IMPROVEMENT OF THE EFFICIENCY OF LASER WELDING OF THE INTRAMEDULLARY EXTENSIBLE ROD ELEMENTS THROUGH OPTIMIZING RIB GEOMETRY


Cite item

Full Text

Abstract

The paper considers the problem of assembling the components of the innovative design of intramedullary extensible rod for lockable osteosynthesis, which was developed in Togliatti State University. Nowadays, the medical practice with application of intramedullary extensible rods is one of the most advanced methods of treatment of long bones fractures. The reducing of operating time, patient’s blood loss, and the X-ray dose of radiation of a patient and the staff provides opportunities for wide use of such structures in medical practice. That is why their development is a critical task. While finally assembling the device, one should take into account the rod structure technological characteristics as well as complex specificity of loads during the operational use. While carrying out experimental research, the authors used LKD4-015.150 laser machine for welding the rod components. The welding of the rod was performed in argon at a gas rate of 6 - 10 l/h with the heating zone additional protection. When welding the rod components with different thickness, the conditions of formation and the welding seam quality against the initial (without technological recess) and the proposed (with a technological rectangular recess of the rod rib) options were considered as the factors of variation. The authors measured the microhardness of welding seam and welded elements against the initial and proposed options. When welding according to the initial version, the rod tube melting through occurs. While analyzing microhardness in welding according to the initial version, the significant increase in the welding seam microhardness against the welded components is established. This factor promotes the destruction of welding seam at the rod loading. When analyzing microhardness in welding according to the proposed variant, the author has determined that the value of welding seam microhardness is comparable to microhardness of welded components. In this case, the rod tube melts for 0.1 mm, what allows maintaining its plasticity and ensures the rod efficiency during its loading.

About the authors

Pavel Aleksandrovich Ogin

Togliatti State University, Togliatti

Author for correspondence.
Email: fantom241288@yandex.ru

postgraduate student

Russian Federation

Oleg Valentinovich Boychenko

Togliatti State University, Togliatti

Email: vissper@yandex.ru

PhD (Engineering), Associate Professor, assistant professor of Chair “Equipment and machinery production technologies”

Russian Federation

Oleg Nikolaevich Protsenko

Municipal clinical hospital № 5, Togliatti

Email: oleg.protzenko@yandex.ru

chief traumatologist-orthopedist of the city of Togliatti, PhD (Medicine), Head of traumatology department

