What is the primary purpose of a retention appliance in orthodontics?

• A. To move teeth into new positions
• B. To stabilize results after treatment
• C. To prevent caries
• D. To shorten treatment time

Answer: (B)

After active correction, teeth and supporting tissues need time to settle into the new positions. A retention appliance holds the teeth in their finished alignment during this stabilization period, preventing relapse as the periodontal ligaments, bone, and soft tissues remodel around the corrected bite. This is why its main purpose is to stabilize the results after treatment. It doesn’t actively move teeth, doesn’t directly prevent caries, and doesn’t shorten treatment time, though good retention helps maintain long-term health and aesthetics.