This case was referred as the dentist could only find two canals. The upper second molar will sometimes have the mesiobuccal and distobuccal canals very close, and sometimes the split will occur well below a a single, larger orifice.

Pre-operative Radiograph

The buccal canals split about 3mm below the orifice.

Palatal Canal

Amalgam Restoration

Post-Operative Radiograph

Pat Caldwell