Premolars Connections Puzzle

#4 AND #13

MESIOLINGUAL GROOVE

SHELL-LIKE OCCLUSAL

#21 AND #28

PROMINENT BUCCAL TRIANGULAR RIDGE

TRAPEZOID SHAPED

SQUARE SHAPED

#5 AND #12

1 ROOT

CIRCLE SHAPED

2 ROOTS

ERRUPTION DATE: 11-12 YRS

MESIAL MARGINAL GROOVE

SMALL LINGUAL CUSP

#20 AND #29

3 CUSPS