Orthodontics: Dentoalveolar Crossbites Quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the most frequent cause of dentoalveolar crossbites?

Mandibular origin

Maxillary origin (correct)

Habitual origin

Dental malposition origin

What is the primary treatment for dentoalveolar crossbites?

Prosthetics

Surgical intervention

Habit modification

Orthodontic treatment (correct)

What is a characteristic feature of dentoalveolar crossbites with a symmetric maxilla?

Unilateral compensation

Bilateral compensation (correct)

Presence of mandibular deviation

Absence of mandibular deviation

What is the primary goal of treatment for true asymmetries in the deciduous or mixed dentition?

To correct the asymmetric growth pattern through various methods, including Activators, Bone distraction, and surgery. (C) Signup and view all the answers

What is the objective of dentoalveolar expansion as a treatment for crossbites?

To increase arch length (B) Signup and view all the answers

Which type of asymmetry is characterized by unilateral hypogrowth?

Secondary skeletal adaptation to a mandibular functional deviation. (D) Signup and view all the answers

What is the primary concern regarding functional deviations of the mandible over time?

Development of skeletal asymmetries (B) Signup and view all the answers

According to the content, what is the recommended retention period for removable retainers in adults after SARPE (Surgically Assisted Rapid Palatal Expansion)?

24-48 months. (C) Signup and view all the answers

What is the recommended approach to address oral breathing in the context of crossbite treatment?

Cooperation with specialists like allergists and ENT doctors (B) Signup and view all the answers

What is the main advantage of early treatment for dentoalveolar crossbites?

Reduced risk of relapse and skeletal asymmetries (B) Signup and view all the answers

A patient presents with a right crossbite that has developed significantly within a year. This situation is most likely an example of:

Incomplete and unorganized crossbite. (C) Signup and view all the answers

What is NOT a therapeutic objective in the treatment of dentoalveolar crossbites?

Surgical intervention of the mandible (D) Signup and view all the answers

What specific treatment was utilized to correct the crossbite and center the mandibular midline in the 6-year-old patient mentioned in the content?

Adenoidectomy and tonsillectomy, rapid maxillary disjunction. (D) Signup and view all the answers

Which of the following options are used to correct a thumb sucking habit in children older than 4-5 years?

Tongue crib (B) Signup and view all the answers

What type of malocclusion is addressed by the use of removable appliances?

Dentoalveolar malocclusion (C) Signup and view all the answers

What is the primary purpose of the expansion screw in removable appliances?

To expand the palate (B) Signup and view all the answers

In the context of dental treatment, what is the significance of the functional masticatory angle of planes (AFMP)?

It assesses the patient's ability to chew comfortably and efficiently (D) Signup and view all the answers

Which of the following is a characteristic of a unilateral posterior crossbite?

Preference for chewing on the side of the crossbite (D) Signup and view all the answers

What is the primary goal of early treatment with dentoalveolar expansion and selective carvings in a unilateral posterior crossbite?

To correct the vertical angle of the lateralities (A) Signup and view all the answers

Which of the following is NOT a common step in treating a thumb-sucking habit in children older than 4-5 years?

Encouraging the child to use a pacifier instead (D) Signup and view all the answers

What is the primary rationale behind using fixed appliances like palatal arches or quad-helixes in dental treatment?

To expand the palate (A) Signup and view all the answers

Study Notes

Treatment of Transverse Malocclusions

Transverse malocclusions affect the side-to-side relationship of the upper and lower jaws.
Diagnosis involves identifying the underlying cause (maxillary deficiency, mandibular excess, or a combination).
Classification includes posterior crossbite (bilateral, unilateral, monodental), scissor bite (bilateral, unilateral, monodental), and other types of transversal anomalies.
Epidemiological data shows a prevalence of 1-2.3% in the general population and 48% in orthodontic patients for posterior crossbite.

Index

The index includes topics like concept and classification, epidemiology, etiopathology (genetic factors, habits), diagnosis, treatment, and frontal radiographs.

Concept & Classification

Maxillary deficiency is determined by alterations in the transverse plane of occlusion, independent of the sagittal and vertical relationships.
Types of transversal anomalies are: posterior crossbite (unilateral, bilateral, monodental), scissor bite (unilateral, bilateral, monodental), and cuspid to cuspid.

Etiology: Genetic Factors

Genetic factors can cause maxillary hypoplasia, mandibular hyperplasia, combinations of both, or syndromes.

Etiology: Habits

Oral breathing: Caused by nasal obstruction, often persists after the obstruction has been resolved. Causes include allergic rhinitis and adenoid hypertrophy. Consequences include reduced maxillary development, and predominance of lip over paranasal muscles, leading to reduced nasal spine and incisor protrusion.
Infantile swallowing: Characterized by the tongue's position behind the incisors, and contact with the palate; teeth in contact/close, and a retrusive mandible. Etiologic factors include enlargement of tonsils and oral breathing; characteristics include tongue interposition (between teeth for mandibular stability), and lack of tongue pressure / pressure of buccinator muscles. Consequences include maxillary compression and open bite tendencies.
Thumb sucking: Effects depend on the position, time, and morphogenetic pattern of thumb sucking. Causes include pressure of the tongue and buccinator muscles, and reduced intraoral air pressure during suction. Consequences include dentoalveolar compression.

Diagnosis

Diagnosis includes patient history and examination, extraoral and intraoral photos, study models, panoramic radiographs, lateral cephalometric radiographs, frontal cephalometric radiographs, and complementary explorations (basecranial radiography, 99Tc scintigraphy, SPECT, and computed axial tomography).

Treatment

Early treatment is essential to prevent further dentoalveolar and/or skeletal compensations. This reduces the risk of relapse, increases arch lengths and reduces eruption and tooth retention.
Therapeutic objectives include controlling habits (oral breathing, thumb sucking, infantile swallowing), maxillary expansion, and the elimination of prematurities.
Treatment methods depend on the severity of the problem, the age of the patient (deciduous dentition, mixed dentition, or permanent dentition), and the specific type of malocclusion (dentoalveolar, skeletal, true asymmetries).
Treatment options include removable appliances (acrylic base, Adam clasps, vestibular arch, bite plane, expansion screw) and fixed appliances (palatal arch, quad helix).
Retention periods after treatment vary depending on patient age and the nature of the correction.

Frontal XR

Frontal radiographs are important for diagnosing the origin of the anomaly (maxilla, mandible, or a combination) and identifying skeletal or dentoalveolar malocclusions.

Types of Transverse Malocclusions - Clinical Presentation

Different types of transverse malocclusions, categorized by whether or not they involve mandibular deviation, and the type of skeletal/dentoalveolar involvement will determine the treatment approaches.

Treatment: Skeletal Malocclusions

Treatment may involve orthopedic approaches (surgery), or orthodontic treatment that is limited in nature, given that the mandibular symphysis typically closes during the first year of life.

Treatment: Dentoalveolar Malocclusions

Treatment methods often rely on tooth movement utilizing appropriate orthodontic appliances.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge on dentoalveolar crossbites, their causes, treatments, and associated features. This quiz covers important aspects of orthodontic practices, including the objectives of various treatments and retention strategies. Perfect for students and practitioners looking to enhance their understanding of this critical topic.