Read by QxMD icon Read

pedicle screw

Masashi Uehara, Jun Takahashi, Shota Ikegami, Hiroki Oba, Shugo Kuraishi, Toshimasa Futatsugi, Takashi Takizawa, Ryo Munakata, Michihiko Koseki, Hiroyuki Kato
BACKGROUND: Reducing the number of screw insertions while maintaining good clinical outcomes can improve the efficiency and cost-effectiveness of scoliosis surgery. However, the optimal minimum number of pedicle screws remains unclear. This study searched for factors to estimate the fewest number of pedicle screws required between end vertebrae in relation to preoperative main thoracic curve flexibility. METHODS: Sixty-nine subjects (4 male and 65 female, mean age: 14...
December 1, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Zhi-Jing Wen, Zheng-Chao Gao, Teng Lu, Yi-Bin Wang, Hui Liang, Xi-Jing He
OBJECTIVE: To systematically evaluate the efficacy of rapid prototyping drill navigation template-assisted pedicle screw fixation and traditional anatomic landmark-based fixation in the treatment of spinal disease by accessing and searching some relevant literatures home and abroad. METHODS: Randomized Controlled Trials (RCTs) and prospective case-control studies or retrospective case-control studies about rapid prototyping drill templates-assisted pedicle screw fixation and traditional anatomic landmark-based fixation for the treatment of spinal disease were searched electronically in PubMed, The Cochrane Library(Issue 5, 2017), Clinical Trial, Google Scholar, Web of Science, CNKI, Wanfang database and VIP database before June 2017...
November 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Nan-Jian Xu, Yun-Lin Chen, Wei-Yu Jiang, Wei-Hu Ma
OBJECTIVE: To explore the short-term efficacy of posterior percutaneous screw fixation combined with local percutaneous endoscopic debridement in treating senile spinal tuberculosis. METHODS: The clinical data of 19 senile patients with spinal tuberculosis underwent surgical treatment from January 2015 to September 2016 were retrospectively analyzed. There were 13 males and 6 females, aged from 60 to 73 years old with an average of (66.2±4.0) years. All patients have been diagnosed with spinal tuberculosis prior to hospitalization with abscess, dead bone formation but no sinus, neurological symptoms, open surgical indications...
November 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Zhen Lai, Shi-Yuan Shi, Jun Fei, Gui-He Han, Sheng-Ping Hu
OBJECTIVE: To investigate the effect of preoperative percutaneous drainage in lumbar tuberculosis with psoas abscess, through compare the clinical efficacy of two different methods. METHODS: Thirty-six patients with lumbar tuberculosis complicated with psoas abscess in corresponding with the inclusion criteria were admitted in Zhejiang Province Traditional Chinese Medicine Hospital from January 2015 to January 2017. The patients were divided into group A and group B according to the different therapeutic methods...
November 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Marco Burkhard, Philipp Fürnstahl, Mazda Farshad
PURPOSE: To evaluate whether 3D-printed vertebrae offer realistic haptic simulation of posterior pedicle screw placement and decompression surgery with normal to osteoporotic-like properties. METHODS: A parameterizable vertebra model was developed, adjustable in cortical and cancellous bone thicknesses. Based on this model, five different L3 vertebra types (α, β, γ1, γ2, and γ3) were designed and fourfold 3D-printed. Four spine surgeons assessed each vertebra type and a purchasable L3 Sawbones vertebra...
December 3, 2018: European Spine Journal
Suomao Yuan, Bin Wei, Yonghao Tian, Jun Yan, Wanlong Xu, Lianlei Wang, Xinyu Liu
Case series study.To report the clinical outcomes of posterior temporary C1-2 fixation for 3-part fracture of the axis (Type II odontoid fracture according to Grauer classification combined with Hangman fracture).The 3-part fracture of the axis is rare and the treatment is controversy.A total of 8 patients with 3-part fracture of the axis were included in this study. X-rays, CT, and MRI prior to surgery were used to evaluate the cervical spine injury. Grauer classification, fracture angulation, and fracture translation were used to evaluate the fracture of dens...
November 2018: Medicine (Baltimore)
Ori Barzilai, Lily McLaughlin, Eric Lis, Anne S Reiner, Mark H Bilsky, Ilya Laufer
BACKGROUND: Cancer patients experience pathological fractures and the typical poor bone quality frequently complicates stabilization. Methods for overcoming screw failure include utilization of fenestrated screws that permit the injection of bone cement into the vertebral body to augment fixation. OBJECTIVE: To evaluate the safety and efficacy of cement augmentation via fenestrated screws. METHODS: A retrospective chart review of patients with neoplastic spinal instability who underwent percutaneous instrumented stabilization with cement augmentation using fenestrated pedicle screws...
