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C1 Fractures

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Experimental study on the mechanical properties of biological hydrogels of different concentrations.

Khurshid Alam, Anwarul Hasan, Muhammad Iqbal, Jamal Umer, Sujan Piya,

BACKGROUND:Biological hydrogels provide a conducive three-dimensional extracellular matrix environment for encapsulating and cultivating living cells. Microenvironmental modulus of hydrogels dictates several characteristics of cell functions such as proliferation, adhesion, self-renewal, differentiation, migration, cell morphology and fate. Precise measurement of the mechanical properties of gels is necessary for investigating cellular mechanobiology ... Read more >>

Technol Health Care (Technology and health care : official journal of the European Society for Engineering and Medicine)
[2020, :]

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Type II odontoid fractures: Complication, mortality, and outcome after posterior C1-C2 fixation and fusion, single institute experience

Gezgin İnan, Murat Gokten, Can Sezer, Aykut Sezer, Abidin Geyik, Sedat Cagli,

<title>Abstract</title> <p> Background The aim of the present study was to evaluate long term C1-C2 fusion rates and functional outcomes in patients with type II odontoid fractures treated with posterior fixation with polyaxial C1 lateral mass and C2 pars screws. Methods A total of 32 patients were retrospectively ... Read more >>

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Neglected Odontoid Fracture During Growth.

Joon Sung Kim, Bo Young Hong, Seong Hoon Lim,

Ann Rehabil Med (Annals of rehabilitation medicine)
[2020, 44(1):99-100]

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Motion-Preserving Navigated Primary Internal Fixation of Unstable C1 Fractures.

Shanmuganathan Rajasekaran, Dilip Chand Raja Soundararajan, Ajoy Prasad Shetty, Rishi Mugesh Kanna,

Study Design:Prospective observational study. Purpose:To assess the safety, efficacy, and benefits of computed tomography (CT)-guided C1 fracture fixation. Overview of Literature:The surgical management of unstable C1 injuries by occipitocervical and atlantoaxial (AA) fusion compromises motion and function. Monosegmental C1 osteosynthesis negates these drawbacks and provides excellent functional outcomes. Methods:The patients ... Read more >>

Asian Spine J (Asian spine journal)
[2020, :]

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[Application of transarticular C1/2 screws connected with C1 lateral mass screws in a rod-screw system].

Ali Harati, Paul Oni,

Fractures of the second cervical vertebra with involvement of the odontoid process can mostly be treated conservatively by immobilization. In the case of high-grade unstable fractures and pseudarthrosis dorsal C1/2 spondylodesis should be considered.Based on established atlantoaxial osteosynthesis techniques for dorsal C1/2 spondylodesis, a polyaxial screw-rod system with C1/2 transarticular screws ... Read more >>

Unfallchirurg (Der Unfallchirurg)
[2020, :]

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Establishment and characterization of patient-derived cancer models of malignant peripheral nerve sheath tumors.

Rieko Oyama, Fusako Kito, Mami Takahashi, Emi Hattori, Rei Noguchi, Yoko Takai, Marimu Sakumoto, Zhiwei Qiao, Shunichi Toki, Masato Sugawara, Yoshikazu Tanzawa, Eisuke Kobayashi, Fumihiko Nakatani, Shintaro Iwata, Akihiko Yoshida, Akira Kawai, Tadashi Kondo,

Background:Malignant peripheral nerve sheath tumors (MPNSTs) are a rare subtype of soft-tissue sarcoma, derived from a peripheral branch or the sheath of the sciatic nerve, brachial plexus, or sacral plexus. The clinical outcomes for MPNST patients with unresectable or metastatic tumors are dismal, and novel therapeutic strategies are required. Although ... Read more >>

Cancer Cell Int. (Cancer cell international)
[2020, 20:58]

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Posterior Arch Screw for Type II Odontoid Fracture: An Alternative Procedure.

