Fig. 3

A Photograph showing the arrangement pattern of cheek teeth of upper and lower dental arches. (Lateral view). 1- 2^nd upper premolar; 2- 3^rd upper premolar; 3- 1^st upper molar; 4- 2^nd upper molar; 5- 3^rd upper molar; 6- 3^rd lower molar; 7- 2^nd lower molar; 8- 1^st lower molar; 9- 2^nd lower premolar; p- Pentaconid cusp. B Photograph showing the masticatory view of the mandible with an imaginary design for cusps arrangement and alignment with the maxillary ones. The blue curves indicate the outline of the upper buccal cusps border. The red curves for the lingual ones. The horizontal and vertical alignment of the dental cusps of both dental arches, fill the teeth gaps by contrary situated semicircular cutting edges. Accordingly, the cusps of cheek teeth, cover the area of mastication for massive crushing the food