200 results match your criteria Atlantoaxial Injury and Dysfunction


Dysphagia following C1 laminectomy and posterior atlantoaxial fixation for retro-odontoid pseudotumor: a case report.

Br J Neurosurg 2018 Nov 19:1-4. Epub 2018 Nov 19.

b Department of Neurosurgery , Mie University Graduate School of Medicine , Tsu , Mie , Japan.

Purpose: Although dysphagia is known potential complication of cervical spine surgery, it rarely occurs after a posterior approach. We describe an unusual case of a retro-odontoid pseudotumor that suffered dysphagia following a C1 laminectomy and posterior atlantoaxial fixation.

Materials And Methods: A 79-year-old man presented with progressive tetraparesis and bladder and bowel dysfunction due to severe compression to cervical cord at C1 from a retro-odontoid pseudotumor. Read More

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https://www.tandfonline.com/doi/full/10.1080/02688697.2018.1
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http://dx.doi.org/10.1080/02688697.2018.1538485DOI Listing
November 2018
13 Reads

"Rule of Spence" and Dickman's Classification of Transverse Atlantal Ligament Injury Revisited: Discrepancy of Prediction on Atlantoaxial Stability Based on Clinical Outcome of Nonoperative Treatment for Atlas Fractures.

Spine (Phila Pa 1976) 2019 Mar;44(5):E306-E314

Department of Spine Surgery, Center for Orthopedics, Daping Hospital, Army Medical University.

Detailed clinical information of 13 adult patients with acute atlantal fractures underwent nonoperative treatment was retrospectively studied. "Rule of Spence" was found inaccurate in predicting either integrity of transverse atlantal ligament (TAL) or atlantoaxial stability, whereas Dickman's classification of TAL injury was more superior to "rule of Spence" on both prediction.

Study Design: A retrospective study. Read More

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http://dx.doi.org/10.1097/BRS.0000000000002877DOI Listing
March 2019
6 Reads

Pros and Cons of C2 Nerve Sectioning/Preservation in Posterior Fusion for Congenital Atlantoaxial Dislocation.

World Neurosurg 2018 Oct 19;118:e925-e932. Epub 2018 Jul 19.

Department of Neurosurgery, Sahaydri Superspeciality Hospital, Nashik, Maharashtra, India.

Objective: Deliberate C2 nerve root sectioning and its preservation have been described during posterior fusion for atlantoaxial dislocation (AAD). However, the associated outcomes have been less studied, especially in congenital AAD. Our objective was to study the clinical outcomes after C2 nerve root sectioning and the feasibility of C2 preservation in these patients. Read More

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http://dx.doi.org/10.1016/j.wneu.2018.07.101DOI Listing
October 2018
8 Reads

Brown-Sequard syndrome caused by hyperextension in a patient with atlantoaxial subluxation due to an os odontoideum.

Acta Orthop Traumatol Turc 2018 May 23;52(3):240-243. Epub 2017 Nov 23.

Department of Orthopaedic Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea. Electronic address:

Brown-Sequard syndrome is an uncommon complication of atlantoaxial arthrodesis. A 50-year-old female visited our emergency department after falling from a ladder. Radiologic evaluations revealed chronic C1-2 instability with acute spinal cord injury. Read More

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http://dx.doi.org/10.1016/j.aott.2017.11.005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6136337PMC
May 2018
19 Reads

Lateral atlantoaxial joint meniscoid volume in individuals with whiplash associated disorder: A case-control study.

Musculoskelet Sci Pract 2018 02 10;33:46-52. Epub 2017 Nov 10.

Discipline of Physiotherapy, The University of Newcastle, University Drive, Callaghan, 2308, NSW, Australia.

Background: Lateral atlantoaxial (LAA) joints are established sources of nociceptive input in chronic whiplash associated disorder (WAD). These joints contain intra-articular meniscoids that may be damaged in whiplash trauma. LAA joint meniscoid morphology has not been investigated comprehensively in a chronic WAD population, and it is unclear whether morphological differences exist compared to a pain-free population. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S24687812173017
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http://dx.doi.org/10.1016/j.msksp.2017.11.004DOI Listing
February 2018
5 Reads

Biomechanical study of novel unilateral C1 posterior arch screws and C2 laminar screws combined with an ipsilateral crossed C1-C2 pedicle screw-rod fixation for atlantoaxial instability.

Arch Orthop Trauma Surg 2017 Oct 29;137(10):1349-1355. Epub 2017 Aug 29.

Department of Orthopedics, The Second Affiliated Hospital, Chongqing Medical University, No. 76 Linjiang Road, Yuzhong District, Chongqing, 400010, People's Republic of China.

