What adjustment is necessary for optimal visualization of the maxillary sinuses in the Waters method?

In the Waters method, the aim is to obtain a clear radiographic image of the maxillary sinuses by positioning the patient's head correctly. Achieving optimal visualization requires proper extension of the neck so that the OML (Orbitomeatal Line) is perpendicular to the film or imaging receptor. This positioning helps to project the maxillary sinuses above the alveolar processes and minimizes superimposition of the teeth and mandible.

By extending the neck, the orbits and maxillary sinuses are best aligned, facilitating a direct view of these anatomical structures. This adjustment is essential because it allows the radiologist or technician to capture an accurate representation of the sinuses, which is crucial for diagnosing conditions such as sinusitis or other related pathologies.