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Lvov I, Grin A, Talypov A, Kordonskiy A, Tupikin A. Short-term and long-term results of odontoid screw fixation in patients with Type II and rostral Type III dens fractures. NEUROCIRUGIA (ENGLISH EDITION) 2024; 35:233-240. [PMID: 38821449 DOI: 10.1016/j.neucie.2024.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Accepted: 04/23/2024] [Indexed: 06/02/2024]
Abstract
OBJECTIVES To evaluate both the short-term and long-term outcomes of odontoid screw fixation (OSF), identifying potential risk factors for implant-related complications in patients with odontoid fractures. METHODS This is a retrospective observational cohort study. Inclusion criteria were as follows: 1) Type II fractures and rostral Type III fractures, according to the Anderson and D'Alonzo classification; 2) patients older than 15 years. Exclusion criteria were: 1) other Type III injuries; 2) osteoporosis confirmed by densitometry or a CT bone density score below 100 Hounsfield units; 3) odontoid fractures related to tumors or aneurysmal bone cysts. RESULTS In total, 56 patients were considered for the analysis of short-term results, and 26 patients were evaluated for long-term outcomes. No significant differences were observed in the preoperative imaging data and intraoperative features of OSF between patients with Type II and rostral Type III fractures. The mean operative duration was 63.9 ± 20.9 min, and the mean intraoperative blood loss was 22.1 ± 22.9 ml. Screw cut-out was identified in four patients with rostral Type III fractures (p = 0.04). The rate of screw cut-out was found to correlate with the degree of dens fragment displacement. The bone fusion rate was 95.7%. CT scans identified stable pseudarthrosis in two cases. We observed C2-C3 ankylosis in all cases following partial disc resection. One third of patients with screws placed through the anterior lip of C2 showed no C2-C3 ankylosis. A strong trend towards lateral joint ankylosis formation in patients with a median lateral mass dislocation of 11.9 mm was observed. Most SF-36 scores either matched or exceeded the corresponding normal median values in the published reference database. CONCLUSIONS OSF is a reliable treatment method of Type II and rostral Type III odontoid fractures with fragment displacement of 4 mm or less. The minimally invasive OSF through the anterior-inferior lip of C2, using monocortical screw placement and cannulated instruments, without rigid intraoperative head immobilization, is sufficient to achieve favorable clinical and fusion results. This technique reduces the risk of ankylosis in the C2-C3 segment. OSF restore the quality of life for patients with odontoid fractures to levels comparable to those of the general population norm.
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Affiliation(s)
- Ivan Lvov
- Department of Neurosurgery, Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia.
| | - Andrey Grin
- Department of Neurosurgery, Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia
| | - Aleksandr Talypov
- Department of Neurosurgery, Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia
| | - Anton Kordonskiy
- Department of Neurosurgery, Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia
| | - Aleksandr Tupikin
- Department of Neurosurgery, Sklifosovsky Research Institute for Emergency Medicine, Moscow, Russia
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Huybregts JGJ, Polak SB, Jacobs WC, Arts MP, Meyer B, Wostrack M, Butenschön VM, Osti M, Öner FC, Slooff WBM, Feller RE, Bouma GJ, Harhangi BS, Depreitere B, Nygaard ØP, Weber C, Müller K, Timothy J, Pellisé F, Rasmussen MM, van Zwet EW, Steyerberg EW, Peul WC, Vleggeert-Lankamp CLA. Surgical versus conservative treatment for odontoid fractures in older people: an international prospective comparative study. Age Ageing 2024; 53:afae189. [PMID: 39193720 PMCID: PMC11350288 DOI: 10.1093/ageing/afae189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 07/19/2024] [Indexed: 08/29/2024] Open
Abstract
BACKGROUND The optimal treatment for odontoid fractures in older people remains debated. Odontoid fractures are increasingly relevant to clinical practice due to ageing of the population. METHODS An international prospective comparative study was conducted in fifteen European centres, involving patients aged ≥55 years with type II/III odontoid fractures. The surgeon and patient jointly decided on the applied treatment. Surgical and conservative treatments were compared. Primary outcomes were Neck Disability Index (NDI) improvement, fracture union and stability at 52 weeks. Secondary outcomes were Visual Analogue Scale neck pain, Likert patient-perceived recovery and EuroQol-5D-3L at 52 weeks. Subgroup analyses considered age, type II and displaced fractures. Multivariable regression analyses adjusted for age, gender and fracture characteristics. RESULTS The study included 276 patients, of which 144 (52%) were treated surgically and 132 (48%) conservatively (mean (SD) age 77.3 (9.1) vs. 76.6 (9.7), P = 0.56). NDI improvement was largely similar between surgical and conservative treatments (mean (SE) -11 (2.4) vs. -14 (1.8), P = 0.08), as were union (86% vs. 78%, aOR 2.3, 95% CI 0.97-5.7) and stability (99% vs. 98%, aOR NA). NDI improvement did not differ between patients with union and persistent non-union (mean (SE) -13 (2.0) vs. -12 (2.8), P = 0.78). There was no difference for any of the secondary outcomes or subgroups. CONCLUSIONS Clinical outcome and fracture healing at 52 weeks were similar between treatments. Clinical outcome and fracture union were not associated. Treatments should prioritize favourable clinical over radiological outcomes.
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Affiliation(s)
- Jeroen G J Huybregts
- Department of Neurosurgery, University Neurosurgical Centre Holland, Leiden University Medical Centre, Leiden, The Netherlands
- Department of Neurosurgery, University Neurosurgical Centre Holland, Haaglanden Medical Centre, The Hague, The Netherlands
| | - Samuel B Polak
- Department of Neurosurgery, University Neurosurgical Centre Holland, Leiden University Medical Centre, Leiden, The Netherlands
- Department of Neurosurgery, University Neurosurgical Centre Holland, Haaglanden Medical Centre, The Hague, The Netherlands
| | - Wilco C Jacobs
- Department of Neurosurgical Research, The Health Scientist, The Hague, The Netherlands
| | - Mark P Arts
- Department of Neurosurgery, University Neurosurgical Centre Holland, Haaglanden Medical Centre, The Hague, The Netherlands
| | - Bernhard Meyer
- Department of Neurosurgery, School of Medicine, Technical University Munich, Munchen, Germany
| | - Maria Wostrack
- Department of Neurosurgery, School of Medicine, Technical University Munich, Munchen, Germany
| | - Vicki M Butenschön
- Department of Neurosurgery, School of Medicine, Technical University Munich, Munchen, Germany
| | - Michael Osti
- Department of Trauma Surgery and Sports Traumatology, Academic Hospital Feldkirch, Feldkirch, Austria
| | - F Cumhur Öner
- Departments of Orthopaedics/Neurosurgery, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Willem-Bart M Slooff
- Departments of Orthopaedics/Neurosurgery, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Ricardo E Feller
- Department of Neurosurgery, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - Gert-Joan Bouma
- Department of Neurosurgery, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - Biswadjiet S Harhangi
- Department of Neurosurgery, Erasmus Medical Centre Rotterdam, Rotterdam, The Netherlands
- Department of Neurosurgery, Park Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Bart Depreitere
- Department of Neurosurgery, University Hospitals Leuven, Leuven, Belgium
| | - Øystein P Nygaard
- Department of Neurosurgery, St Olavs University Hospital, Trondheim, Norway
| | - Clemens Weber
- Department of Neurosurgery, Stavanger University Hospital, Stavanger, Norway
- Department of Quality and Health Technology, University of Stavanger, Stavanger, Norway
| | - Kay Müller
- Department of Neurosurgery, University Hospital North Norway, Tromsø, Norway
| | - Jake Timothy
- Department of Neurosurgery, University of Leeds, UK
| | - Ferran Pellisé
- Spine Unit, Vall d’Hebron University Hospital, Barcelona, Spain
| | | | - Erik W van Zwet
- Department of Biomedical Data Sciences, Leiden University Medical Centre, Leiden, The Netherlands
| | - Ewout W Steyerberg
- Department of Biomedical Data Sciences, Leiden University Medical Centre, Leiden, The Netherlands
| | - Wilco C Peul
- Department of Neurosurgery, University Neurosurgical Centre Holland, Leiden University Medical Centre, Leiden, The Netherlands
- Department of Neurosurgery, University Neurosurgical Centre Holland, Haaglanden Medical Centre, The Hague, The Netherlands
| | - Carmen L A Vleggeert-Lankamp
- Department of Neurosurgery, University Neurosurgical Centre Holland, Leiden University Medical Centre, Leiden, The Netherlands
- Department of Neurosurgery, Spaarne Gasthuis Hoofddorp, Hoofddorp, The Netherlands
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Tang C, Wen X, Zhang Y, Liao YH, Huang XM, Tang Q, Qiu H, Yang SZ, Zhong DJ, Chu TW. Unilateral high-riding vertebral artery is associated with asymmetric morphological changes of the atlantoaxial joint: a novel risk factor for atlantoaxial osteoarthritis. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024; 33:2322-2331. [PMID: 38676728 DOI: 10.1007/s00586-024-08285-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/10/2024] [Accepted: 04/18/2024] [Indexed: 04/29/2024]
Abstract
PURPOSE This study aimed to investigate the association between unilateral high-riding vertebral artery (HRVA) and morphological changes in the atlantoaxial joint (AAJ) and to determine whether unilateral HRVA is a risk factor for atlantoaxial osteoarthritis (AAOA). METHODS We conducted a retrospective analysis of 2496 patients admitted to our medical center between January 2020 and December 2022 who underwent CT imaging of the cervical spine. Two hundred and seventy-two patients with unilateral HRVA (HRVA group) were identified and a respective 2:1 age- and sex-matched control group without HRVA was built. Morphological parameters, including C2 lateral mass settlement (C2 LMS), C1/2 coronal inclination (C1/2 CI), lateral atlanto-dental interval (LADI), and C1/2 relative rotation angle (C1/2 RRA) were measured. The degree of AAOA was recorded. Risk factors associated with AAOA were identified using univariate and multivariable logistic regression analyses. RESULTS The study included 61.4% women, and the overall average age of the study population was 48.7 years. The morphological parameters (C2 LMS, C1/2 CI, and LADI) in AAJ were asymmetric between the HRVA and the non-HRVA sides in the HRVA group (p < 0.001). These differences in parameters (d-C2 LMS, d-C1/2 CI, and d-LADI) between the HRVA and the non-HRVA sides, and C1/2 RRA were significantly larger than those in the control group. Eighty-three of 816 patients (10.2%) with AAOA had larger values of d-C2 LMS, d-C1/2 CI, d-LADI, and C1/2 RRA compared with the patients without AAOA (p < 0.05). The multivariable logistic regression analysis indicated that unilateral HRVA [adjusted odds ratio (OR) = 2.6, 95% CI: 1.1-6.3, p = 0.029], age in the sixth decade or older (adjusted OR = 30.2, 95% CI: 16.1-56.9, p < 0.001), women (adjusted OR = 2.1, 95% CI: 1.0-5.6, P = 0.034) were independent risk factors for AAOA. CONCLUSION Unilateral HRVA was associated with asymmetric morphological changes of nonuniform settlement of C2 lateral mass, lateral slip of atlas, and atlantoaxial rotation displacement. Besides age ≥ 60 years and females, unilateral HRVA is an independent risk factor for AAOA.
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Affiliation(s)
- Chao Tang
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China
- Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, No. 25 Taiping Street, Luzhou, China
| | - Xuan Wen
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China
| | - Ying Zhang
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China
| | - Ye Hui Liao
- Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, No. 25 Taiping Street, Luzhou, China
| | - Xian Ming Huang
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China
| | - Qiang Tang
- Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, No. 25 Taiping Street, Luzhou, China
| | - Hao Qiu
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China
| | - Si Zhen Yang
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China
| | - De Jun Zhong
- Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, No. 25 Taiping Street, Luzhou, China.
| | - Tong Wei Chu
- Department of Orthopedics, The Second Affiliated Hospital (Xinqiao Hospital) of Army Medical University, No. 83, Xinqiao Main Street, Chongqing, China.
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Huang L, Chen W, Xu H, Qin H, Jiang H. Odontoid incidence: a constant cervical anatomical feature evident in standing plain radiographs and supine magnetic resonance images. J Orthop Surg Res 2024; 19:63. [PMID: 38218851 PMCID: PMC10787454 DOI: 10.1186/s13018-024-04542-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 01/08/2024] [Indexed: 01/15/2024] Open
Abstract
OBJECTIVE To assess whether there is a difference between measurements of odontoid incidence (OI) and other cervical sagittal parameters by X-ray radiography and those by supine magnetic resonance imaging (MRI). METHODS Standing X-ray and supine MRI images of 42 healthy subjects were retrospectively analyzed. Surgimap software was employed to measure cervical sagittal parameters including OI, odontoid tilt (OT), C2 slope (C2S), C0-2 angle, C2-7 angle, T1 slope (T1S) and T1S-cervical lordosis (CL). Paired samples t-test was applied to determine the difference between parameters measured by standing X-ray and those by supine MRI. In addition, the statistical correlation between the parameters were compared. The prediction of CL was performed and validated using the formula CL = 0.36 × OI - 0.67 × OT - 0.69 × T1S. RESULTS Significant correlations and differences were found between cervical sagittal parameters determined by X-ray and those by MRI. OI was verified to be a constant anatomic parameter and the formula CL = 0.36 × OI - 0.67 × OT - 0.69 × T1S can be used to predict CL in cervical sagittal parameters. CONCLUSIONS OI is verified as a constant anatomic parameter, demonstrating the necessity of a combined assessment of cervical sagittal balance by using standing X-ray and supine MRI. The formula CL = 0.36 × OI - 0.67 × OT - 0.69 × T1S can be applied to predict CL in cervical sagittal parameters.
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Affiliation(s)
- Longao Huang
- Department of Spine Surgery, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Weiyou Chen
- Department of Spine Surgery, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Hongyuan Xu
- Department of Spine Surgery, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Hongyu Qin
- Department of Spine Surgery, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Hua Jiang
- Department of Spine Surgery, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, 530021, Guangxi Zhuang Autonomous Region, China.
