Human anatomy, including structure and development and practical considerations . The grinding surfaces are f(jur-sided ; those of the upper are somewhat dia-mond-shaped, the buccal anterior angle being rather in front ; those of the lower arenearly parallelograms, the long diameter being antero-posterior. Tyj)ical uppermolars have four cusps at the angles ; typical lower ones have an additional cusp atthe posterior border ; but in the upper jaw the first is the only one that can be calledtypical. In the upper molars the largest cusp is the anterior lingual, which is connectedby a ridge (the c
Human anatomy, including structure and development and practical considerations . The grinding surfaces are f(jur-sided ; those of the upper are somewhat dia-mond-shaped, the buccal anterior angle being rather in front ; those of the lower arenearly parallelograms, the long diameter being antero-posterior. Tyj)ical uppermolars have four cusps at the angles ; typical lower ones have an additional cusp atthe posterior border ; but in the upper jaw the first is the only one that can be calledtypical. In the upper molars the largest cusp is the anterior lingual, which is connectedby a ridge (the cingulum ) to the posterior buccal. The jjijsterior lingual cusp is thesmallest. A minute rudimentary cus|) is found on the lingual surface of the anteriorlingual cusp, usually too small to reach the grinding surface, and often hard to recog-nize. Not counting this, the first upper molar has four cusps in more than 90per cent. Owing to the cingulum, the grooves on the grinding surface are bestdescribed as two oblique ones, the first from the anterior border to the middle of the. Second molar teeth of leftside, labial {A\ and lateral(^) aspects. (Leidy.)
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
