A prospective randomized controlled trial comparing traditional trajectory pedicle screw versus cortical bone trajectory screw for degenerative spondylosis.

A prospective randomized controlled trial comparing traditional trajectory pedicle screw versus cortical bone trajectory screw for degenerative spondylosis. - A prospective randomized controlled trial comparing traditional trajectory pedicle screw versus cortical bone trajectory screw.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000010420

Enrollment

200

Registered

2013-04-08

Start date

2013-04-08

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

degenerative spondylosis

Interventions

traditional trajectory pedicle screw cortical bone trajectory screw

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1)Patients scheduled for posterior fusion surgery for degenerative spondylosis 2)Consent to the trial 3)20 years of age or over

Exclusion criteria

Exclusion criteria: 1)do not use Stryker Spine RADIUS spinal system 2)posterior fixation more than 3 levels 3)spinal tumor 4)pyogenic spondylitis 5)dialysis patients 6)spinal trauma 7)malignant tumors, dementia,bedridden patients 8)no consent to the trial 9)determination as contraindication by doctors

Design outcomes

Primary

Measure	Time frame
JOA score JOA-BPEQ VAS	—

Secondary

Measure	Time frame
rate of union rate of reduction change of bone mineral density	—

Countries

Japan

Contacts

Public ContactHiroshi Uei

Nihon University Itabashi Hospital Department of Orthopaedic Surgery

uei.hiroshi@nihon-u.ac.jp03-3972-8111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026