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The permanent maxillary (upper) canine has the longest and most pointed cusp in the dentition, designed primarily for piercing and tearing; mandibular canines and premolars have shorter, broader cusps adapted more to shearing or grinding functions. Anatomical studies of the “upper canine cusp axis” confirm its steep inclination and pronounced tip, reflecting its sharpness compared with other teeth [Pacifici, 2017, PMID 28280527].