# Comparison of Standard Fusion With "Topping Off"-System in Lumbar Spine

> **NCT01224379** · NA · UNKNOWN · sponsor: **University of Cologne** · enrollment: 30 (estimated)

## Conditions studied

- Spondylolisthesis
- Erosive Osteochondrosis in L2-S1

## Interventions

- **DEVICE:** Topping off system
- **DEVICE:** monosegmental PLIF

## Key facts

- **NCT ID:** NCT01224379
- **Lead sponsor:** University of Cologne
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2011-01
- **Primary completion:** 2012-07
- **Final completion:** 2012-10
- **Target enrollment:** 30 (ESTIMATED)
- **Last updated:** 2010-10-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01224379

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01224379, "Comparison of Standard Fusion With "Topping Off"-System in Lumbar Spine". Retrieved via AI Analytics 2026-06-14 from https://api.ai-analytics.org/clinical/NCT01224379. Licensed CC0.

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