Which instrument is commonly used to facilitate closure of the mouth by inserting materials into the tissues?

• A. Mouth former
• B. Needle injector
• C. Scissors
• D. Forceps

Answer: (B)

Closing the mouth by inserting material into the tissues relies on an instrument specifically designed to deliver wax or sealing material into the oral tissues to hold the lips in place. The needle injector fits this role because it can pass through the lips or surrounding tissues and inject the closure material where needed, creating a secure and natural-looking closure.

The mouth former, by contrast, is used to shape and support the lips for a natural appearance rather than to inject materials into tissues. Scissors and forceps are general cutting and grasping tools and aren’t used to place closure material inside tissues.