Comparison of bone reamer and trephine for foraminoplasty in percutaneous endoscopic lumbar discectomy based on 3D slicer and Digimizer software

Table 2 Differences in the volume of the SAP between the two groups pre- and postoperatively

Indicators	Group-R (n = 31)	Group-T (n = 32)	T value	P value
Preoperativ SAP zone volume (mm³)	1269. 62 ± 180.15	1354.48 ± 369.50	6.077	0.017
Postoperative SAP zone volume (mm³)	1096.40 ± 165.27	805.16 ± 284.97	4.440	0.037
Excision of the SAP zone volume (mm³)	173.22 ± 88.19	549.31 ± 231.43	17.507	0.001
Percentage of resection (%)	13.56 ± 6.57	40.83 ± 14.20	12.387	0.001

ISSN: 1749-799X