Anterior cervical fixation is widely used as part of reconstructive procedures for selected cervical spine conditions requiring decompression, interbody reconstruction, and stabilization. In anterior cervical discectomy and fusion (ACDF), an interbody graft or cage is placed after neural decompression, while an anterior cervical plate and screws may be used to provide additional fixation across the treated segment or segments.
This article presents an imaging-based case review of anterior cervical plate fixation, focusing on preoperative imaging, surgical planning, implant positioning, postoperative radiographic assessment, and the role of an anterior cervical plate and screw system in cervical reconstruction.
The patient and clinical-team information shown in the original material has been omitted. The imaging used in this article is authorized for publication.
Clinical information: This article is intended for professional and educational purposes. Treatment decisions should be based on individual patient anatomy, diagnosis, imaging findings, surgical requirements, applicable device instructions for use, and clinical judgment.
Cervical Spine Assessment Before Anterior Fixation
Cervical Spine Assessment Before Anterior Fixation
Preoperative assessment is an essential part of cervical fusion planning.
Radiographic evaluation may include:
Standing or neutral cervical radiographs
Dynamic flexion-extension radiographs when clinically indicated
Computed tomography (CT)
Magnetic resonance imaging (MRI)
Three-dimensional CT reconstruction when required for surgical planning
These imaging modalities provide complementary information.
Radiographs
CT
CT provides detailed information regarding:
MRI
MRI
MRI is particularly useful for evaluating:
Signal changes within the spinal cord
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CT images of cervical OPLL
1. Sagittal plane
2. Transverse plane |
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MRI images of cervical OPLL
1. Sagittal plane
2. Transverse plane |
Preoperative Imaging and Surgical Planning
The imaging shown in the case demonstrates the importance of combining anatomical and neurological information when planning anterior cervical reconstruction.
The surgical strategy should be determined according to the affected levels, the location of neural compression, cervical alignment, bone quality, and the structural requirements of the reconstruction.
For anterior cervical reconstruction, the plate should be selected and positioned according to the number of treated levels and the patient's anatomy.
AO Surgery Reference emphasizes that plate length and positioning should be carefully considered to avoid unnecessary extension toward adjacent mobile disc spaces. Final plate position should also be assessed using appropriate AP and lateral imaging.
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MRI images of cervical spondylotic myelopathy
1. Sagittal view 2. Axial image at the level of the C5/6 disc space |
Principles of Anterior Cervical Decompression and Fusion
Anterior cervical discectomy and fusion is used to achieve neural decompression and stabilize the treated spinal segment.
Depending on the pathology and surgical plan, the procedure may involve:
Anterior exposure of the cervical spine
Confirmation of the operative level
Disc removal and/or anterior decompression
Removal of compressive osteophytes or other pathological structures when indicated
Preparation of the interbody space
Placement of an interbody cage or bone graft
Anterior cervical plate positioning
Screw insertion and locking
Final fluoroscopic or radiographic verification
The precise surgical procedure varies according to the diagnosis and reconstruction required.
Anterior plating is also used in selected cervical trauma and reconstruction procedures, where anterior fixation can support reconstruction of the anterior column.
Importance of Interbody Reconstruction
After adequate decompression, restoration of the intervertebral space is an important component of cervical reconstruction.
An interbody cage or graft may be used to:
Restore intervertebral height
Support the anterior column
Maintain the reconstructed segment
Provide a substrate for fusion
Contribute to restoration or maintenance of cervical alignment
The anterior plate functions as an additional stabilization component rather than as a substitute for an appropriately prepared fusion bed or properly positioned interbody implant.
Evidence regarding anterior plating shows that plate constructs can influence radiographic parameters such as graft collapse and cervical alignment, although outcomes vary according to surgical technique, pathology, construct design, and the number of treated levels.
Anterior Cervical Plate Positioning
Correct plate positioning is an important part of anterior cervical fixation.
The plate should be appropriately centered over the treated vertebral levels, while avoiding unnecessary extension toward adjacent mobile discs.
During fixation, the following factors should be considered:
Plate length
Plate orientation
Cervical lordosis
Vertebral body dimensions
Screw trajectory
Screw depth
Distance from adjacent disc spaces
Relationship between the plate and surrounding soft tissues
AO Surgery Reference recommends verifying plate position in both AP and lateral views. It also emphasizes avoiding unnecessary plate extension toward adjacent mobile disc spaces.
A retrospective study of single-level ACDF found that a plate-to-adjacent-disc distance greater than 5 mm was associated with a lower incidence of adjacent-level ossification development than shorter plate-to-disc distances. This does not establish that every case must use exactly the same measurement, but it highlights why plate positioning relative to adjacent discs matters.
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| Comparison of Frictional Forces Generated by Independent and En-bloc Anterior Translation of Vertebral Bodies in Multi-segment ACAF Techniques |
Screw Trajectory and Fixation
The screws are a critical component of the plate-screw construct.
Depending on the specific system, fixed-angle or variable-angle screws may be selected according to the surgical requirements.
Important considerations include:
The objective is to create a stable relationship between the plate, screws, vertebral bodies, and interbody reconstruction.
The final construct should be checked using appropriate intraoperative imaging.
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| Traction force and resistance in vertebral body anterior displacement |
Anterior Cervical Plate as Part of a Fusion Construct
An anterior cervical plate should be considered as one component of a larger reconstruction.
The final construct consists of:
Vertebral bodies
Interbody cage or graft
Anterior cervical plate
Fixation screws
Bone-healing and fusion process
The plate provides additional mechanical stabilization while the interbody reconstruction provides support within the disc space.
This distinction is important because the plate itself does not create biological fusion. Fusion depends on the interbody reconstruction, bone biology, mechanical environment, and patient-specific factors.
Postoperative Imaging Assessment
Postoperative imaging is important for evaluating the reconstructed cervical spine.
The assessment may include:
Plain Radiographs
Useful for evaluating:
CT
CT can provide more detailed assessment of:
MRI
MRI may be performed when clinically indicated to assess:
Conclusion
Anterior cervical plate fixation remains an important component of cervical reconstruction for appropriately selected patients undergoing anterior cervical fusion.
The key principles are not limited to the plate itself. Successful reconstruction requires a coordinated approach involving preoperative imaging, appropriate decompression, interbody reconstruction, accurate plate positioning, suitable screw selection, and postoperative follow-up.
The ATOM Anterior Cervical Plate – Type III is a titanium alloy anterior cervical plate and screw system designed for anterior internal fixation during cervical vertebral or interbody fusion. It incorporates multiple plate lengths, fixed-angle and variable-angle screw options, and a three-lobed locking mechanism to accommodate different anterior cervical fixation requirements.
The authorized imaging case presented here illustrates how preoperative CT/MRI assessment and postoperative radiographic evaluation can be incorporated into the discussion of anterior cervical plate fixation.
