Understanding Crossbite Characteristics and Causes

The video tutorial discusses crossbite, a dental condition where the bucco-lingual relationship of the upper and lower teeth is misaligned. It explains the normal relationship of teeth and how deviations lead to crossbite. The tutorial covers the British and American classification systems, focusing on buccal and lingual crossbite types. Causes of lingual crossbite, such as early loss of deciduous teeth and crowding, are explored. The concept of displacement and its impact on unilateral crossbite is discussed, along with variations of unilateral crossbite with and without mandible displacement.

What is the normal relationship between upper and lower teeth?

• Upper teeth are lingual to lower teeth

• Upper teeth are mesial to lower teeth

• Upper teeth are distal to lower teeth

• Upper teeth are buccal to lower teeth

In the British system of classification, which arch is used as the reference for crossbite?

• Upper arch

• Lower arch

• Both arches

• Neither arch

What characterizes a buccal crossbite?

• Upper teeth are distal to lower teeth

• Lower teeth are buccal to upper teeth

• Lower teeth are lingual to upper teeth

• Upper teeth are mesial to lower teeth

What is another name for lingual crossbite?

• Scissors bite

• Open bite

• Edge-to-edge bite

• Deep bite

What can cause a lingual crossbite involving one or two teeth?

• Excessive fluoride

• Overuse of pacifiers

• Genetic factors

• Early loss of deciduous teeth

What is displacement in the context of crossbite?

• Movement of the mandible to achieve maximal intercuspation

• Movement of the tongue

• Movement of the maxilla

• Movement of the teeth

What is a characteristic of unilateral crossbite with mandibular deviation?

• The maxilla is symmetrically long

• Both sides of the jaw are affected

• The mandible is symmetrically wide

• Only one side of the jaw is affected

What can cause a unilateral crossbite without mandibular deviation?

• Genetic factors

• Excessive fluoride

• Overuse of pacifiers

• Skeletal asymmetry

What is a potential dental cause for unilateral crossbite?

• Eruption of one or two teeth in an abnormal relationship

• Excessive fluoride

• Overuse of pacifiers

• Genetic factors

What is a potential skeletal cause for unilateral crossbite?

• Overuse of pacifiers

• Genetic factors

• Excessive fluoride

• Asymmetric maxilla