Introduction: Current surgical methods to treat atlantoaxial instability pose potential risks to the surrounding blood vessels and nerves of operative approach. Therefore, more secure and highly effective methods are expected. This study sought to assess the biomechanical efficacy of a novel unilateral double screw-rod fixation system by comparing with traditional and emerging fixation methods in cadaveric models. Read More

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http://dx.doi.org/10.1007/s00402-017-2781-0DOI Listing
October 2017
17 Reads

Sublaminar wire migration into the medulla oblongata: a case report.

J Spine Surg 2017 Jun;3(2):267-271

1Division of Neurosurgery, Department of Surgery, 2Division of Neuroradiology, Department of Radiology, McMaster University, Hamilton, Ontario, Canada.

Atlantoaxial procedures have been developed in an effort to ensure solid C1-C2 fusion. However, techniques that involve sublaminar wiring have the potential for neural structure injury. We present the management of a patient who previously underwent Gallie fusion 10 years ago and is presenting with a dislodged titanium wire that has migrated into the medulla oblongata. Read More

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http://dx.doi.org/10.21037/jss.2017.05.09DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506317PMC
June 2017
18 Reads

Instrumented fusion in a 12-month-old with atlanto-occipital dislocation: case report and literature review of infant occipitocervical fusion.

Childs Nerv Syst 2017 Aug 6;33(8):1253-1260. Epub 2017 Jul 6.

Division of Pediatric Neurosurgery, Dell Children's Hospital, Austin, TX, USA.

Background: The treatment of atlantoaxial dislocation in very young children is challenging and lacks a consensus management strategy.

Discussion: We review the literature on infantile occipitocervical (OC) fusion is appraised and technical considerations are organized for ease of reference. Surgical decisions such as graft type and instrumentation details are summarized, along with the use of bone morphogenic protein and post-operative orthoses. Read More

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http://dx.doi.org/10.1007/s00381-017-3497-8DOI Listing
August 2017
39 Reads

[Influence of Osseous and Ligamentous Injuries on the Stability of the Atlantoaxial Complex].

Z Orthop Unfall 2017 Jun 6;155(3):318-323. Epub 2017 Jul 6.

Klinik und Poliklinik für Orthopädie und Unfallchirurgie, Uniklinik Köln.

The odontoid process and the transverse ligament are the most important structures stabilising the atlantoaxial complex. It has not been fully elucidated how injuries of these structures contribute towards instability and a potential narrowing of the spinal canal. Therefore, our investigation aimed to perform a biomechanical analysis of spinal width and dislocation of the odontoid process depending on injuries of the aforementioned structures. Read More

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http://dx.doi.org/10.1055/s-0043-100219DOI Listing
June 2017
10 Reads

Influence of systemic bone mineral density on atlantoaxial subluxation in patients with rheumatoid arthritis.

Osteoporos Int 2017 06 2;28(6):1931-1938. Epub 2017 Mar 2.

Department of Neurosurgery, Hanyang University Medical Center, 222-1, Wangsimni-ro, Seongdong-gu, Seoul, 133-792, South Korea.

Osteopenia and osteoporosis were independent predictive factors for higher atlantoaxial subluxation occurrence in patients with lower body mass index. Our findings suggest that patients with rheumatoid arthritis with osteopenia or osteoporosis, particularly those with lower body mass index (BMI), should be screened regularly to determine the status of their cervical spines.

Introduction: Cervical spine involvement in rheumatoid arthritis (RA) patients may cause serious adverse effects on quality of life and overall health. Read More

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http://dx.doi.org/10.1007/s00198-017-3972-9DOI Listing
June 2017
4 Reads

Compression-distraction reduction surgical verification and optimization to treat the basilar invagination and atlantoaxial dislocation: a finite element analysis.

Biomed Eng Online 2016 Dec 28;15(Suppl 2):168. Epub 2016 Dec 28.

School of Biomedical Engineering, Capital Medical University, Beijing, 100069, China.

Background: Basilar invagination (BI) combined with atlantoaxial dislocation (AAD) leads to foramen magnum stenosis and medullary spinal cord compression, causing nerve dysfunction. The purpose of the surgery is to remove the bony compression at brainstem ventral side and fix the unstable spinal segment and make it fused stably. Occipital cervical internal fixation system that simultaneously reduces atlantoaxial horizontal and vertical dislocation are established. Read More

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http://dx.doi.org/10.1186/s12938-016-0246-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5259821PMC
December 2016
9 Reads

C1 lateral mass screw insertion caudally from C2 nerve root - An alternate method for insertion of C1 screws: A technical note and preliminary clinical results.

J Orthop Sci 2017 Mar 12;22(2):213-217. Epub 2016 Nov 12.

Department of Orthopedic Surgery, Tokyo Women's Medical University, Tokyo, Japan.

Background: C1 lateral mass screw was widely used for fixation of the upper cervical spine. However, massive bleeding from the C1-2 venous plexus is sometimes encountered. In this study, we proposed an alternate method for C1 lateral mass screw insertion, which involves insertion of the screws caudally from the C2 nerve root to reduce bleeding from C1-2 venous plexus. Read More

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http://dx.doi.org/10.1016/j.jos.2016.10.008DOI Listing
March 2017
11 Reads

Biomechanical Study of 3 Atlantoaxial Proactive Vertebral Artery Injury Prevention Fixation Combinations.

