1. Celik N. ALT Flap in Postmastectomy Breast Reconstruction. 25-27 September 2003. Breast Reconstruction Symposium. Mersin, Turkey
 

2. Celik N. Perforator Flaps: Clinical Use and Technique of Harvest. 19-20 September , XX Congresso Nazionale della Societa Italiana di Microchirurgia . Firenze, Italy.
 

3. Celik N. Toe-to-Hand transplantation: Taiwan Experience. 19-20 September , XX Congresso Nazionale della Societa Italiana di Microchirurgia . Firenze, Italy.
 

4. Celik N. Head and Neck Microsurgery. 13-16 October 2002. The 9th International Practical Course in Microsurgery of Vessel and Nerves. Bucharest, Romania.
 

5. Celik N. Introduction to Perforator Flaps. 13-16 October 2002. The 9th International Practical Course in Microsurgery of Vessel and Nerves. Bucharest, Romania
 

6. Celik N, Wei FC, Chen HC. Combined anterolateral thigh flap and vascularized fibula osteoseptocutaneous flap in reconstruction of extensive composite mandibular defects. 16-19 October 2002. The 4th Congress of the Hand and the 5th Congress of Microsurgery. Bucharest, Romania.
 

7. Celik N, Wei FC, Chen HC. Technique and Strategy in Anterolateral Thigh Perforator Flap Surgery-Based on Analyzes of 15 Complete and Partial Failures in 439 Cases. 16-19 October 2002. The 4th Congress of the Hand and the 5th Congress of Microsurgery. Bucharest, Romania.
 

8. Celik. N. Profiloplasty. “Nose & Surroundings 2007" The Italian Way to Facial Plastic Surgery Rome - Ekim 23-27, 2007
 

9. Celik N. Augmentation Mentoplasty with Fat Injection in Rhinoplasty Patients. April 7-9, 2006. MESAPS Congress, Nice France.
 

10. Celik N, Wei FC, Chen HC, Erol O. A Rare Precancerous Condition of Oral Mucosa: Submucous Fibrosis and its Management. June 11-14, 2003. 2nd WSRM Congress. Heidelberg, Germany
 

11. Celik N, Wei FC, Chen HC, Erol O. Secondary Vascularized Bone Graft after Initial Reconstruction Plate and Soft Tissue Free Flap Reconstruction in Composite Mandibular Defects. June 11-14, 2003. 2nd WSRM Congress. Heidelberg, Germany
 

12. Celik N, Wei FC, Erol O. Technique in Anterolateral Thigh Free Flap Surgery and Strategy in Perforator Anterolateral Thigh Free Flaps. May 29-31, 2003. 14th annual meeting of EURAPS. Vienna, Austria.
 

13. Celik N,Wei FC, Lin CH, Cheng MH, Chen HC, Jeng SF, Kuo YR, Huang CH, TsangKL. Technique and Strategy in Anterolateral Thigh Perforator Flap Surgery_Based on Analysis of 15 Complete and Partial Failures in 439 Cases. October 23-26, 2002. The 6th international course on perforator flaps. Taoyuan Taiwan.
 

14. Wei FC, Suominen S, Cheng MH, Celik N, Lai YL, Chin CH. Anterolateral thigh flap for postmastectomy breast reconstruction. October 23-26, 2002. The 6th international course on perforator flaps. Taoyuan Taiwan.
 

15. Alper M, Gundogan H, Ozek C, Celik N, Bilkay U, Kılıc M, Yuzer Y, Tokat Y. 20-23 June, 2002. Application of microvascular surgery in the reconstruction of hepatic artery during living donor related liver transplantation. 6th congress of European Federation of Societies for Microsurgery. Istanbul, Turkey.
 

16. Alper M, Gundogan H, Ozek C, Celik N, Bilkay U, Kılıc M, Yuzer Y, Tokat Y. 20-23 June, 2002. A new method in hepatic graft revascularization using left gastric artery with microvascular technique during living donor related liver transplantation. 6th congress of European Federation of Societies for Microsurgery. Istanbul, Turkey.
 

