Rat Spine Fusion Models for Preclinical Research: Opportunities and Challenges

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Rodent models have gained popularity for assessing the efficacy and safety of experimental spine fusion methods in preclinical research, but variability in surgical technique, graft materials, and outcome assessment has limited standardization across studies. This review highlights key developments in rat spinal fusion models, focusing on the strengths and limitations of the surgical techniques applied and advancements in quantitative and qualitative outcome measures, aiming to identify opportunities for increased consistency in experimental designs. A comprehensive literature review was performed by using PubMed to include studies utilizing rat models for spinal fusion. Posterolateral intertransverse fusion remains the most widely used model, often employing autografts or biologically enhanced scaffolds as controls, while the Wiltse paraspinal approach is chosen when minimal invasiveness is favored. Functional fusion outcome assessments have evolved from manual palpation and traditional radiography to sophisticated microcomputed tomography (μCT) analyses along with histological scoring and serum marker analyses. Consensus biomechanical analyses of rodent spine fusion outcomes remain lacking. Emerging rodent data on the effects of pharmacologic agents, systemic conditions, and biologic implants on fusion show wide-ranging fusion rates from 0% to 100% across studies. Overall, th

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

Browse all related research

Filter the research library by this study's title keywords, author, or publication year.