World Neurosurg 2016 Sep 23;93:293-8. Epub 2016 Jun 23.

Department of Orthopedics, The Second Affiliated Hospital, The Second Military Medical University, Shanghai, China. Electronic address:

Objective: To evaluate the biomechanical stability of 3 atlantoaxial proactive vertebral artery injury prevention fixation combinations.

Methods: We used 6 fresh human cadaveric C0-C4 specimens for the biomechanical test with moment control in 6 loading directions. First, range of motion (ROM) was measured in the intact specimens before they were destabilized; next, ROM of the 4 conditions fixed with 4 different fixation combinations were tested in alternating sequence: bilateral transarticular screw (TAS) and 3 test combinations: C1 laminar hook (C1LH) and C2 intralaminar screw (C2ILS) on 1 side combined with TAS (C1LH-C2ILS/TAS) or C1LH and TAS (C1LH-C2ILS/C1LH-TAS) or C1LH and C2ILS on the other side (C1LH-C2ILS/C1LH-C2ILS). Read More

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http://dx.doi.org/10.1016/j.wneu.2016.06.061DOI Listing
September 2016
6 Reads

[Selection of indications and surgical treatment of basilar invagination with atlantoaxial dislocation].

Zhonghua Yi Xue Za Zhi 2015 Sep;95(35):2829-33

Department of Spinal Surgery, the First Affiliated Hospital of Xinjiang Medical University, Xinjiang Urmuqi 830054, China; Email:

Objective: To evaluate the indications and effect of surgical treatment of basilar invagination (BI) with atlantoaxial dislocation (AAD) on the basis of retrospective analysis of the clinical and imaging data of patients.

Methods: Consecutive 21 patients with BI and AAD were surgically treated in Department of Spinal Surgery, The First Affiliated Hospital of Xinjiang Medical University from July 2000 to December 2013. There were 10 males and 11 females, aged from 7 to 59 years, with a mean of 36. Read More

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September 2015
6 Reads

Atlantoaxial Rotatory Fixed Dislocation: Report on a Series of 32 Pediatric Cases.

Spine (Phila Pa 1976) 2016 Jun;41(12):E725-32

*Orthopaedic Department, Peking University Third Hospital, Beijing, China †Division of Spinal Surgery, NYU Medical Center/Hospital for Joint Diseases, NYU school of Medicine, New York, NY.

Study Design: Retrospective case series of atlantoaxial rotatory fixed dislocation (AARFD).

Objective: To describe clinical features and the surgical treatment of AARFD.

Summary Of Background Data: The classification and treatment strategy for atlantoaxial rotatory fixation (AARF) were previously described and remained controversial. Read More

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http://dx.doi.org/10.1097/BRS.0000000000001414DOI Listing
June 2016
9 Reads

Subaxial cervical spine involvement in symptomatic rheumatoid arthritis patients: Comparison with cervical spondylosis.

Semin Arthritis Rheum 2015 Aug 5;45(1):9-17. Epub 2015 Mar 5.

Department of Rheumatology (Planta 10-2), Hospital Universitario de Bellvitge-IDIBELL, Feixa Llarga s/n, Hospitalet de Llobregat, Barcelona 08907, Spain.

Objective: To investigate the frequency, location, characteristics, and clinical significance of subaxial involvement (below C1-C2) in a series of patients with rheumatoid arthritis (RA) and symptomatic involvement of the cervical spine.

Methods: A total of 41 patients with RA were examined via cervical spine magnetic resonance imaging (MRI). A comparative analysis of the incidence of the different types of subaxial lesions was performed between these patients and 41 age- and sex-matched patients with symptomatic cervical spondylosis. Read More

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http://dx.doi.org/10.1016/j.semarthrit.2015.02.014DOI Listing
August 2015
10 Reads

Cervical myelopathy due to atraumatic odontoid fracture in patients with rheumatoid arthritis: A case series.

Mod Rheumatol 2017 Sep 29;27(5):901-904. Epub 2015 Jun 29.

a Department of Orthopedic Surgery , Hokkaido University Graduate School of Medicine , Sapporo , Japan.

To highlight the risk of cervical myelopathy due to occult, atraumatic odontoid fracture in patients with rheumatoid arthritis, we retrospectively reviewed radiographic findings and clinical observations for 7 patients with this disorder. This fracture tends to occur in patients with long-lasting rheumatoid arthritis and to be misdiagnosed as simple atlantoaxial dislocation. Since this fracture causes multidirectional instability between C1 and C2 and is expected to have poor healing potential due to bone erosion and inadequate blood supply, posterior spinal arthrodesis surgery is indicated upon identification of the fracture to prevent myelopathy. Read More

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http://dx.doi.org/10.3109/14397595.2015.1029222DOI Listing
September 2017
5 Reads

In vitro biomechanics of the craniocervical junction-a sequential sectioning of its stabilizing structures.

