gms | German Medical Science

54. Jahrestagung der Norddeutschen Orthopädenvereinigung e. V.

Norddeutsche Orthopädenvereinigung

16.06. bis 18.06.2005, Hamburg

Early results in the treatment of lumbar spinal stenosis by segmental angulation (IPD – interspinous process decompression) with a new implant (X - stop)

Meeting Abstract

  • corresponding author A. Reinhardt - Orthopädische Fachklinik Oberlinhaus, Abt. Becken- und Wirbelsäulenchirurgie, Potsdam
  • B. Schmidt - Potsdam
  • T. Lang - Potsdam
  • D. Werner - Niederschmalkalden
  • P. Krause - München
  • P. Mark - Berlin
  • P. Simons - Köln
  • G. Godde - Düsseldorf

Norddeutsche Orthopädenvereinigung. 54. Jahrestagung der Norddeutschen Orthopädenvereinigung e.V.. Hamburg, 16.-18.06.2005. Düsseldorf, Köln: German Medical Science; 2005. Doc05novEP98

The electronic version of this article is the complete one and can be found online at:

Published: June 13, 2005

© 2005 Reinhardt et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.




A recently published prospectively randomized FDA study has shown a significant benefit of IPD (X-stop) compared with non-operative treatment of lumbar stenosis.

Material and method

Within the last 18 month we operated patients with x-stop, including a maximum of two lumbar levels. Some patients received this treatment alone, in some patients it was used in addition to a spinal fusion in different levels. Only the patients treated by IPD were included in the study. All patients were examined using the "Zurich Claudication Questionnaire - ZQC" (Stucki et al. 1995) preoperatively and 6-12 months postoperatively.The score investigates amount of clinical symptoms, physical function and patient satisfaction.


The average age was 67 years. 82% respectively 85% had a significant improvement considering clinicals symptoms respectively physical function. 85% of all patients were satisfied by the treatment. There were no perioperative complications such as infection, loosening of the implant, nerve root lesion or dura leakage. 2 patients needed revision of the implant due to lack of improvement and persisting claudication symptoms in one patient resp. increasing symptoms in the other patient.


The overall results of our patients and the results of several multi-centered studies show that the new method of IPD by the X-stop-implant is a good and safe method of treatment in the early stages of lumbar spinal stenosis.