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Table 1: 
Patients undergoing vertebroplasty at thoracolumbar junction with and without vacuum clefts
GroupNo of PatientsAge (yrs)Sex (F/M, no.)Cement (mL)Intradiskal Leak(u disk*:l disk†)Initial Wedge Angle (°)‡Wedge Angle Change§Improved Percentage of Height
I1471.611/33.83:115.31.29.0
II3977.731/85.36:214.56.348.3
P value.01.006.42<.001.001
  • Note:—F indicates female; M, male; u, upper; l, lower.
  • * Cement leakage into the upper disk.
  • † Cement leakage into the lower disk.
  • ‡ Wedge angle of the collapsed body before vertebroplasty.
  • § (Wedge angle change) before − (wedge angle) after vertebroplasty.
  •  [(H/HN) post − (H/HN)pre]/(H/HN) pre.