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Anatomical Science International

, Volume 93, Issue 2, pp 203–206 | Cite as

A new superficial landmark for the odontoid process: a cadaveric study

  • Christian Fisahn
  • Michael J. Montalbano
  • Joe Iwanaga
  • Marc Moisi
  • Marios Loukas
  • Jens R. Chapman
  • Rod J. Oskouian
  • R. Shane Tubbs
Original Article

Abstract

When image guidance is not available or when there is a need to confirm the findings of such technology, superficial landmarks can still play a role in providing surgeons with estimations of the position of deeper anatomical structures. To our knowledge, surface landmarks for the position of the odontoid process have not been investigated. We have therefore performed an anatomical study to investigate such a landmark. One-centimeter metallic rods were placed on the philtrum of the upper lip of 20 cadaveric head specimens. To assess the position relative to the odontoid process, we took lateral and anteroposterior radiographs and recorded the measurements. Descriptive findings from radiographic observations indicated a reasonable approximation between the philtrum and the midpoint of the odontoid process. 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.

Keywords

Odontoid process Philtrum Cervical spine Axis Landmarks Anatomy 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare no conflicts of interest. No funding was received.

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Copyright information

© Japanese Association of Anatomists 2017

Authors and Affiliations

  • Christian Fisahn
    • 1
    • 2
    • 3
  • Michael J. Montalbano
    • 2
  • Joe Iwanaga
    • 2
  • Marc Moisi
    • 5
  • Marios Loukas
    • 4
  • Jens R. Chapman
    • 1
  • Rod J. Oskouian
    • 1
  • R. Shane Tubbs
    • 2
  1. 1.Swedish Neuroscience InstituteSwedish Medical CenterSeattleUSA
  2. 2.Seattle Science FoundationSeattleUSA
  3. 3.Department of Trauma Surgery, BG University Hospital BergmannsheilRuhr University BochumBochumGermany
  4. 4.Department of Anatomical SciencesSt. George’s UniversityTrue BlueGrenada
  5. 5.Department of NeurosurgeryWayne State University DetroitDetroitUSA

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