Ragurajaprakash Kirubakaran, Junya Hanakita, Toshiyuki Takahashi, Manabu Minami, Yoshitaka Tsujimoto, Ryo Kanematsu,

BACKGROUND/OBJECTIVE:Atlantoaxial fusion procedures may be difficult in situations such as high-riding vertebral artery, a narrow C2 pedicle, and the presence of ponticulus posticus-arcuate foramen. With respect to vertebral artery (VA) anomalies, persistent first intersegmental artery, extracranial origin of the posterior inferior cerebellar artery at the C1-C2 level, and fenestration of ... Read more >>

World Neurosurg (World neurosurgery)
[2020, :]

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Management of neglected complex hangman's fracture by reforming the C2 pedicle: new innovative technique of motion preservation at the C1-2 joint in 2 cases.

Pankaj K Singh, Mohit Agrawal, Dattaraj Sawarkar, Amandeep Kumar, Satish Verma, Ramesh Doddamani, P Sarat Chandra, Shashank S Kale,

Hangman's fracture, also known as traumatic spondylolisthesis of the axis, causes widening of the neural canal and thus a low rate of neurological deficits. This low rate is one of the reasons it is neglected and patients present with late neurological deficits. In an effort to preserve motion at the ... Read more >>

J Neurosurg Spine (Journal of neurosurgery. Spine)
[2020, :1-8]

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A possible novel technique for intraoperative imaging of the vertebral artery during arthrodesis of the upper cervical spine.

O Pavlov, N Mirchev, R Behr,

In elderly, the fractures in C1-C2 are a common entity. Poor bone quality and wide range of motion hamper the natural bone fusion, thus making surgery often the only possible way to deal with the underlying pathology. The proximity to important neurovascular structures represents the stabilization in this segment a ... Read more >>

Med. Hypotheses (Medical hypotheses)
[2020, 140:109641]

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Traumatic posterior Atlanto-axial dislocation: case report of an atypical C1-C2 dislocation with an anterior arch fracture of C1.

Soufiane Ghailane, Mohammad A Alsofyani, Vincent Pointillart, Houssam Bouloussa, Olivier Gille,

BACKGROUND:An atypical case of a traumatic posterior C1-C2 dislocation with an anterior arch fracture of C1 is reported. A novel conservative treatment for this rare lesion is described. CASE PRESENTATION:An eighty-nine-year-old male fell off a ladder at home and presented with an acute traumatic cervical spine trauma, which we believe ... Read more >>

BMC Musculoskelet Disord (BMC musculoskeletal disorders)
[2019, 20(1):612]

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Traumatic Atlanto-occipital Dislocation: Analysis of 15 Survival Cases With Emphasis on Associated Upper Cervical Spine Injuries.

Dong-Gune Chang, Jong-Beom Park, Kyung-Jin Song, Heui-Jeon Park, Whoan Jeang Kim, Jun Young Heu,

STUDY DESIGN:Retrospective case analyses. OBJECTIVE:The aim of this study was to investigate the incidence and characteristics of associated upper cervical spine injuries in 15 survival cases of traumatic atlanto-occipital dislocation (AOD). SUMMARY OF BACKGROUND DATA:Traumatic AOD is a rare and generally fatal injury. Information regarding associated upper cervical spine injuries ... Read more >>

Spine (Spine)
[2020, :]

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Does isolated atlantoaxial fusion result in better clinical outcome compared to occipitocervical fusion?

Katharina E Wenning, Martin F Hoffmann,

BACKGROUND:The C0 to C2 region is the keystone for range of motion in the upper cervical spine. Posterior procedures usually include a fusion of at least one segment. Atlantoaxial fusion (AAF) only inhibits any motion in the C1/C2 segment whereas occipitocervical fusion (OCF) additionally interferes with the C0/C1 segment. The ... Read more >>

J Orthop Surg Res (Journal of orthopaedic surgery and research)
[2020, 15(1):8]

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Os Odontoideum in Children.

Daniel J Hedequist, Andrew Z Mo,

Os odontoideum is a rare entity of the second cervical vertebra, characterized by a circumferentially corticated ossicle separated from the body of C2. The ossicle is a distinct entity from an odontoid fracture or a persistent ossiculum terminale. The diagnosis may be made incidentally on imaging obtained for the workup ... Read more >>

J Am Acad Orthop Surg (The Journal of the American Academy of Orthopaedic Surgeons)
[2020, 28(3):e100-e107]

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Management and results in periprosthetic tibial fracture after total knee arthroplasty: Two-center 15-case retrospective series at 2 years' follow-up.

