Buccal of the Upper, Lingual of the Lower (cusps); applies to Clyde H. Schuyler’s rules for occlusal adjustment of a normally related dentition in which those cusps contacting in maximum intercuspation (mandibular buccal and maxillary lingual) are favored by adjustment of those cusps that are not in occlusal contact in maximum intercuspation (maxillary buccal and mandibular lingual); also called the Bull rule.