Chinese Journal of Tissue Engineering Research ›› 2018, Vol. 22 ›› Issue (7): 1044-1049.doi: 10.3969/j.issn.2095-4344.0115

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Polyaxial pedicle screw via minimally invasive intermuscular space approach in treatment of lumbar spondylolisthesis: short-term efficacy and safety  

Xu Jia-xin   

  1. Third Hospital, Hebei Medical University, Shijiazhuang 050000, Hebei Province, China
  • Online:2018-03-08 Published:2018-03-08
  • About author:Xu Jia-xin, M.D., Attending physician, Third Hospital, Hebei Medical University, Shijiazhuang 050000, Hebei Province, China
  • Supported by:

    the Key Project Plan of Medical Science of Hebei Province in 2016, No. 20160609

Abstract:

BACKGROUND: Traditional posterior lumbar interbody fusion has been proven to be effective for the treatment of lumbar spondylolisthesis. The traditional surgery has a high requirement for internal fixation instruments, and it is difficult to popularize, and it has the disadvantage of serious injury to back muscles.

OBJECTIVE: To investigate the short-term efficacy and safety of polyaxial pedicle screw via minimally invasive intermuscular space approach in treatment of lumbar spondylolisthesis.
METHODS: Totally 96 patients with lumbar spondylolisthesis received diagnosis and surgery in Third Hospital, Hebei Medical University from August 2015 to August 2016. They were divided into traditional surgery group and minimally invasive polyaxial pedicle screw group by random number table, with 48 cases in each group. Traditional surgery group received midline incision pedicle screw insertion through traditional lumbar posterior approach. Minimally invasive polyaxial pedicle screw group received minimally invasive polyaxial pedicle screw insertion through bilateral posterior lumbar intermuscular approach. Operation time and intraoperative blood loss were compared between the two groups. At 6 months after follow-up, Visual Analogue Scale scores and Oswestry Disability Index were recorded before surgery, 1 and 3 days, 2 weeks, 1, 3 and 6 months after surgery between the two groups. The reduction rate of spondylolisthesis, fusion rate, and incidence of complications after surgery were analyzed 1, 3 and 6 months after surgery.
RESULTS AND CONCLUSION: (1) The perioperative indexes in minimally invasive polyaxial pedicle screw group were significantly better than those in traditional surgery group (P < 0.05). (2) Visual Analogue Scale scores and Oswestry Disability Index were significantly lower in the minimally invasive polyaxial pedicle screw group than those in traditional surgery group at 3 days, 2 weeks, 1, 3 and 6 months after surgery (P < 0.05). (3) The reduction rate and the fusion rate were significantly higher in the spondylolisthesis in minimally invasive polyaxial pedicle screw group than those in traditional surgery group at 1, 3 and 6 months after surgery (P < 0.05). (4) The incidence was significantly lower in the minimally invasive polyaxial pedicle screw group than in the traditional surgery group (4% versus 17%; P < 0.05). (5) Results indicated that polyaxial pedicle screw via minimally invasive intermuscular space approach in treatment of lumbar spondylolisthesis is safe and reasonable, which can improve perioperative indexes, reduce lumbar disability and relieve patients’ pain.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Lumbar Vertebrae, Spondylolysis, Bone Nails, Tissue Engineering

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