Spine J 2015 Jul 7;15(7):1618-28. Epub 2015 Feb 7.

MERC (Musculoskeletal Education and Research Center), Globus Medical, Inc., 2560 General Armistead Ave., Audubon, PA 19403, USA.

Background Context: Occipitocervical dislocations involve translations of the craniocervical joints. The relative contributions of each ligament to overall stability and the effects of the occipitoatlantal joint capsules on the pathologic translation are unknown. Although incidences of occipitocervical dislocations are rare after blunt trauma, they are usually fatal. Read More

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http://dx.doi.org/10.1016/j.spinee.2015.02.004DOI Listing
July 2015
12 Reads

Motion preservation in type II odontoid fractures using temporary pedicle screw fixation: a preliminary study.

Eur Spine J 2015 Apr 28;24(4):686-93. Epub 2014 Dec 28.

Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, 88 Jie Fang Road, Hangzhou, 310009, Zhejiang, People's Republic of China.

Purpose: To assess the feasibility of temporary pedicle screw fixation for motion preservation of type II odontoid fractures unsuitable for anterior screw.

Methods: Between 2012 and 2013, temporary pedicle screw fixation was performed in 13 patients with type II odontoid fractures unsuitable for anterior screw. The patients were 10 men and 3 women with an average age of 40. Read More

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http://dx.doi.org/10.1007/s00586-014-3693-0DOI Listing
April 2015
6 Reads

Acute Traumatic Cervical Cord Injury in Pediatric Patients with os Odontoideum: A Series of 6 Patients.

World Neurosurg 2015 Jun 19;83(6):1180.e1-6. Epub 2014 Dec 19.

Department of Orthopedics, Xinqiao Hospital, The Third Military Medical University, Chongqing, China.

Objective: Os odontoideum can lead to instability of the atlantoaxial joint and places the spinal cord at significant risk for acute traumatic catastrophic events or chronic neurologic change. The purpose of this study was to retrospectively review acute cervical cord injury after minor trauma in 6 pediatric patients with os odontoideum.

Methods: Between 2012 and 2013, 6 pediatric patients with os odontoideum who suffered acute traumatic cervical cord injury were reviewed retrospectively. Read More

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http://dx.doi.org/10.1016/j.wneu.2014.12.036DOI Listing
June 2015
22 Reads

Diagnostic evaluation, monitoring, and perioperative management of spinal cord compression in patients with Morquio syndrome.

Mol Genet Metab 2015 Jan 30;114(1):11-8. Epub 2014 Oct 30.

Department of Anesthesiology & Critical Care, Nemours/Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE 19803-3607, USA. Electronic address:

Mucopolysaccharidosis IVA is an autosomal recessive condition caused by mutations in the GALNS gene, which encodes N-acetylgalactosamine-6-sulfatase, also called galactosamine-6-sulfatase (GALNS). A reduction in or absence of effective GALNS leads to faulty catabolism of keratan sulfate and chondroitin-6-sulfate within the lysosome; their accumulation causes cell, tissue, and organ dysfunction. The connective tissue, cartilage, ligaments, and bone of patients with Morquio A syndrome are particularly affected. Read More

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http://dx.doi.org/10.1016/j.ymgme.2014.10.010DOI Listing
January 2015
52 Reads

Static and dynamic CT imaging of the cervical spine in patients with rheumatoid arthritis.

Skeletal Radiol 2015 Feb 18;44(2):241-8. Epub 2014 Sep 18.

Department of Radiology, Uppsala University Hospital, 751 85, Uppsala, Sweden,

Objective: To compare CR with CT (static and dynamic) to evaluate upper spine instability and to determine if CT in flexion adds value compared to MR imaging in neutral position to assess compression of the subarachnoid space and of the spinal cord.

Materials And Methods: Twenty-one consecutive patients with atlantoaxial subluxation due to rheumatoid arthritis planned for atlantoaxial fusion were included. CT and MRI were performed with the neck in the neutral position and CT also in flexion. Read More

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http://dx.doi.org/10.1007/s00256-014-2000-9DOI Listing
February 2015
6 Reads

Treatment of cervicogenic headache with cervical epidural steroid injection.

Curr Pain Headache Rep 2014 Sep;18(9):442

Thomas Jefferson University Hospital, 834 Chestnut Street T150, Philadelphia, PA, 19454, USA.

