The Use of Spiral Cement Injector for Percutaneous Vertebroplasty to Treat Kummell Disease: A Retrospective Study

Background Percutaneous vertebroplasty (PVP) is a common method used to treat Kummell disease. In patients without neurologic symptoms, we sought to evaluate whether using the new spiral injectors instead of the traditional push-rod injectors in PVP can result in improved clinical efficacy for the treatment of Kummell disease. Methods A clinical retrospective study was conducted between August 2018 and December 2020. The study included patients diagnosed with single-level thoracolumbar Kummell disease who underwent PVP surgery. The patients were divided into 2 groups: an observation group consisting of 53 patients treated with spiral injectors and a control group consisting of 68 patients treated with push-rod injectors. Results A 2-year follow-up period was adopted. The bone cement injection volume and occurrence of bone cement leakage were significantly greater in the observation group compared with the control group (P < 0.05). The observation group had significantly shorter operation time and intraoperative fluoroscopy times compared with the control group (P < 0.05). The scores for the visual analog scale and Oswestry Disability Index in both groups were significantly lower at 3 days or 3 months and 2 years after surgery compared with before surgery, with the scores at 2 years after surgery being significantly lower than those at 3 days or 3 months for both groups (P < 0.05). The relative anterior ledge height and Cobb angle showed significant improvement at 3 days and 2 years after surgery compared with before surgery in both groups (P < 0.05), but patients in the observation group experienced substantial improvement at 3 days and 2 years after surgery compared with those in the control group (P < 0.05). In both groups, the relative anterior ledge height was noticeably lower 2 years after surgery compared with 3 days after surgery (P < 0.05). Concurrently, there was a significant increase in the local Cobb angle over time in both groups (P < 0.05). Conclusions The implementation of both spiral injectors and traditional push-rod injectors in PVP surgery yields effective pain relief, improved function, partially restored vertebral height, and corrected kyphosis in treating Kummell disease. Compared with the push-rod injector, the spiral injector is highly efficient in restoring vertebral height, correcting kyphosis, and minimizing fluoroscopy use and operation time, but it carries a greater risk of bone cement leakage.