Development and Evaluation for the Micro-Movement Structure of Interspinous

척추극돌간 미세움직임 재현 보형물의 개발 및 평가

  • 박준식 ((의)장산의료재단 이춘택병원 로봇관절연구소) ;
  • 서태일 (인천대학교 기계공학과) ;
  • 배종석 (인천대학교 대학원 기계공학과) ;
  • 윤길상 (한국생산기술연구원 정밀금형팀)
  • Published : 2006.06.01

Abstract

Existing orthopedic implants such as pedicle screw and spinal cage were designed to fix the spinal structure. But, nowadays, physicians want to rehabilitate there original functions. To achieve this request, we studied micro-movable structure for interspinous. As a first step, we designed interspinous structure by 3D CAD to join each spinous processes. Next, we simulate it with various factors such as the thickness of micro-movement structure and the design of clip. At last, we performed static compressive test to satisfy the failure load of 339N and dynamic endurance test of 1.2M cycle. As a result, we developed interspinous implant and did several surgery to evaluated its satisfaction.

References

  1. Kim, K. T., Lee, S. U., Kim, Y. W., Hong, G. P. and Mun, M. S., 1998, 'A Biomechanical Study of Screw Designs of Transpedicular Screw on the Fixation Strength,' J. of Korean Orthop Assoc, 33, pp. 350-707
  2. Lim, J. K. and Wong, H. K., 2004, 'Variation of the cervical spinal Torg ratio with gender and ethnicity,' The Spine Journal 4, pp. 396-401 https://doi.org/10.1016/j.spinee.2003.11.011
  3. Herzog, R. J., Wiens, J. J., Dillingham, M. F. and Sontag, M. J., 1991, 'Normal cervical spine morphometry and cervical spinal stenosis in asymptomatic professional football players. Plain film radiography, multiplanar computed tomography, and magnetic resonance imaging,' Spine, 16, pp. 178-186 https://doi.org/10.1097/00007632-199106001-00001
  4. Gupta, S. K., Roy, R. C. and Srivastava, A., 1982, 'Sagittal diameter of cervical canal in normal Indian adults,' Clin Radiol 33, pp. 681-685 https://doi.org/10.1016/S0009-9260(82)80403-0
  5. George, T. R., 1980, An orthopaedist looks at finite element analysis, Finite elements in biomechanics, John Wiley & Sons Ltd, 1st ed., pp. 1-7
  6. Boyer, R., Welsch, G. and Colling, E. W., 1994, Materials Properties Handbook: Titanium Alloys, eds. ASM International, Materials Park, OH
  7. Metals Handbook Vol. 2 - Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, 1990, ASM International 10th Ed
  8. Suk, S. I., 1997, Spinal Surgery, Newest Medical Publisher, pp. 32-48
  9. Hong, H. P., Oh, S. H. and Seo, N. S., 1989, 'A Study on the Machinability of Titanium,' KSPE, Vol. 6, No. 1, pp. 45-51
  10. Duncan, E. T. S., Johanna, C. L. and Katharine, J. M., 2000, 'Spinous Process Strength,' SPINE, Vol. 25, No. 3, pp. 319-323 https://doi.org/10.1097/00007632-200002010-00010