Occlusal Classification Skeletal Classes Quiz

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Questions and Answers

Which classification of occlusion is based on the relationship of the bone of the maxilla to the bone of the mandible?

Class III malocclusion

Skeletal classification (correct)

Type I occlusion

Angle's classification

What is the name given to the classification based on the relationship of the teeth of the mandible to the teeth of the maxilla?

Type III occlusion

Mandibular classification

Class II malocclusion

Dental classification (correct)

In occlusal classification, what is referred to as skeletal classification?

Based on bone relationship

Malocclusion classification (correct)

Dental classification

Type II occlusion

Which of the following is NOT one of the two basic classifications of occlusion?

Type I occlusion Signup and view all the answers

What causes pulp exposure according to the text?

Incisal wear Signup and view all the answers

When is occlusion most stable?

When bones, muscles, and joints are synchronized in balance and harmony Signup and view all the answers

Which classification system is based primarily on the relationship of the permanent first molars?

Angle's classification Signup and view all the answers

In skeletal classification, which class involves a protruded mandible?

Class III Signup and view all the answers

Which class in skeletal classification describes a normal relationship between the maxilla and mandible?

Class I Signup and view all the answers

What is the defining feature of a Class II skeletal classification?

Retruded mandible Signup and view all the answers

Which classification system is the most popular one used in dentistry today?

Angle's classification system Signup and view all the answers

Is it possible to have different classifications on each side according to Angle's classification system?

Yes, it is possible Signup and view all the answers

In an ideal Class I occlusion relationship, where are the lingual cusps of the maxillary teeth positioned in relation to the mandibular teeth?

In the mandibular fossa Signup and view all the answers

According to Angle's classification, what indicates a Class II occlusal relationship?

Buccal groove of mandibular first molar posterior to mesiobuccal cusp of maxillary first molar Signup and view all the answers

What characterizes a Class I occlusal relationship based on occlusal classification?

Mesiobuccal cusp of maxillary first molar in line with buccal groove of mandibular first molar Signup and view all the answers

What is the position of maxillary teeth in an ideal Class I occlusion?

Facial to the mandibular teeth Signup and view all the answers

According to occlusal classification, where should the buccal cusps of maxillary crown be positioned in relation to the mandibular teeth?

Facial to mandibular Buccal cusps Signup and view all the answers

What defines an Angel's class II occlusal relationship?

Buccal groove of mandibular first molar is mesial to mesiobuccal cusp of maxillary first molar Signup and view all the answers

Study Notes

Classification of Occlusion

Skeletal classification is based on the relationship of the bone of the maxilla to the bone of the mandible.
Dental classification is based on the relationship of the teeth of the mandible to the teeth of the maxilla.

Angle's Classification System

This system is based primarily on the relationship of the permanent first molars.
It is the most popular classification system used in dentistry today.
It allows for different classifications on each side.
A Class I occlusal relationship is characterized by the lingual cusps of the maxillary teeth positioned in the buccal groove of the mandibular teeth.
A Class II occlusal relationship is characterized by the maxillary teeth being positioned anterior to the mandibular teeth.
An ideal Class I occlusion is defined by the maxillary teeth being positioned slightly anterior to the mandibular teeth.
In an ideal Class I occlusion, the buccal cusps of the maxillary crown should be positioned in the buccal groove of the mandibular teeth.

Skeletal Classification

Class I skeletal classification describes a normal relationship between the maxilla and mandible.
Class II skeletal classification is characterized by a retrognathic mandible (maxillary teeth positioned anterior to the mandibular teeth).
Class III skeletal classification is characterized by a protruded mandible.

Occlusion Stability

Occlusion is most stable when the teeth are in a position of maximum intercuspation.

Other Facts

Pulp exposure is caused by excessive wear or decay.
There is no classification system based on the relationship of the pulp to the surrounding tissues.

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Description

Test your knowledge on the skeletal classification of occlusal relationships into Class I, Class II, and Class III based on the position of the maxilla and mandible. Identify the characteristics of each class.