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Topic Editor Regis W. Haid

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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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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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Eric W. Scott, Regis W. Haid Jr., and David Peace

✓ Only four cases of Type I odontoid fracture have been previously described in the English literature. Most authors consider this lesion to be stable, although the mechanism(s) of injury has not been clearly elucidated. A case of Type I odontoid fracture in association with atlanto-occipital and atlantoaxial dislocation resulting in death is presented. The normal ligamentous anatomy is reviewed and proposed mechanisms for this injury are discussed. The radiographic features of all reported cases of this type are reviewed. It is proposed that the Type I odontoid fracture is a likely manifestation of atlanto-occipital instability and rarely occurs as an isolated or stable injury.

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Atul Goel

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Lumbar interbody fusion: state-of-the-art technical advances

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

Praveen V. Mummaneni, Regis W. Haid, and Gerald E. Rodts

✓ During the past few decades, three techniques have been used to achieve circumferential lumbar interbody fusion (LIF). They include posterior LIF, anterior LIF with supplemental posterior fixation, and transforaminal LIF. In this article, the authors describe the indications and contraindications for the use of interbody fusion. The advantages and disadvantages of each will be discussed in detail. Additionally, strategies for minimally invasive access and options for interbody spacer materials will be discussed.

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Alexander F. Post, Prithvi Narayan, and Regis W. Haid Jr.

✓ The authors report on the management of occipital neuralgia secondary to an abnormality of the atlas in which the posterior arch was separated by a fibrous band from the lateral masses, resulting in C-2 nerve root compression. The causes and treatments of occipital neuralgia as well as the development of the atlas are reviewed.

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Harel Deutsch, Regis W. Haid, Gerald E. Rodts, and Praveen V. Mummaneni

Postlaminectomy cervical kyphosis is an important consideration when performing surgery. Identifying factors predisposing to postoperative deformity is essential. The goal is to prevent postlaminectomy cervical kyphosis while exposing the patient to minimal additional morbidity. When postlaminectomy kyphosis does occur, surgical correction is often required and performed via an anterior, posterior, or combined approach. The authors discuss the indications for surgical approaches as well as clinical results.

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Matthew T. Mayr, Stephen Hunter, Scott C. Erwood, and Regis W. Haid Jr

✓ The authors describe two cases of calcifying pseudoneoplasms, rare degenerative lesions that mimic tumor or infection. One case involved the cervical spine and the second the thoracic spine. Both patients experienced progressive myelopathy from extradural compression of the spinal cord. The radiological evaluation, pathological findings in the lesions, treatment, and follow up are described. Total or subtotal excision can relieve symptoms and prevent recurrence of this lesion.