How should the syringe be held for a palatal local infiltration?

• A. Parallel to the long axis of the tooth; at height of the mucobuccal fold over the tooth
• B. Perpendicular to the tooth surface at the apex
• C. Parallel to the palatal surface at the midline
• D. Perpendicular to the occlusal plane

Answer: (A)

For palatal local infiltration, the syringe should be held parallel to the long axis of the tooth and at the height of the mucobuccal fold over the tooth. This orientation gives you a stable, controlled path that follows the tooth’s orientation and places the needle in the correct tissue plane to deposit anesthetic just beneath the palatal mucosa near the tooth. Keeping the bevel toward bone helps minimize tissue trauma and improves control as you advance the needle and deliver the anesthetic into the dense palatal connective tissue. Approaches that angle the needle perpendicular to the tooth surface at the apex, or that run parallel to the palatal surface at the midline or perpendicular to the occlusal plane, would misalign with the anatomy, making the injection harder to control and less effective.