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?

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

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

    <p>Increasing the overall esthetic appeal of the individual</p> Signup and view all the answers

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

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

    What is the defining characteristic of an ideal occlusion?

    <p>Coincident mid-line</p> 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?

    <p>Inter-arch malocclusion</p> Signup and view all the answers

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

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

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

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

    What does normal occlusion imply?

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

    What is an example of intra-arch malocclusion?

    <p>Abnormal inclination of individual teeth</p> Signup and view all the answers

    What is considered an abnormal relation in skeletal malocclusion?

    <p>Abnormal relationship to the skull</p> Signup and view all the answers

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

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

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

    <p>'Intra arch' malocclusion</p> Signup and view all the answers

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

    <p>'Mesiobuccal cusp' of the maxillary first molar</p> 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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