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Device for intervertebral assisted motion

Chen-Sheng Chen, Shih-Liang Shih
Interspinous spacers used stand-alone preserve joint movement but provide little protection for diseased segments of the spine. Used as adjuncts with fusion, interspinous spacers offer rigid stability but may accelerate degeneration on adjacent levels. Our new device is intended to balance the stability and preserves motion provided by the implant. A new interspinous spacer was devised according to the results of topology optimization studies. Four finite element (FE) spine models were created that consisted of an intact spine without an implant, implantation of the novel, the device for intervertebral assisted motion (DIAM system), and the Dynesys system...
January 6, 2018: Medical & Biological Engineering & Computing
Rebecca J Crawford, Quentin J Malone, Roger I Price
BACKGROUND: Interspinous spacer/implants like the Device for Intervertebral Assisted Motion (DIAM™) are controversially yet commonly used in the surgical treatment of lumbar degenerative pathologies. Criticism is based on ill-defined indications, lack of superiority over decompression, and a poorly understood mechanical effect. Yet, continued use by surgeons implies their perceived clinical merit. We examined radiographic spinal alignment for 12 months, and pain and function for 24 months, after DIAM-augmented surgery to improve the understanding of the mechanical effect relating to clinical outcomes in patients...
2017: Scoliosis and Spinal Disorders
Jun-Yeong Seo, Kee-Yong Ha, Young-Hoon Kim, Joo-Hyun Ahn
The device for intervertebral assisted motion (DIAM) is a dynamic implant that consists of a silicone bumper enveloped by a polyethylene terephthalate (PET) fiber sack. Silicone and PET were used because of their biological inertness, but repetitive motion of the spine can cause wear on the implant nonetheless. The purpose of this study is to report a case of foreign body reaction (FBR) against a DIAM. A 72-year-old female patient presented with lower back pain and both legs radiating pain. She had undergone DIAM implantation at L4-5 for spinal stenosis 5 years previously...
November 2016: Journal of Korean Neurosurgical Society
Kang Lu, Po-Chou Liliang, Hao-Kuang Wang, Jui-Sheng Chen, Te-Yuan Chen, Ruyi Huang, Han-Jung Chen
BACKGROUND/OBJECTIVE: Internal disk disruption (IDD), an early event of lumbar disk degeneration, is the most common cause of low back pain. Since increased intradiskal pressure (IDP) is associated with symptoms and progression of disk degeneration, unloading a painful disk with an interspinous process device (IPD) is a rational treatment option. The goal of this study was to evaluate the effectiveness of dynamic stabilization with an IPD in the treatment of symptomatic IDD of the lumbar spine...
2016: Journal of Pain Research
Boyle Cheng, Anthony E Castellvi, Reginald J Davis, David C Lee, Morgan P Lorio, Richard E Prostko, Chip Wade
BACKGROUND: While low back pain is one of the most prevalent, if not the most prevalent reasons for visits to physicians, a majority of patients with low back pain cannot be given a definitive diagnosis. While there have been substantial advances in imaging technologies over the past 30 years, relatively little has changed in the methodologies for evaluating functionality of the lumbar spine. The current standard of care for function assessment of the lumbar spine focuses on uncontrolled patient directed motion which results in increased inter-patient variability...
2016: International Journal of Spine Surgery
Ivan Stefanovic, Misa Radisavljevic, Dragan Stojanov
With the aim to prevent the so-called adjacent-segment disease in spinal fusion surgery and to serve as the primary surgical procedure for the management of low-back pain syndrome or neurogenic claudication in spinal stenosis, the so-called dynamic spine stabilization is applied using specifically designed implants: interspinous spacers, such as DIAM (Device for Intervertebral Assisted Motion), Coflex, and X-stop. It is commonly accepted that interspinous spacers are made from material that is well tolerated by the body, that their placement is simple, that complications are rare, and that they can greatly benefit the patients...
July 10, 2015: Journal of Neurosurgery. Spine
Kang Lu, Po-Chou Liliang, Hao-Kuang Wang, Cheng-Loong Liang, Jui-Sheng Chen, Tai-Been Chen, Kuo-Wei Wang, Han-Jung Chen
OBJECT Multilevel long-segment lumbar fusion poses a high risk for future development of adjacent-segment degeneration (ASD). Creating a dynamic transition zone with an interspinous process device (IPD) proximal to the fusion has recently been applied as a method to reduce the occurrence of ASD. The authors report their experience with the Device for Intervertebral Assisted Motion (DIAM) implanted proximal to multilevel posterior lumbar interbody fusion (PLIF) in reducing the development of proximal ASD. METHODS This retrospective study reviewed 91 cases involving patients who underwent 2-level (L4-S1), 3-level (L3-S1), or 4-level (L2-S1) PLIF...