Camille Bauer, Bogdan Zaharia, Florent Galliot, Jauffrey Parot, Fayçal Houfani, Julien Mayer, Didier Mainard,

INTRODUCTION:Periprosthetic tibial fracture after total knee arthroplasty (TKA) is rare, but jeopardizes implant survival. The main objective of the present study was to assess treatment efficacy, on the hypothesis that surgery provides good long-term results. MATERIAL AND METHODS:A two-center retrospective study included 15 patients (6 male, 9 female: mean age, ... Read more >>

Orthop Traumatol Surg Res (Orthopaedics & traumatology, surgery & research : OTSR)
[2020, :]

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Differentiation of Cervical Spine Osteoradionecrosis and Bone Metastasis After Radiotherapy Detected by Bone Scan in Patients With Nasopharyngeal Carcinoma: Role of Magnetic Resonance Imaging.

Xi Zhong, Li Li, Bingui Lu, Hainan Zhang, Lu Huang, Xinjia Lin, Jiansheng Li, Jian Zhang,

Background: Osteoradionecrosis (ORN) of the cervical spine is a serious complication after radiotherapy (RT), which may show increased radiotracer uptake on a bone scan (BS) and be mistaken as metastasis. We aimed to assess the value of magnetic resonance imaging (MRI) in the differentiation of cervical spine ORN from bone ... Read more >>

Front Oncol (Frontiers in Oncology)
[2020, 10:15]

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Cervico-stylo-mandibular complex fracture: a critical review of literature along with a protocol to recognize and proposal of a new classification.

Nanda Kishore Donepudi, Vinayak Gourish Naik, Kirthi Kumar Rai,

Fractures of the styloid process of the temporal bone may occur with or without an obvious relation to trauma. The incidence of either isolated styloid process fracture or in combination with mandibular fractures is rare, and such occurrences are often misdiagnosed or neglected. A fractured styloid when displaced may impinge ... Read more >>

J Korean Assoc Oral Maxillofac Surg (Journal of the Korean Association of Oral and Maxillofacial Surgeons)
[2019, 45(6):302-308]

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Epidemiology and management of atlas fractures.

Nora Fiedler, Ulrich J A Spiegl, Jan-Sven Jarvers, Christoph Josten, Christoph E Heyde, Georg Osterhoff,

PURPOSE:The purpose of this study was to gain new insights into the epidemiologic characteristics of patients with atlas fractures and to retrospectively evaluate complication rates after surgical and non-surgical treatment. METHODS:In a retrospective study, consecutive patients diagnosed with a fracture of the atlas between 01/2008 and 07/2018 were analyzed. Data ... Read more >>

Eur Spine J (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)
[2020, :]

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Computerized Tomography-Based Morphometric Analysis of Odontoid in 100 Egyptian Patients.

Nirmal D Patil, Mohammad Essam, Raafat Kamal Ragab, Hesham Elsaghir,

Background:There is still no consensus in the literature regarding the use of 1 screw or 2 screws. A number of studies have proved ethnic variations in the morphometry of the odontoid. There is no literature on the morphometry of odontoid in Egyptian patients. Methods:Computerized tomography (CT) scans of the head ... Read more >>

Int J Spine Surg (International Journal of Spine Surgery)
[2020, 14(1):59-65]

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Surgical outcomes of elderly patients aged more than 80 years with distal radius fracture: comparison of external fixation and locking plate.

Yu-Yi Huang, Tung-Yi Lin, Chien-Hao Chen, Ying-Chao Chou, Chun-Yi Su,

BACKGROUND:To compare the outcomes after surgical intervention, including external fixation (EF) with the optional addition of K-pins or open reduction and internal fixation (ORIF) with a volar locking plate (VLP), in patients with distal radius fracture aged > 80 years. METHODS:We reviewed 69 patients with a distal radius fracture aged > 80 years who ... Read more >>

BMC Musculoskelet Disord (BMC musculoskeletal disorders)
[2020, 21(1):91]

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C1-C2 posterior screw fixation in atlantoaxial fractures revisited: technical update based on 127 cases.