December 3, 2018: Operative Neurosurgery (Hagerstown, Md.)
Masashi Uehara, Jun Takahashi, Shota Ikegami, Shugo Kuraishi, Toshimasa Futatsugi, Hiroki Oba, Takashi Takizawa, Ryo Munakata, Michihiko Koseki, Hiroyuki Kato
STUDY DESIGN: Retrospective, single-center, single-surgeon study. OBJECTIVE: This study investigated screw perforation rate according to surface registration accuracy in pedicle screw fixation using a CT-based navigation system for adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: Posterior spinal fusion for scoliosis correction using pedicle screws is widely adopted but carries a risk of serious neurovascular or visceral structure events...
November 30, 2018: Clinical Spine Surgery
Danielle L Julian, Roger D Smith, Alyssa D S Tanaka, Ariel Dubin
Traditional spinal surgery procedures are completed with limited direct visualization. This imposes limitations on the surgeon's ability to place screws into the spine. The Mazor Renaissance robotic system was developed to improve the accuracy of pedicle screw insertion. Current training for this device comes with significant constraints. This suggests that a simulation-based solution may be valuable to the current training. This paper describes efforts to apply the theories of human-system integration (HSI) and instructional system design to define the requirements for a design of a simulator for specific robotic surgery system...
November 30, 2018: Journal of Robotic Surgery
Vetrivel Muralidharan, Ganesh Swaminathan, Devakumar Devadhas, Baylis V Joseph
Background: Lumbar pedicle screw insertion involves a steep learning curve for novice spine surgeons and requires image guidance or navigation. Small volume centers may be handicapped by the lack of cost-effective user-friendly tools for preoperative planning, guidance, and decision making. Objective: We describe a patient-specific interactive software module, pedicle screw simulator (PSS), for virtual preoperative planning to determine the entry point and visualize the trajectories of pedicle screws...
November 2018: Neurology India
Tuan-Mao Guo, Jian Lu, Yan-Li Xing, Guo-Xiong Liu, Hai-Yun Zhu, Lan Yang, Xi-Min Qiao
BACKGROUND: Transforaminal lumbar interbody fusion (TLIF) is an effective treatment of upper lumbar intervertebral disc herniation. However, its clinical efficacy for adjacent segment disc degeneration (ASDD) remains undefined. Therefore, the biomechanical evaluation of ASDD caused by TLIF after pedicle screw fixation (PSF) was explored via a three-dimensional (3D) finite element analysis. METHODS: Computed tomography (CT) images of a healthy male adult volunteer were used in this study...
November 29, 2018: World Neurosurgery
Dongxu Liu, Jianfeng Jiang, Lei Wang, Jie Liu, Zhongmin Jin, Leiming Gao, Yingqi Hua, Zhengdong Cai, Zikai Hua
Hemipelvic prostheses are used to reconstruct the damaged pelvis due to bone tumors and traumas. However, biomechanical properties of the reconstructed pelvis remain unclear, causing difficulties to implant development and prediction of surgical outcome. In this study, a novel adjustable hemipelvic prosthesis for the Type 1-3 pelvis resection was used to reconstruct the intact pelvic ring. Two types of Pedicle Screw Rod Systems were proposed to improve the stability of fixation between the prosthesis and the bone...
November 1, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Asham Khan, Joshua E Meyers, Samantha Yavorek, Timothy E O'Connor, Ioannis Siasios, Jeffrey P Mullin, John Pollina
OBJECTIVE: To study the differences between robot-guided (Mazor X, Mazor Robotics Ltd., Caesarea, Israel) and three-dimensional (3D) computed tomography (CT) navigation (O-arm Surgical Imaging System, Medtronic, Minneapolis, MN) for the insertion of pedicle screws. METHODS: We reviewed the charts of 50 patients who underwent robot-guided pedicle screw insertion (between May 2017 and October 2017) and 49 patients who underwent 3D-CT navigation pedicle screw insertion (between September 2015 and August 2016)...
