Table 3. Radiographic outcomes of the two groups.
| Preoperative | Postoperative | P | |
|---|---|---|---|
| Disc height of stabilized segment (mm) | |||
| Dynesys group | 12.0±2.1 | 12.6±1.9* | 0.15 |
| PLIF group | 12.5±2.3 | 14.1±1.7* | 0.01† |
| Disc height of the upper adjacent segment (mm) | |||
| Dynesys group | 12.3±1.6 | 11.8±1.7 | 0.14 |
| PLIF group | 12.9±1.9 | 12.3±1.8 | 0.10 |
| ROM of stabilized segment (°) | |||
| Dynesys group | 7.1±2.2 | 4.9±2.2* | <0.001† |
| Single level | 7.0±2.3 | 4.8±2.3* | <0.01† |
| Multiple levels | 7.4±2.1 | 5.1±2.1* | <0.01† |
| PLIF group | 7.3±2.3 | 0* | <0.001† |
| Single level | 7.1±2.4 | 0* | <0.01† |
| Multiple levels | 7.5±2.1 | 0* | <0.01† |
| ROM of the upper adjacent segment (°) | |||
| Dynesys group | 8.3±2.9 | 10.1±2.7* | 0.002† |
| PLIF group | 8.5±2.1 | 13.1±3.1* | <0.001† |
Values are presented as the mean±standard deviation.
PLIF, posterior lumbar interbody fusion; ROM, range of motion.
*Significant difference between the Dynesys and PLIF groups using the Mann-Whitney U test, P < 0.05.
†Significant difference between pre- and postoperative condition in each group using the Wilcoxon matched-pairs signed-ranks test., P < 0.05.