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Müller JU, Nowak S, Matthes M, Pillich DT, Schroeder HWS, Müller J. Biomechanical comparison of two different compression screws for the treatment of odontoid fractures in human dens axis specimen. Clin Biomech (Bristol, Avon) 2024; 111:106162. [PMID: 38159327 DOI: 10.1016/j.clinbiomech.2023.106162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 12/13/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND Lag screw osteosynthesis for odontoid fractures has a high rate of pseudoarthrosis, especially in elderly patients. Besides biomechanical properties of the different screw types, insufficient fragment compression or unnoticed screw stripping may be the main causing factors for this adverse event. The aim of the study was to compare two screws in clinical use with different design principles in terms of compression force and stability against screw stripping. METHODS Twelve human cadaveric C2 vertebral bodies were considered. Bone density was determined. The specimens were matched according to bone density and randomly assigned to two experimental groups. An odontoid fracture was induced, which were fixed either with a 3.5 mm standard compression screw or with a 5 mm sleeve nut screw. Both screws are certified for the treatment of odontoid fractures. The bone samples were fixed in a measuring device. The screwdriver was driven mechanically. The tests were analyzed for peak interfragmentary compression and screw-in torque with a frequency of 20 Hz. FINDINGS The maximum fragment compression was significantly higher with screw with sleeve nut at 346.13(SD ±72.35) N compared with classic compression screw at 162.68(SD ±114.13) N (p = 0.025). Screw stripping occurred significantly earlier in classic compression screw at 255.5(SD ±192.0)° rotation after reaching maximum compression than in screw with sleeve nut at 1005.2(SD ±341.1)° (p = 0.0039). INTERPRETATION Screw with sleeve nut achieves greater fragment compression and is more robust to screw stripping compared to classic compression screw. Whether the better biomechanical properties lead to a reduction of pseudoarthrosis has to be proven in clinical studies.
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Affiliation(s)
- Jan-Uwe Müller
- Department of Neurosurgery, University Medicine, Greifswald, Germany.
| | - Stephan Nowak
- Department of Neurosurgery, University Medicine, Greifswald, Germany
| | - Marc Matthes
- Department of Neurosurgery, University Medicine, Greifswald, Germany
| | | | | | - Jonas Müller
- Department of Neurosurgery, University Medicine, Greifswald, Germany
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Jo WR, Lee CY, Kwon SM, Kim CH, Kwon MY, Kim JH, Ko YS. Does the Surgical Approach Matter in Treating Odontoid Fractures? A Comparison of Mechanical Complication Rates Between Anterior Versus Posterior Surgical Approaches: A Meta-Analysis and Systematic Review. Korean J Neurotrauma 2023; 19:409-421. [PMID: 38222835 PMCID: PMC10782099 DOI: 10.13004/kjnt.2023.19.e64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/06/2023] [Accepted: 12/08/2023] [Indexed: 01/16/2024] Open
Abstract
Objective Odontoid fractures are treated surgically through the anterior or posterior approach. Each surgical approach has its advantages and disadvantages, so the preferred approach remains debatable. There are few meta-analyses or systemic reviews on the mechanical complications of surgical treatment for odontoid fractures. This meta-analysis aimed to compare the operation-related morbidity, including mechanical complications, and mortality of patients with odontoid fractures, treated via the anterior or posterior approach. Methods A systematic search was performed on PubMed/Medline, Embase, and the Cochrane Library for the studies up to October 2023 on the complication rate of the surgical treatment of odontoid fractures, related to the surgical approach. The risk ratios (RR) with the 95% confidence intervals (CIs) were pooled to assess the mechanical complication rates, other complications, revision surgery, and mortality, depending on the surgical approach. Results A total of 1,519 studies were retrieved using the search strategy, and 782 patients from 15 articles were included in this meta-analysis. Mechanical complications were significantly more frequent in the anterior surgical group with low heterogeneity. The incidences of fracture nonunion and revision surgery were also higher in the anterior surgery group. However, there was no significant difference in systemic complications and mortality rates between the two groups. Conclusion The posterior approach was more advantageous than the anterior approach in terms of mechanical complications, fusion rates, and incidence of revision surgery. However, further studies, should be performed to strengthen these results.
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Affiliation(s)
- Woong Rae Jo
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Chang-Young Lee
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Sae Min Kwon
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Chang-Hyun Kim
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Min-Yong Kwon
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Jae Hyun Kim
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Young San Ko
- Department of Neurosurgery, Keimyung University Dongsan Hospital, Daegu, Korea
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Lenga P, Issa M, Krull L, Kiening K, Unterberg AW, Schneider T, Oskouian RJ, Chapman JR, Ishak B. Radiological Features in Type II Odontoid Fractures in Older Adults After High- and Low-Energy Trauma. Global Spine J 2023; 13:2471-2478. [PMID: 35344677 PMCID: PMC10538308 DOI: 10.1177/21925682221088215] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Retrospective study. OBJECTIVES Although type II odontoid fractures mainly occur due to high-energy trauma (HET), the number of odontoid type II fractures after low-energy trauma (LET) in the elderly is on the rise. However, there is a paucity of conclusive evidence on the relationship between trauma mechanism and cervical spine alignment in the elderly population. Consequently, we examined cervical alignment and osteoporotic and osteoarthritic patterns in elderly individuals (aged ≥65 years) with type II odontoid fractures. METHODS We retrospectively assessed cervical spine alignment in 76 elderly individuals who experienced type II odontoid fractures after HET (n = 36) and LET (n = 40) between 2005 and 2020. Osteoporotic and osteoarthritic changes on computed tomography and cervical alignment parameters on sagittal plane radiographs were examined. RESULTS Moderate and severe osteoporosis of the dens-body junction and osteoarthritis of the atlanto-odontoid joint were more prevalent in the LET than the HET group (P<.005). The anterior atlantodental interval (ADI) was significantly smaller in the LET group than in the HET group (.7 [.7] millimeter vs 1.2 [.8] mm; P=.003). An ADI equal 0 mm indicative for anterior fusion of C1/C2 was present in 37.5% of patients of the LET group. The C0-C2 angle, C1-C2 lordosis, and C2-C7 sagittal vertical axis were significantly different (HET vs LET: 33.2 [7.2]° vs 41.6 [11.4]°, P=.005; 28.1 [7.0]° vs 34.0 [8.0]°, P=.002; and 16.1 [11.1] millimeter vs 27.1 [12.4] mm, P=.008; respectively). CONCLUSION Significantly higher rates of osteoporotic and degenerative changes were observed after LET. Furthermore, previous cervical malalignment represents a risk factor for type II odontoid fractures after LET.
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Affiliation(s)
- Pavlina Lenga
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Mohammed Issa
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Lennart Krull
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Karl Kiening
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Till Schneider
- Department of Neuroradiology, Heidelberg University Hospital, Heidelberg, Germany
| | - Rod J. Oskouian
- Division of Complex Spine Swedish Neuroscience Institute, Seattle, WA, USA
| | - Jens R. Chapman
- Division of Complex Spine Swedish Neuroscience Institute, Seattle, WA, USA
| | - Basem Ishak
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
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8
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Takahata M, Hyakkan R, Oshima S, Oda I, Kanayama M, Hyakumachi T, Fujita R, Endo T, Kajino T, Iwasaki N. Cervical Myelopathy Caused by Non-Rheumatic Retro-Odontoid Pseudotumor: An Investigation of Underlying Mechanisms and Optimal Surgical Strategy. Global Spine J 2023; 13:2053-2062. [PMID: 35000408 PMCID: PMC10556925 DOI: 10.1177/21925682211069542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
STUDY DESIGN Retrospective case-control study. OBJECTIVE This study aimed to identify the underlying pathologies of non-rheumatic retro-odontoid pseudotumors (NRPs), which would help establish an appropriate surgical strategy for myelopathy caused by NRP. METHODS We identified 35 patients with myelopathy caused by NRP who underwent surgery between 2006 and 2017. An age- and sex-matched control group of 70 subjects was selected from patients with degenerative cervical myelopathy. Radiographic risk factors for NRP were compared between cases and controls. We also assessed surgical outcomes following occipital-cervical (O-C) fusion, atlantoaxial (C1-2) fusion, or C1 laminectomy. RESULTS Patients with NRP had significantly lower C1 sagittal inner diameter, C2-7 range of motion (ROM), C2-7 Cobb angle, and C7 tilt, as well as significantly higher C1-2 ROM, atlantodental interval (ADI), and C1-2 to O-C7 ROM ratio. Multivariate regression analysis revealed that ADI, C2-7 ROM, and C7 tilt were independent risk factors for NRP. Neurological recovery and pseudotumor size reduction were comparable among surgical procedures, whereas post-operative cervical spine function was significantly lower in the O-C fusion group than in the other groups. CONCLUSION Non-rheumatic retro-odontoid pseudotumor was associated with an increase in ADI, suggesting that spinal arthrodesis surgery is a reasonable strategy for NRP. C1-2 fusion is preferable over O-C fusion because of the high prevalence of ankylosis in the subaxial cervical spine. Given that 29% of patients with NRP have C1 hypoplasia, such cases can be treated by posterior decompression alone. Our study highlights the need to select appropriate surgical procedures based on the underlying pathology in each case.
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Affiliation(s)
- Masahiko Takahata
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
- Hokkaido Spine Study Group, Sapporo, Japan
| | - Ryota Hyakkan
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
- Hokkaido Spine Study Group, Sapporo, Japan
| | - Shigeki Oshima
- The Spine Center, Hakodate Central General Hospital, Hakodate, Japan
| | - Itaru Oda
- Hokkaido Spine Study Group, Sapporo, Japan
- The Spine Center, Hakodate Central General Hospital, Hakodate, Japan
| | - Masahiro Kanayama
- Hokkaido Spine Study Group, Sapporo, Japan
- The Spine Center, Hakodate Central General Hospital, Hakodate, Japan
| | - Takahiko Hyakumachi
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Ryo Fujita
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
- Hokkaido Spine Study Group, Sapporo, Japan
| | - Tsutomu Endo
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
- Hokkaido Spine Study Group, Sapporo, Japan
| | - Tomomichi Kajino
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
- Hokkaido Spine Study Group, Sapporo, Japan
| | - Norimasa Iwasaki
- Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Tang C, Liao YH, Wang Q, Tang Q, Ma F, Cai CH, Xu SC, Leng YB, Chu TW, Zhong DJ. The association between unilateral high-riding vertebral artery and atlantoaxial joint morphology: a multi-slice spiral computed tomography study of 396 patients and a finite element analysis. Spine J 2023; 23:1054-1067. [PMID: 36868381 DOI: 10.1016/j.spinee.2023.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/14/2023] [Accepted: 02/23/2023] [Indexed: 03/05/2023]
Abstract
BACKGROUND CONTEXT A high-riding vertebral artery (HRVA) can deviate too medially, too posteriorly, or too superiorly to allow the safe insertion of screws. However, it is unknown whether the presence of a HRVA is associated with morphological changes of the atlantoaxial joint. PURPOSE To investigate the association between HRVA and atlantoaxial joint morphology in patients with and without HRVA. STUDY DESIGN A retrospective case-control study and finite element (FE) analysis. PATIENT SAMPLE A total of 396 patients with cervical spondylosis underwent multi-slice spiral computed tomography (MSCT) of cervical spine at our institutions from 2020 to 2022. OUTCOME MEASURES A series of atlantoaxial joint morphological parameters, including C2 lateral mass settlement (C2 LMS), C1-2 sagittal joint inclination (C1-2 SI), C1-2 coronal joint inclination (C1-2 CI), atlanto-dental interval (ADI), lateral atlanto-dental interval (LADI), and C1-2 relative rotation angle (C1-2 RRA) were measured, and lateral atlantoaxial joints osteoarthritis (LAJs-OA) was recorded. The stress distribution on the C2 facet surface under different torques of flexion-extension, lateral bending, and axial rotation was analyzed by FE models. A 2-Nm moment was applied to all models to determine the range of motion (ROM). METHODS A total of 132 consecutive cervical spondylosis patients with unilateral HRVA were enrolled in the HRVA group, and 264 patients without HRVA matched for age and sex were enrolled in the normal (NL) group. Atlantoaxial joint morphological parameters were compared between two sides of C2 lateral mass within HRVA or NL group, and between HRVA and NL groups. A 48-year-old woman with cervical spondylosis without HRVA was selected for cervical MSCT. A three-dimensional (3D) FE intact model of the normal upper cervical spine (C0-C2) was created. We established the HRVA model by simulating atlantoaxial morphological changes of unilateral HRVA with FE method. RESULTS The C2 LMS was significantly smaller on the HRVA side than that on the non-HRVA side in the HRVA group, but C1-2 SI, C1-2 CI, and LADI on HRVA side were significantly larger than those on non-HRVA side. There was no significant difference between left and right sides in the NL group. The difference in C2 LMS (d-C2 LMS) between HRVA side and non-HRVA side in the HRVA group was larger than that in the NL group (P < 0.05). Meanwhile, the differences in C1-2 SI (d-C1/2 SI), C1-2 CI (d-C1/2 CI), and LADI (d-LADI) in the HRVA group were significantly larger than those in the NL group. The C1-2 RRA in the HRVA group was significantly larger than that in the NL group. Pearson correlations showed that d-C1/2 SI, d-C1/2 CI, and d-LADI were positively associated with d-C2 LMS (r=0.428, 0.649, 0.498, respectively, p<.05 for all). The incidence of LAJs-OA in the HRVA group (27.3%) was significantly larger than that in the NL group (11.7%). Compared with the normal model, the ROM of C1-2 segment declined in all postures of the HRVA FE model. We found a larger distribution of stress on the C2 lateral mass surface of the HRVA side under different moment conditions. CONCLUSIONS We suggest that HRVA affects the integrity of the C2 lateral mass. This change in patients with unilateral HRVA is associated with the nonuniform settlement of the lateral mass and an increase in the lateral mass inclination, which may further affect the degeneration of the atlantoaxial joint because of the stress concentration on the C2 lateral mass surface.
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Affiliation(s)
- Chao Tang
- Department of Orthopedics, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing city, China; Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Ye Hui Liao
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Qing Wang
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Qiang Tang
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Fei Ma
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Chen Hui Cai
- Department of Orthopedics, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing city, China
| | - Shi Cai Xu
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Ye Bo Leng
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China
| | - Tong Wei Chu
- Department of Orthopedics, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing city, China.
| | - De Jun Zhong
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou city, Sichuan province, China.
