What is the primary function of a long needle in dental procedures?

The primary function of a long needle in dental procedures is to administer block injections. In dentistry, block injections are techniques used to numb a larger area of the mouth by targeting specific nerves, which is often necessary for procedures that involve multiple teeth or extensive regions of the oral cavity. The long needle allows clinicians to reach deeper areas, such as the inferior alveolar nerve, which provides sensation to the lower jaw. This is particularly important when treating patients in areas where thicker tissue or bone is present, making a short needle insufficient for effective anesthesia.

Using a long needle ensures the anesthetic solution can be deposited at the appropriate anatomical site to achieve optimal numbing, enabling the practitioner to perform necessary dental work without causing pain or discomfort to the patient. This technique is critical for facilitating a range of dental treatments and helps ensure patient comfort during procedures.