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Accuracy of pedicle screw insertion in posterior scoliosis surgery: a comparison between intraoperative navigation and preoperative navigation techniques

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Abstract

Purpose

This study was conducted to compare the efficacy and accuracy of intraoperative navigation (O-arm or Arcadis navigation) and preoperative CT-based navigation in adolescent idiopathic scoliosis (AIS) surgery.

Methods

Sixty-seven patients with scoliosis were grouped according to the method of navigation used in their fixation surgeries. A total of 492 pedicle screws were implanted in 27 patients using intraoperative navigation, and 626 screws were implanted in 40 patients using preoperative navigation. We analyzed the postoperative CT images for pedicle violations using the Gertzbein classification.

Results

There was no statistical difference in the accuracy of pedicle screw placement between two groups. However, in the apical region (the apex ± 2 vertebrae), the accuracy of safe pedicle screw placement (grades 0, 1) was significantly higher in the intraoperative navigation group than in the preoperative navigation group (94.8 vs 89.2%, respectively; P = 0.035). Intraoperative navigation significantly diminished medial perforation compared to preoperative navigation (P = 0.027), and the number of screws per vertebra that could be placed in the apical region was significantly higher in intraoperative navigation group (P < 0.001). In addition, the time required for the registration procedure and insertion of one pedicle screw was 11.3 ± 2.1 min in the preoperative group, but significantly decreased to 5.1 ± 1.1 min in the intraoperative group (P < 0.001).

Conclusions

Both preoperative CT-based and intraoperative navigation systems provide sufficient accuracy and safety in pedicle screw insertion for AIS surgery. Intraoperative navigation systems facilitate pedicle screw insertion in the apical region and reduce registration time during AIS surgery which improves the efficacy and accuracy of pedicle screw insertion.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan

    Wei Zhang, Tomoyuki Takigawa, Yoshihisa Sugimoto, Masato Tanaka & Toshifumi Ozaki

  2. Department of Orthopaedic Surgery, Bayannaoer City Hospital, Bayannaoer, Inner Mongolia, China

    Wei Zhang & YongGang Wu

Authors
  1. Wei Zhang
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  2. Tomoyuki Takigawa
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  3. YongGang Wu
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  4. Yoshihisa Sugimoto
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  5. Masato Tanaka
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  6. Toshifumi Ozaki
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Correspondence to Masato Tanaka.

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The authors declare that they have no conflicts of interest.

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Ethical approval was admitted by our hospital Ethics committee.

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Zhang, W., Takigawa, T., Wu, Y. et al. Accuracy of pedicle screw insertion in posterior scoliosis surgery: a comparison between intraoperative navigation and preoperative navigation techniques. Eur Spine J 26, 1756–1764 (2017). https://doi.org/10.1007/s00586-016-4930-5

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  • DOI: https://doi.org/10.1007/s00586-016-4930-5

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