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Tinner C, Aregger FC, Deml MC. Transoral unilateral lag screw osteosynthesis for coronal split fracture of the lateral mass of the atlas - case report, operative technique and review of the literature. BRAIN & SPINE 2023; 3:101761. [PMID: 38020987 PMCID: PMC10668072 DOI: 10.1016/j.bas.2023.101761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/28/2023] [Accepted: 06/07/2023] [Indexed: 12/01/2023]
Abstract
Introduction Atlas ring fractures, which account for 1.3% of all spinal fractures, are predominantly managed conservatively. However, in certain cases, surgical treatment may be necessary depending on the type of fracture, degree of comminution, fracture location, and associated ligamentous injuries. Surgical stabilization frequently results in a posterior C1-2 or C0-2 fusion, which restricts movement, particularly craniocervical rotation. Coronal split fractures of the lateral mass need to be reduced and fixed due to dislocation, instability and secondary osteoarthritis. The preferred treatment approach involves internal fixation of the reduced fracture fragments, while avoiding restriction of the upper cervical spine's range of motion (ROM). Research question Is unilateral anterior transoral lag screw for treatment of unstable coronal split fracture of lateral mass of the atlas feasible and a safe treatment option? Case Report Material and Methods We report on a 55-year-old female suffering from polytrauma with multiple spinal and extremity injuries. Results A coronal split fracture of the lateral mass of the atlas was treated minimally invasive with a transoral lag screw technique to reduce and fix the fracture that has a tendency for fracture gap widening. Stable fixation and fracture union and thus restoration of function was achieved. Discussion and conclusion Transoral lag screw osteosynthesis for coronal split fracture of the lateral mass of the atlas is a potential treatment option in selected cases to preserve mobility in the upper cervical spine after spinal trauma.
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Affiliation(s)
- Christian Tinner
- Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, Switzerland
| | - Fabian Cedric Aregger
- Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, Switzerland
| | - Moritz Caspar Deml
- Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, University of Bern, Switzerland
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Li G, Wang Q. Analysis of the clinical characteristics of adult patients with hangman's fractures: A retrospective study based on multicenter clinical data. Front Surg 2023; 10:949987. [PMID: 37082367 PMCID: PMC10110880 DOI: 10.3389/fsurg.2023.949987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 03/24/2023] [Indexed: 04/09/2023] Open
Abstract
BackgroundThere are few reports on the clinical characteristics of adult patients with hangman's fractures.MethodsThe clinical data of adult patients were collected from the hangman's fracture database of 7 medical centers. Data on patients who met the inclusion and exclusion criteria were retrospectively analyzed. Data, including gender, age, mechanism of injury, fracture classification, and treatment, were statistically analyzed.ResultsA total of 216 eligible patients (160 males and 56 females, with a mean age of 49.7 years) were selected. There was no statistically significant difference in gender distribution of different age groups. The male-to-female ratio was similar in the young group (18–44 years) and the middle-aged group (45–64 years) (both about 3:1) but decreased in the elderly group (65 years and above) (about 2:1). Overall, high-energy injury was the main mechanism of injury. There was a statistically significant difference in the percentage of patients with high-energy injury in various age groups (the highest in the young group, and the lowest in the elderly group). Overall, unstable fracture was the main fracture type, with a higher proportion in the young and elderly groups than that in the middle-aged group, but there was no statistically significant difference. From the perspective of treatment options, the percentage of patients receiving surgery was higher in the young and elderly groups than that in the middle-aged group.ConclusionHangman's fracture is predominant in males of all age groups, with high-energy injury as the main mechanism of injury. Unstable fracture is common fracture type. The percentage of patients receiving surgery in the young and elderly groups is higher than that in the middle-aged group, which may be correlated with the high incidence of unstable fracture and the life characteristics of the patients in the young and elderly age groups.
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Spiegl UJA, Keil H, Krause J, Osterhoff G, Scheyerer MJ, Schnake KJ, Perl M. Combined Odontoid (C2) and Atlas (C1) Fractures in Geriatric Patients: A Systematic Review and Treatment Recommendation. Global Spine J 2023; 13:22S-28S. [PMID: 37084349 PMCID: PMC10177310 DOI: 10.1177/21925682221127951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/23/2023] Open
Abstract
STUDY DESIGN Systematic review. OBJECTIVE The aim of this study was to conduct a systematic overview of the pathogenesis and the treatment options of combined odontoid and atlas fractures in geriatric patients. METHODS This review is based on articles retrieved by a systematic search in the PubMed and Web of Science databases for articles published until February 2021 dealing with combination fractures of C1 and C2 in geriatric patients. RESULTS Altogether, 438 articles were retrieved from the literature search. A total of 430 articles were excluded. The remaining eight original articles were included in this systematic review depicting the topics pathogenesis, non-operative treatment, posterior approach, and anterior approach. The overall level of evidence of the studies is low. CONCLUSION Combined odontoid and atlas fractures in the geriatric population are commonly caused by simple falls and seem to be associated with atlanto-odontoid osteoarthritis. Non-operative treatment with a cervical orthosis is a feasible treatment option in the majority of patients with stable C2 fractures. In case of surgery posterior C1 and C 2 stabilization and anterior triple or quadruple screw fixation are possible techniques. Some patients may also deserve an occipito-cervical fusion. A possible treatment algorithm is proposed.
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Affiliation(s)
- Ulrich J A Spiegl
- Department of Orthopaedics, Trauma Surgery and Plastic Surgery, University of Leipzig, Leipzig, Germany
| | - Holger Keil
- Department of Trauma and Orthopedic Surgery, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Johannes Krause
- Department of Trauma and Orthopedic Surgery, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
| | - Georg Osterhoff
- Department of Orthopaedics, Trauma Surgery and Plastic Surgery, University of Leipzig, Leipzig, Germany
| | - Max J Scheyerer
- Department of Orthopedics and Trauma Surgery, University hospital, Duesseldorf, Germany
| | - Klaus John Schnake
- Center for Spinal and Scoliosis Surgery, Malteser Waldkrankenhaus St. Marien gGmbH, Erlangen, Germany
- Department of Orthopedics and Traumatology, Paracelsus Private Medical University Nuremberg, Nuremberg, Germany
| | - Mario Perl
- Department of Trauma and Orthopedic Surgery, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany
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Wang Y, Song C, Ji Y, Xia J, Chen C, Haque M, Zhuang J, Zhou C, Zu J, Li X, Yan J. Clinical and Radiographic Features of the Atlantoaxial Dislocation Associated With Kashin-Beck Disease. World Neurosurg 2023; 171:e1-e7. [PMID: 36049725 DOI: 10.1016/j.wneu.2022.08.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 01/25/2023]
Abstract
OBJECTIVES Keshin-Beck disease (KBD) is a particular type of osteoarthritis that affects many joints. However, the deformity of atlantoaxial joint has been rarely reported in KBD, and therefore its clinical and radiograph features have not been identified. METHODS We reviewed data in 14 patients who were diagnosed with atlantoaxial dislocation (AAD) in KBD at our institution. The demographic data, clinical history, imaging data, operative data, and Japanese Orthopaedic Association score were collected for evaluation. RESULTS The mean age at presentation was 50 ± 1.7 years old. The most common features of AAD in KBD were the osteoarthritis, characterized by hypertrophic dens and anterior arch of the atlas. The average inner anteroposterior diameter (IAPD) of C1 was 28 ± 3.5 mm and the average spinal canal diameter was 14 ± 3.3 mm, which were respectively lower than the control level. Five patients had severe C1 stenosis (IAPD < 26mm). Separated odontoid process, like os odontoideum, was seen 9 patients. The tip of dens fused to C1 was observed in 4 patients; 12 patients had high-riding vertebral artery; and 5 patients had severe C1 stenosis, and they underwent C1 laminectomy with C1-C2 interarticular fusion or occipital-cervical fusion. All the patients displayed neurologic improvement after surgery. CONCLUSIONS The atlantoaxial level could be affected by KBD, which may lead to typical abnormalities and cause AAD. A C1 laminectomy with an C1-C2 interarticular fusion or occipital-cervical fusion is recommended for the patient with severe stenosis.
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Affiliation(s)
- Yufu Wang
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Chengchao Song
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Ye Ji
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Jingjun Xia
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Chao Chen
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Moinul Haque
- College of Medicine and Health, University College Cork, Cork, Ireland
| | - Jinpeng Zhuang
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Changlong Zhou
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Jianing Zu
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Xuefeng Li
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China
| | - Jinglong Yan
- Department of Orthopedic Surgery, Harbin Medical University-the Second Affiliated Hospital, Harbin, China.
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Hirata H, Morimoto T, Tsukamoto M, Yoshihara T, Kobayashi T, Takashima S, Mawatari M. Letter to the Editor. Odontoid fractures using posterior C1-2 fixation without fusion. J Neurosurg Spine 2023; 38:294. [PMID: 36242569 DOI: 10.3171/2022.8.spine22872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Güvercin Y, Yaylacı M, Dizdar A, Kanat A, Uzun Yaylacı E, Ay S, Abdioğlu AA, Şen A. Biomechanical analysis of odontoid and transverse atlantal ligament in humans with ponticulus posticus variation under different loading conditions: Finite element study. Injury 2022; 53:3879-3886. [PMID: 36229242 DOI: 10.1016/j.injury.2022.10.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/22/2022] [Accepted: 10/05/2022] [Indexed: 11/05/2022]
Abstract
PURPOSE Ponticulus posticus (PP) is a variation of the bone bridge that appears in the first cervical vertebra and through which the vertebral artery passes. Odontoid fractures are common spinal bone fractures in older people. This study aims to investigate the effect of neck movements on the odontoid and transverse atlantal ligament (TAL) of people with PP variation from a biomechanical view. METHOD C1, C2, and C3 vertebrae of the occipital bone were analyzed using the finite element method (FEM). In this study, solid models were created with the help of normal (N), incomplete (IC), and asymmetric complete (AC) PP tomography images. The necessary elements for the models were assigned, and the material properties were defined for the elements. As boundary conditions, models were fixed from the C3 vertebra, and 74 N loading was applied from the occipital bone. Stress and deformation values in the odontoid and transverse atlantal ligament were obtained by applying 1.8 Nm moment in flexion, extension, bending, and axial rotation directions. RESULTS The stress and deformation values of all three models in odontoid and TAL were obtained, and numerical results were evaluated. In all models, stress and deformation values were obtained in decreasing order in rotation, bending, extension, and flexion movements. The highest stress and strain values were obtained in AC and the lowest values were obtained in N. In all movements of the three models, the stress and deformation values obtained in the TAL were lower than in the odontoid. CONCLUSION The greatest stresses and deformations obtained in spines (AC) with PP were found in the odontoid. This may help explain the pathogenesis of odontoid fractures in older people. First, this study explains the mechanism of the formation of neck trauma in people with PP and the need for a more careful evaluation of the direction of impact. Secondly, the study reveals that the rotational motion of the neck independent of PP has more negative effects on the odontoid.
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Affiliation(s)
- Yılmaz Güvercin
- Trabzon Kanuni Training and Research Hospital, Department of Orthopaed & Traumatol, 61000 Trabzon, Turkey.
| | - Murat Yaylacı
- Recep Tayyip Erdogan University, Biomedical Engineering MSc Program, 53100 Rize, Turkey; Recep Tayyip Erdogan University, Department of Civil Engineering, 53100 Rize, Turkey.
| | - Ayberk Dizdar
- Kocaeli University, Department of Biomedical Engineering, 41380 Kocaeli, Turkey.
| | - Ayhan Kanat
- Recep Tayyip Erdogan University, Department of Neurosurgery, 53100 Rize, Turkey.
| | - Ecren Uzun Yaylacı
- Karadeniz Technical University, Surmene Faculty of Marine Science, 61530 Trabzon, Turkey.
| | - Sevil Ay
- Department of Civil Engineering, Artvin Coruh University, 08100 Artvin, Turkey.
| | | | - Ahmet Şen
- University of Health Sciences, Trabzon Kanuni Training and Research Hospital, Anesthesiaa and Reanimation Department, 61100 Trabzon, Turkey.
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Suga Y, Shigematsu H, Tanaka M, Okuda A, Kawasaki S, Yamamoto Y, Ikejiri M, Asai H, Fukushima H, Tanaka Y. Factors associated with the increased risk of atlantoaxial osteoarthritis: a retrospective study. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:3418-3425. [PMID: 36260133 DOI: 10.1007/s00586-022-07414-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 08/29/2022] [Accepted: 09/29/2022] [Indexed: 11/07/2022]
Abstract
Purpose Atlantodens osteoarthritis and atlantoaxial osteoarthritis cause neck pain and suboccipital headaches. Currently, knowledge on the risk factors for atlantoaxial osteoarthritis is lacking. This study aimed to investigate the factors related to the increased risk of atlantoaxial osteoarthritis. Methods We analyzed computed tomography (CT) images of the upper cervical spine of 1266 adult trauma patients for whom upper cervical spine CT was performed at our hospital between 2014 and 2019. The degree of atlantoaxial osteoarthritis was quantified as none-to-mild (not having osteoarthritis) or moderate-to-severe (having osteoarthritis). Risk factors associated with atlantoaxial osteoarthritis were identified using univariate and multivariable logistic regression analyses. Results The study group included 69.4% men, and the overall average age of the study population was 54.9 ± 20.4 years. The following factors were independently and significantly associated with atlantoaxial osteoarthritis in the multivariable logistic regression analysis: age in the sixth decade or older (odds ratio [OR], 20.5; 95% confidence interval [CI], 6.2‒67.2, p < 0.001), having calcific synovitis (OR, 4.9; 95% CI, 2.4‒9.9, p < 0.001), women sex (OR, 3.3; 95% CI, 1.9‒5.7, p = 0.002), and not having atlantodens osteoarthritis (OR, 2.1; 95% CI, 1.2‒3.8, p = 0.014). Conclusion In the multivariable logistic regression analysis, age in the sixth decade or older, calcification of the transverse ligament, being women, and not having atlantodens osteoarthritis were found to be significantly associated with atlantoaxial osteoarthritis. Delayed diagnosis and treatment can be avoided by focusing on these risk factors.
