All of the following are true regarding anatomy and occlusion of a class IV composite restoration on tooth 25 except:

In a Class IV composite restoration on tooth 25, which typically refers to a maxillary first premolar, the anatomy and occlusion must be carefully considered. The correct answer highlights the false statement regarding the anatomical features of this tooth.

The facial surface of a maxillary first premolar does not typically have two shallow fossa between three lobes. This tooth usually has a more distinct anatomy characterized by one prominent buccal lobe and a separation between the two lingual lobes, which contribute to its overall contour rather than two fossa. Understanding the correct anatomical structures is crucial for placing restorations that blend well with natural contours and for achieving proper occlusion.

The other options correctly describe features of the tooth. The lingual surface typically does include two marginal ridges—one mesial and one distal—forming the boundaries of the occlusal surface and helping define the anatomy of the tooth. Additionally, the lingual surface of tooth 25 does include a cingulum, an important anatomical feature that affects the tooth’s function and esthetics. Finally, the absence of articulating paper marks on the restoration indicates that the occlusion is appropriately adjusted post-restoration, ensuring that the restoration does not interfere with the patient's bite when they oc