• 1994-1999 Istanbul Hand Surgery and Microsurgery Center, Aksaray Vatan Hospital
• 1999 – 2000 Kleinert Kutz and Associates Hand Care Center (Research Fellow) Louisville, Kentucky- ABD
• 2000 – 2017 Istanbul Hospital Hand Surgery and Microsurgery Center, Istanbul
• Dr. Emre Orhun, 1998 Vancouver / Kanada,
• 2001 İstanbul / Türkiye,
• He took place as a speaker at the World Hand Surgery Congress held in Sydney / Australia in 2007.
• Dr. Emre Orhun is one of 16 Orthopedic specialists who was awarded the Hand Surgery Minor Diploma given by the Ministry of Health in 2012 due to his experience in Hand Surgery and Microsurgery.

• • Tissue injuries due to upper extremity glass cuts. A. Sevencan, E. Nuzumlalı, C. Gürbüz, Ü. Kantarcı, S. Çepel, E. Orhun, O Polatkan, O. Bayrı Acta Orthop. Traumatol Turc. 1997; 31: 31-33.​

• • Evaluation of the improvement of sensibility after primary median nerve repair at the wrist. S. Polatkan, E. Orhun, O. Polatkan, E. Nuzumlalı, O. Bayrı Microsurgery, 1998;18:192-196.

• • Repair of zone 2 flexor pollicis longus lacerations in children. E. Orhun, S. Polatkan, O. Polatkan, E. Nuzumlalı, Ü. Kantarcı Journal Hand Surgery (Br), 1999; 24B:1:54-55.

• • Indications and evaluation methods in major extremity replantations. E. Orhun, E. Nuzumlalı, O. Polatkan Acta Orthop. Traumatol Turc. 1999; 33 (2): 158-161.

• • Bilateral primary repair of the flexor pollicis longus – case report. E. Orhun, O. Polatkan, S. Cepel, E. Nuzumlalı Acta Orthop. Traumatol Turc. 1999; 33 (4): 343-345.

• • Long-term results of vascular and nervous island flaps used in thumb injuries. E. Orhun, K. Öztürk, S. Polatkan, E. Nuzumlalı, S. Cepel, O. Polatkan Acta Orthop. Traumatol Turc. 2000, 34 (1): 54-58.

• • Evaluation of sensory recovery in cross finger flaps and palm flaps used in fingertip injuries. E. Orhun, S. Polatkan, E. Nuzumlali, Ü. Kantarcı, O. Polatkan Acta Orthop. Traumatol Turc. 2000, 34 (1): 59-63.​ ​

• • Factors affecting outcome in trapezio-metacarpal joint dislocations accompanying combined injuries. E. Orhun, O. Polatkan, Ü. Kantarcı, E. Nuzumlalı, S. Polatkan Turkısh J. Arthroplasty Arthroscopıc Surgery 2000; 11(1): 42-44.

• • Our results of reverse flow digital artery island flap used in fingertip injuries E. Orhun, K. Öztürk, E. Nuzumlalı, S. Polatkan, O Polatkan Acta Orthop. Traumatol Turc. 2000; 34(2): 147-151.

• • Surgical treatment principles that we apply in complicated syndactyly cases. E. Orhun, E. Nuzumlalı, C. Gurbuz, Ü. Kantarcı Acta Orthop. Traumatol Turc. 2000; 34(2): 152-156.

• • Carpometacarpal dislocation of the thumb associated with proximal intermetacarpal ligament rupture E. Orhun, S. Çepel, Ü. Kantarcı, E. Nuzumlalı, O. Polatkan Hacettepe Ortopedi Dergisi (3, 2001 – Basımda) ​

• • Results of ray resection and amputation for ring avulsion injuries at the proximal interphalangeal joint E. Nuzumlalı, E. Orhun, K. Öztürk, S. Çepel, S. Polatkan Journal Hand Surgery (Br), 2003; 28B:6:578-581.​ ​

• • A case of isolated tuberculous tenosynovitis of the flexor tendon of the third finger of the hand. İ.B. Özçelik, T. Sulun, E. Orhun Acta Orthop. Traumatol Turc. 2006; 40(1): 82-83. ​

• • Results of open rotator cuff repair limited to partial acromioplasty of a rotator cuff tear with subacromial impingement syndrome. H. Orhun, V. Gürkan, M. Dursun, E. Orhun, B. Şener Journal of Joint Diseases Surgery 2010; 21(2):73-79.

