TY  - RPRT
TI  - Scanning electron microscope study comparing four root canal preparation techniques in small curved canals.
AU  - F Heard
AU  - R E Walton
PY  - 1997
DO  - 10.1046/j.1365-2591.1997.00090.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9477822/
ID  - 9477822
ER  -