Labels:black | darkness OCR: Primary teeth. (a) The primary arch; key identifies teeth with corresponding alphabet letters, followed by approximate eruption date. [b| Primery teeth in occlusion. A-UR second molar, 24 to 26 months K-LL second molar, 20 to 22 month B-UR first molar, 14 to 16 months L-LL Arst molar, 12 to 14 months C-UR cuspid. 18 to 20 months M-LL cuspid, 16 to 18 months D-UR lateral incient, 9 to 11 months N-LL lateral incisor, 7 to 9 months E-UR contral incisor, 7 to 9 months O-LL central incisor, 6 to 8 months F-UL central incisor, 7 to 9 months P-LR central incisor. 6 to 8 months G-UL lateral incisor, 9 to 11 months Q-LR lateral Incisor, 7 to 9 months H-UL cuspid. 18 to 20 months R-LR cuspid, 15 to 18 months I-UL first molar, 14 to 16 months S-LR Erst molar. 12 to 14 months I-UL second molar, 24 to 26 months T-LR second molar, 20 to 22 month