Malocclusion Classification and Characteristics

The video tutorial discusses occlusion, focusing on both static and dynamic aspects. It explains the six keys of normal occlusion, which include molar relationships and crown angulation. The classification of malocclusion is covered, highlighting intra-arch and inter-arch types, as well as skeletal malocclusions. The tutorial emphasizes the importance of understanding these concepts for orthodontic treatment.

What does the static aspect of occlusion refer to?

• The movement of the jaw

• The alignment and articulation of teeth

• The neuromuscular component of the jaw

• The function of the temporomandibular joint

Which of the following is NOT one of the six keys to normal occlusion?

• Molar inter-arch relationship

• Curve of Spee

• Presence of tooth rotations

• Mesio-distal crown angulation

Why is the classification of malocclusion important?

• To identify the etiology and treatment options

• To determine the color of teeth

• To measure the size of the jaw

• To assess the patient's diet

What is an example of an intra-arch malocclusion?

• Crossbite

• Overjet

• Lingual inclination

• Open bite

What characterizes a pre-normal occlusion in inter-arch malocclusions?

• The upper arch is positioned forward

• The lower arch is positioned forward

• The lower arch is positioned backward

• The upper arch is positioned backward

Which plane is associated with deep bites and open bites?

• Transverse plane

• Horizontal plane

• Vertical plane

• Sagittal plane

What is a skeletal malocclusion?

• A malocclusion due to tooth misalignment

• A malocclusion due to poor oral hygiene

• A malocclusion due to skeletal base abnormalities

• A malocclusion due to gum disease

In skeletal malocclusions, what does maxillary prognathism indicate?

• The mandible is positioned backward

• The maxilla is positioned backward

• The mandible is positioned forward

• The maxilla is positioned forward

What is the opposite of skeletal open bite?

• Skeletal underbite

• Skeletal overjet

• Skeletal crossbite

• Skeletal deep bite

What can cause a transverse skeletal malocclusion?

• Constricted maxillary arch

• Backward positioning of the maxilla

• Excessive vertical growth

• Forward positioning of the mandible