8,122 results match your criteria Back Reconstruction


Predicting ACL Reinjury from Return to Activity Assessments at 6-months Post-Surgery: A Prospective Cohort Study.

J Athl Train 2021 Jun 15. Epub 2021 Jun 15.

Department of Kinesiology. University of Virginia, Charlottesville, VA.

Context: Return to activity(RTA) assessments are commonly administered following ACL-Reconstruction(ACLR) to manage post-operative progressions back to activity. To date, there is little knowledge on the clinical utility of these assessments to predict patient outcomes such as secondary ACL injury once returned to activity.

Objective: To identify what measures of patient function at 6-months post-ACLR best predict return to activity and second ACL injury at a minimum of 2-years following ACLR. Read More

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Biportal endoscopic posterior lumbar decompression and vertebroplasty for extremely elderly patients affected by lower lumbar delayed vertebral collapse with lumbosacral radiculopathy.

J Orthop Surg Res 2021 Jun 14;16(1):380. Epub 2021 Jun 14.

Department of Orthopedic Surgery, Spine Center, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, 1, Singil-ro, Yeongdeungpo-gu, Seoul, Republic of Korea, 07441.

Background: Lower lumbar osteoporotic vertebral compression fracture in extremely elderly patients can often lead to lumbosacral radiculopathy (LSR) due to delayed vertebral collapse (DVC). Surgical intervention requires posterior instrumented lumbar fusion as well as vertebral augmentation or anterior column reconstruction depending on the cleft formation and intravertebral instability. However, it is necessary to decide on surgery in consideration of the patient's frail status, surgical invasiveness, and rehabilitation. Read More

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The importance of biomechanical assessment after Return to Play in athletes with ACL-Reconstruction.

Gait Posture 2021 Jun 8;88:240-246. Epub 2021 Jun 8.

Department of Basic Medical Sciences, Neuroscience and Sense Organs, School of Medicine, University of Bari "Aldo Moro", AOU Consorziale Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy; Orthopaedic & Trauma Unit, AOU Consorziale Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy.

Background: Barriers to successful return to previous level of activity following Anterior Cruciate Ligament Reconstruction (ACLR) are multifactorial and recent research suggests that athletic performance deficits persist after completion of the rehabilitation course in a large percentage of patients.

Research Question: Do technology-based biomechanical assessments reveal underneath differences in both recreational and competitive athletes in Return to Play after ACL-Reconstruction?

Methods: Thirty soccer athletes (26.9 ± 5. Read More

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Bone Cement Internal Auditory Canal Reconstruction to Reduce CSF Leak After Vestibular Schwannoma Retrosigmoid Approach.

Otol Neurotol 2021 Jun 11. Epub 2021 Jun 11.

Johns Hopkins University, School of Medicine Johns Hopkins School of Medicine, Department of Otolaryngology-Head and Neck Surgery Johns Hopkins School of Medicine, Department of Neurosurgery, Baltimore, MD.

Objective: To describe rates of cerebrospinal fluid (CSF) rhinorrhea after reconstruction of the IAC with calcium phosphate bone cement during retrosigmoid resections of vestibular schwannomas.

Methods: A retrospective chart review of 177 patients who underwent retrosigmoid craniotomy and opening of the internal auditory canal for resection of a vestibular schwannoma between January 2016 and September 2019 at a tertiary referral center. Patients with other cerebellopontine angle tumor histology, neurofibromatosis type II, or those undergoing revision surgeries were excluded. Read More

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An Anterior Cruciate Ligament In Vitro Rupture Model Based on Clinical Imaging[Formula: see text].

Am J Sports Med 2021 Jun 11:3635465211017145. Epub 2021 Jun 11.

Biomechanics Group, Mechanical Engineering Department, Imperial College London, London, UK.

Background: Biomechanical studies on anterior cruciate ligament (ACL) injuries and reconstructions are based on ACL transection instead of realistic injury trauma.

Purpose: To replicate an ACL injury in vitro and compare the laxity that occurs with that after an isolated ACL transection injury before and after ACL reconstruction.

Study Design: Controlled laboratory study. Read More

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Clinical evaluation of a phantom-based deep convolutional neural network for whole-body-low-dose and ultra-low-dose CT skeletal surveys.

Skeletal Radiol 2021 Jun 10. Epub 2021 Jun 10.

Department of Radiology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.

Objective: This study evaluated the clinical utility of a phantom-based convolutional neural network noise reduction framework for whole-body-low-dose CT skeletal surveys.

