Radiological considerations of posterior cervical lateral mass fixation using plate and screw

Seung Hwan Yoon, Hyoung Chun Park, Heon Seon Park, Eun Young Kim, Yoon Ha, Chong Kweon Chong, Seung Min Kim, Dae Cheol Rim

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The aim of this study is to determine whether the posterior cervical fusion methods with the plate-screw system applied to the lateral mass of cervical spine are radiologically safe to patients. The lateral cervical X-rays and CT scans were done on 40 normal adults without cervical problem. Based on Roy-Camille and Magerl's method, the theological trajectory of screw was shown on films and the parameters were measured. The study based on Roy-Camille's method showed less than one percent chance of injury on the facet joint and the mean depth of the screw to be 10.5 ± 1.4 mm. On the other hand, Magerl's method showed the mean depth of screw to be 11.9 1.5 mm which is slightly larger than that of Roy-Camille's method and no chance of facet injury occurred. A reduced lateral angle of screw (19.6 ± 3.5°) performed with the concept based on Magerl's method resulted a longer depth of screw (13.5 ± 2.1 mm). Both Roy-Camille and Magerl's methods seemed to be radiologically safe to normal persons. However, the authors recommend the reduced lateral angle (19.6 ± 3.5°) of screw based on the Magerl's method more than an original Magerl's methods.

Original languageEnglish
Pages (from-to)406-412
Number of pages7
JournalYonsei medical journal
Issue number3
Publication statusPublished - 2004 Jun 30

All Science Journal Classification (ASJC) codes

  • General Medicine


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