Xpedent

Premolar and molar. left-curve. First instrument for treating all the surfaces and the furcations.
Maxillary: buccal and distal surfaces of sector 2,pivots at 13, then the buccal and mesial surfaces of sector 1.
Mandibular: buccal and distal surfaces of sector 4, pivots at 43, then lingual and mesial surfaces of sector 3.