9,073 results match your criteria posterior sagittal


Patient outcomes after circumferential minimally invasive surgery compared with those of open correction for adult spinal deformity: initial analysis of prospectively collected data.

J Neurosurg Spine 2021 Sep 24:1-12. Epub 2021 Sep 24.

1Department of Neurosurgery, University of California, San Francisco, San Francisco, California.

Objective: Circumferential minimally invasive spine surgery (cMIS) for adult scoliosis has become more advanced and powerful, but direct comparison with traditional open correction using prospectively collected data is limited. The authors performed a retrospective review of prospectively collected, multicenter adult spinal deformity data. The authors directly compared cMIS for adult scoliosis with open correction in propensity-matched cohorts using health-related quality-of-life (HRQOL) measures and surgical parameters. Read More

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September 2021

Circumferential fusion with open versus percutaneous posterior fusion for lumbar isthmic spondylolisthesis.

Clin Neurol Neurosurg 2021 Sep 3;209:106935. Epub 2021 Sep 3.

Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA 19107, United States.

Study Design: Retrospective cohort study.

Objective: To investigate the clinical and radiographic differences between patients who underwent anterior lumber interbody fusion (ALIF) with either open or percutaneous posterior fusion for lumbar isthmic spondylolisthesis.

Summary Of Background Data: Circumferential fusion for isthmic spondylolisthesis is commonly performed with superior clinical outcomes, fusion rates, and restoration of sagittal balance when compared to posterior fusion alone. Read More

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September 2021

Effect of artificial surface shapes and their malpositioning on the mechanics of the replaced ankle joint for possible better prosthesis designs.

Clin Biomech (Bristol, Avon) 2021 Sep 17;90:105489. Epub 2021 Sep 17.

Movement Analysis Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.

Background: The clinical outcomes of total ankle replacement are limited by prosthesis component malpositioning during surgery. The goal of this study is to assess the mechanical impact of this malpositioning in a validated computer model.

Methods: In a previously developed multi-body dynamic model of the human ankle complex three different artificial implants were designed, each one presenting a different approximation of the natural articular surfaces of the corresponding specimen. Read More

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September 2021

Association of Sagittal Spinopelvic Realignment with Correction in Lower Lumbar Lordosis after Surgical Treatment in Degenerative Lumbar Scoliosis.

Orthop Surg 2021 Sep 24. Epub 2021 Sep 24.

The Spine Surgery, The First Medical Center of the Chinese PLA General Hospital, Beijing, China.

Objective: To assess the effect that correction of lower lumbar lordosis (3L) has on global spine realignment due to the key role of 3L for scoliosis surgery in patients with degenerative lumbar scoliosis (DLS).

Methods: This study is a retrospective review performed between June 2018 and January 2020, including consecutive patients with DLS. Only patients age ≥ 45 years who had already undergone a selective root block operation and had the procedure of long-fusion extending to pelvis and posterior lumbar interbody fusion (PLIF) at lower lumbar spine (L -S ) were retained for analysis. Read More

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September 2021

Long-term surgical outcome of Chiari type-I malformation-related syringomyelia: an experience of tertiary referral hospital.

Neurol Res 2021 Sep 24:1-12. Epub 2021 Sep 24.

Department of Psychiatry - AMATEM Unit, Bakırköy Research and Training Hospital for Neurology Neurosurgery, and Psychiatry, University of Health Sciences, Istanbul, Turkey.

Objective: Syringomyelia is a common condition seen in patients with Chiari type-I malformation (CM1). The purpose of this retrospective study was to evaluate the long-term clinical and radiological outcomes of posterior fossa decompression with duraplasty (PFDD) with coagulation of tonsillar ectopia in consecutive surgically treated adult patients with CM1-related syringomyelia (CRS).

Methods: Over 9 years' duration (1993-2001), medical charts of diagnosed patient with CM1 at our neurosurgical center were reviewed retrospectively. Read More

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September 2021

Intelligent quantitative assessment of skeletal maturation based on multi-stage model: a retrospective cone-beam CT study of cervical vertebrae.

Oral Radiol 2021 Sep 23. Epub 2021 Sep 23.

Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, 136 Hanzhong Street, Gulou District, Nanjing, 210029, China.

Objective: To develop new logistic regression estimative models of the cervical vertebral maturation index (CVMI) based on cone-beam CT (CBCT)-derived parameters for intelligent evaluating skeletal maturation.

