What does a needle injector primarily assist with in funeral practice?

The primary function of a needle injector in funeral practice is to assist with securing the jaw after embalming. This tool is specifically designed to create a mechanical connection that holds the lower jaw in place, ensuring that it remains closed during the viewing and other funeral services. The use of a needle injector allows for a secure, yet minimally invasive method to achieve this, which is crucial for the overall presentation of the deceased.

In contrast, while facial features and aesthetics can be addressed through other techniques, the needle injector does not create those features directly. Similarly, it is not designed for injecting disinfectants or fixing bones, as these tasks are typically managed by other methods or instruments in the embalming process and anatomy management. Thus, the needle injector's primary role is specifically related to jaw closure post-embalming, making it an essential tool in preserving the appearance of the deceased for services.