Chin Deformities: Macrogenia, Microgenia, and Their Associations
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Questions and Answers

Mandibular excess is always associated with a Class II molar and canine relationship.

True

Mandibular deficiency is characterized by a retruded chin and an everted lower lip.

True

Mandibular excess and maxillary excess can occur simultaneously, leading to a normal facial profile.

False

Mandibular asymmetry is caused by excessive growth of both condyles.

<p>False</p> Signup and view all the answers

Mandibular asymmetry can occur in individuals without the presence of malocclusion.

<p>True</p> Signup and view all the answers

Mandibular deficiency is associated with an increased overjet in the incisor area.

<p>True</p> Signup and view all the answers

The long face syndrome is characterized by an excessive appearance of the lower third of the face.

<p>True</p> Signup and view all the answers

The short face syndrome is associated with a decreased mandibular occlusal plane angle.

<p>False</p> Signup and view all the answers

Apertognathia, or open bite, is characterized by premature anterior occlusion with the absence of posterior occlusion.

<p>False</p> Signup and view all the answers

The long face syndrome is often accompanied by lower facial asymmetry.

<p>False</p> Signup and view all the answers

The three basic facial types are brachyfacial (short facial type), dolichofacial (long facial type), and mesofacial (ideal facial type).

<p>True</p> Signup and view all the answers

The presurgical treatment phase includes periodontal, restorative, and orthodontic considerations, as well as final treatment planning.

<p>True</p> Signup and view all the answers

Le Fort I osteotomy is used to correct deformities involving both the maxilla and mandible simultaneously.

<p>False</p> Signup and view all the answers

In cases of severe maxillary and mandibular discrepancies, a combination of Le Fort I osteotomy and mandibular surgery may be performed.

<p>True</p> Signup and view all the answers

Le Fort II osteotomy is designed to move the entire face forward, including portions of the eye socket, but does not involve the mandible.

<p>True</p> Signup and view all the answers

In cases of cleft palate, only Le Fort I osteotomy is performed, without any mandibular surgery.

<p>False</p> Signup and view all the answers

Le Fort III osteotomy, also known as craniofacial disjunction, is used to correct deformities involving both the maxilla and mandible simultaneously.

<p>True</p> Signup and view all the answers

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