Optimal Force of Extraoral Appliance on Maxilla
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Questions and Answers

What is the optimal magnitude of force that is developed from the extraoral appliance on the maxilla?

  • Tooth shape and size discrepancies
  • Between 400 – 600 gr per side (correct)
  • Between 50 – 70 gr per side
  • Over 1500 gr per side

Which dentition and which groups of teeth are most affected from change in the tooth shape and size?

  • Only the primary teeth are affected
  • Only the group of the premolars
  • -Incisors and Canines
  • Both primary and permanent dentition are affected but most often - the incisors (correct)

What do we observe extraorally and intraorally when there is tooth size discrepancy?

  • Extraorally – increase in the size of the mouth, intraorally – teeth with irregular structure
  • Extraorally – small mouth size, intraorally – small dental arches (correct)
  • Extraorally – usually no change, intraorally – teeth with alteration in their size
  • -Extraorally – large chin size, intraorally – crowded teeth

What is the name of the discrepancy when the teeth differ in their size according to the standard norm?

<p>Microdontia – when the teeth have smaller size, macrodontia – when the teeth have bigger size (D)</p> Signup and view all the answers

To which dento-facial deformities does the tooth size and shape discrepancies belong?

<p>Discrepancy between the size of the dental arch and the size of the skull (C)</p> Signup and view all the answers

What could be an etiological factor for diastema according to the text?

<p>Macrodontia (A)</p> Signup and view all the answers

Which reason can be an etiological factor for diastema in the mandible based on the text?

<p>Tongue thrust (C)</p> Signup and view all the answers

Why can a 5 mm or more diastema occur?

<p>Hypodontia of upper lateral incisors (D)</p> Signup and view all the answers

In which type of dentition would a diastema up to 3 mm typically be treated according to the text?

<p>Primary dentition (C)</p> Signup and view all the answers

Which treatment can be used for closure of a diastema as per the text?

<p>Protrusion of the incisors (A)</p> Signup and view all the answers

Which definition accurately describes constriction and endognathia based on the text?

<p>Constriction is considered a deviation of the individual jaw characterized by a narrowing of the dental arch, endognathia is a narrowing of the jaw. (D)</p> Signup and view all the answers

What is the main etiology of constriction?

<p>Lack of balance between the outer and inner oral muscles (C)</p> Signup and view all the answers

Which clinical symptoms are seen extraorally in severe constriction?

<p>The face is narrow, the lower facial height is reduced, vermilion thickness is reduced (A)</p> Signup and view all the answers

What are the intraoral clinical symptoms of severe constriction in the upper jaw?

<p>Upper dental arch with abnormal shape, frontal teeth crowded or buccally inclined, Gothic palate (D)</p> Signup and view all the answers

How is constriction diagnosed using biometric methods?

<p>Measuring the length of the 'support zone' - Moyers’ method (C)</p> Signup and view all the answers

In a differential diagnosis, constriction is distinguished from:

<p>Retrusion (B)</p> Signup and view all the answers

What is a preventive measure for constriction?

<p>Removing harmful habits and restoring balance between intra and extra oral muscles (D)</p> Signup and view all the answers

What is a factor that causes retromandibulia?

<p>Improper bottle feeding; harmful habits – mouth breathing, finger and lower lip sucking (D)</p> Signup and view all the answers

What characterizes the extraoral status in skeletal class II?

<p>The profile is convex, pronounced negative lip step, the nasolabial angle is reduced (A)</p> Signup and view all the answers

How is the differential diagnosis made for class II deformation?

<p>Between the prognathia and the progenia - based on ANB and SNB angles (A)</p> Signup and view all the answers

What is the prevention method for class II deformation?

<p>Blocking the growth of the upper jaw from an early age before the eruption of primary teeth (A)</p> Signup and view all the answers

What is the main reason for lack of contact between the upper and lower incisors in a deep-bite deformation?

<p>Heavy overjet (C)</p> Signup and view all the answers

How is the extraoral status characterized in deep-bite deformation?

<p>The lower facial height is reduced, with deepened nasolabial folds and emphasized supramental fold (B)</p> Signup and view all the answers

What characterizes the intraoral status in deep-bite deformation?

<p>Upper frontal teeth covering lower frontal teeth with varying degrees - from ½ cl.crown to full coverage and contact with palatal gingiva (C)</p> Signup and view all the answers

How is the diagnosis of deep bite made?

<p>Extra- and intraoral examination, biometric examination of occlusion in transverse direction, orthopantomography (A)</p> Signup and view all the answers

What leads to compensatory deep bite in the frontal segment?

<p>Lack of contact between the distal segment (D)</p> Signup and view all the answers

Which factor contributes to a heavy distal bite?

<p>Inclination of upper frontal teeth (C)</p> Signup and view all the answers

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