Biomechanical study of anterior transpedicular root screw intervertebral fusion system of lower cervical spine: a finite element analysis.

The cervical anterior transpedicular screw (ATPS) fixation technology can provide adequate stability for cervical three-column injuries. However, its high risk of screw insertion and technical complexity have restricted its widespread clinical application. As an improvement over the ATPS technology, the cervical anterior transpedicular root screw (ATPRS) technology has been introduced to reduce the risk associated with screw insertion.

[Feasibility of a novel type of complex anterior cervical fixation by using Mimics software].

Objective: To investigate the feasibility of mimics software in analyzing a new type of complex anterior cervical fixation -- anterior transpedicular screw fixation+zero notch internal fixation.

Methods: From January 2021 to September 2022, 50 normal pedestrians who underwent cervical spine CT scanning were selected for C-C segment scanning, including 27 males and 23 females, aged from 25 to 65 years old with an average of (46.0 ± 9.

Measurement of anatomical parameters of anterior transpedicular root screw intervertebral fusion system of cervical spine.

Objective: This study aims to investigate the feasibility of the anterior transpedicular root screw (ATPRS) intervertebral fusion system for the cervical spine and provide a basis for the design of the ATPRS intervertebral fusion system.

Methods: A total of 60 healthy adult cervical spine CT images examined from our hospital were selected, including 30 males and 30 females, with an average age of 39.6 ± 4.

Clinical Outcomes of Open-Door Laminoplasty Combined with Bilateral Lateral Mass Screw Fixation for Multi-Level Cervical Spinal Stenosis with Traumatic Cervical Instability and Spinal Cord Injury: A Retrospective Study.

Objectives: The prevalence of multi-level cervical spinal stenosis complicated with traumatic cervical instability and spinal cord injury (MCSS-TCISCI) is low, and the optimal surgical approach remains unclear. Open-door laminoplasty combined with bilateral lateral mass screw fixation (ODL-BLMSF) is a relatively new surgical technique; however, its clinical effectiveness in managing MCSS-TCISCI has not been well-established. This study aims to assess the clinical value of ODL-BLMSF against MCSS-TCISCI.

Anatomical and Imaging Study on the Optimum Entry Point and Trajectory for Anterior Transpedicular Root Screw Placement into the Lower Cervical Spine.

Objective: To study the optimum entry point and trajectory for anterior transpedicular root screw (ATPRS) placement into the lower cervical spine (LCS), so as to provide a basis for clinical application.

Methods: A retrospective analysis of cervical CT images of patients who underwent cervical CT examination in the Spinal Surgery of Ningbo No. 6 Hospital from January 2020 to August 2021 was conducted.

Biomechanical analysis of atlantoaxial intraarticular fusion cages with posterior pedicle screws fixation using finite element method.

Background: Cadaveric biomechanical studies indicated that atlantoaxial intraarticular fusion cages with posterior pedicle screws fixation could increase the multi-axial rigidity. However, the stress distribution of the fixation construct is still unclear.

Methods: From computed tomography images, a nonlinear intact three-dimensional C0-2 finite element model was developed and validated.

[Minimally invasive direct lateral approach debridement, interbody bone grafting, and interbody fusion combined with posterior percutaneous pedicle screw fixation for lumbar spinal tuberculosis].

Objective: To investigate the clinical efficacy and superiority of direct lateral interbody fusion combined with posterior percutaneous screw fixation in the treatment of lumbar tuberculosis.

Methods: From June 2013 to August 2016, the clinical data of 83 patients with lumbar tuberculosis were retrospectively analyzed, including 55 males and 28 females, aged from 27 to 72 (49.5±13.

Effectiveness of 2 Types of Drill Templates for Cervical Anterior Transpedicular Screw Placements: A Comparative Study.

Objective: To evaluate effectiveness of regular and modified drill templates used to guide cervical anterior transpedicular screw (ATPS) placement.

Methods: This study included 15 adult cadaveric specimens. Computed tomography images were imported into Mimics software.

[Effect of posterior osteotomy on the sagittal parameters of the spinopelvis in patients with lumbar degenerative kyphosis].

Objective: To investigate the influence of posterior osteotomy on spinopelvic parameters in lumbar degenerative kyphosis (LDK) patients.

Methods: The clinical data of 21 patients with lumbar degenerative kyphosis who underwent osteotomy from January 2012 to December 2015 were retrospectively analyzed. There were 5 males and 16 females, aged from 55 to 76 years with an average of (66.

A Deep Supervised Learning Framework for Data-Driven Soft Sensor Modeling of Industrial Processes.

Deep learning has been recently introduced for soft sensors in industrial processes. However, most of the existing deep networks, such as stacked autoencoder, are pretrained in a layerwise unsupervised way to learn feature representations for the raw input data itself. For soft sensors, it is necessary to extract quality-relevant features for quality prediction.

[Efficacy of bilateral sagittal cross percutaneous kyphoplasty for preventing recurrent fracture of the cemented vertebrae].

