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Introduction: Minimally Invasive Spine Surgery video supplement

Praveen V. Mummaneni

This video supplement of Neurosurgery Focus is devoted to minimally invasive spine surgery. Minimally invasive spine surgery has gained popularity amongst patients and physicians over the past decade because it has been shown in select instances to lower blood loss and reduce length of hospital stay for appropriately selected candidates.

This supplement includes videos from many of the leaders in the field. Pioneers like Frank LaMarca, Paul Park, Cheerag Upadhyaya, Juan Uribe, and Mike Wang have all sent in videos depicting minimally invasive spinal deformity surgery options. The supplement also includes videos from several different countries, demonstrating how widespread and nuanced minimally invasive spinal procedures have become. Drs. Barbagallo, Certo, Sciacca, and Albanese from Italy; Drs. Gragnaniello and Seex from Australia; and Drs. Liao, Wu, Huang, Wang, Chang, Cheng, and Shih from Taiwan have all sent in nuanced surgical videos that will be of interest to many viewers.

I personally enjoyed viewing videos on lumbar degenerative disease surgery depicting unique surgical nuances to treat common problems. Dr. Beejal Amin, Dr. Harel Deutsch, Dr. Daniel Lu, and Dr. Adam Kanter have each submitted videos depicting lumbar decompression and/or fusion for lumbar degenerative stenosis and spondylosis.

This supplement also included videos depicting the minimally invasive treatment of uncommon spinal pathologies as well. Videos from Dr. Fred Geisler, Dr. John O'Toole, and Dr. Noel Perin covered topics as varied as sacroiliac joint dysfunction, spinal arteriovenous malformations, and sympathetic chain surgery.

I hope that you enjoy this issue of Neurosurgical Focus devoted to videos depicting the surgical nuances of minimally invasive spinal surgery. This video supplement has international appeal, and it has been an honor to be a guest editor on this superb supplement.

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Editorial. Nuances of restoration of lumbar lordosis using an MIS anterior column release versus posterior 3-column osteotomy

Michael S. Virk and Praveen V. Mummaneni

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Minimally invasive spine surgery

Adam S. Kanter and Praveen V. Mummaneni

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Nucleus replacement technologies

Invited submission from the Joint Section Meeting on Disorders of the Spine and Peripheral Nerves, March 2007

Domagoj Coric and Praveen V. Mummaneni

✓ Nucleus replacement offers a less invasive alternative to traditional fusion or total disc replacement techniques in the treatment of symptomatic lumbar degenerative disc disease (DDD). The authors discuss the classification of nucleus replacement devices as well as their potential indications. The authors review the history and evolution of nucleus replacement devices emphasizing several that are actively in US Investigational Device Exemption pilot feasibility trials. Nucleus replacement devices can be functionally categorized as elastomeric and mechanical. A classification scheme is discussed. Nucleus replacement remains investigational, but early clinical results have been encouraging. Further clinical investigation with well-designed prospective, randomized pivotal trials is needed to determine the efficacy of nucleus replacement in the treatment of lumbar DDD, as well as its ideal indications.

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The future in the care of the cervical spine: interbody fusion and arthroplasty

Invited submission from the Joint Section Meeting on Disorders of the Spine and Peripheral Nerves, March 2004

Praveen V. Mummaneni and Regis W. Haid

✓ In the past 50 years tremendous advances have been made in the treatment of cervical disc disease with cervical fusion. Fusion rates have surpassed 95% after application of anterior cervical implants. Adjacent-segment degeneration, however, has plagued the long-term clinical success of cervical fusion.

Cervical arthroplasty has been introduced to maintain cervical motion and potentially avoid or minimize adjacent-segment degeneration. If cervical arthroplasty is successful, the long-term results of surgery for cervical disc disease may improve; however, there are associated drawbacks that must be overcome. Implant wear, fatigue, and failure have been reported in cases of large-joint arthroplasty, and research is underway to limit these problems in cervical arthroplasty.

In this article the authors trace the evolution of cervical fusion and the new technique of cervical arthroplasty. The nomenclature of cervical arthroplasty will also be introduced.

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Cervical disc arthroplasty compared with allograft fusion

Edward C. Benzel

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The future in the care of the cervical spine: interbody fusion and arthroplasty

Invited submission from the Joint Section Meeting on Disorders of the Spine and Peripheral Nerves, March 2004

Praveen V. Mummaneni and Regis W. Haid

✓ In the past 50 years tremendous advances have been made in the treatment of cervical disc disease with cervical fusion. Fusion rates have surpassed 95% after application of anterior cervical implants. Adjacent-segment degeneration, however, has plagued the long-term clinical success of cervical fusion.

Cervical arthroplasty has been introduced to maintain cervical motion and potentially avoid or minimize adjacent-segment degeneration. If cervical arthroplasty is successful, the long-term results of surgery for cervical disc disease may improve; however, there are associated drawbacks that must be overcome. Implant wear, fatigue, and failure have been reported in cases of large-joint arthroplasty, and research is underway to limit these problems in cervical arthroplasty.

In this article the authors trace the evolution of cervical fusion and the new technique of cervical arthroplasty. The nomenclature of cervical arthroplasty will also be introduced.

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Disc arthroplasty

Ricardo V. Botelho

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Introduction to Lumbosacral and Sacropelvic Fixation Strategies

Patrick C. Hsieh and Praveen V. Mummaneni

We are pleased to present this Neurosurgical Focus video supplement on lumbosacral and sacropelvic fixation strategies. Despite advancement in surgical techniques and technologies in spine, achieving consistent solid fusion across the lumbosacral junction remains a major challenge. The anatomy of the lumbosacral junction allows for a higher range of motion compared to other areas of the thoracolumbar spine. The L5-S1 interspace is exposed to significant shear forces. As a result, complications such as pseudoarthrosis, screw pull-out, implant fracture, or sacral fractures can occur. Complications are particularly seen in long fusion constructs ending across the lumbosacral junction. To reduce these complications, various lumbosacral and sacropelvic fixation techniques have been developed and utilized.

The current supplement is intended to provide instructional videos that illustrate several current techniques for lumbosacral and sacropelvic fixation. The collection includes techniques for anterior L5-S1 interbody fusion, minimally invasive L5-S1 interbody fusions, lumbosacral pedicle screw placement, sacroiliac fusion, and sacro-alar-iliac screw placement. The authors of the videos in the supplement have provided detailed narration and video illustration to describe the nuances of the various open and minimally invasive techniques for lumbosacral and sacral-pelvic fixation. We are pleased to have such a collection of quality video illustration from experts in the field. It's been our privilege to serve as guest editors for this supplement and we believe that you will enjoy the contents of this supplement.

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Introduction: Adult spinal deformity

David O. Okonkwo and Praveen V. Mummaneni