
| 1982-1987 | Study of dentistry. |
| 1989 | Recognition as a specialist dentist for oral surgery |
| 1989-1993 | Postgraduate trainee in orthodontics at the University of Kiel, then in a postgraduate training practice in Nuremberg |
| 1993 | Recognition as a specialist dentist for orthodontics (Munich), establishment of own practice in Erlangen |
| 1997 | Patent granted for "Sabbagh Universal Spring" (US patent 5944518, German patent 19809324) |
| 2002 | Patent granted for "Aqua Splint" (EU/USA) |
| 2005 | Chairman of the Professional Association of German Orthodontists (BDK) in Middle Franconia |
| 2016 | Establishment of the second orthodontic practice in Nuremberg |
| 2017 | Independent court expert Nuremberg/Fürth |
| 2018 | Expert appointed by mutual agreement of the Bavarian Association of Statutory Health Insurance Dentists |
| 2019 | Development of the “SARA” Sabbagh Advanced Repositioning Appliance |
| 2021 | Vice President of the Eurasian Society for Orthodontics / EAO |
| 2023 | Honorary Professorship Award, Bangalore / India |
| 2025 | World Top 100 Doctor Award |
| 1996 | EU/USA patent for the “SUS1 / Sabbagh Universal Spring” SUS1, SUS2 & SUS3 |
| 2002 | EU/USA patent for the “Aqua Splint ® Classic” |
| 2014 | EU/USA patent for the “Aqua Splint ® Mini” |
| 2022 | EU/USA patent for the “SARA® / Sabbagh Advanced Repositioning Appliance” |