Table 3.
Comparison of the intraoperative parameters between group A, treated using a porous polyoxymethylene thermoplastic regulator combined with a 3D printed template and group B, who underwent conventional percutaneous pedicle screw fixation (PPSF).
| Patient characteristics | Group A | Group B | Statistic | P-value |
|---|---|---|---|---|
| Number of pedicles successful pierced at first attempt (n=80) | 10 | 3 | χ2=4.103 | P=0.043 <0.05 |
| Number of insertions before reaching the desired position (n) | 7.83±1.47 | 17.50±1.87 | t=−9.947 | P<0.01 |
| Radiation dosage before reaching the desired position (mSv) | 0.45±0.10 | 1.35±1.38 | t=−12.728 | P<0.01 |
| Operation time before reaching the desired position (min) | 15.17±2.64 | 29.50±2.43 | t=−9.788 | P<0.01 |
| Total radiation dosage of fluoroscopy (mSv) | 2.75±0.48 | 4.82±0.75 | t=−5.715 | P<0.01 |
| Total operation time (min) | 66.67±6.80 | 95.50±7.18 | t=−7.143 | P<0.01 |
| Intraoperative blood loss (ml) | 86.50±5.32 | 127.33±5.05 | t=−13.641 | P<0.01 |