Archives of Orthopaedic and Trauma Surgery

, Volume 113, Issue 3, pp 117–120 | Cite as

The Cenos hollow stem in total hip arthroplasty: first experiences in a prospective study

  • J. Schmidt
  • M. H. Hackenbroch
Original Article

Abstract

Due to its hollow construction, which gives it elasticity, the Cenos hollow stem (Artos) reduces stress shielding in the intertrochanteric region and reduces bone remodelling at the distal tip after implantation of a cementless stem in the femoral canal. This should contribute to a longer implant survival time and reduce the number of revision procedures required for implant loosening. Its anatomical shape means that it fits well in the femoral canal and additionally improves load distribution. We prospectively studied patients in whom the Cenos hollow stem was implanted in our clinic. The clinical results after 1 year and 40 implantations are very satisfactory. No thigh pain has been reported so far, which is probably due to the effectiveness of the increased elasticity and the better fit of the stem. Preoperative planning with a special template is very accurate, and in combination with the anatomical shape of the stem makes the surgical procedure easy. The relatively high number of ectopic ossifications found in our series is obviously not related to the stem itself. In our opinion it is a result of the lateral approach. However, no clinical disadvantage resulted from these ossifications.

Keywords

Clinical Result Survival Time Bone Remodelling Lateral Approach Load Distribution 

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References

  1. 1.
    Bobyn JD, Goto H, Krygier JJ, Glassman AH, Brooks CE, Miller JE (1990) The effect of stem stiffness on femoral bone resorption after canine porous coated hip replacement. 36th Annual Meeting, Orthopaedic Research Society, New Orleans, LouisianaGoogle Scholar
  2. 2.
    Brooker AF, Bowerman JW, Robinson RA, Riley LH (1973) Ectopic ossification following total hip replacement. J Bone Joint Surg [Am] 55-A:1629–1632Google Scholar
  3. 3.
    Cameron HU, Trick L, Shepard B, Turnbull A, Noiles D, McTighe T (1990) An international multi-center study on thigh pain in total hip replacement. American Academy of Orthopaedic Surgeons Meeting, New Orleans, LouisianaGoogle Scholar
  4. 4.
    Engh CA, Bobyn JD (1988) The influence of stem size and extent of porous coating on femoral bone resorption after primary cementless hip arthroplasty. Clin Orthop Rel Res 231:7–28Google Scholar
  5. 5.
    Harris WH (1969) Traumatic arthritis of the hip after dislocation and acetabular fractures: treatment by mold arthroplasty. J Bone Joint Surg [Am] 51-A:737–755Google Scholar
  6. 6.
    Heimke G, Stock D (1986) Zur Frage postoperativer Schmerzen bei zementfreien Hüftschaftprothesen. Z Orthop 124:643–645Google Scholar
  7. 7.
    Jantsch S, Hackl H, Leixnering M, Schwägerl W (1990) Intraoperative Schaftfissuren — eine mögliche Ursache für postoperative Schaftschmerzen nach zementfreier Hüftgelenksimplantation. Z Orthop 128:144–148Google Scholar
  8. 8.
    Johnston RC, Fitzgerald RH, Harris WH, Poss R, Mü1ler ME, Sledge CB (1990) Clinical and radiographic evaluation of total hip replacement. J Bone Joint Surg [Am] 72-A:161–168Google Scholar
  9. 9.
    Kranz C (1988) Beitrag zur Entwicklung eines elastisch angepaßten Hüftendoprothesenschaftes. In: Boenick U (ed) Biomedizinische Technik. Forschungsberichte für die Praxis, vol 2. Schiele & Schön, BerlinGoogle Scholar
  10. 10.
    Maistrelli GL, Fornasier V, Binnington A, McKenzie K, Sessa V, Harrigton I (1991) Effect of stem modulus in a total hip arthroplasty model. J Bone Joint Surg [Br] 73-B:43–46Google Scholar
  11. 11.
    Mattheck C, Vorberg U, Kranz C (1990) Die Auswirkungen der Hohlschaftendoprothese auf die Spannungsverteilung in der Kortikalis. Biomed Technik 35:316–319Google Scholar
  12. 12.
    Schmidt J, Hackenbroch MH (1993) Röntgengeführte Implantatvermessung im Femurschaft: Methodik, Leistungsfähigkeit und Konsequenzen für die CENOS-Hohlschaftprothese. 15th Munich Symposium on Experimental Orthopedics, MunichGoogle Scholar

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • J. Schmidt
    • 1
  • M. H. Hackenbroch
    • 1
  1. 1.Klinik und Poliklinik für Orthopädie der Universität zu KölnKölnGermany

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