17. Celik N, Wei FC, Chen HC, Cheng MH, Huang WC. Combined anterolateral thigh flap and vascularized fibula osteoseptocutaneous flap in reconstruction of extensive composite mandibular defects. October 28- November 2, 2001. Inaugural Congress of World Society of Microsurgery. Taipei, Taiwan
 

18. Celik N, Wei FC, Chen HC, Cheng MH, Huang WC, Tsai FC, Chen YC. Osteoradionecrosis of the Mandible after Mandibular Surgery. October 28- November 2, 2001. Inaugural Congress of World Society of Microsurgery. Taipei, Taiwan
 

19. Celik N, Wei FC, Lin CH, Cheng MH, Chen HC, Jeng SF, Kuo YR. Technique and Strategy in Anterolateral Thigh Perforator Flap Surgery. October 28- November 2, 2001. Inaugural Congress of World Society of Microsurgery. Taipei, Taiwan
 

20. Celik N, Wei FC, Chen HT, Chuang DCC, Jeng SF, Lin YT. A Comparison Between Radial Forearm and Anterolateral Thigh Flaps. October 28- November 2, 2001. Inaugural Congress of World Society of Microsurgery. Taipei, Taiwan
 

21. Jain V, Celik N, Chen YC, Huang WC, Huang YL, Lin SY, Kan TC, Chen HC, Chen SHT, Cheng MH, Wei FC. Versatile Anterolateral Thigh Free Flap- a Panacea for all Soft Tissue Reconstruction- Experience of 672 Cases. October 28- November 2, 2001. Inaugural Congress of World Society of Microsurgery. Taipei, Taiwan
 

22. Celik N. Combined anterolateral thigh flap and vascularized fibula osteoseptocutaneous flap in reconstruction of extensive composite mandibular defects. January 12-15, 2002. 17th Annual Meeting of the American Society for Reconstructive Microsurgery. Cancun, Mexico.
 

23. Celik N.A Comparison between Radial Forearm and Anterolateral Thigh Flaps. January 12-15, 2002. 17th Annual Meeting of the American Society for Reconstructive Microsurgery. Cancun, Mexico.
 

24. Celik N. Technique and Strategy in Anterolateral Thigh Perforator Flap Surgery_Based on Analysis of 15 Complete and Partial Failures in 439 Cases. January 12-15, 2002. 17th Annual Meeting of the American Society for Reconstructive Microsurgery. Cancun, Mexico.
 

25. Celik N,Gurler T, Totan S, Songur E, Sakarya M. Prophylactic use of ondansetron in craniofacial operations in children. September 3-6, 1998 I. European appointed XX. National Congress of the Turkish Society of Plastic Surgeons Istanbul, Turkey
 

26. Songur E, Alper M, Bilkay U, Celik N, Erdem O. X-shaped meatoplasty and urethral advancement for distal hypospadias treatment. September 3-6, 1998 I. European appointed XX. National Congress of the Turkish Society of Plastic Surgeons Istanbul, Turkey
 

27. Gurler T, Bilkay U, Gorken C, Guner U, Celik N, Alpaydin T, Mutluer S, Songur E. Management of sincipital (frontoethmoidal) encephalocele. September 3-6, 1998 I. European appointed XX. National Congress of the Turkish Society of Plastic Surgeons Istanbul, Turkey
 

28. Gurler T, Alper M, Bilkay U, Gundogan H, Celik N, Songur E, Akin Y, Cagdas A. Vertical rectus abdominis musculocutaneous (VRAM) flap for inguinal defects. September 3-6, 1998 I. European appointed XX. National Congress of the Turkish Society of Plastic Surgeons Istanbul, Turkey
 

29. Totan S, Kececi Y, Songur E, Mutluer S, Gurler T, Celik N, Guner U. Complications in craniofacial surgery. June 1997. 8th European Congress IPRAS, Lisbon, Portugal.