Scientific abstracts

The latest abstracts available on PIEZOSURGERY®

Piezoelectric Surgery for Dorsal Spine: A technical note.

Franzini, Legnani, Beretta, Prada, DiMeco, Visintini, Franzini.

World Neurosurg. 2018 Mar 9. pii: S1878-8750(18)30496-0. doi: 10.1016/j.wneu.2018.03.026. [Epub ahead of print]

Abstract

BACKGROUND: Laminoplasty and laminectomy are two common surgical procedures utilized in approaching degenerative and neoplastic disease of the spinal canal. Routinely adopted instruments, such as Kerrison rongeur or high-speed drill (HSD), entail some potentially serious complications such as dura injuring and thermal and mechanical damage to neurovascular structures. We have adopted piezoelectric bone surgery, which permits a selective cut of mineralized tissues, to perform posterior procedures on the thoracic spine, where the relationship between bone and the spinal cord are critical.

OBJECTIVE: To evaluate the use of piezoelectric surgery for performing dorsal spine laminectomy and laminoplasty.

METHODS: Mectron piezosurgery device is an instrument developed for cutting bone with microvibrations that are created by the piezoelectric effect. This instrument allows a safe and precise bone cut, and it is characterized by no heat generation, thus avoiding thermal injury to bone and soft tissues. We have adopted this device to perform eight laminoplasty for tumors of the dorsal spine and two laminectomies for thoracic spinal stenosis, for a total of ten patients.

RESULTS: Across all surgeries there were no procedure-related intraoperative complications, such as dura injuring or damage to neural structures.CONCLUSION:The piezoelectric device showed excellent results in terms of safety and precise bone cutting properties when performing posterior surgical procedures in the dorsal spine, where thermal injury produced by the conventionally used drill may damage the spinal cord, closer to bony elements.

KEYWORDS: Dorsal spine; Laminectomy; Laminoplasty; Mectron; Piezoelectric surgery; Thoracic spinal stenosis

Copyright © 2018 Elsevier Inc. All rights reserved.

Structural and ultrastructural analyses of bone regeneration in rabbit cranial osteotomy: Piezosurgery versus traditional osteotomes.

Anesi A, Ferretti M, Cavani F, Salvatori R, Bianchi M, Russo A, Chiarini L, Palumbo C.

J Craniomaxillofac Surg. 2017 Oct 12. pii: S1010-5182(17)30343-8. doi: 10.1016/j.jcms.2017.10.004. [Epub ahead of print]

Abstract

Clinical advantages of piezosurgery have been already proved. However, few investigations have focused on the dynamics of bone healing. The aim of this study was to evaluate, in adult rabbits, bone regeneration after cranial linear osteotomies with two piezoelectrical devices (Piezosurgery® Medical - PM and Piezosurgery® Plus - PP), comparing them with conventional rotary osteotomes (RO). PP was characterized by an output power three times higher than PM. Fifteen days after surgery, histomorphometric analyses showed that the osteotomy gap produced with PM and PP was about half the size of that produced by RO, and in a more advanced stage of recovery. Values of regenerated bone area with respect to the total osteotomy area were about double in PM and PP samples compared with RO ones, while the number of TRAP-positive (tartrate-resistant acid phosphatase positive) osteoclasts per linear surface showed a significant increase, suggesting greater bone remodelling. Under scanning electron microscopy, regenerated bone displayed higher cell density and less mineralized matrix compared with pre-existent bone for all devices used. Nanoindentation tests showed no changes in elastic modulus. In conclusion, PM/PP osteotomies can be considered equivalent to each other, and result in more rapid healing compared with those using RO.

KEYWORDS: Bone regeneration; Cranial osteotomy; Elastic modulus; Nanoindentation; Piezosurgery