edges of maxillary posterior teeth.

Buccal overjet is primarily associated with which type of teeth?

Maxillary anterior teeth.

Mandibular anterior teeth.

Mandibular posterior teeth.

Maxillary posterior teeth. (correct)

In what context is buccal overjet typically measured?

During orthodontic assessment. Signup and view all the answers

What is the primary function of measuring buccal overjet?

To evaluate dental occlusion and alignment. Signup and view all the answers

What does infraposition refer to in dentistry?

Teeth positioned below the occlusal plane Signup and view all the answers

Which factor is commonly associated with infraposition?

Deleterious habits Signup and view all the answers

Infraposition can be the result of which dental condition?

Ankylosis Signup and view all the answers

Which of the following describes a group of teeth experiencing infraposition?

They are positioned below the occlusal plane Signup and view all the answers

What is the potential cause of infraposition that is considered a bad habit?

Thumb sucking Signup and view all the answers

What characterizes dental retrusion?

Teeth are in a posterior position but maintain normal long axis inclination. Signup and view all the answers

How does dental retroclination differ from dental retrusion?

Retroclination involves tipping of teeth in the labio-lingual direction. Signup and view all the answers

Which statement accurately describes the long axis of teeth during dental retroclination?

The long axis is tipped labio-lingually. Signup and view all the answers

In dental retrusion, which alignment is maintained?

The long axis inclination remains normal. Signup and view all the answers

What is the result of dental retroclination on the positioning of teeth?

Teeth are positioned posteriorly and tipped labio-lingually. Signup and view all the answers

What is dental proclination?

Anterior positioning of a tooth with its long axis tipped labially Signup and view all the answers

Which statement best describes a tooth that is retrusive?

It is positioned too far posteriorly but retains a normal inclination. Signup and view all the answers

Which of the following concepts is incorrect concerning tooth inclination?

Retroclination occurs when a tooth is positioned more anteriorly. Signup and view all the answers

What is a true unilateral posterior crossbite characterized by?

Asymmetry present in the dental arch Signup and view all the answers

Which of the following statements is true regarding unilateral posterior crossbites?

They affect only one side of the dental arch. Signup and view all the answers

What characterizes a tooth that is retroclined?

Its long axis is tipped lingually Signup and view all the answers

How can dental prosecution be identified in a dental assessment?

By the anterior positioning with labial tipping of the long axis Signup and view all the answers

What is a common consequence of true unilateral posterior crossbite?

No associated mandibular deviation Signup and view all the answers

In the context of dental conditions, what does unilateral refer to?

Affecting only one side Signup and view all the answers

Which factor is least likely to cause a true unilateral posterior crossbite?

Regular dental observations Signup and view all the answers

Study Notes

Buccal Overjet

Distance measured between the buccal surfaces of maxillary posterior teeth and their mandibular antagonists.
Can be classified into unilateral and bilateral presentations.

Unilateral Posterior Crossbite

Affects only one side of the dental arch.
True unilateral posterior crossbite: Resulting from asymmetrical dental arch, typically not linked to mandible deviation.

Infraposition (Infra Occlusion)

Refers to a tooth or group of teeth positioned below the occlusal plane.
Commonly arises from harmful habits or ankylosis.

Dental Retrusion

Condition where a tooth or group of teeth are positioned posteriorly.
Maintains normal long axis inclination despite being located further back.

Dental Retroclination

Involves a tooth or group of teeth being positioned posteriorly while their long axis tips labio-lingually.
A retrusive tooth can exist without being retroclined if it is positioned too far back with normal inclination.

Dental Proclination

Refers to the anterior positioning of a tooth or a group of teeth.
The long axis of teeth is tipped labially during this positioning.

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Description

This quiz covers key concepts in orthodontics, focusing on buccal overjet, unilateral posterior crossbite, and infraposition. It explores conditions such as dental retrusion and retroclination, providing a comprehensive understanding of dental alignment issues. Test your knowledge on the classification and implications of these dental conditions.