Cervicogenic headache (CGH) is defined as referred pain from various cervical structures innervated by the upper three cervical spinal nerves. Such structures are potential pain generators, and include the atlanto-occipital joint, atlantoaxial joint, C2-3 zygapophysial joint, C2-3 intervertebral disc, cervical myofascial trigger points, as well as the cervical spinal nerves. Various interventional techniques, including cervical epidural steroid injection (CESI), have been proposed to treat this disorder. Read More

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http://dx.doi.org/10.1007/s11916-014-0442-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4148620PMC
September 2014
2 Reads

Nontraumatic atlantoaxial rotatory subluxation: grisel syndrome. Case report and literature review.

Global Spine J 2014 Aug 13;4(3):179-86. Epub 2014 Jan 13.

Praça Vilagran Cabrita, School of Medicine Nova Esperança, João Pessoa, Paraíba, Brazil.

Study Design Case report and literature review. Objective To describe a case of nontraumatic atlantoaxial rotatory subluxation (Grisel syndrome) and to review clinical and radiologic aspects, physiopathology, and treatment of this lesion. There is no well-established protocol in the management of patients without spontaneous reduction. Read More

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http://dx.doi.org/10.1055/s-0033-1363936DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4111947PMC
August 2014
2 Reads

Grisel's syndrome: an unusual cause of torticollis.

J Pediatr Rehabil Med 2013 ;6(3):175-80

Physical Medicine, Rehabilitation, and Sports Medicine Department, University of Puerto Rico, San Juan, Puerto Rico.

Purpose: The objective of this paper is to present a case series of patients with diagnosis of torticollis due to Grisel's syndrome and, in doing so, raise awareness of an unusual condition that could be fatal. A review of the literature is presented regarding diagnosis and treatment.

Methods: Case series of three patients that were 7, 10, and 12 years old with history of tonsillitis or neck surgery consulted to the service of Rehabilitation Medicine. Read More

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http://dx.doi.org/10.3233/PRM-130253DOI Listing
July 2014
6 Reads

Left-right axial rotation within C1-2 after implant removal.

J Neurosurg Spine 2013 Dec 20;19(6):688-93. Epub 2013 Sep 20.

Zentrum für Wirbelsäulenchirurgie, Orthopaedie, und Traumatologie; and.

Object: Surgical treatment of atlantoaxial injuries may be performed by a variety of surgical procedures, with each of these having its own specific advantages and disadvantages. To preserve the range of motion within the atlantoaxial joint after surgical treatment, posterior atlantoaxial screw fixation according to the method of Goel and Harms could be beneficial. This technique is not considered to fix the joint permanently if the screws are removed. Read More

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http://dx.doi.org/10.3171/2013.8.SPINE1349DOI Listing
December 2013
3 Reads

Recurrent embolic strokes associated with vertical atlantoaxial subluxation in a patient with rheumatoid arthritis: a case report and review of literature.

J Stroke Cerebrovasc Dis 2013 Nov 2;22(8):e676-81. Epub 2013 Aug 2.

Department of Neurology, Juntendo University Urayasu Hospital, Chiba, Japan.

We report a 78-year-old woman with rheumatoid arthritis who developed recurrent embolic cerebellar strokes associated with vertical atlantoaxial subluxation (AAS). On contrast angiography, the bilateral vertebral arteries (VAs) were occluded between the C1 and C2 levels, and the distal parts of bilateral VA were supplied by the collateral circulations. Dynamic cerebral angiography and carotid duplex ultrasonography showed that blood flow was substantially decreased in the left VA and left posterior inferior cerebellar artery on cervical anteflexion. Read More

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http://dx.doi.org/10.1016/j.jstrokecerebrovasdis.2013.07.010DOI Listing
November 2013
6 Reads

C1 posterior arch crossing screw fixation for atlantoaxial joint instability.

Spine (Phila Pa 1976) 2013 Oct;38(22):E1397-404

From the Department of Orthopaedic Surgery, Shengjing Hospital of China Medical University, Shenyang City, Liaoning Province, P.R. China.

Study Design: Anatomical measurements and in vitro biomechanical testing were performed to evaluate a new method for posterior C1 fixation.

Objective: This study sought to assess C1 posterior arch crossing screw fixation for posterior C1-C2 fixation, using anatomical measurements and biomechanical testing with traditional C1 pedicle screws (PS) in a cadaveric model.

Summary Of Background Data: Atlantoaxial instability often requires surgery, and the current methods for atlas fixation incur some risk to the vascular and neurological tissues. Read More

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http://dx.doi.org/10.1097/BRS.0b013e3182a40869DOI Listing
October 2013
5 Reads

Catastrophic head and neck injuries in judo players in Japan from 2003 to 2010.

Am J Sports Med 2013 Aug 13;41(8):1915-21. Epub 2013 Jun 13.

Department of Orthopaedics, Tokyo Kosei Nenkin Hospital, 5-1 Tsukudo-cho Shinjuku-ku, Tokyo, 162-8543, Japan.

Background: Few studies have documented catastrophic head and neck injuries in judo, but these injuries deserve greater attention.

Purpose: To determine the features of catastrophic head and neck injuries in judo.

