Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 15, Issue 2, pp 175–183 | Cite as

Arthroscopic collagen meniscus implant results at 6 to 8 years follow up

  • Stefano ZaffagniniEmail author
  • Giovanni Giordano
  • Alberto Vascellari
  • Danilo Bruni
  • Maria Pia Neri
  • Francesco Iacono
  • Elizaveta Kon
  • Mirco Lo Presti
  • Maurilio Marcacci


Meniscal substitution is a fundamental procedure to prevent osteoarthritis of the knee after massive meniscectomy. Stone, Steadman and Rodkey have developed a bioreadsorbable collagen matrix (CMI) which acts as a scaffold to restore the original medial meniscal. The objective of this study was to prospectively evaluate the results of CMI implantation at a follow up from a minimum of 6 to a maximum of 8 years. Eight patients (mean age 25) were evaluated at a final observation point from 6 to 8 years after CMI implantation. Inclusion criteria were an irreparable meniscal tear or a previous meniscectomy involving the medial meniscus. Follow up evaluation included Cincinnati Knee Rating Scale (CKRS), IKDC, subjective evaluation and X-ray and MRI control. There were no complications related to the device. All patients were able to return to day activities without limitations 3 months after surgery. Both subjective CKRS score and objective IKDC score showed improvement in all cases except one patient with an ACL re-injury. In two cases scores were slightly worse from 2 years after surgery to the final observation point. The other five cases obtained maximum score at final follow-up. In four cases the absence of pain remained until the final observation point, while in four cases a low entity of pain was described at long term follow-up. MRI showed in five cases mixoid degeneration signal, two had normal signal with reduced size, while one patient had no recognizable implant. Six patients had preserved cartilage and articular space, with no changes respect to pre-op control. Arthroscopic second look evaluation has been performed in three cases, revealing in two cases the presence of the implant, although with a reduced size respect to the original one, while in one case the CMI was almost disappeared. Our small series of eight patients prospectively followed from 6 to 8 years of follow-up has shown highly satisfactory results. Although the aspect of the implant was mostly abnormal, the implant may have helped reduce the deterioration of the knee joint at final observation time.


Meniscus Collagen Arthroscopic Implant DJD (degenerative joint disease) 


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Stefano Zaffagnini
    • 1
    Email author
  • Giovanni Giordano
    • 1
  • Alberto Vascellari
    • 1
  • Danilo Bruni
    • 1
  • Maria Pia Neri
    • 1
  • Francesco Iacono
    • 1
  • Elizaveta Kon
    • 1
  • Mirco Lo Presti
    • 1
  • Maurilio Marcacci
    • 1
  1. 1.Biomechanics DepartmentRizzoli Orthopaedic InstituteBolognaItaly

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