[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.

[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.

[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.

[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.

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.

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.

Biomechanical study of the atlantoaxial joint after artificial atlanto-odontoid joint arthroplasty.

Objective: To investigate the stability and three-dimensional movements of the atlantoaxial joint after artificial atlanto-odontoid joint (AAOJ) arthroplasty by comparing with a conventional method.

Methods: After anterior decompression, 24 human cadaveric spinal specimens of C0-C3 were randomly divided into two groups: Group A receiving artificial AAOJ arthroplasty; Group B experiencing anterior transarticular screw (ATAS) fixation. Two groups underwent flexibility test in intact and instrumented states.

Short-term clinical observation of the Dynesys neutralization system for the treatment of degenerative disease of the lumbar vertebrae.

Objective: To explore the safety and short-term efficacy of the posterior approach of the Dynesys dynamic neutralization system for degenerative disease of the lumbar vertebrae.

Methods:   From March 2008 to March 2010, 32 cases of degenerative lumbar vertebral disease, 19 men and 13 women, (mean age 58 ± 5.2, range, 43-78 years), were treated with posterior laminectomy and Dynesys internal fixation.

[Clinical analysis of one-stage posterior-anterior operative approach in treating lower cervical spine fracture and dislocation].

Objective: To investigate the clinical effects of one-stage posterior-anterior decompression and internal fixation for the treatment of the severe fractures and dislocations combined with the spinal cord injuries of the lower cervical spine.

Methods: From August 2005 to August 2009, 48 patients (male 28 and female 20, aged from 28 to 62 years with a mean of 39.6 years) with severe fractures and dislocations of lower cervical spine were treated by reduction and internal fixation with one-stage combined cervical anterior plating and posterior lateral mass screws and rod or plate systems.

[Treatment of thoracolumbar vertebral fractures with posterior short segmental pedicle screw fixation and pedicle screw at the fracture level].

Objective: To explore the feasibility and clinical effects of posterior short segmental pedicle screw fixation adding pedicle screw at the fracture level in treatment of thoracolumbar vertebral fractures.

Methods: From September 2005 to September 2007, 82 patients (male 50 and female 32, the age from 18 to 63 years, at mean age of 36 years,the courses of disease from 2 hours to 7 days with an average of 2 days) with thoracolumbar fractures were treated with posterior short segmental pedicle screw fixation adding pedicle screw at the fracture level. According to the AO classification, 25 patients were type A1 fracture, 48 were type A2 and 9 were type B2.

Biomechanical evaluation of stability and three-dimensional movements of the atlantoaxial joint after artificial atlanto-odontoid joint arthroplasty.

Objective: To investigate the stability and three-dimensional movements of the atlantoaxial joint after artificial atlanto-odontoid joint (AAOJ) arthroplasty.

Method: Ten sets of AAOJ implanted in bony specimens from 10 adults were used to test the pull-out strength of the atlas-axis components with a MTS858 Mini Bionix machine. Another twelve human cadaveric specimens including C(0)-C(4) were used to evaluate the three-dimensional movements of C(1)-C(2) under five different conditions in sequence, that is, the complete specimen, anterior decompression, posterior transarticular screws fixation, AAOJ arthroplasty and fatigue test.

Feasibility study on posterior laminar screw fixation techniques in the axis.

Objective: To get morphologic parameters of Chinese adults through observation and measurement on axial laminas, to evaluate the feasibility of placing axial laminar screws and to introduce the technique.

Methods: Relative parameters of 28 sets of fresh Chinese adults'axial specimens, including distance from the superior and inferior entry points of axial laminar screws to the superior margins of axial laminas, superior, middle, inferior thickness and height of the axial laminas, length and angle of the axial laminar screw trajectories, distance from the entry points of axial laminar screws to the transverse foramen and central points of the inferior articular process, were measured with a digital caliper and a goniometer. Data were statistically analyzed.

Posterior cervical spine arthrodesis incorporating C2 laminar screw fixation in the treatment of cervical spine injury.

Objective: To investigate the clinical application and efficacy of an internal fixation technique incorporating C(2) laminar screws for upper cervical spine injury.

Methods: Using a posterior cervical approach, incorporating C(2) laminar screw fixation and bone grafting were performed on 20 patients with cervical spine injury. There were 12 male and 8 female patients, with a mean age of 45.

[Surgical treatment and classification of multiple-level noncontignous thoracolumbar fractures].

Objective: To explore the surgical treatment and classification of multiple-level noncontiguous thoracolumbar fractures.

Methods: From December 2005 to December 2008, 24 patients with multiple-level noncontignous thoracolumbar fractures were treated by surgical operation included 16 males and and 8 females with a mean age of 36 years old ranging from 18 to 63 years. According to the ASIA grade of spinal nerve function there was 1 case in grade A, 2 cases in grade B, 2 cases in grade C, 8 cases in grade D and 11 cases in grade E.

[Application of the pedicle screws for cervicothoracic fracture-dislocation].

Objective: To explore pedicle screw implantation for fracture-dislocation injuries at cervicothoracic junction (C6-T2).

Methods: Pedicle screw implantation was used for twenty-six patients with cervicothoracic fracture-dislocation from May 2001 to Jan 2008. There were 17 males and 9 females with an average of 48.

[Selective treatment of thoracolumbar fracture with posterior monosegmental pedicle screw fixation].

Objective: To explore the clinical effects of posterior monosegmental pedicle screw fixation in selective treatment of thoracolumbar vertebral fractures.

Methods: From June 2005 to June 2008, 28 patients (male 17 and female 11, the age was 19- 60-years-old with an average of 36 years) with thoracolumbar fractures were treated with posterior monosegmental pedicle screw fixation in our department. According to the AO classification, 19 patients with type A1 fracture and 9 with type A2.

[Analysis of complications in scoliosis surgery].

Objective: To analyze the complications occurred in scoliosis surgery and evaluate its prevention strategy.

Methods: From June 2002 to May 2007, 86 cases of idiopathic scoliosis were treated. There were 21 male and 65 female with an average age of 17.