Dr. Khafaji has 31 years experience in dental practice since 1992. He holds PhD & MSc degree in conservative dentistry. Dr. khafaji has been registered as a general dentist from 1992 to 1995 by Iraqi dental association. Then he has been registered as a specialist from 1995 to present time by Iraqi dental association.
Since 1996 he practiced dentistry as a specialist in conservative dentistry in his private clinic in Baghdad. He also taught at various dentistry schools in Iraq and United Arab Emirates while he was practicing dentistry at his private clinic. Furthermore, he has some publications in the dental field.
 1. (A Scanning Electron Microscopic Study to Evaluate The Levage Action  of  Irrigant  Solutions  on The Smear Layer)  an MSc. Thesis, College of Dentistry, Baghdad University.
    2. (Finite  Element  Stress  Analysis  of  Different  Implant  Fixture  Design). A PhD. Thesis, College of Dentistry, Baghdad University.