Final answer:
Option 4. is correct. Elastomeric ties, which are used in orthodontics, are best removed using an orthodontic scaler. This tool is designed to remove the ties effectively without causing discomfort or damage to the braces.
Step-by-step explanation:
Elastomeric ties are small rubber bands or elastic rings used in orthodontics to secure the archwire to the brackets on a patient's teeth. When it comes to removing these ties, the preferred tool is an orthodontic scaler. This instrument is designed specifically for tasks such as this in the orthodontic field because it has a fine tip that can easily slide under the elastomeric tie to lift and remove it from the bracket without causing damage to the patient's braces or discomfort.
Other tools like bird beak pliers, spoon excavators, and hemostats are also used in dental procedures, but they are not typically used for the removal of elastomeric ties. Bird beak pliers are often used to adjust wires, spoon excavators are used to remove decay, and hemostats may be used to grip or hold objects within the oral cavity.