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Posterior atlantoaxial fixation: a review of all techniques
Da-Geng Huang1, Ding-Jun Hao1, Bao-Rong He1
1Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi, 710054, China.
Background Context:
Posterior atlantoaxial fixation is an effective treatment for atlantoaxial instability. Great advancements on posterior atlantoaxial fixation techniques have been made in the past decades. However, there is no article reviewing all the posterior atlantoaxial fixation techniques yet.
Purpose:
The aim was to review the evolution and advancements of posterior atlantoaxial fixation.
Study Design:
This was a literature review.
Methods:
The application of all posterior fixation techniques in atlantoaxial stabilization, including wiring techniques, interlaminar clamp fixation, transarticular fixation, screw-plate systems, screw-rod systems, and hook-screw systems, are reviewed and discussed. Recent advancements on the novel technique of atlantoaxial fixation are described. The combination of the C1 and C2 screws in screw-rod systems are described in detail.
Results:
All fixation techniques are useful. The screw-rod system appears to be the most popular approach. However, many novel or modified fixation methods have been introduced in recent years.
Conclusions:
Great advancements on posterior atlantoaxial fixation techniques have been made in the past decades. The wiring technique and interlaminar clamps technique have fallen out of favor because of the development of newer and superior fixation techniques. The C1-C2 transarticular screw technique may remain the gold standard for atlantoaxial fusion, whereas screw-rod systems, especially the C1 pedicle screw combined with C2 pedicle/pars screw fixation, have become the most popular fixation techniques. Hook-screw systems are alternatives for atlantoaxial fixation.