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Affiliation(s)
- Yuma Suga
- Department of Orthopedics and Surgery, Nara Medical University, KashiharaNara, 6348522, Japan
| | - Hideki Shigematsu
- Department of Orthopedics and Surgery, Nara Medical University, KashiharaNara, 6348522, Japan.
| | - Masato Tanaka
- Department of Orthopedic Surgery, Otemae Hospital, Osaka, Japan
| | - Akinori Okuda
- Department of Emergency and Critical Care Center, Nara Medical University, Nara, Japan
| | - Sachiko Kawasaki
- Department of Orthopedics and Surgery, Nara Medical University, KashiharaNara, 6348522, Japan
| | - Yusuke Yamamoto
- Department of Emergency and Critical Care Center, Nara Medical University, Nara, Japan
| | - Masaki Ikejiri
- Department of Orthopedics and Surgery, Nara Medical University, KashiharaNara, 6348522, Japan
| | - Hideki Asai
- Department of Emergency and Critical Care Center, Nara Medical University, Nara, Japan
| | - Hidetada Fukushima
- Department of Emergency and Critical Care Center, Nara Medical University, Nara, Japan
| | - Yasuhito Tanaka
- Department of Orthopedics and Surgery, Nara Medical University, KashiharaNara, 6348522, Japan
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Sebro R, la Garza-Ramos CD. Utilizing machine learning for opportunistic screening for low BMD using CT scans of the cervical spine. J Neuroradiol 2022; 50:293-301. [PMID: 36030924 DOI: 10.1016/j.neurad.2022.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Computed Tomography (CT) scans of the cervical spine are often performed to evaluate patients for trauma and degenerative changes of the cervical spine. We hypothesized that the CT attenuation of the cervical vertebrae can be used to identify patients who should be screened for osteoporosis. METHODS Retrospective study of 253 patients (177 training/validation and 76 test) with unenhanced CT scans of the cervical spine and DXA studies within 12 months of each other. Volumetric segmentation of C1-T1, clivus, and first ribs was performed to obtain the CT attenuation of each bone. The correlations of the CT attenuations between the bones and with DXA measurements were evaluated. Univariate receiver operator characteristic (ROC) analyses, and multivariate classifiers (Random Forest (RF), XGBoost, Naïve Bayes (NB), and Support Vector Machines (SVM)) analyzing the CT attenuation of all bones, were utilized to predict patients with osteopenia/osteoporosis and femoral neck bone mineral density (BMD) T-scores <-1. RESULTS There were positive correlations between the CT attenuation of each bone, and with the DXA measurements. A CT attenuation threshold of 305.2 Hounsfield Units (HU) at C3 had the highest accuracy =0.763 (AUC=0.814) to detect femoral neck BMD T-scores ≤-1 and a CT attenuation threshold of 323.6 HU at C3 had the highest accuracy=0.774 (AUC=0.843) to detect osteopenia/osteoporosis. The SVM classifier (AUC=0.756) had higher AUC than the RF (AUC=0.692, P=0.224), XGBoost (AUC=0.736; P=0.814), NB (AUC=0.622, P=0.133) and CT threshold of 305.2 HU at C3 (AUC=0.704, P=0.531) classifiers to identify patients with femoral neck BMD T-scores <-1. The SVM classifier (accuracy=0.816) was more accurate than using the CT threshold of 305.2 HU at C3 (accuracy=0.671) (McNemar's χ12=7.55, P=0.006). CONCLUSION Opportunistic screening for low BMD can be done using cervical spine CT scans. A SVM classifier was more accurate than using the CT threshold of 305.2 HU at C3.
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Affiliation(s)
- Ronnie Sebro
- Department of Radiology, Mayo Clinic, Jacksonville, FL 32224; Center for Augmented Intelligence, Mayo Clinic, Jacksonville, FL 32224.
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Ma F, Fan Y, Liao Y, Tang Q, Tang C, Xu S, Wang Q, Lan Y, Zhong D. Management of fresh odontoid fractures using posterior C1-2 fixation without fusion: a long-term clinical follow-up study. J Neurosurg Spine 2022; 36:968-978. [PMID: 34920424 DOI: 10.3171/2021.9.spine21822] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/20/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Posterior C1-2 fixation without fusion makes it possible to restore atlantoaxial motion after removing the implant, and it has been used as an alternative technique for odontoid fractures; however, the long-term efficacy of this technique remains uncertain. The purpose of the present study was to explore the long-term follow-up outcomes of patients with odontoid fractures who underwent posterior C1-2 fixation without fusion. METHODS A retrospective study was performed on 62 patients with type II/III fresh odontoid fractures who underwent posterior C1-2 fixation without fusion and were followed up for more than 5 years. The patients were divided into group A (23 patients with implant removal) and group B (39 patients without implant removal) based on whether they underwent a second surgery to remove the implant. The clinical outcomes were recorded and compared between the two groups. In group A, the range of motion (ROM) of C1-2 was calculated, and correlation analysis was performed to explore the factors that influence the ROM of C1-2. RESULTS A solid fracture fusion was found in all patients. At the final follow-up, no significant difference was found in visual analog scale score or American Spinal Injury Association Impairment Scale score between the two groups (p > 0.05), but patients in group A had a lower Neck Disability Index score and milder neck stiffness than did patients in group B (p < 0.05). In group A, 87.0% (20/23) of the patients had atlantoodontoid joint osteoarthritis at the final follow-up. In group A, the C1-2 ROM in rotation was 6.1° ± 4.5° at the final follow-up, whereas the C1-2 ROM in flexion-extension was 1.8° ± 1.2°. A negative correlation was found between the C1-2 ROM in rotation and the severity of tissue injury in the atlantoaxial region (r = -0.403, p = 0.024) and the degeneration of the atlantoodontoid joint (r = -0.586, p = 0.001). CONCLUSIONS Posterior C1-2 fixation without fusion can be used effectively for the management of fresh odontoid fractures. The removal of the implant can further improve the clinical efficacy, but satisfactory atlantoaxial motion cannot be maintained for a long time after implant removal. A surgeon should reconsider the contribution of posterior C1-2 fixation without fusion and secondary implant removal in preserving atlantoaxial mobility for patients with fresh odontoid fractures.
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Affiliation(s)
- Fei Ma
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Yuanhe Fan
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Yehui Liao
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Qiang Tang
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Chao Tang
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Shicai Xu
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Qing Wang
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
| | - Yongshu Lan
- 2Department of Radiology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Dejun Zhong
- 1Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China; and
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19
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Moscolo F, Meneghelli P, Boaro A, Impusino A, Locatelli F, Chioffi F, Sala F. The use of Grauer classification in the management of type II odontoid fracture in elderly: Prognostic factors and outcome analysis in a single centre patient series. J Clin Neurosci 2021; 89:26-32. [PMID: 34119278 DOI: 10.1016/j.jocn.2021.04.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 04/08/2021] [Accepted: 04/17/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To evaluate the results of Type II odontoid fractures management in the elderly, according to the Grauer classification. METHODS Consecutive patients with type II odontoid fracture, age > 65 years and follow-up longer than 3 months were included. Fracture management was proposed according to Grauer classification. Peri-surgical risk factors, NDI, VAS and rate of fusion were evaluated according to the treatment modality and compared between conservative and surgical groups. RESULTS Thirty-four patients were considered eligible for the study; 2 patients showed a Type IIa fracture, 30 patients a type IIb, and 2 patients a type IIc. Type IIa patients underwent conservative treatment that resulted in failure. A conservative management was adopted in 9 cases with type IIb due to patient preference or anaesthesiologic reasons with a treatment success at 6 months of 11%. Trans-odontoid stabilization was adopted in 21 type IIb cases with an evidence of bony or fibrous union at 6 months of 95% and a median NDI of 20%. A posterior approach was reserved for 2 type IIc fracture patients and in 6 cases as rescue surgery (bony union at 6 months of 100%; median NDI 37%). Higher Lakshmanan grade, gap and displacement of the fracture were found as significant risk factor for fracture non-union (p < 0.05). CONCLUSIONS The surgical group presented better clinical and radiological outcome and the anterior approach proved to achieve the best results in type IIb fractures. The presence of osteoporosis and fracture spatial features should be duly considered in the decision-making process.
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Affiliation(s)
- Fabio Moscolo
- Institute of Neurosurgery, Department of Neuroscience, Verona University and City Hospital, Verona, Italy
| | - Pietro Meneghelli
- Institute of Neurosurgery, Department of Neuroscience, Verona University and City Hospital, Verona, Italy.
| | - Alessandro Boaro
- Institute of Neurosurgery, Department of Neuroscience, Verona University and City Hospital, Verona, Italy
| | - Antonio Impusino
- Institute of Neurosurgery, Department of Neuroscience, Verona University and City Hospital, Verona, Italy; Division of Neurosurgery, Department of Neuroscience, Trieste University Hospital, Trieste, Italy
| | - Francesca Locatelli
- Unit of Epidemiology and Medical Statistics, Department of Diagnostic and Public Health, University of Verona, Verona, Italy
| | - Franco Chioffi
- Division of Neurosurgery, Department of Neuroscience, Padua University Hospital, Padua, Italy
| | - Francesco Sala
- Institute of Neurosurgery, Department of Neuroscience, Verona University and City Hospital, Verona, Italy
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20
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Barrey CY, di Bartolomeo A, Barresi L, Bronsard N, Allia J, Blondel B, Fuentes S, Nicot B, Challier V, Godard J, Marinho P, Kouyoumdjian P, Lleu M, Lonjon N, Freitas E, Berthiller J, Charles YP. C1-C2 Injury: Factors influencing mortality, outcome, and fracture healing. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2021; 30:1574-1584. [PMID: 33635376 DOI: 10.1007/s00586-021-06763-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 01/28/2021] [Accepted: 02/02/2021] [Indexed: 12/27/2022]
Abstract
BACKGROUND C1-C2 injury represents 25-40% of cervical injuries and predominantly occurs in the geriatric population. METHODS A prospective multicentre study was conducted under the aegis of the french spine surgery society (SFCR) investigating the impact of age, comorbidities, lesion type, and treatment option on mortality, complications, and fusion rates. RESULTS A total of 417 patients were recruited from 11 participating centres. The mean ± SD age was 66.6 ± 22 years, and there were 228 men (55%); 5.4% presented a neurological deficit at initial presentation. The most frequent traumatic lesion was C2 fracture (n = 308). Overall mortality was 8.4%; it was 2.3% among those aged ≤ 60 years, 5.0% 61-80 years, and 16.0% > 80 years (p < 0.001). Regarding complications, 17.8% of patients ≤ 70 years of age presented with ≥ 1 complication versus 32.3% > 70 years (p = 0.0009). The type of fracture did not condition the onset of complications and/or mortality (p > 0.05). The presence of a comorbidity was associated with a risk factor for both death (p = 0.0001) and general complication (p = 0.008). Age and comorbidities were found to be independently associated with death (p < 0.005). The frequency of pseudoarthrosis ranged from 0 to 12.5% up to 70 years of age and then constantly and progressively increased to reach 58.6% after 90 years of age. CONCLUSIONS C1-C2 injury represents a serious concern, possibly life-threatening, especially in the elderly. We found a major impact of age and comorbidities on mortality, complications, and pseudarthrosis; injury pattern or treatment option seem to have a minimal effect.
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Affiliation(s)
- C Y Barrey
- Department of Spine and Spinal Cord Surgery, P Wertheimer University Hospital, GHE, Hospices Civils de Lyon, and Claude Bernard University of Lyon 1, 59 boulevard Pinel, 69003, Lyon, France.
- Laboratory of Biomechanics, ENSAM, Arts et Metiers ParisTech, 151 Boulevard de l'Hôpital, 75013, Paris, France.
| | - A di Bartolomeo
- Division of Neurosurgery, Department of Neurology and Psychiatry, Sapienza University, Roma, Italy
| | - L Barresi
- Department of Spine Surgery, Institut Universitaire de L'appareil Locomoteur Et du Sport, CHU de Nice, Hopital Pasteur 2, 30 voie Romaine, 06001, Nice, France
| | - N Bronsard
- Department of Spine Surgery, Institut Universitaire de L'appareil Locomoteur Et du Sport, CHU de Nice, Hopital Pasteur 2, 30 voie Romaine, 06001, Nice, France
| | - J Allia
- Department of Spine Surgery, Institut Universitaire de L'appareil Locomoteur Et du Sport, CHU de Nice, Hopital Pasteur 2, 30 voie Romaine, 06001, Nice, France
| | - B Blondel
- Department of Spine Surgery, CHU Timone, AP-HM, Université Aix-Marseille, 264 rue Saint-Pierre, 13005, Marseille, France
| | - S Fuentes
- Department of Spine Surgery, CHU Timone, AP-HM, Université Aix-Marseille, 264 rue Saint-Pierre, 13005, Marseille, France
| | - B Nicot
- Department of Neurosurgery, CHU de Grenoble, Avenue Maquis-du-Grésivaudan, 38700, Grenoble-La Tronche, France
| | - V Challier
- Department of Orthopaedic Surgery, Hôpital Tripode, CHU de Bordeaux, Place Amélie-Raba-Léon, 33076, Bordeaux cedex, France
| | - J Godard
- Department of Spine Surgery, Hôpital Jean-Minjoz, 3 boulevard A Fleming, 25030, Besançon, France
| | - P Marinho
- Department of Neurosurgery, Hôpital Roger-Salengro, CHRU de Lille, Rue Emile-Laine, 59037, Lille, France
| | - P Kouyoumdjian
- Department of Orthopaedic Surgery, CHU de Nîmes, Avenue du Pr Debré, 30000, Nîmes, France
| | - M Lleu
- Department of Neurosurgery, CHU de Dijon, 14 rue Paul Gaffarel, 21000, Dijon, France
| | - N Lonjon
- Department of Neurosurgery, Hôpital Gui de Chauliac, 80 Avenue Augustin Fliche, 34090, Montpellier, France
| | - E Freitas
- Department of Spine and Spinal Cord Surgery, P Wertheimer University Hospital, GHE, Hospices Civils de Lyon, and Claude Bernard University of Lyon 1, 59 boulevard Pinel, 69003, Lyon, France
| | - J Berthiller
- Department of Biostatistics and Epidemiology, Pôle IMER, Hospices Civils de Lyon, 162 Avenue Lacassagne, 69424, Lyon, France
| | - Y P Charles
- Department of Spine Surgery, Hopitaux Universitaires de Strasbourg, 1 place de l'Hopital, BP 426, 67091, Strasbourg, France
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Müller JU, Müller J, Marx S, Matthes M, Nowak S, Schroeder HWS, Pillich DT. Biomechanical comparison of three different compression screws for treatment of odontoid fractures evaluation of a new screw design. Clin Biomech (Bristol, Avon) 2020; 77:105049. [PMID: 32497928 DOI: 10.1016/j.clinbiomech.2020.105049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/12/2020] [Accepted: 05/15/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Lag screw osteosynthesis in odontoid fractures shows a high rate of pseudarthrosis. Biomechanical properties may play a role with insufficient fragment compression or unnoticed screw stripping. A biomechanical comparison of different constructed lag-screws was carried out and the biomechanical properties determined. METHODS Two identical compression screws with different pilot holes (1.25 and 2.5 mm), a double-threaded screw and one sleeve-nut-screw were tested on artificial bone (Sawbone, densities 10-30pcf). Fragment compression and torque were continuously measured using thin-film force sensors (Flexiforce A201, Tekscan) and torque sensors (PCE-TM 80, PCE GmbH). FINDINGS The lowest compression reached the double-threaded screw. Compression and sleeve-nut-screw achieved 214-298% and 325-546%, respectively, of the compression force of double-threaded-screw, depending on the test material. The pilot hole optimization led to a significant improvement in compression only in the densest test material. Screw stripping took place significantly later with increasing density of the test material on all screws. In compression screws this was done at a screw rotation of 180-270°, in sleeve nut screw at 270-720° and in double-threaded screws at 300-600° after reaching the maximum compression. INTERPRETATION Double-threaded screw is robust against screw stripping, but achieves only low fragment compression. The classic compression screws achieve better compression, but are sensitive to screw stripping. Sleeve-nut screw is superior in compression and as robust as double-threaded screw against screw stripping. Whether the better biomechanical properties lead to a reduction in pseudarthrosis must be proven in clinical trials.