FREE STATEMENTS

• • Microsurgical reconstruction of soft tissue losses in upper extremity traumas. S. Çepel, C. Gürbüz, E. Orhun, E Nuzumlalı, Ü. Kantarcı I. Travma ve Acil Cerrahi Kongresi, 19-23 Eylül, 1995.

• • Congenital trigger thumb. Ü. Kantarcı, S. Gür, E. Nuzumlalı, S. Tüzüner, S. Çepel, AT. Aydın, E. Orhun 6th Congress Of the International Circle Of Friends T.S.O.T., Antalya, Mayıs 24-27,1996.

• • Evaluation of the congenital syndactyly cases. E. Nuzumlalı, E. Orhun, C. Gürbüz, S. Çepel, Ü. Kantarcı, O. Bayrı, O. Polatkan 6th Congress Of the International Circle Of Friends T.S.O.T., Antalya, Mayıs 24-27,1996.

• • Our results with Paneva-Holevich method in flexor tendon reconstructions in the second region. Ü. Kantarcı, C. Gürbüz, E. Orhun, O. Bayrı 5. National Hand Surgery and Upper Extremity Congress, Denizli, Ekim 26-29, 1996.

• • Evaluation of primary median nerve repairs at the wrist level in terms of sensory recovery. S. Polatkan, E. Orhun, O. Polatkan, O. Bayrı 5. National Hand Surgery and Upper Extremity Congress, Denizli, Ekim 26-29, 1996.

• • Interpositional “T”vein grafts for revascularisation of limbs and free flaps. E. Orhun, O. Bayrı, Ü. Kantarcı, E. Nuzumlalı, O. Polatkan F.E.S.S.H. Fifth Congress 1998, February 25-28,1998, Vienna. Austria.

• • Late results of 48 thumb replantation. Ü. Kantarcı, S. Çepel, C. Gürbüz, E. Orhun, S. Polatkan F.E.S.S.H. Fifth Congress 1998, February 25-28,1998, Vienna. Austria.

• • The late functional results of above elbow replantations. Ü. Kantarcı, S. Çepel, C. Gürbüz, E. Orhun, E. Nuzumlalı 7th Congress of the International Federation Of Societies for Surgery of the Hand (IFSSH), May 24-28, 1998, Vancouver, Canada.

• • Long term results of primary flexor pollicis longus tendon repairs. O. Polatkan, E. Orhun, S. Polatkan, S. Çepel, Ü. Kantarcı 7th Congress of the International Federation Of Societies for Surgery of the Hand (IFSSH), May 24-28, 1998, Vancouver, Canada.

• • Is 4th digit ray resection a salvage procedure? E. Orhun, E. Nuzumlalı, S. Polatkan, Ü. Kantarcı, C. Gürbüz 7th Congress of the International Federation Of Societies for Surgery of the Hand (IFSSH), May 24-28, 1998, Vancouver, Canada.

• • Travmatik aksiyal karpal dislokasyon evaluation of the cases. E. Nuzumlalı, E. Orhun, S. Polatkan 6. National Hand Surgery and Upper Extremity Congress, Bursa, Ekim 26-29, 1998.

• • Factors affecting functional outcomes in major extremity replantations. E. Orhun, E. Nuzumlalı, Ü. Kantarcı, S. Çepel 7. National Hand Surgery and Upper Extremity Congress, İstanbul, Mayıs 19-22, 2000.

• • Long-term results of vascular and nervous island flaps used in thumb injuries. E. Orhun, K. Öztürk, S. Polatkan, O. Polatkan 7. National Hand Surgery and Upper Extremity Congress, İstanbul, Mayıs 19-22, 2000.

• The comparison of ulnar shortening for distal radioulnar joint pathologies. E. Orhun, H. Orhun, LRS. Scheker 8th Congress of the International Federation Of Societies for Surgery of the Hand (IFSSH), June 10-14, 2001, İstanbul, Turkey. ​

• 1970- 1975 Ankara primary school
• 1975- 1978 Karşıyaka Middle School
• 1978- 1981 İzmir Atatürk high school
• 1981- 1987 İstanbul University Cerrahpasa Faculty of Medicine
• 1987- 1989 16 No’lu Mother Child Health and Family Planning / Batıkent- Ankara
• 1990- 1994 Trakya University Faculty of Medicine- Orthopedics and Traumatology Research Assistant