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https://www.readbyqxmd.com/read/29153190/auricular-reconstruction-using-porous-polyethylene-implant-technique
#1
REVIEW
Scott Stephan, John Reinisch
Alloplast-based ear reconstruction has become more popular over the years because it offers many advantages compared with the traditional staged autologous costal cartilage approach. Advantages include earlier reconstruction in the setting of microtia, fewer procedures, less donor site morbidity, shorter surgeon learning curve, and improved consistency in the final aesthetic result. Although other implantable materials have been used in auricular reconstruction with variable success, porous high-density polyethylene frameworks combined with recent advances in the creation of the soft tissue coverage have significantly improved outcomes with minimal complications and long-term viability...
February 2018: Facial Plastic Surgery Clinics of North America
https://www.readbyqxmd.com/read/29152444/excellent-pathologic-response-and-atypical-clinical-course-of-high-grade-extremity-sarcoma-to-neoadjuvant-pencil-beam-scanning-proton-therapy
#2
Jill Remick, William Regine, Robert Malyapa, Vincent Ng, Melissa Vyfhuis, Tejan Diwanji, Susan Shyu, James W Snider
Neoadjuvant radiation therapy, followed by definitive surgical resection, remains the standard of care for resectable high-grade and unresectable soft tissue sarcomas. Proton therapy offers the promise of highly conformal dose distributions with improved sparing of neighboring normal tissues as compared with conformal and intensity modulated photon techniques. It is unclear whether proton therapy may offer an improved tumoral response, especially with dose escalation, in this relatively radio-insensitive tumor type...
September 15, 2017: Curēus
https://www.readbyqxmd.com/read/29148432/a-singular-value-decomposition-linear-programming-svdlp-optimization-technique-for-circular-cone-based-robotic-radiotherapy
#3
Bin Liang, Yongbao Li, Wei Ran, Bin Guo, Xuang Xu, Bo Liu, Jiafeng Li, Qiuwen Wu, Fugen Zhou
With robot-controlled linac positioning, the robotic radiotherapy system such as CyberKnife significantly increases the freedom in radiation beam placement, but also imposes more challenges on treatment plan optimization. The resampling mechanism in vendor supplied treatment planning system (MultiPlan) could not fully explore the increased beam direction search space. Besides, a sparse treatment plan (using fewer beams) is desired to improve the treatment efficiency. This study proposes a singular value decomposition linear programming (SVDLP) optimization technique for circular collimator based robotic radiotherapy...
November 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29147813/noninvasive-induction-of-angiogenesis-in-tissues-by-external-suction-sequential-optimization-for-use-in-reconstructive-surgery
#4
G Giatsidis, L Cheng, A Haddad, K Ji, J Succar, L Lancerotto, J Lujan-Hernandez, P Fiorina, H Matsumine, D P Orgill
In reconstructive surgery, tissues are routinely transferred to repair a defect caused by trauma, cancer, chronic diseases, or congenital malformations; surgical transfer intrinsically impairs metabolic supply to tissues placing a risk of ischemia-related complications such as necrosis, impaired healing, or infection. Pre-surgical induction of angiogenesis in tissues (preconditioning) can limit postsurgical ischemic complications and improve outcomes, but very few preconditioning strategies have successfully been translated to clinical practice due to the invasiveness of most proposed approaches, their suboptimal effects, and their challenging regulatory approval...
November 17, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29145970/minimally-invasive-posteromedial-percutaneous-plate-osteosynthesis-for-diaphyseal-tibial-fractures-technique-description
#5
Andre Wajnsztejn, Robinson Esteves Santos Pires, Alexandre Leme Godoy Dos Santos, Pedro Jose Labronici, Helio Jorge Alvachian Fernandes, Mario Ferretti
PURPOSE: The aim of this study was to evaluate the feasibility of performing minimally-invasive plate osteosynthesis (MIPO) in tibial fractures using two posteromedial incisions, and to measure the distance between the plate and neurovascular structures. MATERIALS AND METHODS: We performed nine dissections of specimens that were submitted to tibial MIPO with two posteromedial incisions. One locking compression plate (LCP) of 14 to 16 holes was inserted into the submuscular tunnel in a retrograde manner...
October 2017: Injury
https://www.readbyqxmd.com/read/29145966/outcome-evaluation-of-staged-treatment-for-bicondylar-tibial-plateau-fractures
#6
Vincenzo Giordano, Ney Pecegueiro do Amaral, Hilton A Koch, Rodrigo Pires E Albuquerque, Felipe Serrão de Souza, José Félix Dos Santos Neto
BACKGROUND: The universal accepted strategy for treating high-energy tibial plateau fractures remains a topic of ongoing debate. The challenge for the practicing orthopaedic trauma surgeon is to provide anatomical articular fracture reduction, with successfully managing the complex soft-tissue injury that is commonly present at patient admission. The primary aim of the actual study was to evaluate the results of a staged protocol for the treatment of high-energy bicondylar tibial plateau fractures...
October 2017: Injury
https://www.readbyqxmd.com/read/29145689/-ultra-high-field-mri-in-the-chicken-embryo-in-ovo-a-model-for-experimental-ophthalmology
#7
Ronja Klose, Felix Streckenbach, Stefan Hadlich, Thomas Stahnke, Rudolf Guthoff, Andreas Wree, Marcus Frank, Sönke Langner, Oliver Stachs, Tobias Lindner
Ultra-high-field MRI (UHF-MRI) is an outstanding technique for non-invasive and non-destructive imaging of soft tissues and can provide versatile contrasts and high resolution in the µm range. In vivo imaging of the embryonal chick eye with its filigree anatomical structures imposes these requirements. However, due to the short embryonal development cycle, chicken are a favourite animal model for embryonal research studies. Ultra-high-field MRI allows repeated and longitudinal in ovo investigations on the same embryo...