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Affiliation(s)
- Jan-Uwe Müller
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany.
| | - Jonas Müller
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
| | - Sascha Marx
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
| | - Marc Matthes
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
| | - Stephan Nowak
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
| | | | - Dirk Thomas Pillich
- Department of Neurosurgery, University Medicine Greifswald, Greifswald, Germany
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Gembruch O, Ahmadipour Y, Lemonas E, Müller O. The Anterior Transarticular Fixation of C1/C2 in the Elderly With Dens Fractures. Int J Spine Surg 2020; 14:162-169. [PMID: 32355621 DOI: 10.14444/7031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Anterior transarticular screw fixation (ATSF) of C1/C2 can be used for the treatment of unstable dens fractures. Here, we evaluated the feasibility of an anterior C1/C2 fixation in elderly patients with unstable dens fractures. Furthermore, we tried to analyze safe entry zones for ATSF surgery. Methods A consecutive cohort of 13 patients with unstable dens fractures were treated with ATSF of C1/C2 between January 2015 and October 2016. If necessary, an additional screw was placed into the odontoid process. The placement was radiographically analyzed using the 3D Arcadis Orbic (Siemens, Erlangen, Germany). Additionally, computed tomography scans of the cervical spine from 50 trauma patients were analyzed to evaluate safe entry zones for anterior odontoid screw fixation and for ATSF. Results ATSF was performed in 13 cases (7 female, 6 male; mean age 81.80 years). One screw had to be corrected intraoperatively due to initial malplacement. Neurological deficits or an injury of the vertebral artery were not observed. All patients suffered from swallowing difficulties during the postoperative course, without lesions of the esophagus or the trachea. In 4 patients (30.8%), an additional posterior fixation was offered to the patients due to progressive loosening of the screws.The anatomical-radiographic analyzes revealed a significantly shallower angle of trajectory for anterior odontoid screw fixation (24.9° ± 5.85°) than for ATSF (39.1° ± 6.44° (left); 40.5° ± 6.79° (right) P = 0.02). Conclusions The ATSF of C1/C2 might be a valuable option in the treatment of instable C1/C2 fractures, especially in the elderly or in patients with short necks and/or high body mass index due to the steeper trajectory compared with odontoid screw placement. Yet available screws seem to be of inferior resistance compared with the biomechanical properties of a dorsal fixation. Further studies should focus on screws with better mechanical properties and probably additional cement augmentation. Level of Evidence 4.
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Affiliation(s)
- Oliver Gembruch
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Yahya Ahmadipour
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Elias Lemonas
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Oliver Müller
- Department of Neurosurgery, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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Lvov I, Grin A, Godkov I, Kordonskiy A, Krylov V. Posterior percutaneous transarticular stand-alone screw instrumentation of C1-C2 with endoscopic assistance: A report of two cases. Neurocirugia (Astur) 2019; 32:78-83. [PMID: 31718951 DOI: 10.1016/j.neucir.2019.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 08/07/2019] [Accepted: 08/22/2019] [Indexed: 10/25/2022]
Abstract
We present two cases of minimally invasive posterior transarticular screw fixation of C1-C2. The points for screw insertion were visualized by endoscopy via the instrumental port. A patient with a type III odontoid fracture with subluxation underwent a minimally invasive posterior stand-alone transarticular screw fixation. Despite the application of compression screws, for technical reasons, only minimal compression on the anterior third of the C1-C2 lateral joint was achieved. However, complete fracture fusion was achieved with stable fibrous C1-C2 fusion 2.5 years postoperatively. A second patient with a chronic type II odontoid fracture underwent percutaneous C1-C2 fixation by the same method. After 2 years, fracture fusion and C1-C2 lateral mass ankylosis were achieved. The use of a tubular retractor and endoscopy in stand-alone screw fixation of C1-C2 allows direct visualization of the screw entry point and decreases surgical trauma. This procedure might be an alternative to other methods of transarticular instrumentation.
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Affiliation(s)
- Ivan Lvov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia.
| | - Andrey Grin
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia; A.I. Evdokimov Moscow State University of Medicine and Dentistry, Russia
| | - Ivan Godkov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia
| | - Anton Kordonskiy
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia
| | - Vladimir Krylov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia; A.I. Evdokimov Moscow State University of Medicine and Dentistry, Russia
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24
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Lvov I, Grin A, Kordonskiy A, Sytnik A, Smirnov V, Khushnazarov U, Krylov V. Minimally Invasive Posterior Transarticular Stand-Alone Screw Instrumentation of C1-C2 Using a Transmuscular Approach: Description of Technique, Results and Comparison with Posterior Midline Exposure. World Neurosurg 2019; 128:e796-e805. [PMID: 31078803 DOI: 10.1016/j.wneu.2019.04.259] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 11/15/2022]
Abstract
PURPOSE The aim of this study was to compare the feasibility, safety, and fusion results of posterior transarticular stand-alone screw (SAS) instrumentation of C1-C2 with a minimally invasive technique to those of a posterior midline exposure. METHODS Between 2008 and 2016, 164 patients underwent surgical treatment for traumatic injuries to the upper cervical vertebrae at our institution. We included 38 patients (27 men and 11 women; age range, 17-81 years) in the study. The posterior midline approach (PMA) group (23 patients) included patients who underwent surgery by means of a conventional midline incision after percutaneous screw insertion. The transmuscular approach (TMA) group (15 patients) included patients who underwent SAS fixation by use of a minimally invasive technique. The mean follow-up period was 58 months (range, 12-118 months). RESULTS Statistical analysis revealed that the operative time, blood loss volume, and severity of postoperative pain were lower in the TMA group. No significant excess of radiation exposure to the surgical team and the patients occurred in TMA group compared with the PMA group. C1-C2 fusion was observed in 37 patients. Stable fibrous fusion between the C1 and C2 vertebrae was found in 1 patient. CONCLUSIONS A minimally invasive technique by use of a paravertebral transmuscular approach provides an alternative to routine posterior transarticular SAS fixation of C1 and C2 through a posterior midline approach. The minimally invasive technique reduces the duration of surgery and the volume of blood loss, decreases the severity of postoperative pain, and does not increase the amount of radiation exposure for the surgical team and the patient.
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Affiliation(s)
- Ivan Lvov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia.
| | - Andrey Grin
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia; A. I. Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
| | - Anton Kordonskiy
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia
| | | | - Vladimir Smirnov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia
| | | | - Vladimir Krylov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia; A. I. Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
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Lvov I, Grin A, Talypov A, Kordonskiy A, Sytnik A, Khushnazarov U, Smirnov V, Krylov V. A Comparison of the Long-Term Results of Posterior Transarticular Stand-Alone Screw Instrumentation and Magerl Technique in Patients with Traumatic Atlantoaxial Instability: Mean 5-Year Follow-Up Study with Radiological and Patient-Rated Outcomes Assessments. World Neurosurg 2019; 125:e1138-e1150. [PMID: 30780035 DOI: 10.1016/j.wneu.2019.01.263] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/26/2019] [Accepted: 01/28/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE To perform a radiological analysis of the degeneration of C1-C2 joints after C1-C2 transarticular fixation (TAF) and compare the long-term results of a routine Magerl technique (RMT) to a posterior transarticular C1-C2 stand-alone screw instrumentation (SAS) application. METHODS A total of 40 patients (26 men and 14 women) were included in the present retrospective observational cohort study. The mean follow-up period was 61.7 months (range, 11-118). The mean patient age at the baseline examination was 48.4 years (range, 22-82). Of the 40 patients, 11 were included in the RMT group and 29 in the SAS group. RESULTS The structure of 80 atlantoaxial joints was analyzed, with grade 4 degenerative changes observed in 57 joints (71.3%). Of the 40 analyzed atlanto-odontoid joints, grade 4 degenerative changes were revealed in 18 joints (45%). C1-C2 bone fusion was observed in 38 patients (95%) and stable fibrous fusion in 2 patients (5%). No cases of C1-C2 nonunion were revealed. No statistically significant differences in the frequency of C1-C2 fracture consolidation or C1-C2 fusion were revealed between the RMT and SAS groups. CONCLUSIONS The application of cortical lag screws in TAF might result in stable atlantoaxial joint fusion formation without joint curettage. Atlanto-odontoid joint fusion was also observed after C1-C2 TAF. The application of cortical lag screws for bilateral fixation using the SAS technique resulted in C1-C2 fusion in 93.1% of cases, comparable to the results with the Magerl technique.
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Affiliation(s)
- Ivan Lvov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia.
| | - Andrey Grin
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia; A.I. Evdokimov Moscow Medical University, Moscow, Russia
| | | | - Anton Kordonskiy
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia
| | | | | | - Vladimir Smirnov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia
| | - Vladimir Krylov
- Sklifosovsky Research Institute of Emergency Care, Moscow, Russia; A.I. Evdokimov Moscow Medical University, Moscow, Russia
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Jo AS, Wilseck Z, Manganaro MS, Ibrahim M. Essentials of Spine Trauma Imaging: Radiographs, CT, and MRI. Semin Ultrasound CT MR 2018; 39:532-550. [DOI: 10.1053/j.sult.2018.10.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schwarz F, Lawson McLean A, Waschke A, Kalff R. Cement-augmented anterior odontoid screw fixation in elderly patients with odontoid fracture. Clin Neurol Neurosurg 2018; 175:144-148. [DOI: 10.1016/j.clineuro.2018.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/01/2018] [Accepted: 11/04/2018] [Indexed: 11/15/2022]
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Josten C, Jarvers JS, Glasmacher S, Spiegl UJ. Odontoid fractures in combination with C1 fractures in the elderly treated by combined anterior odontoid and transarticular C1/2 screw fixation. Arch Orthop Trauma Surg 2018; 138:1525-1531. [PMID: 30056532 DOI: 10.1007/s00402-018-3013-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate risk factors of accompanied C1 fractures in elderly patients with type II odontoid fractures (OF) and to analyze the complication rate and the outcomes of patients after combined anterior odontoid and transarticular C1/2 screw fixation (AOTAF). MATERIALS AND METHODS The study represents a retrospective case series at a single level-1 trauma center. All elderly patients (≥ 70 years) with acute combination injuries (CI) including type II OF with an accompanied C1 fracture, who were treated by an anterior approach, were included. All postoperative complications were analyzed based on the patient notes. Clinical and radiological controls were performed after 1 year. Main parameters of interest were 1-year mortality rate, pain level, and satisfaction rate after 1 year. RESULTS A total of 23 patients were included. The average age was 84.6 years (range 73-94 years). All patients had atlanto-odontoid osteoarthritis (AOO) and all but two patients were injured by low-energy falls. Dysphagia was the most common postoperative complication (26.1%). Surgical revision was necessary in one of these patients due to hematoma. Dysphagia improved in all patients considerably. Loss of follow-up was 21.7%. The 1-year mortality was 21.7% (n = 5). The mean pain level and satisfaction rate was 2.5 (± 0.9) and 7.3 (± 0.7), respectively. After 1 year, no signs of non-union were visible. CONCLUSIONS AOO was observed in all patients with CI. The main cause of trauma was a low-energy fall. The pain levels were low to moderate and satisfaction levels were promising 1 year after surgery. Nonetheless, AOTAF is associated with a high rate of postoperative dysphagia, which resolves in the majority of patients due to conservative management.
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Affiliation(s)
- Christoph Josten
- Department of Orthopaedics, Trauma Surgery and Reconstructive Surgery, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
| | - Jan-Sven Jarvers
- Department of Orthopaedics, Trauma Surgery and Reconstructive Surgery, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
| | - Stefan Glasmacher
- Department of Orthopaedics, Trauma Surgery and Reconstructive Surgery, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany
| | - Ulrich J Spiegl
- Department of Orthopaedics, Trauma Surgery and Reconstructive Surgery, University of Leipzig, Liebigstr. 20, 04103, Leipzig, Germany.
