Cargando…

Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine

Study Design Retrospective case series. Objective StaXx XD (Spine Wave, Inc., Shelton, CT, United States) is an expandable polyaryl-ether-ether-ketone (PEEK) wafer implant utilized in the treatment of lumbar degenerative disease. PEEK implants have been successfully used as interbody devices. Few st...

Descripción completa

Detalles Bibliográficos
Autores principales: Alimi, Marjan, Shin, Benjamin, Macielak, Michael, Hofstetter, Christoph P., Njoku, Innocent, Tsiouris, Apostolos J., Elowitz, Eric, Härtl, Roger
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Georg Thieme Verlag KG 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4472284/
https://www.ncbi.nlm.nih.gov/pubmed/26131383
http://dx.doi.org/10.1055/s-0035-1552988
_version_ 1782377037912080384
author Alimi, Marjan
Shin, Benjamin
Macielak, Michael
Hofstetter, Christoph P.
Njoku, Innocent
Tsiouris, Apostolos J.
Elowitz, Eric
Härtl, Roger
author_facet Alimi, Marjan
Shin, Benjamin
Macielak, Michael
Hofstetter, Christoph P.
Njoku, Innocent
Tsiouris, Apostolos J.
Elowitz, Eric
Härtl, Roger
author_sort Alimi, Marjan
collection PubMed
description Study Design Retrospective case series. Objective StaXx XD (Spine Wave, Inc., Shelton, CT, United States) is an expandable polyaryl-ether-ether-ketone (PEEK) wafer implant utilized in the treatment of lumbar degenerative disease. PEEK implants have been successfully used as interbody devices. Few studies have focused on expandable PEEK devices. The aim of the current study is to determine the radiographic and clinical outcome of expandable PEEK cages utilized for transforaminal lumbar interbody fusion in patients with lumbar degenerative diseases. Methods Forty-nine patients who underwent lumbar interbody fusion with implantation of expandable PEEK cages and posterior instrumentation were included. The clinical outcome was evaluated using the visual analog scale (VAS) and the Oswestry Disability Index (ODI). Radiographic parameters including disk height, foraminal height, listhesis, local disk angle of the index level/levels, regional lumbar lordosis, and graft subsidence were measured preoperatively, postoperatively, and at latest follow-up. Results At an average follow-up of 19.3 months, the minimum clinically important difference for the ODI and VAS back, buttock, and leg were achieved in 64, 52, 58, and 52% of the patients, respectively. There was statistically significant improvement in VAS back (6.42 versus 3.11, p < 0.001), VAS buttock (4.66 versus 1.97, p = 0.002), VAS leg (4.55 versus 1.96, p < 0.001), and ODI (21.7 versus 12.1, p < 0.001) scores. There was a significant increase in the average disk height (6.49 versus 8.18 mm, p = 0.037) and foraminal height (15.6 versus 18.53 mm, p = 0.0001), and a significant reduction in the listhesis (5.13 versus 3.15 mm, p = 0.005). The subsidence of 0.66 mm (7.4%) observed at the latest follow-up was not significant (p = 0.35). Conclusions Midterm results indicate that expandable PEEK spacers can effectively and durably restore disk and foraminal height and improve the outcome without significant subsidence.
format Online
Article
Text
id pubmed-4472284
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Georg Thieme Verlag KG
record_format MEDLINE/PubMed
spelling pubmed-44722842015-06-30 Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine Alimi, Marjan Shin, Benjamin Macielak, Michael Hofstetter, Christoph P. Njoku, Innocent Tsiouris, Apostolos J. Elowitz, Eric Härtl, Roger Global Spine J Article Study Design Retrospective case series. Objective StaXx XD (Spine Wave, Inc., Shelton, CT, United States) is an expandable polyaryl-ether-ether-ketone (PEEK) wafer implant utilized in the treatment of lumbar degenerative disease. PEEK implants have been successfully used as interbody devices. Few studies have focused on expandable PEEK devices. The aim of the current study is to determine the radiographic and clinical outcome of expandable PEEK cages utilized for transforaminal lumbar interbody fusion in patients with lumbar degenerative diseases. Methods Forty-nine patients who underwent lumbar interbody fusion with implantation of expandable PEEK cages and posterior instrumentation were included. The clinical outcome was evaluated using the visual analog scale (VAS) and the Oswestry Disability Index (ODI). Radiographic parameters including disk height, foraminal height, listhesis, local disk angle of the index level/levels, regional lumbar lordosis, and graft subsidence were measured preoperatively, postoperatively, and at latest follow-up. Results At an average follow-up of 19.3 months, the minimum clinically important difference for the ODI and VAS back, buttock, and leg were achieved in 64, 52, 58, and 52% of the patients, respectively. There was statistically significant improvement in VAS back (6.42 versus 3.11, p < 0.001), VAS buttock (4.66 versus 1.97, p = 0.002), VAS leg (4.55 versus 1.96, p < 0.001), and ODI (21.7 versus 12.1, p < 0.001) scores. There was a significant increase in the average disk height (6.49 versus 8.18 mm, p = 0.037) and foraminal height (15.6 versus 18.53 mm, p = 0.0001), and a significant reduction in the listhesis (5.13 versus 3.15 mm, p = 0.005). The subsidence of 0.66 mm (7.4%) observed at the latest follow-up was not significant (p = 0.35). Conclusions Midterm results indicate that expandable PEEK spacers can effectively and durably restore disk and foraminal height and improve the outcome without significant subsidence. Georg Thieme Verlag KG 2015-06 /pmc/articles/PMC4472284/ /pubmed/26131383 http://dx.doi.org/10.1055/s-0035-1552988 Text en © Thieme Medical Publishers
spellingShingle Article
Alimi, Marjan
Shin, Benjamin
Macielak, Michael
Hofstetter, Christoph P.
Njoku, Innocent
Tsiouris, Apostolos J.
Elowitz, Eric
Härtl, Roger
Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine
title Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine
title_full Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine
title_fullStr Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine
title_full_unstemmed Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine
title_short Expandable Polyaryl-Ether-Ether-Ketone Spacers for Interbody Distraction in the Lumbar Spine
title_sort expandable polyaryl-ether-ether-ketone spacers for interbody distraction in the lumbar spine
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4472284/
https://www.ncbi.nlm.nih.gov/pubmed/26131383
http://dx.doi.org/10.1055/s-0035-1552988
work_keys_str_mv AT alimimarjan expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT shinbenjamin expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT macielakmichael expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT hofstetterchristophp expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT njokuinnocent expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT tsiourisapostolosj expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT elowitzeric expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine
AT hartlroger expandablepolyaryletheretherketonespacersforinterbodydistractioninthelumbarspine