Study Design: Descriptive epidemiological study. Read More

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http://dx.doi.org/10.1177/0363546513490662DOI Listing
August 2013
9 Reads

[Research on the correlation between surgical treatment for atlantoaxial dislocation and dredging Governor vessel].

Zhongguo Gu Shang 2012 Nov;25(11):915-9

Research Center of Upper Cervical Vertebrae, China-Japan Firendship Hospital, Ministry of Public Health, Beijing 100029, China.

Objective: To research the correlation between surgical treatment for atlantoaxial dislocation and dredging Governor vessel.

Methods: From June 2004 to June 2010,113 patients were reviewed, including 65 males and 48 females, with the mean age of 42.6 years (ranged, 8 to 64 years). Read More

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November 2012
6 Reads

Mucopolysaccharide disorders in orthopaedic surgery.

J Am Acad Orthop Surg 2013 Jan;21(1):12-22

Seattle Children's Hospital, WA, USA.

The mucopolysaccharidoses (MPSs) are a family of disorders characterized by the accumulation of glycosaminoglycans, which is caused by enzyme deficiencies in the lysosomal metabolism of these normal cellular byproducts. Skeletal abnormalities are early and prominent features of MPS, and the orthopaedic surgeon is often the first healthcare provider to raise suspicion for this diagnosis. Recently developed medical therapies for the management of MPS (ie, hematopoietic stem cell transplantation, intravenous enzyme replacement therapy) have led to increased lifespan but have not had much effect on the development of skeletal deformities. Read More

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http://dx.doi.org/10.5435/JAAOS-21-01-12DOI Listing
January 2013
13 Reads

Modified C1 lateral mass screw insertion using a high entry point to avoid postoperative occipital neuralgia.

J Clin Neurosci 2013 Jan 30;20(1):162-7. Epub 2012 Oct 30.

Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 50 Ilwon-dong, Gangnam-gu, Seoul 135-710, Republic of Korea.

For the past decade, a screw-rod construct has been used commonly to stabilize the atlantoaxial joint, but the insertion of the screw through the C1 lateral mass (LM) can cause several complications. We evaluated whether using a higher screw entry point for C1 lateral mass (LM) fixation than in the standard procedure could prevent screw-induced occipital neuralgia. We enrolled 12 consecutive patients who underwent bilateral C1 LM fixation, with the modified screw insertion point at the junction of the C1 posterior arch and the midpoint of the posterior inferior portion of the C1 LM. Read More

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http://dx.doi.org/10.1016/j.jocn.2012.01.045DOI Listing
January 2013
3 Reads

Diagnosis and treatment of vertebral artery dissection caused by atlantoaxial dislocation.

CNS Neurosci Ther 2012 Oct 20;18(10):876-7. Epub 2012 Aug 20.

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http://dx.doi.org/10.1111/j.1755-5949.2012.00376.xDOI Listing
October 2012
2 Reads
3.930 Impact Factor

[Biomechanical study of atlantoaxial fixation for transverse ligament injury leading to atlantoaxial instability].

Zhonghua Yi Xue Za Zhi 2012 May;92(17):1198-200

Department of Orthopedic Surgery, First Affiliated Hospital, Shanghai Jiaotong University, Shanghai 200080, China.

Objective: To explore the three-dimensional movement of atlantoaxial joint, complete transverse ligament and cracked transverse ligament after posterior atlantoaxial fixation.

Methods: The fresh upper cervical cadaveric specimens were collected from 6 males dead from active craniocerebral injury. The average age was 39. Read More

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May 2012
6 Reads

[Treatment strategy of rotatory dislocation of atlantoaxial articulation in children].

Zhonghua Wai Ke Za Zhi 2012 Mar;50(3):247-50

Department of Orthopaedics, Wuhan General Hospital of Guangzhou Command of People's Liberation Army, Wuhan 430070, China.

Objective: To analyze appropriate strategy about treatment of rotatory dislocation of atlantoaxial articulation in children.

Methods: From March 2005 to February 2009, 36 patients with rotatory dislocation of atlantoaxial articulation were retrospectively analyzed, including 25 males and 11 females, with the average age of 7.8 years (ranged 3 - 14 years). Read More

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March 2012
5 Reads

Cervical instability presenting as thoracic pain: case report and literature review.

J Spinal Cord Med 2012 Mar;35(2):125-7

Jefferson Medical College, Philadelphia, PA, USA.

Study Design: Case report.

Objective: To report a case of cervical instability from an os odontoideum that presented as posterior thoracic pain and to present a review of the literature.

Background: Thoracic posterior paraspinal spasms and pain are common chief complaints in individuals with spinal abnormalities. Read More

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http://dx.doi.org/10.1179/1079026812Z.00000000023DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3304558PMC
March 2012
4 Reads

Traumatic atlantoaxial rotatory subluxation (TAARS) in adults: a report of two cases and literature review.