Objective: To explore the efficacy of bilateral sagittal cross percutaneous kyphoplasty(PKP) for preventing recurrent fracture of the cemented vertebrae.

Methods: From January 2017 to June 2017, 85 patients with single-segment osteoporotic vertebral compression fractures(OVCFs) were treated by bilateral sagittal cross PKP(cross group). There were 35 males and 50 females with an average age of (70.

[Digital modeling and analysis of the applicability of backward rotation method in lumbar kyphoplasty with unilateral puncture].

Objective: The 3D model of lumbar spine was established by using Mimics software. To observe the applicability and needling parameters of lumbar vertebral kyphoplasty with unilateral puncture by backward rotation method using simulated puncture.

Methods: Twenty-four patients (12 males and 12 females) with osteoporotic thoracic fracture in the first time and no signs of lumbar misalignment and bone destruction were scanned by spiral CT on the lumbar spine.

[French door segmented laminectomy decompression for severe cervical ossification of posterior longitudinal ligament complicated with spinal cord injury].

Objective: To evaluate the clinical effects of French door segmented laminectomy decompression for severe cervical OPLL complicated with spinal cord injury.

Methods: The clinical data of 38 patients with serious cervical OPLL complicated with spinal cord injury were retrospectively analyzed and these patients were treated with French door segmented laminectomy decompression and internal fixation from June 2012 to June 2014. There were 25 males and 13 females, aged from 42 to 78 years with an average of 58.

An RCT study on the feasibility of anterior transpedicular screw fixation in the cervicothoracic junction.

Study Design: We evaluated the trajectory and the entry points of anterior transpedicular screws (ATPS) in the cervicothoracic junction (CTJ).

Objective: This study aimed at investigating the feasibility of ATPS fixation in the CTJ. Application of an ATPS in the lower cervical spine has been reported; however, there were no reports exploring the feasibility of anterior transpedicular screw fixation in the CTJ.

Biotransformation on the triterpenoid saponin of Ardisia gigantifolia by Aspergillus avenaceus AS 3.4454.

Compound 1, a triterpenoid saponin from Ardisia gigantifolia Stapf. showing potential anti-tumor activity, was transformed into three derivatives (2-4) by Aspergillus avenaceus 3.4454.

Two new triterpenoid saponins obtained by microbial hydrolysis with Alternaria alternata AS 3.6872.

Compound 1, a triterpenoid saponin from Ardisia gigantifolia Stapf showing potential anti-tumour activity, was hydrolysed into two deglycosyl derivatives (2 and 3) by Alternaria alternata AS 3.6872. Both these derivatives are new compounds.

[Treatment of flexion-distraction thoracolumbar fractures by postural reduction with instrumental reduction].

Objective: To study the curative effect of postural reduction with instrumental reduction in treatment of flexion-distraction thoracolumbar fractures.

Methods: A retrospective study was performed on 43 patients with single thoracolumbar flexion-distraction fractures admitted from August 2009 to August 2011, included 28 males and 15 females with an average age of 44 years old (34 to 56 years old). All patients were treated with postural reduction with instrumental reduction.

Function-preserving reduction and fixation of unstable Jefferson fractures using a C1 posterior limited construct.

Study Design: This is a retrospective, clinical, and radiologic study of posterior reduction and fusion of the C1 arch in the treatment of unstable Jefferson fractures.

Objective: The aim of the study was to describe a new motion-preserving surgical technique in the treatment of unstable Jefferson fracture.

Summary Of Background Data: The management of unstable Jefferson fractures remains controversial.

Unstable atlas fracture treatment by anterior plate C1-ring osteosynthesis using a transoral approach.

Study Design: A retrospective study was conducted to evaluate anterior plate fixation of unstable atlas fractures using a transoral approach.

Objective: To further investigate the safety and efficacy of this surgical technique, as there is currently a paucity of available data. While most atlas fractures can be managed by external immobilization with favorable results, surgery is usually preferable in highly unstable cases.

Accuracy and complications associated with the freehand C-1 lateral mass screw fixation technique: a radiographic and clinical assessment.

Object: The aims of this study were to evaluate a large series of posterior C-1 lateral mass screws (LMSs) to determine accuracy based on CT scanning findings and to assess the perioperative complication rate related to errant screw placement.

Methods: Accuracy of screw placement was evaluated using postoperative CT scans obtained in 196 patients with atlantoaxial instability. Radiographic analysis included measurement of preoperative and postoperative CT scans to evaluate relevant anatomy and classify accuracy of instrumentation placement.

[Clinical application of centerpiece titanium plate fixation in open door laminoplasty].

Objective: To explore the clinical application of Centerpiece titanium plate fixation in open door laminoplasty.

Methods: From January 2009 to December 2010,25 patients with cervical spinal stenosis were treated by open door laminoplasty with Centerpiece titanium plate fixation. There were 16 males and 9 females,with a mean age of (57.