"right upper (maxillary) quadrant = UR"
"left upper (maxillary) quadrant = UL"
"As in the Palmer notation and FDI World Dental Federation notation systems, individual teeth within each quadrant of the dental arches are then numbered from mesial to distal:"
"Fédération Dentaire Internationale (FDI) notation"
"American Dental Association (ADA) Universal Numbering System"
"Palmer notation"
Expected headings
"Permanent teeth"
"Primary teeth"
"First, the jaws are divided into four quadrants 1-5. Each quadrant is denoted by their English initialism for upper (U) or lower (L) jaw and the patient's right (R) or left (L) side:"