NCT00762723

Clinical Outcomes of the Trinica(R) Anterior Lumbar Plate: Fixed Screws vs. Variable Screws

A Comparison of Clinical Outcomes Comparing Fixed-angle, Variable-angle, and Hybrid Screw Configuration for the Trinica(R) Anterior Lumbar Plate System

• Status: Terminated
• Phase: N/A
• Study type: Interventional
• Enrollment: 19 (actual)
• Sponsor: Zimmer Biomet · Industry
• Sex: All
• Age: —
• Healthy volunteers: Not accepted

Summary

Trinica Anterior Lumbar Plate (ALP) System is a commercially available, supplemental fusion device for use in the lumbar or sacral spine (L1-S1) to treat instability. The system provides the surgeon with the ability to supplement an interbody device with anterior plate fixation. The device's bone-plate interface is enhanced through use of fixed-angled screws,variable-angle screws or a combination of both to accommodate various combinations of screw configurations, resulting in enhanced fixation tailored to individual patient needs. Clinical outcomes data, including a comparison of different screw configurations, is needed to support the use and of the Trinica ALP System.

Detailed description

In the cervical spine, literature shows that a static plate utilizing fixed screws loses its ability to load share and to limit motion following subsidence of the interbody spacer. In contrast, a dynamic plate system utilizing variable-angle screws maintains load-sharing and stiffness following subsidences. Increasing the load on the bone graft in the interbody space increases the rate of graft fusion. Although literature exists supporting the in vivo use of anterior cervical plate systems and the advantages of screw angulation, there is no data evaluating and supporting the use of anterior plate systems in the lumbar spine. The different biomechanical loads between cervical and lumbar spine suggest cervical data may not generalize to the lumbar spine. Additionally, it will be useful to characterize the effect of different screw configurations on subsidence and stress shielding and fusion success. The proposed study will not only assess clinical outcomes following Trinica ALP implantation, but will also provide valuable comparison data regarding two different screw configurations. The study is a prospective, randomized, between groups design. The subject pool will be comprised of individuals who are appropriate for spinal fusion surgery, and who meet the inclusion criteria. Subjects will be randomly assigned to one of three screw configurations. All subjects will receive structural allograft (Puros A Anterior Allograft) as interbody support. Other procedures identified by the surgeon to be in the best interest of the patient may be completed but are not required by the protocol.

Conditions

• Degenerative Disc Disease
• Spinal Stenosis
• Spondylolisthesis

Interventions

Type	Name	Description
DEVICE	Trinica Anterior Lumbar Plate System	Trinica Anterior Lumbar Plate System accommodates the use of either fixed- or variable-angle screws. This study is a comparison of clinical outcomes from anterior lumbar interbody fusion patients receiving the Trinica Anterior Lumbar Plate system with either all fixed-angle screws, variable-angle screws, or a hybrid configuration.

Timeline

• Start date: 2008-02-01
• Primary completion: 2012-09-01
• Completion: 2012-09-01
• First posted: 2008-09-30
• Last updated: 2014-04-17
• Results posted: 2014-03-26

Locations

3 sites across 1 country: United States