Upper first premolar with MO cavity; what is important about the application of the matrix band (the question has also shown too as ….What is complicated by):
A. The mesial concavity of the root surface
B. Small lingual pulp
C. High buccal pulp horn
D. High lingual pulp horn
E. Concavity of distal root surface
A. The mesial concavity of the root surface
B. Small lingual pulp
C. High buccal pulp horn
D. High lingual pulp horn
E. Concavity of distal root surface