mohamad aboualnaser-awatef shaar-oussama sandid- orthodontist-orthodontist paris france-Seminars in Orthodontics-Orthodontic & Dental Continuing Education, Seminars & Courses-orthodontist Kingdom of Saudi Arabia ksa-orthodontist qatar-orthodontist koweit-orthodontist emirats- lebanon beirut, dentist beirut lebanon-pediatric dentsitry beirut lebanon-dentiste orthodontiste beyrouth lebanon-pediatrique dentistrie beyrouth liban- periodontics lebanon-orthodontic lebanon-lebanese university dentistry-american university of beirut dentistry orthodontics-beirut arab university dentistry- universite saint joseph beirut dentistry-pediatre beyrouth liban-pediatrics beirut lebanon