Injury 2012 Jul 4;43(7):1212-5. Epub 2012 Feb 4.

Department of Trauma and Orthopaedics, University Hospitals of Leicester, Infirmary Square, Leicester, UK.

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http://dx.doi.org/10.1016/j.injury.2012.01.013DOI Listing
July 2012
2 Reads

Progression of cervical instabilities in patients with rheumatoid arthritis 5.7 years after their first lower limb arthroplasty.

Mod Rheumatol 2012 Sep 14;22(5):743-9. Epub 2012 Jan 14.

Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65, Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.

We reviewed 101 rheumatoid arthritis (RA) patients who had undergone their first lower limb arthroplasty between 1990 and 2002. None of the patients had received immunosuppressant or biological drugs. Preoperative and follow-up cervical spine radiographs had been performed (more than 2 years after the arthroplasty). Read More

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http://dx.doi.org/10.1007/s10165-011-0584-7DOI Listing
September 2012
3 Reads

C2 nerve root sectioning in posterior atlantoaxial instrumented fusions: a structured review of literature.

World Neurosurg 2012 Dec 1;78(6):697-708. Epub 2011 Nov 1.

Neurosurgical Care, LLC, Royersford, Pennsylvania, USA.

Objective: To review published series describing C1-2 posterolateral instrumentation, comparing outcomes in patients who had and did not have C2 nerve sacrifice.

Methods: Online databases were searched for English-language articles between 1994 and April 2011 pertaining to posterior atlantoaxial instrumentation with C1 lateral mass and C2 screws. Twenty studies describing 732 patients with C2 nerve preservation and 6 studies describing 361 patients with C2 sacrifice met inclusion criteria. Read More

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http://dx.doi.org/10.1016/j.wneu.2011.10.035DOI Listing
December 2012
3 Reads

C2 nerve root sectioning in posterior C1-2 instrumented fusions.

World Neurosurg 2012 Jul 7;78(1-2):170-7. Epub 2011 Nov 7.

Department of Neurosurgery, New York University Langone Medical Center, Bellevue Hospital, New York, New York, USA.

Objective: To analyze qualitatively C2 nerve dysfunction after its transection in C1-2 posterolateral instrumented fusions.

Methods: From 2002-2010, 20 consecutive patients underwent posterolateral instrumented fusions using C1 lateral mass and C2 pars or pedicle screws, mainly for type 2 dens fractures. Screws were placed under lateral fluoroscopic guidance using standard techniques. Read More

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http://dx.doi.org/10.1016/j.wneu.2011.07.010DOI Listing
July 2012
8 Reads

C1-C2 posterior fixation: indications, technique, and results.

Orthop Clin North Am 2012 Jan;43(1):11-8, vii

Department of Orthopaedics, The Ohio State University, 4110 Cramblett Hall, Columbus, OH 43210, USA.

The atlantoaxial motion segment, which is responsible for half of the rotational motion in the cervical spine, is a complex junction of the first (C1) and second (C2) cervical vertebrae. Destabilization of this joint is multifactorial and can lead to pathologic motion with neurologic sequelae. Posterior spinal fixation of the C1-C2 articulation in the presence of instability has been well described in the literature. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00305898110011
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http://dx.doi.org/10.1016/j.ocl.2011.09.004DOI Listing
January 2012
3 Reads

Rheumatoid arthritis of the cervical spine--clinical considerations.

Bull NYU Hosp Jt Dis 2011 ;69(2):136-48

Departmentof Sports Medicine, University of Pittsburgh Medical Center, Pennsylvania, USA.

Rheumatoid arthritis (RA) is a chronic, systemic inflammatory disorder affecting multiple organ systems, joints, ligaments, and bones and commonly involves the cervical spine. Chronic synovitis may result in bony erosion and ligamentous laxity that result in instability and subluxation. Anterior atlantoaxial subluxation (AAS) is the most frequently occurring deformity, due to laxity of the primary and secondary ligamentous restraints. Read More

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February 2012
4 Reads

CT and MRI-based diagnosis of craniocervical dislocations: the role of the occipitoatlantal ligament.

Clin Orthop Relat Res 2012 Jun;470(6):1602-13

Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA.

Background: Craniocervical dislocations are rare, potentially devastating injuries. A diagnosis of craniocervical dislocations may be delayed as a result of their low incidence and paucity of diagnostic criteria based on CT and MRI. Delay in diagnosis may contribute to neurological injury from secondary displacement resulting from instability. Read More

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http://dx.doi.org/10.1007/s11999-011-2151-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3348326PMC
June 2012
7 Reads

Atlantoaxial rotatory subluxation after surgical relocation of Sprengel deformity: a case report.

J Pediatr Orthop B 2012 May;21(3):276-9

Division of Pediatric Orthopaedics, Seoul National University Children's Hospital, Seoul, Korea.

