Orthodontic Terms Lecture 2: Aims of Treatment

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Questions and Answers

What is one of the aims of orthodontic treatments?

Improving the efficiency of the stomatognathic system (correct)

Displacing the condyles in their fossa

Increasing the strain of musculature

Reducing the number of teeth in the mouth

What does 'structural balance' refer to in orthodontic treatments?

Causing imbalance in the skeletal structures

Ignoring the surrounding soft tissue envelop

Maintaining a balance between teeth and surrounding structures (correct)

Prioritizing the correction of teeth over other structures

What is the definition of 'occlusion' in orthodontics?

The relation of maxillary and mandibular teeth when jaws are closed without strain or displacement (correct)

The displacement of maxillary and mandibular teeth when jaws are closed

The alignment of certain teeth without regard for jaw position

The movement of condyles in their fossa during jaw closure

What is an 'ideal occlusion' in orthodontics?

A hypothetical concept based on ideal teeth position and arches relationships Signup and view all the answers

What is the role of orthodontic treatments in relation to esthetic demand?

Increasing the overall esthetic appeal of the individual Signup and view all the answers

What should orthodontic treatment maintain with regard to the affected structures?

Balance between structures, ensuring one correction does not harm another Signup and view all the answers

What is the defining characteristic of an ideal occlusion?

Coincident mid-line Signup and view all the answers

Which type of malocclusion involves abnormal relationship between two teeth or groups of teeth of one arch to the other?

Inter-arch malocclusion Signup and view all the answers

What did Edward H. Angle base his classification of malocclusion on?

The relationship of the mesiobuccal cusp of the maxillary first molar and the buccal groove of the mandibular first molar Signup and view all the answers

What is the defining characteristic of Class II malocclusion according to Angle's classification?

Mesiobuccal cusp of upper first permanent molar occludes mesially to the mesiobuccal groove of the lower first molar Signup and view all the answers

What does normal occlusion imply?

Variations around an average mean value, which deviate from the ideal but are aesthetically acceptable and functionally stable Signup and view all the answers

What is an example of intra-arch malocclusion?

Abnormal inclination of individual teeth Signup and view all the answers

What is considered an abnormal relation in skeletal malocclusion?

Abnormal relationship to the skull Signup and view all the answers

What does Angle's classification of Class I malocclusion entail?

'Neutroclusion' with altered line of occlusion in both arches Signup and view all the answers

Which type of malocclusion involves abnormalities in individual tooth position or a group of teeth within an arch?

'Intra arch' malocclusion Signup and view all the answers

What is the key factor used by Edward H. Angle for his classification of malocclusion?

'Mesiobuccal cusp' of the maxillary first molar Signup and view all the answers

Study Notes

Aims of Orthodontic Treatments

To achieve proper alignment of teeth and jaws for improved function and aesthetics.
To enhance overall oral health by correcting bite issues.

Structural Balance in Orthodontics

Refers to the harmonious relationship between the teeth, jaws, and facial structures.
Essential for optimal dental function and aesthetic appearance.

Definition of Occlusion

The way upper and lower teeth come together during biting or chewing.
Influences dental health, jaw function, and overall comfort.

Ideal Occlusion

Characterized by proper alignment and contact of teeth during occlusion.
Promotes efficient biting and chewing while preventing dental wear.

Orthodontics and Esthetic Demand

Plays a crucial role in enhancing facial aesthetics and confidence.
Addresses both functional and visual aspects of dental alignment.

Maintaining Affected Structures

Orthodontic treatment should preserve the integrity of teeth and supporting structures.
Focuses on maintaining bone, gums, and periodontal health during treatment.

Defining Characteristic of Ideal Occlusion

Complete interdigitation of cusps, allowing for balanced forces during occlusion.
Ensures functional harmony between upper and lower teeth.

Malocclusion Types

Class II malocclusion involves an abnormal relationship between upper and lower teeth.
Identifiable by protruded or retruded jaw positions.

Edward H. Angle's Classification Basis

Based his classification on the relationship of the first molars in each arch.
Established a standard to categorize different types of malocclusion.

Class II Malocclusion Characteristics

Occurs when the lower molars are positioned further back than the upper molars.
Often associated with an overjet or overbite.

Implications of Normal Occlusion

Indicates a balanced interdigitation where upper and lower teeth fit harmoniously.
Suggests a proper functional relationship without significant bite issues.

Example of Intra-arch Malocclusion

Crowding of teeth within a single dental arch.
Results from insufficient space for teeth to align correctly.

Abnormal Relation in Skeletal Malocclusion

Involves significant discrepancies in jaw positions, such as protrusion or retrusion.
Can lead to functional impairments and aesthetic concerns.

Angle's Classification of Class I Malocclusion

Defined by normal relationship of first molars with possible dental irregularities.
Typically includes issues like crowding or spacing but maintains molar relationship.

Individual Tooth Placement Malocclusion

Involves abnormalities in the positioning of individual teeth or groups.
Affects the overall alignment and function but may not involve molar relationships.

Key Factor in Angle's Malocclusion Classification

The positional relationship of the first molars is the founding criterion for identifying malocclusion types.

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