1. The permanent maxillary second and third molars have some key differences in their anatomy. The second molar typically has a rhomboid shape with well-developed buccal and lingual cusps, while the third molar has a triangular shape with a single large lingual cusp and shorter, fused roots. 2. The root anatomy also differs between the molars. The second molar generally has three separate and parallel roots, while the third molar often has short, underdeveloped roots that are fused together and curved distally. 3. There is more anatomical variation in the third molar compared to other teeth. Its crown and roots are frequently malformed or absent altogether. In