Methods: From 231 CBCT volumes (age range 7-17, mean age 11.09 years), 154 were randomly selected to produce 2D sagittal projections of the second to fourth cervical vertebrae (C2-C4). Read More

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September 2021

Laparoscopic Approach in Anorectal Malformations: How We Do It.

J Laparoendosc Adv Surg Tech A 2021 Sep 22. Epub 2021 Sep 22.

Division of Colorectal and Pelvic Reconstruction, Children's National Hospital, Washington, District of Columbia, USA.

Laparoscopy has a major role in the treatment of anorectal malformations (ARM) since Georgeson et al. introduced the laparoscopic assisted anorectoplasty in 2000. The majority of ARM can be repaired through a posterior sagittal incision without the need to enter the abdomen. Read More

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September 2021

Comparing the locking screw direction of three locking plates for lateral clavicle fractures: a simulation study.

BMC Musculoskelet Disord 2021 Sep 21;22(1):812. Epub 2021 Sep 21.

Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan.

Background: The locking plate is a useful treatment for lateral clavicle fractures, however, there are limits to the fragment size that can be fixed. The current study aimed to measure the screw angles of three locking plates for lateral clavicle fractures. In addition, to assess the number of screws that can be inserted in different fragment sizes, to elucidate the size limits for locking plate fixation. Read More

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September 2021

Emissary Foramina of the External Occipital Protuberance: A Magnetic Resonance Imaging Study.

J Comput Assist Tomogr 2021 Sep-Oct 01;45(5):753-758

From the Department of Neurological Surgery, Juntendo University Urayasu Hospital, Urayasu, Chiba.

Objective: The posterior interparietal region is known to be a distinct area of the skull, predisposing to a variety of bony variants and congenital anomalies. The bony canals in this region have not yet been explored in detail. This study aimed to characterize them. Read More

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September 2021

Correlation between the position of the glenoid fossa and condylar translational movement in skeletal Class III mandibular asymmetry patients.

Eur J Orthod 2021 Sep 21. Epub 2021 Sep 21.

Department of Maxillofacial Orthognathics, Division of Maxillofacial and Neck Reconstruction, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Japan.

Objectives: Understanding the mechanism of mandibular asymmetry (MA) is important to provide suggestions for occlusal treatment and to know the developmental process of masticatory dysfunction. To investigate the morphological and functional effects on MA, we evaluated the three-dimensional position of the glenoid fossa and its relationship to asymmetrical condylar translational movement.

Methods: In this retrospective study, 50 subjects who previously underwent computed tomography for surgical purposes were divided into MA and control groups according to a menton deviation of at least 4 mm from the mid-sagittal plane. Read More

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September 2021

Accuracy of MRI and X-Ray Measurement of Displacement Distance of Humeral Lateral Condyle Fractures.

Orthop Surg 2021 Sep 19. Epub 2021 Sep 19.

Tianjin Hospital, Tianjin, China.

Objective: To investigate the accuracy of X-ray and magnetic resonance imaging (MRI) measurements in evaluating the displacement of humeral lateral condyle fracture (HLCF) in different positions of the forearm based on human cadaveric HLCF models.

Methods: Three human cadaveric elbow HLCF fracture models were successfully established. The wrist joint was fixed, and the forearm was rotated forward along the mid-axis. Read More

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September 2021

Spine-Pelvis-Hip Alignments in Degenerative Spinal Deformity Patients and Associated Procedure of One-Stage Long-Fusion with Multiple-Level PLIF or Apical-Vertebra Three Column Osteotomy-a Clinical and Radiographic Analysis Study.

Orthop Surg 2021 Sep 19. Epub 2021 Sep 19.

The Medical College of Nankai University, Tianjin, China.

Objective: To explore the spine-pelvis-hip alignments in degenerative spinal deformity (DSD) patients, and compare the outcomes in the procedure of long-fusion with posterior lumbar inter-body fusion (PLIF) or single-level three-column osteotomy (STO) at lower lumbar level (LLL, L -S ) and thoracolumbar levels (TLL, T -L ) for those patients.

Methods: This is a retrospective study. Following institutional ethics approval, a total of 83 patients (Female, 67; Male, 16) with DSD underwent long-fusion with PLIF or STO surgery between March 2015 and December 2017 were reviewed. Read More

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September 2021

Stability prediction of early orthopedic treatment in Class III malocclusion: morphologic discriminant analysis.

Prog Orthod 2021 Sep 20;22(1):34. Epub 2021 Sep 20.

Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.

Background: To evaluate morphologic differences between class III malocclusion success and failure treatment subjects in order to identify which variables are more predictive for long-term stability in early orthopedic treatment. In this retrospective study, 31 patients were enrolled from the Department of Orthodontics (Rome Tor Vergata). Inclusion criteria were as follows: white ancestry, class III malocclusion, mixed dentition, cervical stage (CS) 1-2, no pseudo-class III. Read More

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September 2021

Effect of Time on MRI Appearance of Graft After ACL Reconstruction: A Comparison of Autologous Hamstring and Quadriceps Tendon Grafts.

Orthop J Sports Med 2021 Sep 13;9(9):23259671211023512. Epub 2021 Sep 13.

School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, Victoria, Australia.

Background: After anterior cruciate ligament (ACL) reconstruction (ACLR), changes in the appearance of the ACL graft can be monitored using magnetic resonance imaging (MRI).

Purpose: The purpose of this study was to evaluate and compare the MRI signal intensity (SI) of hamstring and quadriceps tendon grafts during the first postoperative year after ACLR. As a secondary aim, the relationship of SI to clinical and anatomic measurements was analyzed. Read More

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September 2021

The effect of orthodontic treatment on temporomandibular joint morphology in adult skeletal class II deep overbite patients.

Am J Transl Res 2021 15;13(8):9070-9075. Epub 2021 Aug 15.

Department of Stomatology, Fujian Provincial Clinical College of Fujian Medical University, Fujian Provincial Hospital Fuzhou, Fujian Province, China.

Objective: To explore the morphological changes of the temporomandibular joint (TMJ) in adult patients with skeletal class II deep overbite before and after orthodontic treatment, and to analyze the effect of the orthodontic treatment.

Methods: A total of 40 adult skeletal class II deep overbite patients were recruited as the study cohort. For each subject, the morphology and position of the TMJ were determined using cone beam computed tomography. Read More

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Emissary Foramina of the External Occipital Protuberance: A Magnetic Resonance Imaging Study.

J Comput Assist Tomogr 2021 Sep 17. Epub 2021 Sep 17.

From the Department of Neurological Surgery, Juntendo University Urayasu Hospital, Urayasu, Chiba Division of Radiological Technology, Medical Satellite Yaesu Clinic, Tokyo, Japan.

Objective: The posterior interparietal region is known to be a distinct area of the skull, predisposing to a variety of bony variants and congenital anomalies. The bony canals in this region have not yet been explored in detail. This study aimed to characterize them. Read More

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September 2021

Long-term outcome after surgical treatment of Scheuermann's Kyphosis (SK).

Spine Deform 2021 Sep 17. Epub 2021 Sep 17.

Park Hospital, Nottingham, UK.

Study Design: A retrospective observational cohort study with a minimum follow-up of 10 years of patients who underwent surgery for Scheurmann Kyphosis (SK).

Objective: Evaluate the long-term clinical and radiological outcome of patients with SK who either underwent combined anterior-posterior surgery or posterior instrumented fusion alone. There is paucity of literature for long-term outcome studies on SK. Read More

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September 2021

Risk factors for the development of DJK in AIS patients undergoing posterior spinal instrumentation and fusion.

Spine Deform 2021 Sep 16. Epub 2021 Sep 16.

Department of Orthopaedic Surgery, Columbia Universityl, New York, NY, USA.

Purpose: Typically, selection of lowest instrumented vertebra (LIV) in Adolescent Idiopathic Scoliosis (AIS) is based on the coronal radiograph; however, increasing evidence suggests that fusions proximal to the stable sagittal vertebrae (SSV) on the lateral radiograph can result in distal junctional kyphosis (DJK). The purpose of this study is to compare rates of DJK in patients with AIS that have a discordance between the Lowest Touched Vertebra (LTV) and the SSV and to identify risk factors for developing DJK.

Methods: Patients with AIS Lenke type 1, 2 and 3 curves treated with a posterior spinal fusion were separated into two groups. Read More

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September 2021

Potential of Intraoperative Ultrasonographic Assessment of Spinal Cord Central Echo Complex in Predicting Postoperative Neurological Recovery of Degenerative Cervical Myelopathy.

Eur J Neurol 2021 Sep 15. Epub 2021 Sep 15.

Guangdong Provincial Biomedical Innovation Platform of Regeneration and Repair of Spinal Cord and Nerve Injury, Department of Orthopedic Surgery, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, 518107, China.

