Simultaneous Traumatic Fractures of the Atlas and Axis: Presentation, Management, and Outcomes from a Series of 103 Consecutive Patients.

Background: Simultaneous fractures of C1 and C2 are increasingly common, but contemporary series are limited in their evaluation.

Methods: All patients with traumatic fractures of both C1 and C2 admitted to an academic trauma center from 2012 to 2022 were retrospectively analyzed. Multivariable regression was used to identify characteristics relevant to management and outcomes.

Traumatic posterior atlantoaxial dislocation without an associated fracture: a PRISMA-compliant case-based systematic review and meta-analysis.

Traumatic posterior atlantoaxial dislocation (TPAD) without an associated fracture is a rare and challenging spinal injury. This PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses)-compliant case-based systematic review and meta-analysis aimed to comprehensively explore TPAD, covering clinical presentation, diagnosis, treatment, and clinical and radiological outcomes. Following the presentation of a case of TPAD without an associated fracture, we conducted a systematic search of electronic databases, including Scopus, PubMed, and Web of Science, from inception through October 2023, without language restrictions.

Boron-Doped Nano Hydroxyapatite Grafts for Bone Regeneration in Rat Mandibular Defects.

The aim of this study was to evaluate the potential effects of boron-doped nano hydroxyapatite grafts on craniofacial bone regeneration in critical bone defects in the mandibular corpus of rats, in terms of scintigraphic and histopathological aspects. Forty Wistar albino rats, with an average weight of 200-220 g, aged 16-18 weeks, and all male, were used in the study. The rats were randomly assigned to five groups, each containing 8 rats, as follows: group C1 (no procedure applied to the mandible), group C2 (surgical defect created in the mandible but no treatment applied), group nHA (nano hydroxyapatite applied to the surgical defect area), group nHA + B1 (nano hydroxyapatite + 1% boron applied to the surgical defect area), and group nHA + B2 (nano hydroxyapatite + 2% boron applied to the surgical defect area).

Conservative treatment for traumatic atlantoaxial joint infra-anterior dislocation complicating odontoid fracture in young children: A case series.

Purpose: The purpose of this study is to retrospectively analyze children treated conservatively in our hospital to explore the clinical characteristics of children with traumatic atlantoaxial joint infra-anterior dislocation complicating odontoid fracture and the therapeutic effects of treatment.

Methods: Patients with atlantoaxial joint infra-anterior dislocation complicating odontoid fracture received conservative treatment, which comprised three steps: cervical traction (2 weeks), plaster fixation (2 months), and brace fixation (3 months).

Results: We treated three patients (boy:girl = 0:3, mean age = 2.

Navigated Osteosynthesis for Unstable Atlas Fractures: Technical Note and Case Series.

Objective: Fractures of the atlas are typically considered stable or unstable based on the integrity of the transverse ligament. Whereas stable Jefferson burst fractures can be treated nonoperatively, unstable fractures with disruption of the transverse ligament often require surgical intervention. Atlas osteosynthesis has been proposed as a motion-preserving alternative to atlantoaxial fusion.

[Comparison of the stability of dual INFIX and INFIX combined with sacroiliac screw fixation for C1 type pelvic fractures].

Objective: To evaluate the biomechanical stability of dual anterior subcutaneous internal fixation (INFIX) in pelvic C1 fractures by finite element analysis, and to compare it with INFIX combined with sacroiliac screws to determine whether it is sufficient to replace the combined fixation of anterior and posterior rings.

Methods: The pelvic CT data of a 43-year-old female volunteer were imported into the computer and the normal pelvic model and pelvic C1 fractures model were constructed using Mimics, Workbench and other software. The latter was fixed with dual INFIX and INFIX combined with sacroiliac screws, respectively.

Clinical and radiological outcomes of the SL-Plus stem with a minimum 10-year follow-up: A retrospective study.

Purpose: The SL-Plus cementless stem was introduced in 1993 as an evolution of the Alloclassic® stem with some modifications. The aim of this study was to analyse if these modifications have any influence in clinical and radiological outcomes at minimum 10-year follow-up.

Methods: Sixty-eight consecutive implants (64 patients) were retrospective evaluated.

Demographics in the context of health-care delivery for C1 and C2 fractures.

