Dental Braces Orthodontic Appliances and Accessories 1 — Questions and Answers
Question 1: What is the primary purpose of orthodontic spacers (separators)?
- To whiten teeth before brace placement
- To create space between teeth for molar bands (Correct answer)
- To hold the archwire in place
- To correct jaw misalignment
Correct answer: To create space between teeth for molar bands
Orthodontic spacers are placed between back teeth to push them apart enough to fit the metal molar bands that anchor the braces.
Question 2: What does a palatal expander do?
- It straightens crooked front teeth directly
- It whitens teeth during orthodontic treatment
- It widens the upper jaw to create more space for teeth (Correct answer)
- It holds the lower jaw in a forward position
Correct answer: It widens the upper jaw to create more space for teeth
A palatal expander gradually widens the upper jaw by applying outward pressure to both halves of the palate, creating more room for properly aligned teeth.
Question 3: What is the primary function of orthodontic elastics (rubber bands) during treatment?
- To hold the archwire into the brackets
- To prevent food from getting stuck in braces
- To apply additional force to correct bite issues between upper and lower jaws (Correct answer)
- To reduce pain during orthodontic treatment
Correct answer: To apply additional force to correct bite issues between upper and lower jaws
Orthodontic elastics connect upper and lower brackets to apply forces that correct bite problems such as overbites, underbites, and crossbites.
Question 4: What is the main purpose of orthodontic headgear?
- To protect teeth during sports activities
- To keep the mouth open during dental procedures
- To control jaw growth and move back teeth into proper position (Correct answer)
- To hold a palatal expander in place
Correct answer: To control jaw growth and move back teeth into proper position
Orthodontic headgear applies external force to slow or redirect jaw growth and move molars backward, helping to correct severe bite problems.
Question 5: What type of bite problem is a Herbst appliance most commonly used to treat?
- Overbites caused by a lower jaw positioned too far back (Correct answer)
- Crossbites in the back teeth
- Overcrowding in the front teeth
- Gaps between upper front teeth
Correct answer: Overbites caused by a lower jaw positioned too far back
The Herbst appliance holds the lower jaw in a forward position to stimulate growth and correct overbites caused by an underdeveloped or recessed lower jaw.
Question 6: What is the main function of a lip bumper in orthodontic treatment?
- To prevent thumb-sucking habits
- To correct an underbite by pushing the lower jaw forward
- To protect the lips from bracket irritation
- To relieve lip and cheek pressure from front teeth and push molars backward (Correct answer)
Correct answer: To relieve lip and cheek pressure from front teeth and push molars backward
A lip bumper uses the natural pressure of the lips and cheeks against a bumper bar to push molars backward, creating space in a crowded dental arch.
Question 7: What are orthodontic power chains primarily used for?
- To close spaces between teeth during treatment (Correct answer)
- To strengthen the connection between brackets and the archwire
- To hold spacers in place between molars
- To connect headgear to back molars
Correct answer: To close spaces between teeth during treatment
Power chains are continuous linked elastic rings placed along the archwire that apply steady pressure to close gaps between teeth.
Dental Braces Orthodontic Appliances and Accessories 1
What is the primary purpose of orthodontic spacers (separators)?