Background: Spinal cord central echo complex (SCCEC) is a special ultrasound-based intramedullary structure, but its clinical significance in degenerative cervical myelopathy (DCM) is undefined. This study is aimed to explore the potential of SCCEC in predicting the postoperative neurological recovery of DCM.

Methods: Thirty-two DCM patients who underwent French-door laminoplasty with the guidance of intraoperative ultrasound were prospectively enrolled. Read More

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September 2021

Biomechanical assessment of two types and two different locations of subtalar arthroereisis implants for flexible flatfoot: A cadaveric study.

Clin Biomech (Bristol, Avon) 2021 Aug 30;89:105475. Epub 2021 Aug 30.

Department of Orthopedics, Huashan Hospital, Fudan University, 12 Middle Wulumuqi Road, Shanghai 200040, China. Electronic address:

Background: Subtalar arthroereisis refers to the implantation of a sinus tarsi implant for the treatment of flexible flatfoot. The purpose of this study was to compare the ability to correct the flatfoot deformity and contact pressure of the posterior subtalar joint between two types of self-locking wedge implants and between two different positions for the same device in a cadaveric flatfoot model.

Methods: The flatfoot model was created in ten cadaver feet through ligament sectioning and cyclic loading. Read More

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Refractive changes of a new asymmetric intracorneal ring segment with variable thickness and base width: A 2D finite-element model.

PLoS One 2021 15;16(9):e0257222. Epub 2021 Sep 15.

Department of Information Technology and Electrical Engineering, OPTIC Team, Computer-assisted Applications in Medicine Group, ETH Zurich, Zurich, Switzerland.

Purpose: To evaluate the local geometric effects of a unilateral intrastromal ring segment with a combined variation of ring thickness and base width in a finite element simulation, and to compare it against the isolated effect of thickness or base width variation alone.

Methods: A two-dimensional finite-element model of a transversely isotropic cornea was created assuming either axisymmetric stress or plane strain condition. The model geometry was composed of a three-layered corneal tissue (epithelium, anterior and posterior stroma) fixed at the limbus. Read More

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September 2021

Correlation Analysis for Selection of Microtitanium Plates with Different Specifications for Use in a Cervical Vertebral Dome Expansion Laminoplasty.

Orthop Surg 2021 Sep 15. Epub 2021 Sep 15.

The Second Affiliated Hospital of Shanxi Medical University, Taiyuan, China.

Objective: To analyze correlations between the selection of microtitanium plates with different specifications for use in a cervical vertebral dome expansion laminoplasty.

Methods: Sixteen patients that underwent the cervical vertebral dome expansion laminoplasty with a cervical spinal stenosis angioplasty procedure for treatment of their cervical spinal cords were recruited at our hospital. From February 2017 to September 2018, medical records confirmed that all patients underwent cervical CT and MRI tests pre- and postsurgery. Read More

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September 2021

[Effects of age and gender on posterior cranial fossa linear volume and cerebellar tonsil position in normal populations].

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2021 Sep;35(9):1167-1171

Department of Orthopedics, the Affiliated Hospital of Southwest Medical University, Luzhou Sichuan, 646000, P.R.China.

Objective: To investigate the effects of gender and age on the posterior cranial fossa linear volume and cerebellar tonsil position in normal populations.

Methods: A total of 180 normal adults who underwent cervical MRI examination at the physical examination center were selected, including 90 males and 90 females; the age ranged from 20 to 79 years, with an average of 50.4 years. Read More

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September 2021

Posterior Thoracic Cage Interbody Fusion Offers Solid Bone Fusion with Sagittal Alignment Preservation for Decompression and Fusion Surgery in Lower Thoracic and Thoracolumbar Spine.

J Korean Neurosurg Soc 2021 Sep 15. Epub 2021 Sep 15.

Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.

Objective: It is challenging to make solid fusion by posterior screw fixation and laminectomy with posterolateral fusion (PLF) in thoracic and thoracolumbar (TL) diseases. In this study, we report our experience and follow-up results with a new surgical technique entitled posterior thoracic cage interbody fusion (PTCIF) for thoracic and TL spine in comparison with conventional PLF.

Methods: After institutional review board approval, a total of 57 patients who underwent PTCIF (n=30) and conventional PLF (n=27) for decompression and fusion in thoracic and TL spine between 2004 and 2019 were analyzed. Read More

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September 2021

Intraoperative Use of Robotics With Navigation for Pedicle Screw Placement in Treatment of Pediatric High-grade Spondylolisthesis: A Preliminary Report.