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Rehousek P, Jenner E, Holton J, Czyz M, Capek L, Henys P, Kulvajtova M, Krbec M, Skala-Rosenbaum J. Biomechanical comparison of cemented versus non-cemented anterior screw fixation in type II odontoid fractures in the elderly: a cadaveric study. Spine J 2018; 18:1888-1895. [PMID: 29783086 DOI: 10.1016/j.spinee.2018.05.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 04/21/2018] [Accepted: 05/16/2018] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Odontoid process fractures are the most common injuries of the cervical spine in the elderly. Anterior screw stabilization of type II odontoid process fractures improves survival and function in these patients but may be complicated by failure of fixation. PURPOSE The present study aimed to determine whether cement augmentation of a standard anterior screw provides biomechanically superior fixation of type II odontoid fractures in comparison with a non-cemented standard screw. STUDY DESIGN Twenty human cadaveric C2 vertebrae from elderly donors (mean age 83 years) were obtained. METHODS Anderson and D'Alonzo type IIa odontoid fracture was created by transverse osteotomy, and fluoroscopy-guided anterior screw fixation was performed. The specimens were divided into two matched groups. The cemented group (n=10) had radiopaque high viscosity polymethylmethacrylate cement injected via Jamshidi needle into the base of the odontoid process. The other group was not augmented. A V-shaped punch was used for loading the odontoid in an anteroposterior direction until failure. The failure state was defined as screw cutout or 5% force decrease. Mean failure load and bending stiffness were calculated. RESULTS The mean failure load for the cemented group was 352±12 N compared with 168±23 N for the non-cemented group (p<.001). The mean initial stiffness of the non-cemented group was 153±19 N/mm compared with 195±29 N/mm for the cemented group (p<.001) CONCLUSIONS: Cement augmentation of an anterior standard screw fixation of type II odontoid process fractures in elderly patients significantly increased load to failure under anteroposterior load in comparison with non-augmented fixation. This may be a valuable technique to reduce failure of fixation.
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Affiliation(s)
- Petr Rehousek
- Royal Orthopaedic Hospital, Bristol Rd South, Birmingham B32 1AP, UK; Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00 Praha 10-Vinohrady, Prague, Czechia.
| | - Edward Jenner
- Royal Orthopaedic Hospital, Bristol Rd South, Birmingham B32 1AP, UK
| | - James Holton
- Royal Orthopaedic Hospital, Bristol Rd South, Birmingham B32 1AP, UK
| | - Marcin Czyz
- Royal Orthopaedic Hospital, Bristol Rd South, Birmingham B32 1AP, UK
| | - Lukas Capek
- Technical University of Liberec, Studentska 1402/2, 461 17 Liberec, Czechia
| | - Petr Henys
- Technical University of Liberec, Studentska 1402/2, 461 17 Liberec, Czechia
| | - Marketa Kulvajtova
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00 Praha 10-Vinohrady, Prague, Czechia
| | - Martin Krbec
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00 Praha 10-Vinohrady, Prague, Czechia
| | - Jiri Skala-Rosenbaum
- Third Faculty of Medicine, Charles University, Ruska 2411/87, 100 00 Praha 10-Vinohrady, Prague, Czechia
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Kushchayev SV, Glushko T, Jarraya M, Schuleri KH, Preul MC, Brooks ML, Teytelboym OM. ABCs of the degenerative spine. Insights Imaging 2018; 9:253-274. [PMID: 29569215 PMCID: PMC5893484 DOI: 10.1007/s13244-017-0584-z] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 11/28/2017] [Accepted: 12/06/2017] [Indexed: 12/13/2022] Open
Abstract
Degenerative changes in the spine have high medical and socioeconomic significance. Imaging of the degenerative spine is a frequent challenge in radiology. The pathogenesis of this degenerative process represents a biomechanically related continuum of alterations, which can be identified with different imaging modalities. The aim of this article is to review radiological findings involving the intervertebral discs, end plates, bone marrow changes, facet joints and the spinal canal in relation to the pathogenesis of degenerative changes in the spine. Findings are described in association with the clinical symptoms they may cause, with a brief review of the possible treatment options. The article provides an illustrated review on the topic for radiology residents. TEACHING POINTS • The adjacent vertebrae, intervertebral disc, ligaments and facet joints constitute a spinal unit. • Degenerative change is a response to insults, such as mechanical or metabolic injury. • Spine degeneration is a biomechanically related continuum of alterations evolving over time.
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Affiliation(s)
- Sergiy V. Kushchayev
- Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023 USA
| | - Tetiana Glushko
- Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023 USA
| | - Mohamed Jarraya
- Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023 USA
| | - Karl H. Schuleri
- Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023 USA
| | - Mark C. Preul
- Division of Neurological Surgery, Barrow Neurological Institute, St. Joseph’s Hospital and Medical Center, 350 West Thomas Rd, Phoenix, AZ USA
| | - Michael L. Brooks
- Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023 USA
| | - Oleg M. Teytelboym
- Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023 USA
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Faure A, Graillon T, Pesenti S, Tropiano P, Blondel B, Fuentes S. Trends in the surgical management of odontoid fractures in patients above 75 years of age: Retrospective study of 70 cases. Orthop Traumatol Surg Res 2017; 103:1221-1228. [PMID: 28789999 DOI: 10.1016/j.otsr.2017.07.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 06/06/2017] [Accepted: 07/06/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND Odontoid fractures are the most common upper cervical spine fracture in adults over 70 years of age. Hence, treatment of these fractures has public health implications. OBJECTIVES Evaluate the early complications, bone healing and mortality in patients above 75 years of age who undergo surgical treatment of an odontoid fracture. Compare the results between patients operated with the Harms technique or anterior screw fixation. METHODS This was a retrospective study of 70 patients with an odontoid fracture who were treated surgically between 2000 and 2015 at the Hôpital de la Timone in France. The age at the time of diagnosis, comorbidities, ASA score and autonomy were evaluated. Bone healing was determined using computed tomography. RESULTS In the cohort, 22 patients underwent anterior screw fixation, 38 were treated using the Harms technique and 10 with other procedures. The average age was 85.1 years. Fifty-four percent of patients had an ASA score above 3. The average follow-up was 23.4 months. An Anderson type II fracture was present in 80.6% of patients. In the anterior screw fixation group, the operative time was significantly shorter than in the Harms group and no blood transfusions were needed. However, 13.6% of these patients had to be re-operated because the initial construct was unstable; no patients in the Harms group underwent revision surgery. There were more complications in the anterior screw fixation group than in the Harms group: 41% versus 13.2% (P<0.02). The fractures had healed in all patients reviewed after 1 year. The 3-month survival in the anterior screw fixation group was 64.7% and it was 81.3% in the Harms group. These rates were stable at 1 year with no statistical differences between groups. CONCLUSION Surgical treatment of odontoid fractures in the elderly results in an excellent union rate. The mortality rate is stable after 3 months. In our experience, the Harms technique has a lower risk of complications and better mechanical stability than anterior screw fixation. Despite the steep learning curve, we believe the Harms technique is probably the best choice for treating odontoid fractures in the elderly. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- A Faure
- Unité de chirurgie du rachis, hôpital de la Timone, université Aix-Marseille, CHU Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - T Graillon
- Unité de chirurgie du rachis, hôpital de la Timone, université Aix-Marseille, CHU Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - S Pesenti
- Unité de chirurgie du rachis, hôpital de la Timone, université Aix-Marseille, CHU Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - P Tropiano
- Unité de chirurgie du rachis, hôpital de la Timone, université Aix-Marseille, CHU Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - B Blondel
- Unité de chirurgie du rachis, hôpital de la Timone, université Aix-Marseille, CHU Timone, 264, rue Saint-Pierre, 13005 Marseille, France
| | - S Fuentes
- Unité de chirurgie du rachis, hôpital de la Timone, université Aix-Marseille, CHU Timone, 264, rue Saint-Pierre, 13005 Marseille, France.
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Rustagi T, Iwanaga J, Sardi JP, Alonso F, Oskouian RJ, Tubbs RS. Anatomic Variations of the Anterior Atlantodental Joint and Relations to the Apical and Alar Ligaments in a Geriatric Population. World Neurosurg 2017; 107:506-510. [PMID: 28823669 DOI: 10.1016/j.wneu.2017.08.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/04/2017] [Accepted: 08/08/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND Degenerative changes in the upper cervical spine may be age related degeneration or a pathological process such as rheumatoid arthritis. However, to our knowledge, the relationship between the apical and alar ligaments and these anomalies has not been discussed. We present anatomical variations of the anterior atlantodental joint observed during cadaveric dissection of adult craniovertebral junctions, the relationship with the alar and apical ligaments and discuss possible origins and clinical implications. METHODS The upper cervical spine including part of the occiput was dissected from cadavers whose mean age at death was 78.9 years-old. The anterior atlantodental joint and apical and alar ligaments were observed and any atypical findings were noted. RESULTS In eleven specimens, seven had a dens corona, three had an os odontoideum and one had a dens aureola, which arose from the upper part of the anterior arch of the atlas. Only four specimens had an apical ligament. CONCLUSIONS The possible etiologies and the clinical applications of these craniovertebral anomalies in a geriatric population should be appreciated by the clinician treating patients with disease in this area or interpreting imaging in the region.
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Affiliation(s)
- Tarush Rustagi
- Seattle Science Foundation, Seattle, Washington, USA; Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA; Department of Spine Surgery, Indian Spinal Injuries Centre, New Delhi, India.
| | - Joe Iwanaga
- Seattle Science Foundation, Seattle, Washington, USA; Department of Anatomy, Kurume University School of Medicine, Kurume, Japan
| | - Juan P Sardi
- Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Fernando Alonso
- Seattle Science Foundation, Seattle, Washington, USA; Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA
| | - Rod J Oskouian
- Seattle Science Foundation, Seattle, Washington, USA; Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USA
| | - R Shane Tubbs
- Seattle Science Foundation, Seattle, Washington, USA; Department of Anatomical Sciences, St. George's University, Grenada, West Indies
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Kaesmacher J, Schweizer C, Valentinitsch A, Baum T, Rienmüller A, Meyer B, Kirschke JS, Ryang YM. Osteoporosis Is the Most Important Risk Factor for Odontoid Fractures in the Elderly. J Bone Miner Res 2017; 32:1582-1588. [PMID: 28256741 DOI: 10.1002/jbmr.3120] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 02/24/2017] [Accepted: 02/27/2017] [Indexed: 11/11/2022]
Abstract
Traumatic odontoid fractures (TOFs) have been described as the most common injury affecting the C-spine in the elderly. Previous studies have identified degenerative changes and bone loss as important predisposing factors. However, their interaction and respective age-adjusted impact needs further clarification. We conducted a retrospective analysis of 5303 patients (aged ≥60 years) admitted to a level I trauma center between January 2008 and January 2016 who underwent CT imaging of the C-spine. Ninety-two patients with TOF and 80 patients with other cervical spine fractures (OCSF) were identified and a respective 3:1 age- and sex-matched control group without fractures after trauma was built. In all groups, cervical bone mineral density (cBMD) was determined using phantom calibration, and degenerative changes were evaluated in a qualitative manner. In all groups, the severity of degenerative changes of the C-spine increased with age (all p < 0.05) and was inversely correlated with cBMD (all p < 0.05). cBMD was the only significant predictor of a TOF in a multivariate logistic regression model (adjusted odds ratio [OR] = 3.066, 95% confidence interval [CI] 1.432-6.563 for cervical osteoporosis). An association between odontoid cysts and TOF reached significance only in Anderson and D'Alonzo (A&D) type II TOFs (aOR = 1.383; 95% CI 1.012-1.890). Patients with OCSFs, compared with patients with TOFs, were younger (median 74 versus 83 years) and had a higher cBMD (median 208 mg/mL versus 172 mg/mL). No differences were observable when comparing cBMD and grades of degenerative changes between OCSFs and their control group (all p >0.1). Decreased cBMD is the major predisposing factor for the occurrence of TOF but not for OCSF in the elderly. The severity of odontoid cysts was found to be a cBMD-independent factor associated with A&D type II TOFs. However, degenerative changes in the odontoid neighboring joints seem to be an epiphenomenon of bone loss and older age but do not independently predispose for TOF. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Johannes Kaesmacher
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Claudia Schweizer
- Department of Neurorsurgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Alexander Valentinitsch
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Thomas Baum
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Anna Rienmüller
- Department of Neurorsurgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.,Department of Orthopedics, Medizinische Universität Wien, Vienna, Austria
| | - Bernhard Meyer
- Department of Neurorsurgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Jan S Kirschke
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Yu-Mi Ryang
- Department of Neurorsurgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
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Biomechanical Assessment of Stabilization of Simulated Type II Odontoid Fracture with Case Study. Asian Spine J 2017; 11:15-23. [PMID: 28243364 PMCID: PMC5326723 DOI: 10.4184/asj.2017.11.1.15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/20/2016] [Accepted: 07/16/2016] [Indexed: 12/23/2022] Open
Abstract
STUDY DESIGN Researchers created a proper type II dens fracture (DF) and quantified a novel current posterior fixation technique with spacers at C1-C2. A clinical case study supplements this biomechanical analysis. PURPOSE Researchers explored their hypothesis that spacers combined with posterior instrumentation (PI) reduce range of motion significantly, possibly leading to better fusion outcomes. OVERVIEW OF LITERATURE Literature shows that the atlantoaxial joint is unique in allowing segmental rotary motion, enabling head turning. With no intervertebral discs at these joints, multiple ligaments bind the axis to the skull base and to the atlas; an intact odontoid (dens) enhances stability. The most common traumatic injury at these strong ligaments is a type II odontoid fracture. METHODS Each of seven specimens (C0-C3) was tested on a custom-built six-degrees-of-freedom spine simulator with constructs of intact state, type II DF, C1-C2 PI, PI with joint capsulotomy (PIJC), PI with spacers (PIS) at C1-C2, and spacers alone (SA). A bending moment of 2.0 Nm (1.5°/sec) was applied in flexion-extension (FE), lateral bending (LB), and axial rotation (AR). One-way analysis of variance with repeated measures was performed. RESULTS DF increased motion to 320%, 429%, and 120% versus intact (FE, LB, and AR, respectively). PI significantly reduced motion to 41%, 21%, and 8%. PIJC showed negligible changes from PI. PIS reduced motion to 16%, 14%, and 3%. SA decreased motion to 64%, 24%, and 54%. Reduced motion facilitated solid fusion in an 89-year-old female patient within 1 year. CONCLUSIONS Type II odontoid fractures can lead to acute or chronic instability. Current fixation techniques use C1-C2 PI or an anterior dens screw. Addition of spacers alongside PI led to increased biomechanical rigidity over intact motion and may offer an alternative to established surgical fixation techniques.
