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  • radiographs
  • Plain radiographs demonstrating a highly unstable C1-2 region with 8 mm of movement on flexion (A) from a neutral position (B) associated with discontinuity between the odontoid and the body of C-2. (thejns.org)
  • facet
  • [ 4 ] In addition, the rheumatoid pannus and the associated inflammation can weaken the transverse ligaments, alar ligaments, and facet capsules early in the disease process. (medscape.com)
  • screw
  • present in a stepwise fashion the technique of odontoid screw placement using the Medtronic O arm navigation system and describe their initial institutional experience with this surgical approach. (neurocirugia.com)
  • A standardized protocol for navigated odontoid screw placement was generated from the collective experience at the authors' institution. (neurocirugia.com)
  • One patient had an odontoid screw placed. (thejns.org)
  • Invagination
  • Removal of the odontoid is for instance conducted for decompression in patients with rheumatoid arthritis and basilar invagination. (egms.de)
  • approaches
  • Though this novel route appears to be less traumatic and could have certain advantages compared to other approaches to the odontoid, further experience will be necessary to evaluate this approach and its range of indication. (egms.de)
  • bony
  • Based on our results, we suggest that the philtrum of the upper lip can serve as a first line estimation of the position of the odontoid process and can assist in verifying this bony structure following the use of image guidance. (springer.com)