1.Matsuda Y, Ishii Y: The characteristics of the yachting injury. The Asia Pacific Orthopaedic Association. Adelaide. Australia. 2002

2.Matsuda Y, Ishii Y: In vivo laxity of LCS mobile bearing prostheses. 48th ORS Feb. 10-13. Dallas TX. 2002.

3.Ishii Y, Matsuda Y: Comparison of the knee laxity between posterior cruciste ligament retaining and substituting total knee arthroplasty. 69th American Academy of Orthopaedic Surgeons. Feb. 13-17. Dallaa TX. 2002.

4.Matsuda Y, Ishii Y: In vivo laxity of LCS mobile bearing prostheses PCL-retating vs-sacrificing. 4th Biennial ISAKOS Congress in Auckland, New Zealand. Mar. 10-14. 2003.

5.Ishii Y, Matsuda Y: Restriction of weight bearing is unnecessary in mobile bearing total knee arthroplasty. 4th Biennial ISAKOS Congress in Auckland, New Zealand. Mar. 10-14. 2003.

6.Ishii Y, Matsuda Y: Arthrometric evaluation in cementless mobile-bearing total knee arthroplasty. 50th ORS Mar. San Francisco. 2004.

7.Ishii Y, Matsuda Y: In vivo Kinematics and Clinical Evaluation of Meniscal Bearing Knee Prostheses Innovations in Knees, Hips, and Extremities. Apr. 26-28. Australia. 2004

8.Matsuda Y, Ishii Y: Coronal Laxity in vivo mobile-bearing total knee arthroplasty. 50th ORS Mar. San Francisco. 2004.

9.Matsuda Y, Ishii Y: Coronal laxity affects the range of motion after total knee arthroplasty. 50th ORS Mar. San Francisco. 2004.

10.Matsuda Y, Ishii Y, Noguchi H: Dynamic external fixator for distal radius fracture ( F-wrist)

11.Matsuda Y, Ishii Y, Noguchi H: Varus and valgus balance affects the clinical outcome after mobile-bearing total knee arthroplasty. 72th American Academy of Orthopaedic Surgeons. Feb. Washington. D.C. 2005.

12.Matsuda Y, Ishii Y, Noguchi H: Changes in bone mineral density of the calcaneus following mobile bearing TKA. 5th Biennial ISAKOS Congress in Hollywood, Florida, USA 2005.

13.Matsuda Y, Ishii Y, Noguchi H: Comparison of anteroposterior lazity in mobile bearing prostheses in vivo using two different arthrometers. 5th Biennial ISAKOS Congress in Hollywood, Florida, USA 2005.

14.Matsuda Y, Ishii Y, Noguchi H: Varus-valgus balance affects the clinical outcome after mobile-bearing total knee arthroplasty. 2- to 5-Year Follow-Up. 7th EFFORT congress. June. Lisbon 2005

15.Noguchi H, Ishii Y, Matsuda Y: Minimal invasion and minimal internal fixation for the severly displaced intra-articular calcaneal fractures using medial and anterolateral approach. 2nd Joint Meeting of International Federation of Foot and Ankle Societies. Sep. Naples.Italy.2005

16.Ihii Y, MatsudaY, Noguchi H and Kiga H: Effect of anesthesia on measurement of sagittal laxity in mobile-bearing total knee arthroplasty. 52th Annual Meeting Orthopaedic research Society. Mar.19-22.　Chicago,USA 2006

17.Noguchi H, Ishii Y, Matsuda Y and Hasegawa A: Minimum incision surgery for severely displaced intraarticular calcaneus fractures. 73rd Annual Meeting of the American Acamdemy of Orthopaedic Surgeons. Mar.22-26. Chicago, USA 2006.

18.Yamako G, Ishii Y, Hara T, Matsuda Y, Noguchi H and Endo Y: Pin-bone stress in external fracture fixation devices for the distal end of the radius. 52nd Annual Meeting Orthopaedic Research Society. Mar. 19-22. Chicago, USA. 2006.

19.Matsuda Y, Melinda K Harman, Yoshinori Ishii, Hiroshi Kiga, Kim Mitchell, W.Andrew Hodge：Anteroposterior knee joint stability after total knee replacement
53th Annual Meeting of the Orthopaedic Research Society Feb,11-14 2007 San Diego, CA

20. Matsuda Y. Ishii Y, Noguchi Y, Takeda M, Hirakawa K, Tatsumi I: Changes of varus-valgus laxity after mobile-bearing Total Knee Arthroplasty 4- to 8-Year Follow-Up 8th EFFORT (European Federation of National Associations of Orthopaedics and Traumatology) Congress
May 11-15, 2007 Italy Florence

21. Matsuda Y. Ishii Y, Noguchi Y, Takeda M, Hirakawa K, Tatsumi I:Varus-valgus balance changes after mobile-bearing total knee arthroplasty. 8th EFFORT (European Federation of National Associations of Orthopaedics and Traumatology) Congress. May 11-15, 2007 Italy Florence

22. Matsuda Y. Ishii Y, Noguchi Y, Takeda M, Hirakawa K, Tatsumi I: Comparison of the position of the popliteal artery between posterior cruciate ligament retaining and sacrificing prostheses in the same patients. 8th EFFORT (European Federation of National Associations of Orthopaedics and Traumatology) Congress. May 11-15, 2007 Italy Florence

23. Matsuda Y. Ishii Y, Noguchi Y, Takeda M, Hirakawa K, Tatsumi I:The relationships between changes of the Patella tendon’s shape and range of motion after TKA. 8th EFFORT (European Federation of National Associations of Orthopaedics and Traumatology) Congress. May 11-15, 2007 Italy Florence

24. Matsuda Y. Ishii Y, Noguchi Y, Takeda M, Hirakawa K, Tatsumi I: In vivo laxity of low contact stress mobile-bearing prostheses: comparison of the meniscal-bearing and rotating platform TKA in the same patients. 8th EFFORT (European Federation of National Associations of Orthopaedics and Traumatology) Congress. May 11-15, 2007 Italy Florence