What is the primary difference between a block injection and an infiltration?

The primary difference between a block injection and an infiltration lies in the area of numbness and the technique used to administer the anesthetic. A block injection targets a specific nerve or group of nerves, typically allowing for the numbness of multiple teeth and surrounding structures within a particular region, such as the quadrant of the mouth. This method is particularly effective for procedures that involve deeper structures or multiple teeth, as it can provide comprehensive pain control over an extended area.

In contrast, an infiltration injection involves the direct application of the anesthetic solution into the alveolar bone or soft tissue near the tooth or teeth being treated. Infiltration is generally used for numbing one or just a few adjacent teeth, especially in localized areas such as the maxillary arch, where bone density allows for effective diffusion of the anesthetic.

This distinction is crucial for dental professionals when determining the best anesthetic approach for different dental procedures. Understanding the difference between the two types of injections ensures optimal pain management and treatment efficacy for the patient.