Materials And Methods: The CT exams of ten patients with multiple myeloma were retrospectively analyzed. Exams were acquired with routine whole-body-low-dose CT protocol and projection noise insertion was used to simulate 25% dose exams. Read More

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Three dimensional reconstruction of coronary artery stents from optical coherence tomography: experimental validation and clinical feasibility.

Sci Rep 2021 Jun 10;11(1):12252. Epub 2021 Jun 10.

Cardiovascular Biology and Biomechanics Laboratory, Cardiovascular Division, University of Nebraska Medical Center, 982265 Nebraska Medical Center, Omaha, NE, 68198, USA.

The structural morphology of coronary stents (e.g. stent expansion, lumen scaffolding, strut apposition, tissue protrusion, side branch jailing, strut fracture), and the local hemodynamic environment after stent deployment are key determinants of procedural success and subsequent clinical outcomes. Read More

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The Measurement of the Inclination Angle of the Hamate and Analysis of the Inclination Angle for the Rotation Deformity of the Little Finger in the Fixation of the Carpometacarpal Joint.

Orthop Surg 2021 Jun 10. Epub 2021 Jun 10.

Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.

Objective: Complex base fractures of the fifth metacarpal bone and dislocation of the fifth carpometacarpal joint are more prone to internal rotation deformity of the little finger sequence after fixation with a transarticular plate. In the past, we have neglected that there is actually a certain angle of external rotation in the hamate surface of transarticular fixation. This study measured the inclination angle of the hamate surface relative to the fifth metacarpal surface for clinical reference. Read More

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Progressive back-projection network for COVID-CT super-resolution.

Comput Methods Programs Biomed 2021 May 24;208:106193. Epub 2021 May 24.

College of Electrical Engineering and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China; Key Laboratory of Gansu Advanced Control for Industrial Processes, Lanzhou 730050, China; National Experimental Teaching Center of Electrical and Control Engineering, Lanzhou University of Technology, Lanzhou 730050, China. Electronic address:

Background And Objective: Recently, the COVID-19 epidemic has become more and more serious around the world, how to improve the image resolution of COVID-CT is a very important task. The network based on progressive upsampling for COVID-CT super-resolution increases the reconstruction error. This paper proposes a progressive back-projection network (PBPN) for COVID-CT super-resolution to solve this problem. Read More

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The potential for reduced radiation dose from deep learning-based CT image reconstruction: A comparison with filtered back projection and hybrid iterative reconstruction using a phantom.

Medicine (Baltimore) 2021 May;100(19):e25814

Department of Radiology, Soonchunhyang University College of Medicine, Bucheon Hospital, Bucheon.

Abstract: The purpose of this phantom study is to compare radiation dose and image quality of abdominal computed tomography (CT) scanned with different tube voltages and tube currents, reconstructed with filtered back projection (FBP), hybrid iterative reconstruction (IR) and deep learning image reconstruction (DLIR) algorithms.A total of 15 CT scans of whole body phantoms were taken with 3 different tube voltages and 5 different tube currents. The images were reconstructed with FBP, 30% and 50% hybrid IR adaptive statistical iterative reconstruction (ASIR-V), and low, medium and high strength DLIR algorithms. Read More

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[Occurrence of rod fracture and salvage methods after primary surgery of the congenital lumbosacral deformity associated with sacral agenesis].

Zhonghua Yi Xue Za Zhi 2021 Jun;101(21):1560-1565

Department of Spine Surgery, the Affiliated Nanjing Drum Tower Hospital of Nanjing University, Nanjing 210008, China.

To analyze the occurrence of rod fracture after surgery for lumbosacral deformity associated sacral agenesis and discuss the relevant salvage methods. The clinical records of 19 patients who underwent surgical treatment for lumbosacral deformity associated sacral agenesis from January 2001 to January 2018 were retrospectively reviewed, including 11 boys and 8 girls. The average age was (9. Read More

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Has the Threshold for Epiphysiodesis Versus Lengthening Changed in the Era of Magnetically Controlled Nails?

J Pediatr Orthop 2021 Jul;41(Suppl 1):S24-S32

Department of Orthopaedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE.

Introduction: Limb length discrepancy (LLD) is common in both the pediatric and adult population. Length inequalities can be due to a multitude of etiologies including congenital, developmental, and acquired causes. There has been little consensus on the morbidity of LLD and, as a result, the threshold necessary for treatment of LLD to prevent morbidity. Read More

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[A Real-time Reconstruction Method of CBCT Short Scan Based on Attenuation Compensation].

