ADEX Dental Hygiene Licensing Exam 2025 – Complete All-In-One Guide to Succeed

The inferior surface of the maxillary occlusal rim should be parallel to Camper's Line, also known as the Ala-tragus Line. This line is an important anatomical reference that helps establish the proper orientation of dental structures in relation to the facial features of a patient. Specifically, Camper's Line extends from the lowest point of the ala of the nose to the tip of the tragus of the ear. Aligning the occlusal rim to this line ensures that the maxillary denture or prosthesis is positioned correctly in relation to the patient's facial aesthetics and functional occlusion.

Using Camper's Line as a reference is essential during the fitting of dentures, as it helps achieve a harmonious appearance and aids in proper phonetics and mastication. Ensuring that the occlusal plane is parallel to this line contributes to achieving a natural appearance in the dental restoration, enhancing both function and aesthetics.

In contrast, while the other planes mentioned, like the Frankfort Horizontal Plane, Inter-occlusal Plane, and Mandibular Plane, have their specific applications in different contexts, they are not the primary reference for determining the orientation of the maxillary occlusal rim. Therefore, setting the inferior surface parallel to Camper's Line is crucial for effective