Radiological Considerations of Posterior Cervical Lateral Mass Fixation Using Plate and Screw.
10.3349/ymj.2004.45.3.406
- Author:
Seung Hwan YOON
1
;
Hyoung Chun PARK
;
Heon Seon PARK
;
Eun Young KIM
;
Yoon HA
;
Chong Kweon CHONG
;
Seung Min KIM
;
Dae Cheol RIM
Author Information
1. Department of Neurosurgery, Inha University Hospital, College of Medicine, Inha University, Incheon, Korea. nsysh@inha.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Posterior cervical fusion;
plate-screw system;
lateral mass;
facet joints;
facet injury
- MeSH:
Adult;
Bone Plates;
Bone Screws;
Cervical Vertebrae/*radiography/*surgery;
Female;
Human;
Male;
*Spinal Fusion;
Support, Non-U.S. Gov't;
Tomography, X-Ray Computed/*methods
- From:Yonsei Medical Journal
2004;45(3):406-412
- CountryRepublic of Korea
- Language:English
-
Abstract:
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+/-1.4mm. On the other hand, Magerl's method showed the mean depth of screw to be 11.9+/-1.5mm 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 degrees) performed with the concept based on Magerl's method resulted a longer depth of screw (13.5+/-2.1mm). 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 degrees) of screw based on the Magerl's method more than an original Magerl's methods.