Russian Federation

Mikhail Mikhailovich Krishtal

Togliatti State University, Togliatti

Email: krishtal@tltsu.ru

Doctor of Sciences (Physics and Mathematics), Professor

Russian Federation

References

  1. Tolga A., Fazıl C. A., Vecihi K., Yakup B. B., Ahmet A., Metin L., Baydar F. Diafiz Kırıklarında Genişleyebilir İntramedüller Çivi Sonuçlarımız [Our Results Of Treatment With Expandable Intramedullary Nails In Femoral Shaft Fractures]. Kocatepe Tip Dergisi, 2008, vol. 9, no. 3, pp. 11–15.
  2. Emanov A.A., Mitrofanov A.I., Borzunov D.Yu., Kolchin S.N. Experimental and clinical justification of combined osteosynthesis for long bone defects (preliminary report). Travmatologiya i ortopediya Rossii, 2014, no. 1, pp. 16–23.
  3. Öztürk H., Öztemür Z., Bulut O., Ünsaldi T. Complication following intramedullary fixation with a Fixion nail in a patient with osteogenesis imperfecta: A case report. Acta Orthopædica Belgica, 2005, vol. 71, no. 2, pp. 227–229.
  4. Barabash A.P., Barabash Yu.A. Fixion intramedullary fixation system in treatment of fractures, pseudoarthroses of long bones. Geniy ortopedii, 2010, no. 2, pp. 44–49.
  5. Kajzer A., Kajzer W., Marciniak J. Expandable intramedullary nail – experimental biomechanical evaluation. Archives of Materials Science and Engeneering, 2010, vol. 41, pp. 45–52.
  6. Barabash Y.A., Barabash A.P., Grazhdanov K.A. Efficiency types of osteosynthesis for fractures of the humerus and their consequences. Mezhdunarodny zhurnal prikladnykh i fundamentalnykh issledovaniy, 2014, no. 10, pp. 76–80.
  7. Zoccali C., Di Francesco A., Ranalletta A., Flamini S. Clinical and radiological midterm results from using the Fixion expandable intramedullary nail in transverse and short oblique fractures of femur and tibia. Jornal Orthopaed Traumatol, 2008, vol. 9, no. 3, pp. 123–128.
  8. Zhen T., Yu C., Xiao Z., Hai B., Zong P., Qi R. Femoral Midshaft Fractures: Expandable Versus Locked Nailing. Feature article, 2015, vol. 38, no. 4, pp. 314–318.
  9. Eldzarov P.E., Zelyanin A.S., Yamkovoy A.D. Complications and mistakes of the intramedullary blocking ostheosynthesis. Khirurgiya. Zhurnal im. N.I. Pirogova, 2012, no. 11, pp. 73–77.
  10. Steinberg E.L., Blumberg N., Dekel S. The fixion proximal femur nailing system: biomechanical properties of the nail and a cadaveric study. Journal of Biomechanics, 2005, vol. 38, no. 1, pp. 63–68.
  11. Çilli F., Mahiroğullari M., Pehlivan Ö., Kelkikçi K., Kuşkucu M., Kiral A., Avşar S. Şişirilebilir intramedüller çivilerle femur şaft kiriklarinin tedavisi [Treatment of femoral shaft fractures with expandable intramedullary nail]. Ulus Travma Acil Cerrahi Derg, 2009, vol. 15, no. 4, pp. 383–389.
  12. Stegemann J. Zur operativen Versorgung von per– bis subtrochanteren Femurfrakturen am Beispiel des Fixion PF–Nagels und des Classic–Nagels. Dissertation zur Erlangung des Grades eines Doktors der Medizin dem Fachbereich Medizin der Universität Hamburg vorgelegt von. Hamburg, 2005. 67 p.
  13. Barabash A.P., Norkin I.A., Barabash Yu.A., Barabash A.A., Norkin A.I. Sposob lecheniya dlitelno srastayushchikhsya perelomov i lozhnykh sustavov dlinnykh kostey [The method of treatment of durably healing fractures and false joints of long bones]. Patent RF, no. 2375006, 2009.
  14. Barabash A.P., Barabash Yu.A. Sposob intramedullyarnoy fiksatsii otlomkov s shirokim diametrom kostnomozgovogo kanala dlinnoy kosti [The method of intramedullary fixation of long pipe fragments with wide diameter of marrowy canal]. Patent RF, no. 2402298, 2010.
  15. Boychenko O.V., Protsenko O.N., Krishtal M.M. Sterzhen‘ dlya fiksatsii polozheniya i formy trubchatykh kostey [The rod for position and form fixation of pipe bones]. Patent RF, no. 100717, 2010.
  16. Krishtal M.M., Protsenko O.N., Boychenko O.V., Kotelnikov G.P. Sterzhen‘ dlya fiksatsii polozheniya i formy trubchatykh kostey [The rod for position and form fixation of pipe bones]. Patent RF, no. 2452426, 2012.
  17. Boychenko O.V., Protsenko O.N., Krishtal M.M. Zolotnik [Valve]. Patent RF, no. 119996, 2012.
  18. GOST 28915–91. Laser beam impulse welding. Button welds. Main types, design elements and dimensions. Moscow, Izdatelstvo standartov Publ., 1991. 9 p. (In Russian).
  19. Kotelnikov G.P., Protsenko O.N., Volova L.T., Lartsev Y.V., Zuev-Ratnikov S.D., Dolgushkin D.A., Tatarenko I.E., Shorin I.S., Kudashev D.S. Analysis of biocompatible materials for manufacturing expands self-locking intramedullary nail through the osteogenic fibroblast-like cell culture. Fundamentalnye issledovaniya, 2015, no. 2-23, pp. 5120–5123.
  20. Kazakov Yu.V., Korchagin P.V. Sposob sborki pod svarku plavleniem raznotolshchinnykh detaley [Method of assembling for fusion welding of different-thickness parts]. Author’s certificate USSR, no. 1704991, 1990.

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c)



This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies