Unilateral transpedicular percutaneous vertebroplasty: initial experience

Radiology. 2002 Mar;222(3):737-41. doi: 10.1148/radiol.2223010718.


Purpose: To compare the radiographic and clinical outcomes of a unipediculate approach with those of standard bipediculate vertebroplasty.

Materials and methods: Retrospective review of percutaneous vertebroplasties yielded 18 vertebrae in 17 patients that were treated with a standard bipediculate approach and 57 vertebrae in 32 patients that were treated with a modified unipediculate approach. Anteroposterior radiographs obtained after the procedure were viewed to calculate the percentage of cement opacification in both vertebral halves, and mean values were compared between uni- and bipediculate approaches by using a two-tailed Student t test. Clinical outcomes, including pain relief and change in pain medication requirements, were compared in the two groups by using the chi(2) or Fisher exact test.

Results: With the unipediculate approach, filling across the midline was achieved in 55 (96%) of 57 injections. Mean opacification of vertebral body halves was 83% +/- 19 (SD) and 77% +/- 16 for the bipediculate and unipediculate approaches, respectively (P =.19). Among patients with available follow-up data, 16 (94%) of 17 patients who underwent the bipediculate procedure and 28 (88%) of 32 patients who underwent the unipediculate procedure achieved adequate pain relief (P =.65) with mean decreases in pain severity of 7.3 +/- 3.1 and 6.6 +/- 2.9, respectively.

Conclusion: Use of a unipediculate approach in percutaneous vertebroplasty allows filling of both vertebral halves from a single puncture site with no statistically significant difference in clinical outcome from that of bipediculate vertebroplasty.

MeSH terms

  • Aged
  • Back Pain / etiology
  • Bone Cements / adverse effects*
  • Cementation / methods
  • Female
  • Fluoroscopy
  • Fractures, Spontaneous / complications
  • Fractures, Spontaneous / diagnostic imaging
  • Fractures, Spontaneous / therapy*
  • Humans
  • Injections
  • Male
  • Pain Measurement
  • Polymethyl Methacrylate / administration & dosage*
  • Radiography, Interventional*
  • Retrospective Studies
  • Spinal Fractures / complications
  • Spinal Fractures / diagnostic imaging
  • Spinal Fractures / therapy*


  • Bone Cements
  • Polymethyl Methacrylate