title: Use of Piezosurgery for removal of retrovertebral body osteophytes in anterior cervical discectomy.
abstract: BACKGROUND
  The relatively new technique of Piezosurgery is based on microvibrations, generated by the piezoelectrical effect, which results in selective bone cutting with preservation of adjacent soft tissue.
  
  
  OBJECTIVE
  To study the applicability of Piezosurgery in anterior cervical discectomy with fusion (ACDF) surgery.
  
  
  METHODS
  Prospective clinical study at the neurosurgical department of the University of Freiburg, Germany.
  
  
  METHODS
  Nine patients with cervical disc herniation and retrovertebral osteophytes who underwent ACDF surgery.
  
  
  METHODS
  Piezosurgery was evaluated with respect to practicability, safety, preciseness of bone cutting, and preservation of adjacent neurovascular tissue. Pre- and postoperative clinical and radiological data were assessed.
  
  
  METHODS
  Piezosurgery was supportively used in ACDF in nine patients with either radiculopathy or myelopathy from disc herniation or ventral osteophytes. After discectomy, osteophytes were removed with Piezosurgery to decompress the spinal canal and the foramina. Angled inserts were used, allowing for cutting even retrovertebral osteophytes.
  
  
  RESULTS
  In all nine cases, Piezosurgery cut bone selectively with no damage to nerve roots, dura, or posterior longitudinal ligament. None of the patients experienced any new neurological deficit after the operation. The handling of the instrument was safe and the cut precise. Osteophytic spurs, even retrovertebral ones that generally only can be approached via corpectomies, could be safely removed because of the angled inserts through the disc space. Currently, a slightly prolonged operation time was observed for Piezosurgery. Furthermore, the design of the handpiece could be further improved to facilitate the intraoperative handling in ACDF.
  
  
  CONCLUSIONS
  Piezosurgery proved to be a useful and safe technique for selective bone cutting and removal of osteophytes with preservation of neuronal and soft tissue in ACDF. In particular, the angled inserts were effective in cutting bone spurs behind the adjacent vertebra which cannot be reached with conventional rotating burs.
authors: Department of Neurosurgery, Albert-Ludwigs-University, Breisacherstr. 64, 79106 Freiburg, Germany. Electronic address: juergen.grauvogel@uniklinik-freiburg.de.
authors: Juergen
authors: J
authors: Grauvogel
authors: Department of Neurosurgery, Albert-Ludwigs-University, Breisacherstr. 64, 79106 Freiburg, Germany.
authors: Christian
authors: C
authors: Scheiwe
authors: Department of Neurosurgery, Sankt Gertrauden Hospital, Paretzer Straße 12, 10713 Berlin, Germany.
authors: Jan
authors: J
authors: Kaminsky
mesh_terms: D000328:Adult; D000368:Aged; D002574:Cervical Vertebrae / Q000601:surgery*; D019299:Decompression, Surgical / Q000379:methods; D017586:Diskectomy / Q000379:methods*; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000150:complications / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D054850:Osteophyte / Q000150:complications / Q000601:surgery*; D059745:Piezosurgery / Q000379:methods*; D011446:Prospective Studies; D013123:Spinal Fusion / Q000379:methods*; D016896:Treatment Outcome
keywords: Anterior cervical discectomy; Bone cutting; Cervical disc herniation; Cervical spondylosis; Piezosurgery