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Li M, Liu S, Kong Q, Sun H, Zhang X, Wang G. Incidence and age and gender profiles of hyperplasia in individual cervical vertebrae. J Int Med Res 2016; 44:917-22. [PMID: 27235407 PMCID: PMC5536620 DOI: 10.1177/0300060516645038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/28/2016] [Indexed: 11/15/2022] Open
Abstract
Objective To analyze the incidence and age and gender profiles of hyperplasia in individual cervical vertebrae. Methods In this retrospective study, computed tomography three-dimensional reconstruction images of cervical vertebrae from patients with neck discomfort were analyzed for the presence of hyperplasia and compared with age and gender data. Results Scans from a total of 580 patients (352 males, 228 females) were analyzed. The highest incidence of hyperplasia was seen in C2 (25%), followed by C1 (23%), C6 (16%), C5 (15%), C7 (9%), C4 (8%) and C3 (4%). Patients with C2 hyperplasia were the youngest and those with C1 hyperplasia were the second youngest, while patients with C7 hyperplasia were the oldest. Of those with C2, C1 and C7 hyperplasia, males were significantly younger than females, whereas of those with C3, C4, C5 and C6 hyperplasia, females were significantly younger than males. Conclusions Hyperplasia of the cervical spine shows different age and gender profiles among the seven vertebrae. These findings may be helpful for the early recognition of cervical hyperplasia and highlight the importance of protecting the atlanto-axial joint in daily life.
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Affiliation(s)
- Min Li
- School of Medicine, Shandong University, Jinan, Shandong Province, China Department of Radiology, Taian City Central Hospital, Shandong Province, China
| | - Shuyong Liu
- School of Medicine, Shandong University, Jinan, Shandong Province, China Department of Radiology, Taian City Central Hospital, Shandong Province, China
| | - Qingkui Kong
- Department of Radiology, Taian City Central Hospital, Shandong Province, China
| | - Haitao Sun
- Department of Radiology, Taian City Central Hospital, Shandong Province, China
| | - Xia Zhang
- Department of Radiology, Taian City Central Hospital, Shandong Province, China
| | - Guangbin Wang
- School of Medicine, Shandong University, Jinan, Shandong Province, China
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Anterior transarticular atlantoaxial screw fixation in combination with dens screw fixation for type II odontoid fractures with associated atlanto-odontoid osteoarthritis. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2016; 25:2210-7. [DOI: 10.1007/s00586-016-4493-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 02/22/2016] [Accepted: 02/23/2016] [Indexed: 10/22/2022]
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Cement augmented anterior odontoid screw fixation is biomechanically advantageous in osteoporotic patients with Anderson Type II fractures. ACTA ACUST UNITED AC 2015; 28:E126-32. [PMID: 25310397 DOI: 10.1097/bsd.0000000000000177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN A biomechanical human cadaveric study. OBJECTIVE The authors tested a cannulated and perforated lag screw and compared in situ polymethylmethacrylate (PMMA) augmentation against nonaugmentation for fixation of osteoporotic type II odontoid fractures. SUMMARY OF BACKGROUND DATA Osteoporosis has been identified as a strong predictor for pseudarthrosis after screw fixation of type II odontoid fractures with cut-out through the anterior wall of C2 as the most frequent mode of implant failure. The concept of PMMA augmentation of the proximal screw shank could serve as a useful supplement in this context. METHODS A total of 18 fresh-frozen human cadaveric C2 vertebrae were harvested (median 86.5 y; range, 69-98 y). Reduced bone quality was verified by quantitative computed tomography. Type II odontoid fractures were created and repaired with a cannulated lag screw, which has perforations in the proximal screw shank. Additional PMMA augmentation was carried out for 9 specimens. The position of the screw and cement distribution were evaluated by computed tomography. Values for maximum force to failure, energy to failure, and stiffness were statistically compared between cement augmented and nonaugmented screws. RESULTS Cement distribution in the C2 vertebral body was circumferential around the screw shank without leakage into the spinal canal or into the fracture gap in all 9 specimens. The cement augmented screws showed a 2.4 times higher maximum force to failure (363±94 N, P<0.001), a 2.7 times higher energy to failure (1300±698 mJ, P<0.001), and a 1.76 times higher stiffness (90±35 N/mm, P=0.031) in comparison with the nonaugmented screws. CONCLUSIONS Cement augmentation for fixation of osteoporotic type II odontoid fractures showed biomechanical advantages. It was also shown that cement augmentation of the newly developed screw is technically easy and safe under in vitro conditions. The technique might be useful with regard to the surgical treatment of elderly patients with osteoporotic odontoid fractures.
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Miyata K, Mikami T, Koyanagi I, Mikuni N, Narimatsu E. Cervical spinal cord injuries associated with resuscitation from fatal circulatory collapse. Acute Med Surg 2015; 3:86-93. [PMID: 29123758 DOI: 10.1002/ams2.142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 05/19/2015] [Indexed: 11/10/2022] Open
Abstract
Introduction Fatal cervical spinal cord injury (SCI) associated with collapse of the circulatory and/or respiratory system usually consists of high cervical SCI caused by high-energy trauma. As the elderly population grows, however, the etiology of fatal SCI may be changing. The aim of the present study was to understand the current clinical features of fatal SCI. Methods Retrospective analysis was performed on 73 consecutive patients with acute cervical SCI between 2007 and 2013. Fourteen (19%) of them presented in a state of coma due to severe circulatory collapse after cardiac arrest (CA, n = 11) or respiratory arrest (RA, n = 3), and were resuscitated at the scene or hospital. The clinical features and radiological findings of these 14 patients were compared with those of the other 59. Results Eleven of the 14 fatal SCI patients were injured by minor traumas. Computed tomography revealed C1-2 fractures or dislocations in 11 patients and subaxial injuries in three patients. Eleven patients showed some kind of ossification of the spinal column ligaments. In a univariate analysis, the predictive factors associated with fatal circulatory collapse were age (P = 0.02), estimated C1/2 injury (P < 0.0001), and complete tetraplegia (P < 0.0001). In a multiple regression model for fatality, the odds ratios (OR) for C1/2 injury and ASIA impairment score (AIS) A were 20.58 (P = 0.006) and 151.97 (P = 0.002). Conclusions A state of unconsciousness with fatal circulatory collapse was significantly associated with C1/2 injury and AIS A. Moreover, our data show that fatal SCI can occur due to minor trauma in elderly people.
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Affiliation(s)
- Kei Miyata
- Department of Emergency Medicine Sapporo Medical University Sapporo Japan
| | - Takeshi Mikami
- Department of Neurosurgery Sapporo Medical University Sapporo Japan
| | - Izumi Koyanagi
- Department of Neurosurgery, Hokkaido Neurosurgical Hokkaido Neurosurgical Memorial Hospital Sapporo Japan
| | - Nobuhiro Mikuni
- Department of Neurosurgery Sapporo Medical University Sapporo Japan
| | - Eichi Narimatsu
- Department of Emergency Medicine Sapporo Medical University Sapporo Japan
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O'Brien WT, Shen P, Lee P. The Dens: Normal Development, Developmental Variants and Anomalies, and Traumatic Injuries. J Clin Imaging Sci 2015. [PMID: 26199787 PMCID: PMC4498315 DOI: 10.4103/2156-7514.159565] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Accurate interpretation of cervical spine imagining can be challenging, especially in children and the elderly. The biomechanics of the developing pediatric spine and age-related degenerative changes predispose these patient populations to injuries centered at the craniocervical junction. In addition, congenital anomalies are common in this region, especially those associated with the axis/dens, due to its complexity in terms of development compared to other vertebral levels. The most common congenital variations of the dens include the os odontoideum and a persistent ossiculum terminale. At times, it is necessary to distinguish normal development, developmental variants, and developmental anomalies from traumatic injuries in the setting of acute traumatic injury. Key imaging features are useful to differentiate between traumatic fractures and normal or variant anatomy acutely; however, the radiologist must first have a basic understanding of the spectrum of normal developmental anatomy and its anatomic variations in order to make an accurate assessment. This review article attempts to provide the basic framework required for accurate interpretation of cervical spine imaging with a focus on the dens, specifically covering the normal development and ossification of the dens, common congenital variants and their various imaging appearances, fracture classifications, imaging appearances, and treatment options.
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Affiliation(s)
- William T O'Brien
- Department of Radiology, University of California, Davis, Sacramento, USA ; Department of Radiology, David Grant USAF Medical Center, Travis AFB, California, USA ; Department of Radiology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - Peter Shen
- Department of Radiology, University of California, Davis, Sacramento, USA
| | - Paul Lee
- Department of Radiology, University of California, Davis, Sacramento, USA
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Cement-augmented anterior odontoid screw fixation for osteoporotic type II odontoid fractures in elderly patients: prospective evaluation of 11 patients. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2015; 25:115-121. [DOI: 10.1007/s00586-015-4084-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/18/2015] [Accepted: 06/18/2015] [Indexed: 12/22/2022]
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Li L, Liu WF, Jiang HK, Li YP. Biomechanical evaluation of four different posterior screw and rod fixation techniques for the treatment of the odontoid fractures. Int J Clin Exp Med 2015; 8:8571-8580. [PMID: 26309508 PMCID: PMC4538157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 02/25/2015] [Indexed: 06/04/2023]
Abstract
Problems that screw cannot be inserted may occur in screw-rod fixation techniques such as Harms technique. We compared the biomechanical stability imparted to the C-2 vertebrae by four designed posterior screw and rod fixation techniques for the management of odontoid fractures. A three-dimensional finite element model of the odontoid fracture was established by subtracting several unit structures from the normal model from a healthy male volunteer. 4 different fixation techniques, shown as follows: ① C-1 lateral mass and C-2 pedicle screw fixation (Harms technique); ② C-1 lateral mass and unilateral C-2 pedicle screw fixation combined with ipsilateral laminar screw fixation; ③ Unilateral C-1lateral mass combined with ipsilateral C-1 posterior arch, and C-2 pedicle screw fixation; and ④ Unilateral C1 lateral mass screw connected with bilateral C2 pedicle screw fixation was performed on the odontoid fracture model. The model was validated for axial rotation, flexion, extension, lateral bending, and tension for 1.5 Nm. Changes in motion in flexion-extension, lateral bending, and axial rotation were calculated. The finite element model of the odontoid fracture was established in this paper. All of the four screw-rod techniques significantly decreased motion in flexion-extension, lateral bending, and axial rotation, as compared with the destabilized odontoid fracture complex (P<0.05). There was no statistically significant difference in stability among the four screw techniques. We concluded that the first three fixation techniques are recommended to be used as surgical intervention for odontoid fracture, while the last can be used as supplementary for the former three methods.
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Affiliation(s)
- Lei Li
- Department of Orthopedics, Shengjing Hospital of China Medical UniversityShenyang 110004, China
| | - Wen-Fei Liu
- Department of Orthopedics, Shenyang Orthopedics HospitalShenyang 110044, China
| | - Hong-Kun Jiang
- Department of Pediatrics, The First Affiliated Hospital of China Medical UniversityShenyang 110001, China
| | - Yun-Peng Li
- Department of Orthopedics, Shengjing Hospital of China Medical UniversityShenyang 110004, China
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Emohare O, Dittmer A, Morgan RA, Switzer JA, Polly DW. Osteoporosis in acute fractures of the cervical spine: the role of opportunistic CT screening. J Neurosurg Spine 2015; 23:1-7. [PMID: 25860516 DOI: 10.3171/2014.10.spine14233] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT Recently published data make it possible to generate estimates of bone mineral density (BMD) by using CT attenuation; this innovation can save time and reduce costs. Although advanced age is associated with reduced BMD, especially in patients with a fracture of C-2, relatively few patients ever undergo formal dual x-ray absorptiometry studies. To the authors' knowledge, this is the first study to assess the utility of this technique in elucidating BMD in patients with an acute fracture of the cervical spine. METHODS Patients who presented to a Level I trauma center with an acute fracture of the cervical spine and underwent abdominal (or L-1) CT scanning either at admission or in the 6 months before or after the injury were evaluated. Using a picture-archiving and communication system, the authors generated regions of interest of similar size in the body of L-1 (excluding the cortex) and computed mean values for CT attenuation. The values derived were compared with threshold values, which differentiate between osteoporotic and nonosteoporotic states; age-stratified groups were also compared. RESULTS Of the 91 patients whose data were reviewed, 51 were < 65 years old (mean 43.2 years) and 40 were ≥ 65 years old (mean 80.9 years). The overall mean CT attenuation values (in Hounsfield units [HU]), stratified according to age, were 193.85 HU for the younger cohort and 117.39 HU for the older cohort; the result of a comparison between these two values was significant (p < 0.001). CONCLUSIONS Using opportunistic CT scanning, this study demonstrates the relative frequency of osteoporosis in acute fractures of the cervical spine. It also objectively correlates overall BMD with the known higher frequency of C-2 fractures in older patients. This technique harnesses the presence of opportunistic CT scans of the abdomen, which potentially reduces the need for the extra time and cost that may be associated with dual x-ray absorptiometry scanning.
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Affiliation(s)
| | - Alison Dittmer
- University of Minnesota Medical School, Minneapolis; and
| | - Robert A Morgan
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota
| | - Julie A Switzer
- Orthopaedic Surgery, Regions Hospital, St. Paul;,Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota
| | - David W Polly
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota
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Malagelada F, Tibrewal S, Lucar GA, Jeyaseelan L, Fahmy A, Gonzalez JS. Combined Type II Odontoid Fracture With Axis Anterior Arch Fracture: A Case Report in an Elderly Patient. Geriatr Orthop Surg Rehabil 2015; 6:37-41. [PMID: 26246952 PMCID: PMC4318804 DOI: 10.1177/2151458514554083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Associated fractures of the atlas and axis are frequent, particularly in the elderly patients following a simple low-energy fall. This injury can be easily misdiagnosed on initial plain radiographs, and therefore computed tomography scan is a useful adjunct in patients with a degenerative spine. There is still no consensus as to the optimal treatment of combined axis-atlas fractures, and the majority of authors propose a therapeutic strategy dependent on the odontoid fracture pattern. We describe a combined atlas and axis fracture in a 92-year-old patient who was managed with nonoperative treatment in a rigid collar. The association of C1 anterior arch with a C2 type II odontoid fracture is a rare combination, which to our knowledge has never been reported following nonoperative treatment. There was a good functional outcome at 1-year follow-up with the fracture progressing to a fibrous nonunion of the odontoid process.
