Periodontics
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 meisal surfaces of sector 1.
Mandibular: buccal and distal surfaces of sector 4, pivots at 43, then lingual and mesial surfaces of sector 3.