Interceptive Orthodontics

A 10 year old boy was given the above appliance to correct his anterior crossbite. This appliance requires activation in order to achieve correction of the anterior crossbite. What is the method of activation required?

• Gradual increment of the height of the posterior bite block to open bite

• Turning expansion screw clockwise to separate the base plate anterior posteriorly

• Activation of the spring by stretching the activation coil up to incisal edge

• Gradual reduction of the posterior bite block to allow tongue force correction

This is an OPG of an 8 year old girl in early mixed dentition. She is fit and well. After viewing her OPG, the dentist was concerned with her dentition and had a discussion with the patient's mother. What do you think the concerns are?

• Delayed eruption of the maxillary lateral incisors

• Possible future crowding in permanent dentition

• Absence of both the maxillary 3rd molars when compared to the mandibular 3rd molars

• Eruption progress of the maxillary incisors are slower compared to maxillary lateral incisors

The following statements are TRUE for ectopic maxillary canienes:

• More common in females than in males

• More commonly in buccal compared to palatal

• Primary treatment requires orthodontic traction

• Sometimes associated with peg shaped maxillary lateral incisor

What is the most likely diagnosis for this patient?

• Dilaceration

• Trauma/avulsion

• Congenitally missing

• Presence of supernumerary

Anterior crossbite in mixed dentition usually would require interceptive orthodontic treatment. Which statement below is NOT the indication of the use of upper removable appliance in crossbite management?

• Adequate overbite

• Adequate space for alignment

• Opposing tooth is mobile

• Well aligned arch