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Affiliation(s)
- Francesc Malagelada
- Department of Orhtopaedic and Trauma Surgery, Hospital de Mataró, Mataró, Barcelona, Spain
| | - Saket Tibrewal
- Department of Orthopaedics, The Royal London Hospital, London, United Kingdom
| | - Gustavo A. Lucar
- Department of Orhtopaedic and Trauma Surgery, Hospital de Mataró, Mataró, Barcelona, Spain
| | | | - Amr Fahmy
- Department of Spinal Surgery, Royal National Orthopaedic Hospital, Stanmore, United Kingdom
| | - Jose Sanchez Gonzalez
- Department of Orhtopaedic and Trauma Surgery, Hospital de Mataró, Mataró, Barcelona, Spain
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Betsch MW, Blizzard SR, Shinseki MS, Yoo JU. Prevalence of degenerative changes of the atlanto-axial joints. Spine J 2015; 15:275-80. [PMID: 25277533 DOI: 10.1016/j.spinee.2014.09.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 08/06/2014] [Accepted: 09/15/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Degeneration of the atlantodens and atlanto-axial joints is associated with cervical spine pain and may also be associated with an increased risk of dens fracture. However, there is paucity of literature describing the prevalence of specific degenerative changes in the atlantodens and atlanto-axial facet joints. PURPOSE To document age-related degenerative changes of the cervical spine in a large cohort of patients. STUDY DESIGN/SETTING This is a retrospective cohort study. PATIENT SAMPLE Adult trauma patients were admitted to our Level 1 trauma center. OUTCOME MEASURES Osteoarthritis of the atlantodens and atlanto-axial facet joints of the cervical spine and the presence of intraosseous cyst and calcific synovitis, as determined by computed tomography (CT) scans. METHODS We conducted a retrospective study of 1,543 adult trauma patients who received a cervical spine CT scan. The anterior atlantodens joint interval was measured. The presence or absence of intraosseous cysts and calcific synovitis was recorded. Degeneration of the atlantodens and atlanto-axial facet joints at age intervals was quantified. RESULTS The atlantodens interval narrowed linearly with age (R(2)=0.992, p<.001). The prevalence of intraosseous cysts increased exponentially with age from 4.2% to 37.4%, and calcific synovitis increased from 0% to 11.1%. Intraosseous cyst formation generally began in the second and third decades of life and synovitis in the fifth and sixth decades of life. Facet joints also demonstrated age-related changes; however, the rate of degenerative changes was lower than in the atlantodens joint. CONCLUSIONS To our knowledge, this is the first study that documents specific changes of both atlantodens and atlanto-axial facet joints as a function of age in a large cohort of 1,543 patients. These changes increased exponentially with age and may contribute to pain and limitation in motion. In light of our findings and recent studies demonstrating the association between degeneration and dens fracture in elderly, cervical spine radiographs of elderly patients should be carefully assessed for these changes.
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Affiliation(s)
- Marcel W Betsch
- Department of Orthopaedics and Rehabilitation, Oregon Health and Science University, Portland, OR, USA
| | - Sabina R Blizzard
- Department of Orthopaedics and Rehabilitation, Oregon Health and Science University, Portland, OR, USA
| | - Matthew S Shinseki
- Department of Orthopaedics and Rehabilitation, Oregon Health and Science University, Portland, OR, USA
| | - Jung U Yoo
- Department of Orthopaedics and Rehabilitation, Oregon Health and Science University, Portland, OR, USA.
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Terreaux L, Loubersac T, Hamel O, Bord E, Robert R, Buffenoir K. Odontoid balloon kyphoplasty associated with screw fixation for Type II fracture in 2 elderly patients. J Neurosurg Spine 2015; 22:246-52. [PMID: 25555053 DOI: 10.3171/2014.11.spine131013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Anterior screw fixation is a well-recognized technique that is used to stabilize Type IIB fractures of the odontoid process in the elderly. However, advanced age and osteoporosis are 2 risk factors for pseudarthrosis. Kyphoplasty has been described in the treatment of lytic lesions in C-2. The authors decided to combine these 2 techniques in the treatment of unstable fractures of the odontoid. Two approximately 90-year-old patients were treated for this type of fracture. Instability was demonstrated on dynamic radiography in one patient, and the fracture was seen on static radiography in the other. Clinical parameters, pain, range of motion, 36-Item Short Form Health Survey (SF-36) score (for the first patient), and radiological examinations (CT scans and dynamic radiographs) were studied both before and after surgery. After inflating the balloon both above and below the fracture line, the authors applied a high-viscosity polymethylmethacrylate cement. Some minor leakage of cement was noted in both cases but proved to be harmless. The screws were correctly positioned. The clinical result was excellent, both in terms of pain relief and in the fact that there was no reduction in the SF-36 score. The range of motion remained the same. A follow-up CT scan obtained 1 year later in one of the patients showed no evidence of change in the materials used, and the dynamic radiographs showed no instability. This combination of kyphoplasty and anterior screw fixation of the odontoid seems to be an interesting technique in osteoporotic Type IIB fractures of the odontoid process in the elderly, with good results both clinically and radiologically.
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Affiliation(s)
- Luc Terreaux
- Department of Neurosurgery and Neurotraumatology, Nantes University Hospital; and
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Dreizin D, Letzing M, Sliker CW, Chokshi FH, Bodanapally U, Mirvis SE, Quencer RM, Munera F. Multidetector CT of Blunt Cervical Spine Trauma in Adults. Radiographics 2014; 34:1842-65. [DOI: 10.1148/rg.347130094] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Watanabe M, Sakai D, Yamamoto Y, Nagai T, Sato M, Mochida J. Analysis of predisposing factors in elderly people with type II odontoid fracture. Spine J 2014; 14:861-6. [PMID: 24055610 DOI: 10.1016/j.spinee.2013.07.434] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 05/29/2013] [Accepted: 07/10/2013] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Type II odontoid fracture is the most frequent individual fracture in elderly people. An older person usually sustains a Type II odontoid fracture in a fall from standing or a seated height. A relationship between osteoarthritis in the upper cervical spine and Type II odontoid fracture has been reported. However, to our knowledge, few reports have investigated statistically whether disproportionate degeneration between joints influences the susceptibility to fracture. PURPOSE The purpose of this study was to assess predisposition to Type II odontoid fracture in the elderly. STUDY DESIGN Retrospective review of elderly patients sustained Type II odontoid fracture and other axis fractures. PATIENT SAMPLE Thirty-eight patients aged 65 years and older with axis fractures. OUTCOME MEASURES Evaluation of computed tomography findings by focusing on osteoporosis and the disproportion in degeneration between each of the upper cervical joints (atlantooccipital, atlantoodontoid, and lateral atlantoaxial joints). METHODS Seventeen patients had a Type II odontoid fracture, and 21 patients had other axis fractures. Using the computed tomography findings, we classified osteoporosis at the dens-body junction and the severity of degenerative changes in the atlantoodontoid, atlantooccipital, and lateral atlantoaxial joints as none, mild, moderate, or severe. The proportion of patients with moderate or severe osteoporosis and degenerative changes in each joint and that of patients with disproportionate degenerative changes between joints (difference in grade of ≥2 levels between joints) were compared statistically. The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this article. RESULTS Patients with osteoporosis and with disproportionate degenerative changes between the atlantoodontoid and lateral atlantoaxial joints were significantly more likely to have a Type II odontoid fracture than other axis fractures. These two factors were also assessed in multivariate logistic analysis. The disproportionate degenerative change between the atlantoodontoid and lateral atlantoaxial joint remained significant, even after adjusting for osteoporosis. CONCLUSIONS Older patients with the dens fixed to the atlas because of degeneration of the atlantoodontoid joint and a smooth lateral atlantoaxial joint seem to sustain Type II odontoid fractures because, during a simple fall, the rotation of the head produces torque force on the osteoporotic dens-body junction, which acts as the rotatory center. The presence of the disproportionate osteoarthritic degeneration between the atlantoodontoid and lateral atlantoaxial joints predisposes older people to a Type II odontoid fracture.
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Affiliation(s)
- Masahiko Watanabe
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Yukihiro Yamamoto
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Toshihiro Nagai
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Masato Sato
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
| | - Joji Mochida
- Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
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Lindsey RW. Degenerative changes in the atlanto-dens joint and dens fractures in the elderly: close relatives or just neighbors?: a commentary on an article by Matthew S. Shinseki et al.: "association between advanced degenerative changes of the atlanto-dens joint and presence of dens fracture". J Bone Joint Surg Am 2014; 96:e78. [PMID: 24806024 DOI: 10.2106/jbjs.n.00120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Shinseki MS, Zusman NL, Hiratzka J, Marshall LM, Yoo JU. Association between advanced degenerative changes of the atlanto-dens joint and presence of dens fracture. J Bone Joint Surg Am 2014; 96:712-7. [PMID: 24806007 DOI: 10.2106/jbjs.m.00814] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Dens fractures in elderly patients are often related to issues associated with aging. We examined the association between degenerative changes of the atlanto-dens joint and the risk of dens fracture. METHODS We conducted a retrospective study of trauma patients, fifty-five years of age or older, who had undergone a computed tomography scan of the cervical spine as part of their admission to a single level-I trauma center. There were 1794 patients who met the inclusion criteria; scans were evaluated for all fifty-six who presented with a dens fracture and for a random sample of 736 without a dens fracture. Intraosseous cyst formation, synovitis, and joint space narrowing were recorded from the scans. The prevalence of degenerative changes was compared between patients with and patients without a dens fracture. RESULTS An intraosseous cyst in the dens was found in 16.4% of the patients without a dens fracture and in 64.3% of those with a fracture (p < 0.001). The dens fracture extended through the existing cyst in twenty-four (66.7%) of thirty-six patients with a cyst and a dens fracture. Retro-dens synovitis was present in 4.2% of the patients without a dens fracture and 25.0% of those with a fracture (p < 0.001). After adjustment for age and sex, both cysts (odds ratio [OR] = 7.7, 95% confidence interval [CI] = 4.2 to 14.1) and synovitis (OR = 4.6, 95% CI = 2.1 to 10.0) were significantly associated with dens fracture. CONCLUSIONS Intraosseous dens cysts and retro-dens synovitis were associated with dens fracture; those with a dens fracture were nearly eightfold more likely to have an intraosseous cyst and nearly fivefold more likely to have synovitis compared with those without a dens fracture. Because the atlanto-dens joint is a synovial joint, its degeneration can lead to subchondral cyst formation and synovitis and predispose affected individuals to fracture.
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Affiliation(s)
- Matthew S Shinseki
- Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, OP 31, Portland, OR 97239. E-mail address for J.U. Yoo:
| | - Natalie L Zusman
- Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, OP 31, Portland, OR 97239. E-mail address for J.U. Yoo:
| | - Jayme Hiratzka
- Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, OP 31, Portland, OR 97239. E-mail address for J.U. Yoo:
| | - Lynn M Marshall
- Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, OP 31, Portland, OR 97239. E-mail address for J.U. Yoo:
| | - Jung U Yoo
- Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, OP 31, Portland, OR 97239. E-mail address for J.U. Yoo:
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Huybregts JGJ, Jacobs WCH, Peul WC, Vleggeert-Lankamp CLA. Rationale and design of the INNOVATE Trial: an international cooperative study on surgical versus conservative treatment for odontoid fractures in the elderly. BMC Musculoskelet Disord 2014; 15:7. [PMID: 24400976 PMCID: PMC3893376 DOI: 10.1186/1471-2474-15-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 12/31/2013] [Indexed: 11/25/2022] Open
Abstract
Background Fractures of the odontoid process of the axis are the most common fractures of the geriatric cervical spine. As the population ages, their incidence is expected to increase progressively, as is the number of very old patients (>80 years) with an odontoid fracture. No consensus exists on the optimal treatment (surgical or conservative) and the most relevant outcome parameter (osseous union, fracture stability or clinical outcome). The aim of the INNOVATE (INterNational study on Odontoid frActure Treatment in the Elderly) Trial is to prospectively assess fracture healing and clinical outcome after surgical and conservative treatment for odontoid fractures in the elderly patient, with a specific focus on the very old patient. Methods/Design The trial is an observational study in which eleven centres in five European countries are involved. All patients admitted to one of these centres who meet the selection criteria (≥55 years, acute (<two weeks) type II/III odontoid fracture, no rheumatoid arthritis, no ankylosing spondylitis, no previous treatment for odontoid fracture) are asked to participate. The applied treatment is in accordance with usual care and chosen by the treating surgeon and patient. A cohort of 275 patients will be included. Clinical and radiological follow-up moments are scheduled at 6, 12, 26, 52 and 104 weeks, at which both surgeon and patient will complete Case Record Forms (CRFs). The primary outcome will be a combination of fracture healing and clinical outcome at 52 weeks. Osseous union and fracture stability will be assessed with CT-imaging and dynamic X-ray. Clinical outcome will be scored by the Neck Disability Index (NDI) and correlated to the imaging data. Additionally, predefined subgroup analysis will be carried out (i.e. for patient age and osteoporosis) and prognostic factors will be identified. Discussion Evidence for the optimal treatment for odontoid fractures is lacking. Focusing on both fracture healing and clinical outcome, the results of this study will yield valuable information enabling more rational decision making in the treatment for odontoid fractures in the elderly. Trial registration Netherlands Trial Register NTR3630
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Affiliation(s)
- Jeroen G J Huybregts
- Department of Neurosurgery, Leiden University Medical Centre, PO Box 9600, 2300 RC Leiden, The Netherlands.
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