August 2015: Journal of Neurosurgery. Spine
Christoph J Siepe, Franziska Heider, Karsten Wiechert, Wolfgang Hitzl, Basem Ishak, Michael H Mayer
BACKGROUND CONTEXT: The role of fusion of lumbar motion segments for the treatment of intractable low back pain (LBP) from degenerative disc disease (DDD) without deformities or instabilities remains controversially debated. Total lumbar disc replacement (TDR) has been used as an alternative in a highly selected patient cohort. However, the amount of long-term follow-up (FU) data on TDR is limited. In the United States, insurers have refused to reimburse surgeons for TDRs for fear of delayed complications, revisions, and unknown secondary costs, leading to a drastic decline in TDR numbers...
August 1, 2014: Spine Journal: Official Journal of the North American Spine Society
Chang-Hyun Lee, Seung-Jae Hyun, Ki-Jeong Kim, Tae-Ahn Jahng, Sang Hoon Yoon, Hyun-Jib Kim
BACKGROUND: Although posterior lumbar interbody fusion (PLIF) has a successful fusion rate, the long-term outcome of PLIF is occasionally below expectations because of adjacent segment degeneration (ASD). OBJECTIVE: To evaluate the ability of hybrid stabilization using DIAM (Device for Interspinous Assisted Motion) to delay ASD. METHODS: An intervention comparison study of 75 patients (hybrid, 25; PLIF, 50) was performed. The indications for hybrid stabilization were facet joint degeneration, Pfirrmann grade II to III, and stenosis at the rostral adjacent segment...
December 2013: Neurosurgery
Wen-fei Ni, Hua-zi Xu, Yang Zhou, Yong-long Chi, Qi-shan Huang, Xiang-yang Wang, Yan Lin, Fang-min Mao, Li-jun Wu
OBJECTIVE: To study indications and complications of interspinous process device Coflex for degenerative disk diseases. METHODS: One hundred and eight patients with degenerative lumbar disc diseases were underwent procedures of surgical decompression and additional fixation of Coflex between November 2007 and October 2010. Sixty-eight patients were male and the other fourty were female, and their average age was 53.5 years (range from 37 to 75 years). Fifty-nine patients were underwent surgery of excision of nucleus pulposus and Coflex fixation, 41 patients were underwent surgery of decompression by fenestration and Coflex fixation, 6 patients were underwent surgery of topping-off, and 2 patients were underwent surgery of Coflex fixation for two level...
September 2012: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
Kee-Yong Ha, Jun-Yeong Seo, Soon-Eok Kwon, Il-Nam Son, Ki-Won Kim, Young-Hoon Kim
OBJECT: The authors undertook this study to investigate the validity of the rationale for posterior dynamic stabilization using the Device for Intervertebral Assisted Motion (DIAM) in the treatment of degenerative lumbar stenosis. METHODS: A cohort of 31 patients who underwent single-level decompression and DIAM placement for degenerative lumbar stenosis were followed up for at least 2 years and data pertaining to their cases were analyzed prospectively. Of these patients, 7 had retrolisthesis...
January 2013: Journal of Neurosurgery. Spine
Antonio P Fabrizi, Raffaella Maina, Luigi Schiabello
Insertion of an interspinous devices has became a common procedure for the treatment of different clinical picture of degenerative spinal disease. We present our experience in 1,575 patients with the use of two different interspinous spacers: Device for Intervertebral Assisted Motion (DIAM) and Aperius PercLID system. From 2000 through 2008, 1,315 consecutive patients underwent DIAM implantation and 260 had an Aperius PercLID procedure. The main surgical indications included: degenerative disc disease (478 patients), canal and/or foraminal stenosis (347 patients), disc herniation (283 patients), black disc and facet syndrome (143) and topping-off (64 patients)...