J Pediatr Orthop 2021 Sep 9. Epub 2021 Sep 9.

Department of Orthopaedic Surgery, Boston Children's Hospital Harvard Medical School, Boston, MA.

Background: Accurate pedicle screw placement is critical to surgically correct pediatric high-grade spondylolisthesis (HGS). The recent advent of robotics coupled with computer-assisted navigation (RAN) may represent a novel option to improve surgical outcomes of HGS, secondary to enhanced pedicle screw placement safety. This series presents the HGS-RAN technique adopted by our site, describing its surgical outcomes and feasibility. Read More

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September 2021

Plain roentgenographic and CT scan morphometric analysis of the anterior atlantodens interval (AADI) and posterior atlantodens interval (PADI) in the Indian population.

Surg Neurol Int 2021 24;12:427. Epub 2021 Aug 24.

Department of Spine Services, Indian Spinal Injuries Centre, New Delhi, Delhi, India.

Background: The anterior atlantodental interval (AADI) and posterior atlantodental interval (PADI) on X-ray and computed tomography (CT) studies can both be used to gauge the risk and/or presence of neurological compression.

Methods: This retrospective observational study was conducted at a tertiary care center in 116 patients with head injuries additionally warranting routine cervical X-ray and CT examinations.

Results: The AADI averaged 1. Read More

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Class II subdivision: Cone beam computed tomography- CBCT Analysis.

J Clin Exp Dent 2021 Aug 1;13(8):e817-e825. Epub 2021 Aug 1.

Associate Professor of Orthodontics. University of Seville.

Background: To estimate whether there is skeletal and/or dental asymmetry in class II subdivision patients, between the Class II side and the Class I side using of cone beam computed tomography (CBCT).

Material And Methods: A sample of 30 patients, from a private clinic, retrospectively selected; with a class II subdivision diagnosis requiring treatment, who underwent wide-field CBCT that met the inclusion criteria. The data was processed with Dolphin 3D version 11. Read More

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The course of the main septum in the sphenoid sinuses - evaluation before the FESS.

Folia Med Cracov 2021 ;61(2):35-51

Department of Radiology, Jagiellonian University Medical College, Kraków, Poland.

The purpose of this study was to determine the course of the main septum (MS) in the sphenoid sinuses in the adult population. Materials and Methods: 296 patients (147 females, 149 males), who did not present any pathology in the paranasal sinuses, were included in this retrospective analysis of the computed tomography (CT) scans. Spiral CT scanner (Siemens Somatom Sensation 16) was used in order to glean the images of the paranasal sinuses, using standard procedure, in the option Siemens CARE Dose 4D, without using any contrast medium. Read More

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January 2021

Proximal tibial bone loss in the first 2 years after unicondylar knee arthroplasty: Anatomical pattern, predictors and clinical correlation.

Knee 2021 Sep 9;32:201-210. Epub 2021 Sep 9.

Total Joint Replacement Center, Yan Chai Hospital, Tsuen Wan, Hong Kong Special Administrative Region.

Background: Tibial stress fracture, anteromedial bone pain, and early subsidence could occur after unicondylar knee arthroplasty (UKA). The change in metaphyseal tibial bone density (MTBD) in the coronal and sagittal planes after UKA might be a contributing factor, but this has rarely been investigated. The aim of this study was to assess the regional and temporal change in MTBD in the coronal and sagittal planes in the first 2 years after UKA. Read More

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September 2021

Clinical outcomes of thoracolumbar burst fracture treated by trans-Kambin's triangle versus transpedicular bone grafting combined with posterior internal fixation.

World Neurosurg 2021 Sep 8. Epub 2021 Sep 8.

Department of Orthopedics, Northern Jiangsu People's Hospital, Clinical Medical College of Yangzhou University, Yangzhou. Electronic address:

Purpose: The ideal management of thoracolumbar burst fracture (TLBF) remains controversial. We conducted this study to compare the effectiveness and safety of trans-Kambin's triangle versus transpedicular bone grafting combined with posterior internal fixation (PIF) for TLBF.

Methods: 54 patients were retrospectively analyzed and divided into two groups: the observation group (PIF combined with bone grafting via Kambin's triangle, n=28) and the control group (PIF combined with bone grafting via transpedicular, n=26). Read More

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September 2021