November 27, 2018: World Neurosurgery
Zoe B Cheung, Daniel H Chen, Samuel J W White, Jun S Kim, Samuel K Cho
OBJECTIVE: Anterior column realignment (ACR) is a new emerging minimally invasive surgical technique in adult spinal deformity (ASD) that has the potential to provide similar corrective ability to traditional posterior approaches. This paper reviews the current literature on the clinical efficacy and safety of ACR and illustrates an additional utilization of this technique in a case of sagittal imbalance following posterior spinal fusion with segmental instrumentation. METHODS: We performed a literature search of all published ACR reports using PubMed, including only clinical papers describing the ACR technique and reporting radiographic and/or clinical outcomes...
November 27, 2018: World Neurosurgery
Jing Feng, Juan Zhou, Mi Huang, Ping Xia, Wei Liu
BACKGROUND: To compare the clinical and radiological outcomes of the surgical correction of Lenke type 1 to 4 scoliosis by using a multilevel Ponte osteotomy procedure with posterior selective segmental pedicle screw constructs or posterior release and selective segmental pedicle screw constructs only in patients with adolescent thoracic idiopathic scoliosis. METHODS: Retrospective analysis of 65 patients, 32 treated with the multilevel Ponte procedure (Group A) and 33 with posterior soft tissue release only (Group B)...
November 29, 2018: Journal of Orthopaedic Surgery and Research
(no author information available yet)
OBJECTIVEProximal junctional kyphosis (PJK) and failure (PJF) are potentially catastrophic complications that result from abrupt changes in stress across rigid instrumented and mobile non-fused segments of the spine (transition zone) after adult spinal deformity surgery. Recently, data have indicated that extension (widening) of the transitional zone via use of proximal junctional (PJ) semi-rigid fixation can mitigate this complication. To assess the biomechanical effectiveness of 3 semi-rigid fixation constructs (compared to pedicle screw fixation alone), the authors performed cadaveric studies that measured the extent of PJ motion and intradiscal pressure changes (ΔIDP)...
October 1, 2018: Journal of Neurosurgery. Spine
(no author information available yet)
OBJECTIVETo avoid jeopardizing an aberrant vertebral artery, there are three common options in placing a C2 screw, including pedicle, pars, and translaminar screws. Although biomechanical studies have demonstrated similar strength among these C2 screws in vitro, there are limited clinical data to address their differences in vivo. When different screws were placed in each side, few reports have compared the outcomes. The present study aimed to evaluate these multiple combinations of C2 screws.METHODSConsecutive adult patients who underwent posterior atlantoaxial (AA) fixation were retrospectively reviewed...
October 1, 2018: Journal of Neurosurgery. Spine
(no author information available yet)
OBJECTIVETranspsoas lateral interbody fusion is one of the lateral minimally invasive approaches for lumbar spine surgery. Most surgeons insert the interbody cage laterally and then insert pedicle or cortical screw and rod instrumentation posteriorly. However, standalone cages have also been used to avoid posterior instrumentation. To the best of the authors' knowledge, the literature on comparison of the two approaches is sparse.METHODSThe authors performed a systematic review and meta-analysis of the available literature on transpsoas lateral interbody fusion by an electronic search of the PubMed, EMBASE, and Scopus databases using PRISMA guidelines...
October 1, 2018: Journal of Neurosurgery. Spine
Wojciech M Glinkowski, Jerzy Narloch
PURPOSE: To evaluate the relationship between cortical Bone Mineral Density (BMD) at pedicle entry points with trabecular BMD of the vertebral body in a spinal fracture. METHODS: Quantitative computed tomography of the thoracolumbar spine was analyzed using dedicated software - QCT Pro (Mindways, Austin, TX). RESULTS: Forty-six patients were evaluated. Among them 36 females were diagnosed with osteoporosis; the remaining 10 randomly selected from the database both males and females served as a control group...
November 9, 2018: Journal of Clinical Densitometry
Hironobu Sakaura, Atsunori Ohnishi, Akira Yamagishi, Tetsuo Ohwada
Study Design: Retrospective cohort study. Purpose: We recently reported that when compared to posterior lumbar interbody fusion (PLIF) using traditional pedicle screw fixation, PLIF with cortical bone trajectory screw fixation (CBT-PLIF) provided favorable clinical outcomes and reduced the incidence of symptomatic adjacent segment pathology, but resulted in relatively lower fusion rates. Since titanium-coated polyetheretherketone (PEEK) cages (TP) could improve and accelerate fusion status after CBT-PLIF, early fusion status was compared between CBT-PLIF using TP and carbon PEEK cages (CP)...
November 29, 2018: Asian Spine Journal
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"