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Clinical application of C1 pedicle screw and lateral mass screw for atlantoaxial instability patients with C1 posterior arches measuring>4 mm:a prospective, double-blind, randomized controlled trial

Clinical application of C1 pedicle screw and lateral mass screw for atlantoaxial instability patients with C1 posterior arches measuring>4 mm:a prospective, double-blind, randomized controlled trial

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR-IOR-15006748
Enrollment
Unknown
Registered
2015-07-14
Start date
2011-05-01
Completion date
Unknown
Last updated
2017-04-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

atlantoaxial diseases

Interventions

Two groups:C1 lateral mass screw versus lateral mass screw

Sponsors

Hong Hui Hospital, Xi'an Jiaotong University College of Medicine
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 90 Years

Inclusion criteria

Inclusion criteria: 1. atlantoaxial instability; 2. reducible dislocation caused by odontoid fracture, transverse atlas ligament injury, odontoid hypoplasia, and rheumatoid arthritis.

Exclusion criteria

Exclusion criteria: 1. Lateral mass of atlas tumors, burst fracture; 2. irreducible atlantoaxial dislocation; 3. burst fracture of axis; 4. the height of C1 posterior arch under the vertebral artery groove<=4mm; 5. severe osteoporosis.

Design outcomes

Primary

MeasureTime frame
complications;—

Countries

China

Contacts

Public ContactBaorong He
hebr888@163.com+86 13700241328

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Mar 13, 2026