Crossbites and Openbites

Podcast

Play an AI-generated podcast conversation about this lesson

Download our mobile app to listen on the go

Get App

Questions and Answers

What is a primary aim of the lecture regarding crossbites and openbites?

To discuss the ethical considerations in orthodontic referrals.
To detail the etiology and management strategies. (correct)
To analyze the economic impact of orthodontic treatments.
To explore historical treatments of malocclusion.

Anterior open bite is characterized by which of the following conditions?

Excessive overlapping of the incisors.
Misalignment of the molars.
Increased overjet.
Lack of vertical overlap between the upper and lower incisors. (correct)

Upward rotation of the maxilla contributes to an open bite by primarily affecting which dimension?

The anteroposterior position of the mandible.
The inclination of the molars.
The transverse width of the palate.
The vertical relationship of the anterior teeth. (correct)

How does tongue thrust swallowing contribute to the development of an anterior open bite?

By exerting anterior force against the incisors during swallowing. (C) Signup and view all the answers

What dental factor is associated with the development of an anterior open bite?

Under-eruption of anterior teeth. (D) Signup and view all the answers

Management of open bite related to habits involves?

Using a habit breaking appliance. (D) Signup and view all the answers

What is the primary purpose of using high-pull headgear in the context of skeletal open bite management?

To change the inclination of the maxillary plane. (C) Signup and view all the answers

In cases of skeletal Class II malocclusion with an open bite, how do thick posterior bite blocks within a twin block appliance aid in correction?

By intruding the molars. (D) Signup and view all the answers

Posterior crossbite is characterized by which of the following?

A discrepancy in the buccolingual relationship of upper and lower posterior teeth. (B) Signup and view all the answers

How does a constricted V-shaped maxilla contribute to the development of crossbite?

By creating insufficient space for the eruption of permanent teeth. (B) Signup and view all the answers

What dental factor contributes to posterior crossbite?

Improper inclination of posterior teeth. (D) Signup and view all the answers

What is the primary aim of managing skeletal posterior crossbites in growing individuals?

To allow transverse expansion of the mid-palatal suture. (C) Signup and view all the answers

When using a rapid palatal expander (RPE) for correcting posterior crossbites, what is the typical activation protocol?

Turned two times per day to achieve overcorrection. (C) Signup and view all the answers

Which appliance is utilized in slow palatal expansion?

Quadhelix appliance. (B) Signup and view all the answers

What is the primary mechanism by which cross elastics with fixed appliances correct a posterior crossbite?

Dental tipping. (D) Signup and view all the answers

What is a key difference between managing severe skeletal crossbites in adults versus in children?

Adults often require surgically assisted rapid palatal expansion. (B) Signup and view all the answers

Anterior open bite is characterized by:

A lack of vertical overlap between the upper and lower incisors. (A) Signup and view all the answers

What is the effect of downward rotation of the mandible on the anterior teeth?

It contributes to an anterior open bite. (A) Signup and view all the answers

What is the dental factor that often contributes to anterior open bite?

Under-eruption of anterior teeth. (D) Signup and view all the answers

Which appliance is related to the management of habits?

Habit breaking appliance. (B) Signup and view all the answers

What is the goal of high-pull headgear regarding open bite management?

Changing the inclination of the maxillary plane. (B) Signup and view all the answers

Thick posterior bite blocks, used within a twin block appliance, correct what?

Intruding the molars. (D) Signup and view all the answers

Which characteristic defines posterior crossbite?

The buccolingual relationship of the upper and lower posterior teeth is a problem. (D) Signup and view all the answers

How does V-shaped maxilla cause crossbite to form?

Making the permanent teeth lack space. (A) Signup and view all the answers

Which of the dental issues is related to the formation of posterior crossbite?

The inclination of posterior teeth is incorrect. (B) Signup and view all the answers

What is the main purpose behind managing a skeletal posterior crossbite during a patient's growth?

Transversely widening, and expanding, the mid-palatal suture. (D) Signup and view all the answers

How should a palatal expander be used with a patient?

Turning it twice a day to overcorrect. (C) Signup and view all the answers

What device would you recommend is used to slow palatal expansion?

Quadhelix. (B) Signup and view all the answers

By what process do cross elastics correct a posterior crossbite?

Dental tipping. (C) Signup and view all the answers

In terms of severe skeletal crossbites, what's a key difference between treating adults vs. children?

Adults often require surgically assisted rapid palatal expansion. (C) Signup and view all the answers

What is the primary characteristic of an anterior open bite?

A lack of vertical overlap between the upper and lower incisors. (A) Signup and view all the answers

How does downward rotation of the lower jaw typically affect the position of the front teeth?

It contributes to an anterior open bite. (C) Signup and view all the answers

Which dental condition is associated with the development of an anterior open bite?

Under-eruption of the anterior teeth. (C) Signup and view all the answers

In a patient with an anterior open bite, excessive tongue thrusting during swallowing primarily affects:

The position and alignment of the incisors. (B) Signup and view all the answers

A patient presents with a posterior crossbite affecting the molars on both sides of the mouth. What is the most likely skeletal characteristic contributing to this condition?

Narrowness of the maxillary arch relative to the mandibular arch. (C) Signup and view all the answers

If a child has a posterior crossbite attributed to a thumb-sucking habit, what change in the maxillary arch form is most likely?

A constricted and V-shaped arch. (B) Signup and view all the answers

An adult patient has a severe skeletal open bite. What treatment approach is most likely required?

Orthognathic surgery. (C) Signup and view all the answers

A 7-year-old child presents with an anterior open bite and a history of prolonged thumb-sucking. Which of the following interceptive orthodontic appliances is most appropriate?

A habit-breaking appliance. (C) Signup and view all the answers

Which of the following statements best describes the relationship between open-mouth posture and the development of anterior open bite?

Open-mouth posture can result in over-eruption of posterior teeth and increased incidence of anterior open bite. (B) Signup and view all the answers

Flashcards

Anterior Open Bite

A malocclusion where there is a lack of vertical overlap between the upper and lower incisors.

Skeletal Etiology of Open Bite

Upward rotation of the maxilla or downward rotation of the mandible.