Zhongguo Yi Liao Qi Xie Za Zhi 2021 Jun;45(3):240-245

University of Science and Technology of China, Hefei, 230026.

Aiming at the problem of timeliness of CBCT reconstruction, a CBCT fast short scan reconstruction method is proposed. At the same time, the image reconstruction process in which a new attenuation compensation algorithm is applied to improve image quality. When performing FDK three-dimensional reconstruction of a single-frame acquisition image, the Parker-weighted image is calculated in real time, and a new attenuation compensation algorithm is applied in the back projection process to complete the short scan Parker-weighted reconstruction. Read More

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A preliminary evaluation study of applying a deep learning image reconstruction algorithm in low-kilovolt scanning of upper abdomen.

J Xray Sci Technol 2021 Jun 3. Epub 2021 Jun 3.

GE Company, Beijing, China.

Objective: To investigate feasibility of applying deep learning image reconstruction (DLIR) algorithm in a low-kilovolt enhanced scan of the upper abdomen.

Methods: A total of 64 patients (BMI<28) are selected for the enhanced upper abdomen scan and divided evenly into two groups. The tube voltages in Group A are 100kV in arterial phase and 80kV in venous phase, while tube voltages are 120kV during two phases in Group B. Read More

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Musculoskeletal ultrasound for 3D bone modeling: A preliminary study applied to lumbar vertebra.

J Back Musculoskelet Rehabil 2021 May 21. Epub 2021 May 21.

Chaire de Recherche en Anatomie Fonctionnelle, Université du Québec à Trois-Rivières, Trois-Rivières (QC) Canada, G8Z 4M3, Canada.

Background: There is no non-invasive in vivo method to assess intervertebral kinematics. Current kinematics models are based on in vitro bone reconstructions from computed tomography (CT)-scan imaging, fluoroscopy and MRIs, which are either expensive or deleterious for human tissues. Musculoskeletal ultrasound is an accessible, easy to use and cost-effective device that allows high-resolution, real-time imaging of bone structure. Read More

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Lateral Extra-Articular Tenodesis combined with anterior cruciate ligament reconstruction is effective in knees with additional features of lateral, hyperextension or increased rotational laxity: a matched cohort study.

Arthroscopy 2021 Jun 3. Epub 2021 Jun 3.

Brisbane Orthopaedic & Sports Medicine Centre, The Brisbane Private Hospital, Wickham Terrace, Brisbane, QLD 4000, Australia.

Purpose: To investigate the patient reported outcome measures (PROMs) and graft survival of combined anterior cruciate ligament reconstruction and lateral extra-articular tenodesis (ACLR-LET) compared with a matched cohort having ACLR alone.

Methods: Patients were retrospectively recruited from a consecutive series of primary ACLR-LET, between 1996-2015, with a minimum post-surgical time of four years. ACLR-LET were matched with isolated ACLR for age, gender and operation year. Read More

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"Migratory Kerato osteomyelitis" - A refractory lesion of the mandible: A pathologist's and surgeon's dilemma!!

J Oral Maxillofac Pathol 2021 Mar 19;25(Suppl 1):S61-S67. Epub 2021 Mar 19.

Army Dental Centre (R&R), New Delhi, India.

A 62 year old female patient presented with a chief complaint of non healing extraction socket in the lower left back teeth region. She underwent extraction of 37 at a private clinic following which an ulceroinfiltrative lesion developed at operated side. Multiple biopsies from the lesion were inconclusive. Read More

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Superior Capsule Reconstruction With a 3 mm-Thick Dermal Allograft Partially Restores Glenohumeral Stability in Massive Posterosuperior Rotator Cuff Deficiency: A Dynamic Robotic Shoulder Model.

Am J Sports Med 2021 Jun 3:3635465211013364. Epub 2021 Jun 3.

Steadman Philippon Research Institute, Vail, Colorado, USA.

Background: Superior capsule reconstruction (SCR) has been shown to improve shoulder function and reduce pain in patients with isolated irreparable supraspinatus tendon tears. However, the effects of SCR on biomechanics in a shoulder with an extensive posterosuperior rotator cuff tear pattern remain unknown.

Purpose/hypothesis: The purpose was to (1) establish a dynamic robotic shoulder model, (2) assess the influence of rotator cuff tear patterns, and (3) assess the effects of SCR on superior humeral head translation after a posterosuperior rotator cuff tear. Read More

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[Bring back a smile after oral cancer, it's possible !]

Rev Med Liege 2021 May;76(5-6):550-553

Service de Prothèse amovible, Prothèse implantaire et Occlusion, CHU Liège, Belgique.

