Related Experiment Video
Updated: Jun 4, 2026
05:49
Reliability of Artificial Intelligence-Based Cone Beam Computed Tomography Integration with Digital Dental Images
Published on: February 23, 2024
Relation between alignments of upper and subaxial cervical spine: a radiological study
Qunfeng Guo1, Bin Ni, Jian Yang
1Department of Orthopedics, Changzheng Hospital, The Second Military Medical University, 415 Fengyang Road, Huangpu District, Shanghai 200003, People's Republic of China.
Archives of Orthopaedic and Trauma Surgery
|January 29, 2011
Summary
This study found that the C1-C2 fixation angle is crucial for subaxial alignment after atlantoaxial fusion. An optimal fusion angle between 25° and 30° is recommended for better surgical outcomes.
Area of Science:
- Orthopedics
- Radiology
- Spine Surgery
Background:
- Cervical spine alignment is critical for function.
- Understanding relationships between upper and subaxial cervical spine angles is important for surgical planning.
Purpose of the Study:
- To investigate the relationship between upper and subaxial cervical spine alignments.
- To determine the optimal atlantoaxial fusion angle using radiological data.
Main Methods:
- Radiological assessment of 414 asymptomatic volunteers (213 males, 201 females).
- Measurement of Occiput-C2 (Oc-C2), C1-C2, and C2-C7 angles in neutral position.
- Analysis of correlations between these angles and with age.
Main Results:
- Significant correlations were found between Oc-C2, C1-C2, and C2-C7 angles, as well as with age.
- The correlation between C1-C2 and C2-C7 angles was stronger than between Oc-C2 and C2-C7 angles.
- Differences in angles were noted between males and females.
Conclusions:
- The C1-C2 angle strongly influences subaxial alignment post-atlantoaxial fusion.
- An optimal atlantoaxial fusion angle is suggested to be between 25° and 30° for improved postoperative outcomes.
Related Concept Videos
01:28Articulations of the Vertebral Column
In addition to being held together by the intervertebral discs, adjacent vertebrae also articulate with each other at synovial joints formed between the superior and inferior articular processes called zygapophysial joints (facet joints). These are plane joints that provide for only limited motions between the vertebrae. The orientation of the articular processes at these joints varies in different regions of the vertebral column and serves to determine the types of motions available in each...
01:16Vertebral Column: Regions and Curvature
The vertebral column or spine is a flexible column that supports the head, neck, and body and allows for their movements. It also protects the spinal cord.
Regions of the Vertebral Column
In an adult, the spine is subdivided into five regions: the cervical, the thoracic, the lumbar, the sacral, and the coccygeal region. The spine initially develops as a series of 33 vertebrae; after 20 years of age, the nine bones in the sacral region, five sacral, and four coccygeal bones fuse to form the...
Regions of the Vertebral Column
In an adult, the spine is subdivided into five regions: the cervical, the thoracic, the lumbar, the sacral, and the coccygeal region. The spine initially develops as a series of 33 vertebrae; after 20 years of age, the nine bones in the sacral region, five sacral, and four coccygeal bones fuse to form the...
01:09Overview of the Axial Skeleton
The skeleton is subdivided into two major divisions—the axial skeleton and the appendicular skeleton. The axial skeleton forms the vertical, central axis of the body. It includes all of the bones of the head, neck, chest, and back. It protects the brain, spinal cord, heart, and lungs. It also serves as the attachment site for muscles that move the head, neck, and back and for muscles that act across the shoulder and hip joints to move their corresponding limbs.
The axial skeleton of the adult...
The axial skeleton of the adult...
01:16Spinal Cord: Cross-sectional Anatomy
The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
Gray Matter and its Components
Central to the gray matter is...
Gray Matter and its Components
Central to the gray matter is...
01:14Cranial Bones: Superior and Posterior View
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...