Open bite

Open bite is a malocclusion occurring in

• the presence of vertical overlap between the front teeth
• the alignment of the back teeth
• the symmetry of the jaw
• the absence of vertical overlap between the front teeth

Surgical method of correction of surgical open bite

• LeFort I osteotomy

• LeFort II osteotomy

• LeFort III osteotomy

• All of the above

Posterior open bite occurs due to

• Supraeruption of posteriors

• Infraocclusion of posteriors

• Supraeruption of anterios

• Infraocclusion of anteriors

Preferred choice of extraction in open bite case

• Most posterior teeth

• Most anterior teeth

• Impacted teeth

• All of the abve

What is the role of tongue thrust in the development of open bite?

• It helps in closing the bite

• It pushes the teeth forward

• It has no impact on open bite

• It causes the teeth to separate

Overbite in AOB is expressed in terms of

• Positive

• Negative

• No changes in overbite

• No of the above

Growth pattern in Open bite cases

• Horizontal

• Average

• Vertical

• None of the above

Choice of Orthopedic appliance in Open bite

• Headgear

• Facemask

• FR-IV

• Twin block

Apertognathia is referred as

• Skeletal anterior open bite

• Skeletal posterior open bite

• Dental anterior open bite

• Dental posterior open bite

Mandibular plane in open bite cases will be

• Flat

• Normal

• Steep

• Low