We report a case of atlantoaxial rotatory subluxation developed after scapular relocation for Sprengel deformity in a 5-year-old girl. Scapular relocation descended the scapula by 60%, and achieved a normal shoulder joint motion. However, atlantoaxial rotatory subluxation developed, probably by pulling force of the tightened anterior fibers of upper trapezius muscle. Read More

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http://dx.doi.org/10.1097/BPB.0b013e32834adb6eDOI Listing
May 2012
3 Reads

[Treatment of odontoid process fracture with pedicle screws by location through inferior and inner wall of atlas and superior and inner wall of axis].

Zhongguo Gu Shang 2011 Jul;24(7):606-8

Department of Orthopaedics, Municipal Hospital of Qingdao, Qingdao 266071, Shandong, China.

Objective: To evaluate the therapeutic effects of atlantoaxial pedicle screw in treating odontoid process fracture by location through inferior and inner wall of atlas and superior and inner wall of axis.

Methods: From June 2006 to September 2010, 12 patients with odontoid process fracture were treated with the atlantoaxial pedicle screw fixation by location through inferior and inner wall of atlas and superior and inner wall of axis. There were 8 males and 4 females, ranging in age from 18 to 62 years, with an average of 37. Read More

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July 2011
2 Reads

Acute retropharyngeal calcific tendinitis in an unusual location: a case report in a patient with rheumatoid arthritis and atlantoaxial subluxation.

Korean J Radiol 2011 Jul-Aug;12(4):504-9. Epub 2011 Jul 22.

Department of Radiology, Hanyang University Hospital, 17 Haengdang-dong, Sungdong-gu, Seoul, Korea.

Retropharyngeal calcific tendinitis is defined as inflammation of the longus colli muscle and is caused by the deposition of calcium hydroxyapatite crystals, which usually involves the superior oblique fibers of the longus colli muscle from C1-3. Diagnosis is usually made by detecting amorphous calcification and prevertebral soft tissue swelling on radiograph, CT or MRI. In this report, we introduce a case of this disease which was misdiagnosed as a retropharyngeal tuberculous abscess, or a muscle strain of the ongus colli muscle. Read More

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http://dx.doi.org/10.3348/kjr.2011.12.4.504DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3150679PMC
December 2011
2 Reads

Atlantoaxial rotary subluxation after tympanoplasty.

Otol Neurotol 2011 Sep;32(7):1108-10

Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.

Objective: To describe a case of the atlantoaxial rotary subluxation (AARS) after tympanoplasty and discuss its mechanism and management.

Patients: A 10-year-old boy.

Interventions: Cervical spine plain radiography followed by cervical traction. Read More

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http://dx.doi.org/10.1097/MAO.0b013e3182267ed4DOI Listing
September 2011
9 Reads
2 Citations
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Upper cervical manipulation combined with mobilization for the treatment of atlantoaxial osteoarthritis: a report of 10 cases.

J Manipulative Physiol Ther 2011 Feb;34(2):131-7

Department of Orthopedics, The 1st Affiliated Hospital of the General Military Hospital, Beijing, China.

Objective: This study presents the outcomes of patients with idiopathic degenerative and posttraumatic atlantoaxial osteoarthritis who were treated with upper cervical manipulation in combination with mobilization device therapy.

Clinical Features: A retrospective case review of 10 patients who were diagnosed with either degenerative or posttraumatic atlantoaxial arthritis based on histories, clinical symptoms, physical examination, and radiographic presentations was conducted at a multidisciplinary integrated clinic that used both chiropractic and orthopedic services. All 10 patients selected for this series were treated with a combination of upper cervical manipulation and mechanical mobilization device therapy. Read More

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http://linkinghub.elsevier.com/retrieve/pii/S016147541000336
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http://dx.doi.org/10.1016/j.jmpt.2010.12.005DOI Listing
February 2011
7 Reads

Extraarticular manifestations in Turkish patients with rheumatoid arthritis: impact of EAMs on the health-related quality of life in terms of disease activity, functional status, severity of pain, and social and emotional functioning.

Rheumatol Int 2012 Jun 16;32(6):1521-5. Epub 2011 Feb 16.

Ankara Numune Training and Research Hospital, Ankara, Turkey.

The aim of our study was to investigate extraarticular manifestations (EAMs) in Turkish patients with rheumatoid arthritis (RA) and also assess the impact of EAMs on various health-related quality of life (HRQoL) domains, including physical, social, emotional, mental functioning, and bodily pain. A total of 150 patients were included in the study. EAMs were identified clinically. Read More

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http://dx.doi.org/10.1007/s00296-011-1822-1DOI Listing
June 2012
9 Reads

Atlantoaxial instability and cervical cord compression in Morquio syndrome.

Arch Neurol 2010 Dec;67(12):1530

Department of Radiology, Kaohsiung Veterans General Hospital, Taiwan.

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http://dx.doi.org/10.1001/archneurol.2010.308DOI Listing
December 2010
4 Reads