Clin Surg | Volume 7, Issue 1 | Research Article | Open Access

Effection of Ratios of Autograft Area on Fusion Rate in TLIF

Sun Y, Shao L, Wu C, Liu X, Yao S, Ren S and Sun Y*

Department of Spine Surgery, China-Japan Union Hospital of Jilin University, China

*Correspondance to: Yunxin Sun 

Fulltext PDF


Objective: The overall goal of this research was to investigate different autograft area ratios in Transforaminal Lumbar Interbody Fusion (TLIF) and to evaluate the effects on the interbody fusion rate. Thus, to determine the optimal range of autologous bone graft area and the volume needed. Methods: A total of 57 patients were gathered in this retrospective study. According to the ratio (Sa/ Se) of the average autologous bone graft area (Sa) to the average endplate area (Se), patients were classified into three groups: Group A (Sa/Se) <19%, n=20), group B (19% ≤ Sa/Se ≤ 25%, n=19), and group C (Sa/Se >25%, n=18). Results: Our data demonstrated that the intervertebral space height increased after the operation in the three groups (all P<0.05). The final inter vertebral space was different between two groups (B and C) and group A. The fusion rate at six months showed significant changes between groups B and C and group A. The fusion rate at one-year showed no significant changes between 3 groups. The VAS and JOA scores improved markedly in all groups postoperatively. Conclusion: In our study, an autologous bone area ratio of more than 19% achieved a better fusion prognosis, but the increase in the fusion rate did not significantly improve when the average bone area ratio of the intervertebral space exceeded 25%. After further conversion of bone volume in the study, it was concluded that the required bone graft volume ranged from 2.9 ml to 4.3 ml.


Sun Y, Shao L, Wu C, Liu X, Yao S, Ren S, et al. Effection of Ratios of Autograft Area on Fusion Rate in TLIF. Clin Surg. 2022; 7: 3601.

Subscribe to Our Newsletter