Introduction: Atlas and axis fractures are the most severe cervical fractures which may result in complete paralysis or death. The purpose of the current study is to identify disparities regarding length of stay (LOS), mortality, and demographic factors in patients with the most serious cervical spine fractures utilizing a nationally representative database.

Materials And Methods: The Nationwide Emergency Department Sample was utilized to provide a representative sample for patients with a primary diagnosis of C1 or C2 fracture presenting to emergency departments in years from October 2015 to December 2019.

Navigation-assisted occipitocervical fixation and decompression in a patient with polyostotic fibrous dysplasia.

Fibrous dysplasia (FD) is a rare skeletal disorder characterized by the replacement of normal bone with fibrous connective tissue, leading to abnormal bone formation. This case report details the successful treatment of a 61-year-old woman with FD at the craniovertebral junction (CVJ). The patient, who had a history of intracranial meningioma and had already been diagnosed with FD, experienced worsening gait disturbance and muscle weakness following a fall.

Severe multiple injuries in a 15-year-old boy with pelvic fracture complete anterior dislocation of the sacroiliac joint and rupture of the internal and external iliac arteries: A case report of a rare injury.

Rationale: Anterior dislocation of the sacroiliac joint combined with pelvic fractures is relatively rare in clinical practice. It is often associated with hemodynamic instability and severe injuries to other regions, resulting in a complex condition, prolonged treatment duration, and high rates of mortality and disability. However, there are few reports in the literature describing the diagnosis and treatment of anterior dislocation of the sacroiliac joint.

Odontoid Fractures: A Review of the Current State of the Art.

Odontoid fractures (OFs) represent up to 15% of all cervical fractures encountered and present most commonly amongst elderly patients, typically in the setting of low energy trauma such as falls. The Anderson and D'Alonzo classification and Roy-Camille subtype description are the most clinically noteworthy descriptions of OFs used. Even though most patients will not present with neurological injury, mechanical instability can occur with type II and type III (Anderson and D'Alonzo) fractures, particularly if the transverse ligament of the atlas is ruptured; however, this is very rare.

Posterior Reduction and Temporary Fixation Through Intermuscular Approach for Odontoid Fracture.

Background And Objective: Posterior reduction and temporary fixation (PRTF) through open approach can effectively avoid the loss of C1-C2 motion caused by posterior atlantoaxial fusion in the treatment of odontoid fracture. PRTF through intermuscular approach can preserve the integrity of the paravertebral muscle. However, its contribution to the preservation of C1-C2 rotation remains unassessed in the context of fresh odontoid fractures.

Rotation Preserving Fixation for the Treatment of C1 Burst Fracture Combined With Type II Odontoid Fracture: 2 Case Reports and Literature Review.

Objective: This study aimed to evaluate the clinical feasibility and effectiveness of a monoaxial screw-rod system and anterior screw fixation for C1 and type II odontoid fractures.

Methods: We conducted a retrospective review of 2 consecutive patients with acute C1 and Anderson-D'Alonzo type II odontoid fractures. Both patients underwent treatment using a posterior monoaxial screw-rod system and anterior screw fixation.

Halo Vest Immobilization: Is It Still a Valid Treatment for Atlantoaxial Fractures?

Background: Atlantoaxial injuries pose a significant threat to morbidity and mortality. This retrospective study aims to analyze clinical and radiologic results, failure rates, and complications in a series of patients treated with a halo vest, validating the effectiveness of this device through long-term follow-up.

Methods: This study reviewed adult patients with acute upper cervical spine injuries treated with halo vest immobilization from 1994 to 2022.

Chemical characteristics of sand barriers are accelerated degradation by ultraviolet irradiation and water.

The implementation of sand barriers measures constitutes a crucial element in desertification control, providing a solid theoretical foundation for the future application and pretreatment of sand barriers in production practices. To address the specific damage types predominant in desert environments, we executed simulations of ultraviolet irradiation and rainfall phenomena on mechanical sand barriers in sandy areas and also inspected the variations in chemical properties during accelerated aging processes. The findings unequivocally demonstrate that: (1) The synergistic impact of ultraviolet irradiation and water accelerated the deformation and fracturing of the sand barriers, thereby causing a partial degradation of its chemical properties and conspicuous lignin oxidation; (2) The fissure of the sand barrier deepened, resulting in structural alterations.