Treatments for oral cancer can seriously impair the function and the aesthetic, and thus contribute to a significant reduction in the quality of life of affected patients. The role of prosthetic dentists in the multidisciplinary management of these patients is essential both in oral rehabilitation and in prosthetic planning and subsequent rehabilitation. Therefore, these dentists should be involved in the care pathway in order to shape and design the further oral rehabilitation prior to reconstructive surgery and ultimately make the patient smile again. Read More

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PWLS-PR: low-dose computed tomography image reconstruction using a patch-based regularization method based on the penalized weighted least squares total variation approach.

Quant Imaging Med Surg 2021 Jun;11(6):2541-2559

Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.

Background: Radiation exposure computed tomography (CT) scans and the associated risk of cancer in patients have been major clinical concerns. Existing research can achieve low-dose CT imaging by reducing the X-ray current and the number of projections per rotation of the human body. However, this method may produce excessive noise and fringe artifacts in the traditional filtered back projection (FBP)-reconstructed image. Read More

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The history of nasal reconstruction.

Authors:
David A Shaye

Curr Opin Otolaryngol Head Neck Surg 2021 Jun 1. Epub 2021 Jun 1.

Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology - Head & Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, USA Department of Otolaryngology - Head & Neck Surgery, University Teaching Hospital of Kigali, Kigali, Rwanda.

Purpose Of Review: Total nasal reconstruction is a unique plastic surgery challenge of the highest order. The history of nasal reconstruction dates back to ancient times and it remains a fundamental challenge today. This article reviews the historical context of nasal reconstruction, and highlights how the essential tenets of this art have been conserved over millennia. Read More

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Influence of Adaptive Statistical Iterative Reconstructions on CT Radiomic Features in Oncologic Patients.

Diagnostics (Basel) 2021 May 31;11(6). Epub 2021 May 31.

Radiology Unit, Department of Medical Surgical Sciences and Translational Medicine, Sapienza University of Rome, Sant'Andrea University Hospital, Via di Grottarossa, 1035-1039, 00189 Rome, Italy.

Iterative reconstructions (IR) might alter radiomic features extraction. We aim to evaluate the influence of Adaptive Statistical Iterative Reconstruction-V (ASIR-V) on CT radiomic features. Patients who underwent unenhanced abdominal CT (Revolution Evo, GE Healthcare, USA) were retrospectively enrolled. Read More

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Medicare bundles for arthroplasty : a journey back to fee for service?

Bone Joint J 2021 Jun;103-B(6 Supple A):119-125

Healthcare Outcomes Performance Company (HOPCo), Phoenix, Arizona, USA.

Aims: There is concern that aggressive target pricing in the new Bundled Payment for Care Improvement Advanced (BPCI-A) penalizes high-performing groups that had achieved low costs through prior experience in bundled payments. We hypothesize that this methodology incorporates unsustainable downward trends on Target Prices and will lead to groups opting out of BPCI Advanced in favour of a traditional fee for service.

Methods: Using the Centers for Medicare and Medicaid Services (CMS) data, we compared the Target Price factors for hospitals and physician groups that participated in both BPCI Classic and BPCI Advanced (legacy groups), with groups that only participated in BPCI Advanced (non-legacy). Read More

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Minimally invasive anteroposterior combined surgery using lateral lumbar interbody fusion without corpectomy for treatment of lumbar spinal canal stenosis associated with osteoporotic vertebral collapse.

J Neurosurg Spine 2021 May 28:1-9. Epub 2021 May 28.

1Department of Orthopaedic Surgery, Saiseikai Yokohamashi Tobu Hospital, Yokohama City.

Objective: Various reconstructive surgical procedures have been described for lumbar spinal canal stenosis (LSCS) with osteoporotic vertebral collapse (OVC); however, the optimal surgery remains controversial. In this study, the authors aimed to report the clinical and radiographic outcomes of their novel, less invasive, short-segment anteroposterior combined surgery (APCS) that utilized oblique lateral interbody fusion (OLIF) and posterior fusion without corpectomy to achieve decompression and reconstruction of anterior support in patients with LSCS-OVC.

Methods: In this retrospective study, 20 patients with LSCS-OVC (mean age 79. Read More

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Right hepatic arterial girdle around the common hepatic duct in liver donors: technical considerations for successful living donor liver transplantation.

Langenbecks Arch Surg 2021 May 28. Epub 2021 May 28.

Institute of Liver Disease and Transplantation, Dr Rela Institute and Medical Centre, Chennai, India.

