| | | 9th Makkah International Dental Conference | Saudi Arabia | 29-5-2011 to 1-6-2011 | Participant | |
| | Abu-Hammad O. A., Harrison A. | The Second International Symposium on Computer Methods in Biomechanics and Biomedical Engineering. | Swansea, Wales, U.K | 21st and 24th September 1994 | Lecturer | |
| | | The Thirty Fifth Conference of the Arab Dental Federation | Sudan | 2005 | Participant | |
| | | The 5th International Implantology Congress | Egypt | 2005 | Participant | |
| | | The Dental Implantation Courses held by the Jordanian Group for Oral Implantology | Jordan | 2004 | Lecturer | |
| | | Attended the EAO conference by the European academy of Osseointegration held | Paris | 2004 | Participant | |
| | | Syrian Dental Association Conference | Syria | 2004 | Participant | |
| | | The Eleventh International Dental Congress | | 2003 | Participant | |
| | Abu-Hammad O. A., Harrison A | The Forty-Forth Annual General Meeting of the British Society for Dental Research. | Bristol, U.K. | 1st –4th April 1996 | Lecturer | |
| | Abu-Hammad O. A., Harrison A. | The Forty-Forth Annual General Meeting of the British Society for Dental Research. | Bristol, U.K. | 1st –4th April 1996 | Lecturer | |
| | Abu-Hammad O. A., Harrison A. | The Forty-Forth Annual General Meeting of the British Society for Dental Research. | Bristol, U.K. | 1st –4th April 1996 | Lecturer | |
| | Abu-Hammad O. A., Harrison A., Watkinson A. C.
| The scientific day of the Dept. of Oral and Dental Science | Bristol, U.K. | 1995 | Lecturer | |
| | Abu-Hammad O. A., Harrison A. | The First European Conference of Nisa Users. | Manchester, U.K. | 14th -15th May 1996 | Lecturer | |
| | Abu-Hammad, Harrison A., Williams D. | The 15th Jordanian and the 20th Arab Dental Union Congress | Amman, Jordan | 1-4/4/1997 | Lecturer | |
| | | The 5th Sudanese Dental Union Congress
| Khartoum, Sudan. | 13-16/1/2003 | Participant | Also lecturer and administrator at the Dental Implantation Course Held at the University of Khartoum |
| | Abu-Hammad O. A., Harrison A., Watkinson A. C. | The Forty-Third Annual General Meeting of the British Society for Dental Research. | Manchester, U.K. | 11 April 1995 | Lecturer | |