May 2011: European Spine Journal
Josip Buric, Massimiliano Pulidori
Patients with low back pain (LBP) suffer chronic disability. In 40% of LBP patients degenerative disc disease (DDD) seems to be the cause. This prospective case series assessed the efficacy of the interspinous device for intervertebral assisted motion (DIAM™) in patients with LBP resulting from DDD. All patients were initially assessed by physical examinations, magnetic resonance imaging, dynamic X-rays and provocative discography. Eligible patients (n = 52) had LBP for a minimum of 4 months, and received surgery with the DIAM™ system 2-4 weeks after diagnosis...
August 2011: European Spine Journal
Yu Zhao, Yi-Peng Wang, Gui-Xing Qiu, Hong Zhao, Jian-Guo Zhang, Xi Zhou
BACKGROUND: The Dynamic Interspinous Assisted Motion (DIAM) system was designed to stabilize degenerative spinal segments without fusion surgery, maintain segment motion and prevent adjacent segment degeneration. The aim of this study was to investigate clinical efficacy of the DIAM system in treatment of degenerative lumbar disease in China. METHODS: Eight cases of lumbar vertebral instability were treated with the DIAM system at Peking Union Medical College Hospital from June 2006 to January 2008...
November 2010: Chinese Medical Journal
Yoo-Joon Sur, Chae-Gwan Kong, Jong-Beom Park
Recently, the Device for Intervertebral Assisted Motion (DIAM™) has been introduced for surgery of degenerative lumbar disc diseases. The authors performed the current study to determine the survivorship of DIAM™ implantation for degenerative lumbar disc diseases and risk factors for reoperation. One hundred and fifty consecutive patients underwent laminectomy or discectomy with DIAM™ implantation for primary lumbar spinal stenosis or disc herniation. The characteristics of the 150 patients included the following: 84 males and 66 females; mean age at the time of surgery, 46...
February 2011: European Spine Journal
Daniel K Park, Eric L Lin, Frank M Phillips
STUDY DESIGN: Prospective, randomized trial. OBJECTIVE: To assess the in vivo kinematics of the cervical spine after cervical fusion and arthroplasty. SUMMARY OF BACKGROUND DATA: Compared with spinal fusion, disc replacement may impede the development of adjacent segment disease. To achieve this goal, any arthroplasty device should achieve desired spinal alignment while maintaining physiologic spinal motion at both the operated and surrounding motion segments...
April 20, 2011: Spine
Sung-Joo Ryu, In-Soo Kim
OBJECTIVE: This study assessed the safety and efficacy of one level unilateral laminotomy bilateral decompression (ULBD) with the placement of a device for intervertebral assisted motion (DIAM) compared with one level ULBD only in elderly patients with degenerative lumbar spinal stenosis (DLSS). METHODS: A non randomized prospective analysis was performed on 16 patients who underwent one level ULBD with DIAM (Group A) and 20 patients with one level ULBD only (Group B) between February 2007 and March 2008...
May 2010: Journal of Korean Neurosurgical Society
F A Krappel
The DIAM (Device for Interspinous Assisted Motion) interspinous device offers the possibility of a viscoelastic supplementation of the lumbar motion segment with a small, reversible operation. It is intended as a restabilisation procedure after a discectomy to avoid facet joint overload and as a topping of procedure for the segment adjacent to a fusion. The device has been on the German market since 2004. There are several biomechanical studies available showing an effect mainly in extension and flexion, but hardly any in rotation and lateral inclination...
June 2010: Der Orthopäde
Hongliang Chen, Wenyuan Ding
OBJECTIVE: To elucidate the new development, structural features and application of the lumbar inter-spinous process non-fusion techniques. METHODS: With the review of the development course and important research works in the field of the lumbar inter-spinous process non-fusion techniques, the regularity summary, science induction, and prospect were carried out. RESULTS: The lumbar inter-spinous process non-fusion technique was a part of non-fusion insert of spinal division posterior surface...
March 2010: Chinese Journal of Reparative and Reconstructive Surgery
John William Powell, Rick C Sasso, Newton H Metcalf, Paul A Anderson, John A Hipp
STUDY DESIGN: Kinematic study of a single site in an investigational device exemption trial. OBJECTIVE: Evaluate the center of rotation (COR) after Bryan cervical arthroplasty and compare adjacent segment motion after cervical disk arthroplasty and fusion using validated radiographic analysis. SUMMARY OF BACKGROUND DATA: The goal of cervical arthroplasty is to reestablish spinal kinematics after anterior decompression. Excellent maintenance of range of motion has been reported for a variety of the prostheses; however, the manner the prostheses perform this task is different...
April 2010: Journal of Spinal Disorders & Techniques
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