Niels Buchmann, Claudia Schweizer, Jan S Kirschke, Anna Rienmüller, Jens Gempt, Florian Ringel, Bernhard Meyer, Yu- Mi Ryang,

INTRODUCTION:Posterior fusion of traumatic odontoid fractures by C1 lateral mass and C2 isthmic screws (modified Harms-Goel technique) is a viable alternative to transarticular screw fixation due to its universal applicability. This retrospective study reports on a series of 127 patients. MATERIAL AND METHODS:Our clinical database was screened for patients with ... Read more >>

Eur Spine J (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)
[2019, :]

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Tulip-Screw Head Disjunction from Posterior C2 Fracture Fixation Instrumentation.

Halle E K Burley, Darius S Ansari, Alexander von Glinski, Ryan Goodmanson, Benjamin Schell, Jens R Chapman, Rod J Oskouian,

This report presents an unusual case of instrumentation failure after posterior fixation of a C2 fracture and reviews currently available treatment alternatives. The patient, a 53-year-old female, initially presented to the emergency department at an outside facility with acute alcohol intoxication and acute neck pain following a fall from a ... Read more >>

Case Rep Orthop (Case reports in orthopedics)
[2020, 2020:5824383]

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Rare and Unique Case of Midline Anterior Arch of Atlas Non-formation Mimicking Jefferson Type 1 Fracture.

Srijit Das, Kamalanathan Palaniandy, Azizi Abu Bakar, Zamzuri Idris, Jafri M Abdullah,

Cervical spine injuries are rare occurrences in children, especially the congenital anomalies of the atlas vertebra. Any injury involving the craniovertebral junction such as Jefferson fracture, is a valid cause for alarm due to the complex nature of the craniovertebral junction and the morbidity associated with it. We report the ... Read more >>

Cureus (Cureus)
[2020, 12(2):e6850]

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Cervical pedicle screws fixation treatment the atlantoaxial instability of axis burst fractures

Denglu Yan, Zaiheng Zhang, Zhi Zhang,

<title>Abstract</title> <p> <bold>Background</bold>Although the cervical pedicle screws and rods were used for atlantoaxial instable, the axis fractures still a challenge for spine surgeon.<bold>Objective</bold>This study was to evaluated the clinical outcomes of axis burst fractures had C1C3 pedicles screws fixation treatment.<bold>Methods</bold>From June 2014 to July 2018, 45 patients with ... Read more >>

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[Comparative study of percutaneous bridging plate and retrograde suprapubic intramedullary screw fixation for anterior pelvic ring fracture].

Wei-Bin Wang, Xin-Hua Yuan, Yi Zheng, Qing-Song Fu, Hai-Ting Wu, Qing-Jiang Pang,

OBJECTIVE:To compare the effect of percutaneous bridging plate and retrograde suprapubic intramedullary screw in the treatment of anterior ring fracture of pelvis. METHODS:From January 2013 to June 2017, 40 patients with unstable pelvic fractures involving anterior ring were analyzed retrospectively. According to the fixation method, they were divided into two ... Read more >>

Zhongguo Gu Shang (Zhongguo gu shang = China journal of orthopaedics and traumatology)
[2020, 33(1):47-52]

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Removal of organics from shale gas fracturing flowback fluid using expanded granular sludge bed and moving bed biofilm reactor.

Yu Sun, Liang Huang, Changmiao Lai, Huiqiang Li, Ping Yang,

Shale gas fracturing flowback fluid contains various degradation difficulty organic compounds after hydraulic fracturing. A hybrid treatment method was developed for treating flowback and produced water (FPW) using pre-treatment (NaClO) followed by the expanded granular sludge bed (EGSB) and moving bed biofilm reactor (MBBR). Gas chromatography-mass spectrometry (GC-MS) was employed ... Read more >>

Environ Technol (Environmental technology)
[2020, :1-11]

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