Anterior Cervical Arthrodesis Using a "Stand Alone" Cylindrical Titanium Cage: Prospective Analysis of Radiographic Parameters.
Summary of "Anterior Cervical Arthrodesis Using a "Stand Alone" Cylindrical Titanium Cage: Prospective Analysis of Radiographic Parameters."
STUDY DESIGN.: Prospective, observational study. OBJECTIVE.: To evaluate biomechanical changes associated with cervical arthrodesis using a cylindrical titanium cage. SUMMARY OF BACKGROUND DATA.: Anterior cervical discectomy and fusion (ACDF) is the "gold standard" for treating cervical disc disease. In an effort to avoid the morbidity associated with autogenous bone graft harvesting, cervical cages are used to achieve fusion. The cages should allow for restoration and maintenance of natural disc height, angulations, and displacements at the operated levels. METHODS.: Fifty-four patients underwent standard ACDF using a "stand alone" cylindrical cage implant. Lateral radiographic views of the cervical spine were obtained before surgery, on the first day postoperatively, and at 12 months postoperatively. Disc height, vertebral alignment, angle of lordosis, and range of motion at operated levels were quantified prospectively by distortion compensated Roentgen analysis. RESULTS.: At 12 months postoperatively, solid fusion was achieved but the cylindrical cage failed to preserve disc height, prevent kyphosis, and preserve natural intervertebral alignment. We observed significant cage subsidence and malalignment. CONCLUSION.: We noticed several unfavorable outcomes when performing an analysis of radiographic parameters after ACDF using a cylindrical titanium cage. Thus, the use of a "stand alone" cylindrical cage in ACDF should be considered with caution.
From the *Department of Neurosurgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway; daggerFaculty of Medicine, The Norwegian University of Science and Technology, Trondheim, Norway; double daggerNational Centre of Spinal Disorders, St. Olav Univ
This article was published in the following journal.
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20581756
- DOI: http://dx.doi.org/10.1097/BRS.0b013e3181d259c1
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Medical and Biotech [MESH] Definitions
A network of nerve fibers originating in the upper four cervical spinal cord segments. The cervical plexus distributes cutaneous nerves to parts of the neck, shoulders, and back of the head, and motor fibers to muscles of the cervical spinal column, infrahyoid muscles, and the diaphragm.
A parameter usually used in PRENATAL ULTRASONOGRAPHY to measure the length of the uterine neck (CERVIX UTERI). Cervical length or its shortening is used to identify and prevent early cervical opening and PRETERM BIRTH.
The first cervical vertebra.
A calcification of the posterior longitudinal ligament of the spinal column, usually at the level of the cervical spine. It is often associated with anterior ankylosing hyperostosis.
The surgical fixation of a joint by a procedure designed to accomplish fusion of the joint surfaces by promoting the proliferation of bone cells. (Dorland, 28th ed)