Purpose: Variations in hepatic arterial anatomy can result in multiple arterial trunks in the graft liver. We describe our experience in dealing with five right lobe liver donors where in the right hepatic artery (RHA) branches were passing anterior and posterior to the common hepatic duct (CHD) forming an arterial girdle around it.

Methods: Five of 771 right lobe living donor liver transplants (January 2012 and March 2020) demonstrated the RHA girdle around the CHD. Read More

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The ultimate database to (re)set the evolutionary history of primate genital bones.

Sci Rep 2021 May 27;11(1):11245. Epub 2021 May 27.

Department of Sciences, Roma Tre University, Rome, Italy.

Scientific literature concerning genital bones in primates consists of both ancient works (dating back to the nineteenth century) and more recent revisions/meta-analyses, which, however, are not always so detailed or exhaustive. Based on a thorough analysis, several conflicting data, inaccurate references, and questionable claims have emerged. We generated a binary matrix of genital bone occurrence data, considering only data at the species level, based on (1) a rigorous literature search protocol, (2) raw data (collected exclusively from primary literature), (3) an updated taxonomy (often tracing back to the species taxonomic history) and (4) new occurrence data from scanned genitals of fresh and museum specimens (using micro-computed tomography-micro-CT). Read More

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Optimization of Ordered Subset Expectation Maximization Parameters for Image Reconstruction in Tc-99m Methoxyisobutylisonitrile Myocardial Perfusion SPECT and Comparison with Corresponding Filtered Back Projection-Reconstructed Images.

Indian J Nucl Med 2021 Jan-Mar;36(1):14-20. Epub 2021 Mar 4.

Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India.

Purpose Of The Study: To establish the most appropriate ordered subset expectation maximization (OSEM) parameters for image reconstruction in Tc-99m methoxyisobutylisonitrile (MIBI) myocardial perfusion SPECT (MPS) and comparison with corresponding filtered back projection (FBP)-reconstructed images.

Methods: A total of 99 stress-rest MPS studies (47 normal and 52 abnormal) were retrospectively analyzed using 16 different combinations of iterations and subsets. Images were reconstructed both with and without postreconstruction Butterworth filter (cutoff frequency and order for stress: 0. Read More

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Results of in situ fixation of Andersson lesion by posterior approach in 35 cases.

Musculoskelet Surg 2021 May 26. Epub 2021 May 26.

Stavya Spine Hospital and Research Institute, Nr Nagari Hospital, Mithakhali, Ellisbridge, Ahmedabad, Gujarat, 380006, India.

Study Objective: Due to the rarity of the Andersson lesion (AL), the literature is ambiguous regarding the type of surgical fixation, need for debridement and deformity correction. The purpose of this retrospective study is to evaluate the efficacy, feasibility and functional outcome of posterior fixation in AL.

Materials And Methods: This study included 35 patients having thoracolumbar AL operated for in situ fixation and fusion with minimum of 24-month follow-up. Read More

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Comprehensive ultrahigh resolution whole brain in vivo MRI dataset as a human phantom.

Sci Data 2021 05 25;8(1):138. Epub 2021 May 25.

Biomedical Magnetic Resonance, Faculty of Natural Sciences, Otto-von-Guericke University, Magdeburg, Germany.

Here, we present an extension to our previously published structural ultrahigh resolution T-weighted magnetic resonance imaging (MRI) dataset with an isotropic resolution of 250 µm, consisting of multiple additional ultrahigh resolution contrasts. Included are up to 150 µm Time-of-Flight angiography, an updated 250 µm structural T-weighted reconstruction, 330 µm quantitative susceptibility mapping, up to 450 µm structural T-weighted imaging, 700 µm T-weighted back-to-back scans, 800 µm diffusion tensor imaging, one hour continuous resting-state functional MRI with an isotropic spatial resolution of 1.8 mm as well as more than 120 other structural T-weighted volumes together with multiple corresponding proton density weighted acquisitions collected over ten years. Read More

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Defining and Describing Treatment Heterogeneity in New-Onset Idiopathic Lower Back and Extremity Pain Through Reconstruction of Longitudinal Care Sequences.

Spine J 2021 May 22. Epub 2021 May 22.

Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA. Electronic address:

Background Context: Despite established guidelines, long-term management of surgically-treated low back pain (LBP) and lower extremity pain (LEP) remains heterogeneous. Understanding care heterogeneity could inform future approaches for standardization of practices.

Purpose: To describe treatment heterogeneity in surgically-managed LBP and LEP. Read More

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