Research ArticleCervical Spine

Characteristics of Screw Perforation and Screw Loosening in Atlantoaxial Transarticular Fixation Using a Preoperative Computed Tomography-Based Navigation System

Masashi Uehara, Shota Ikegami, Hiroki Oba, Yoshinari Miyaoka, Takayuki Kamanaka, Terue Hatakenaka, Takuma Fukuzawa, Koji Hayashi and Jun Takahashi
International Journal of Spine Surgery October 2024, 18 (5) 477-481; DOI: https://doi.org/10.14444/8604

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Tables

  • Table 1

    Perforation rates by direction (N = 60).

    GradePerforation Rate, %Perforation Direction, n
    LateralMedialCranialCaudal
    1 or 2 or 313.0%8321
    2 or 34.6%1121
    30.9%1000
  • Table 2

    Effects of patient-related factors on screw loosening.

    FactorUnivariateMultivariate
    OR (95% CI) P OR (95% CI) P
    Age (+1 y)0.99 (0.95–1.03)0.75-
    Gender (women)0.67 (0.16–2.73)0.58-
    Rheumatoid arthritis4.11e-08 (0.00–inf)0.99-
    Screw perforation (Grade 2 or 3)1.78e-07 (0.00–inf)0.99-
    Unilateral insertion8.50 (1.53–47.2)0.0148.25 (1.49–45.8)0.015

    • Abbreviation: inf, infinity.

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Characteristics of Screw Perforation and Screw Loosening in Atlantoaxial Transarticular Fixation Using a Preoperative Computed Tomography-Based Navigation System
Masashi Uehara, Shota Ikegami, Hiroki Oba, Yoshinari Miyaoka, Takayuki Kamanaka, Terue Hatakenaka, Takuma Fukuzawa, Koji Hayashi, Jun Takahashi
International Journal of Spine Surgery Oct 2024, 18 (5) 477-481; DOI: 10.14444/8604
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