TY  - RPRT
TI  - Removing broken abutment screws from internally threaded implants.
AU  - H Biller
PY  - 1993
DO  - 10.1016/0022-3913(93)90118-8
UR  - https://pubmed.ncbi.nlm.nih.gov/8445570/
ID  - 8445570
ER  -