November 16, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29143901/combined-vertebral-augmentation-and-radiofrequency-ablation-in-the-management-of-spinal-metastases-an-update
#8
REVIEW
Ning Mao Kam, Julian Maingard, Hong Kuan Kok, Dinesh Ranatunga, Duncan Brooks, William C Torreggiani, Peter L Munk, Michael J Lee, Ronil V Chandra, Hamed Asadi
Spinal metastases are the most commonly encountered tumour of the spine, occurring in up to 40% of patients with cancer. Each year, approximately 5% of cancer patients will develop spinal metastases. This number is expected to increase as the life expectancy of cancer patients increases. Patients with spinal metastases experience severe and frequently debilitating pain, which often decreases their remaining quality of life. With a median survival of less than 1 year, the goals of treatment in spinal metastases are reducing pain, improving or maintaining level of function and providing mechanical stability...
November 16, 2017: Current Treatment Options in Oncology
https://www.readbyqxmd.com/read/29143062/-intracranial-cystic-lesions
#9
REVIEW
F Ahlhelm, K Shariat, S Götschi, S Ulmer
CLINICAL PROBLEM: Intracerebral cysts are common findings in imaging of the neurocranium and are not always clinically significant. The pathological spectrum of intracerebral cysts is, however, very broad and in addition to incidental findings includes developmental disorders, malformation tumors, primary and secondary neoplasms and infectious etiologies, such as cerebral abscess formation, cysticercosis or residuals after congenital cytomegalovirus infections. Intracerebral cystic defects may be caused by inflammatory central nervous system (CNS) diseases, such as multiple sclerosis as well as by mitochondriopathies, leukodystrophy, electrolyte disturbances or osmotic demyelination syndrome or brain infarctions, e...
November 15, 2017: Der Radiologe
https://www.readbyqxmd.com/read/29140567/human-adipose-derived-stromal-cell-isolation-methods-and-use-in-osteogenic-and-adipogenic-in-vivo-applications
#10
Elizabeth Brett, Ruth Tevlin, Adrian McArdle, Eun Young Seo, Charles K F Chan, Derrick C Wan, Michael T Longaker
Adipose tissue represents an abundant and easily accessible source of multipotent cells, which may serve as excellent building blocks for tissue engineering. This article presents a newly described protocol for isolating adipose-derived stromal cells (ASCs) from human lipoaspirate, compared to the standard protocol for harvesting ASCs established in 2001. Human ASC isolation is performed using two methods, and resultant cells are compared through cell yield, cell viability, cell proliferation and regenerative potential...
November 15, 2017: Current Protocols in Stem Cell Biology
https://www.readbyqxmd.com/read/29140095/a-customized-healing-abutment-for-immediate-and-delayed-implant-cases
#11
Lambert J Stumpel, Chandur Wadhwani
Anatomically contoured healing abutments have been shown to contain and protect slow-resorbing substitution grafts, resulting in bone and soft-tissue volume augmentation. Even in healed sites customized healing abutments have demonstrated favorable outcomes compared to standard healing abutments. Through two separate cases, this article describes a technique that enables simple chairside fabrication of precisely contoured customized healing abutments and exact 3-dimensional intraoral positioning. With this technique, the soft tissues upon maturation closely resemble the natural root contour, which allows for the generation of esthetic and functional implant-supported restorations...
November 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29138455/a-scale-to-measure-mri-contrast-agent-sensitivity
#12
Rohan D A Alvares, Daniel A Szulc, Hai-Ling M Cheng
Magnetic resonance imaging (MRI) provides superior resolution of anatomical features and the best soft tissue contrast, and is one of the predominant imaging modalities. With this technique, contrast agents are often used to aid discrimination by enhancing specific features. Over the years, a rich diversity of such agents has evolved and with that, so has a need to systematically sort contrast agents based on their efficiency, which directly determines sensitivity. Herein, we present a scale to rank MRI contrast agents...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137676/a-medium-invasiveness-multi-level-patient-s-specific-template-for-pedicle-screw-placement-in-the-scoliosis-surgery
#13
Farhad Azimifar, Kamran Hassani, Amir Hossein Saveh, Farhad Tabatabai Ghomsheh
BACKGROUND: Several methods including free-hand technique, fluoroscopic guidance, image-guided navigation, computer-assisted surgery system, robotic platform and patient's specific templates are being used for pedicle screw placement. These methods have screw misplacements and are not always easy to be applied. Furthermore, it is necessary to expose completely a large portions of the spine in order to access fit entirely around the vertebrae. METHODS: In this study, a multi-level patient's specific template with medium invasiveness was proposed for pedicle screw placement in the scoliosis surgery...
November 14, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29137667/selective-medial-soft-tissue-release-combined-with-tibial-reduction-osteotomy-in-total-knee-arthroplasty
#14
Qian Tang, Hua-Chen Yu, Ping Shang, Shang-Kun Tang, Hua-Zi Xu, Hai-Xiao Liu, Yu Zhang
BACKGROUND: To obtain the correct coronal alignment and balancing in flexion and extension, we established a selective medial release technique and investigated the effectiveness and safety of the technique during primary total knee arthroplasty (TKA). METHODS: Four hundred sixty-six primary TKAs with varus deformity were prospectively evaluated between June 2013 and June 2015. A knee joint position similar to Patrick's sign was used to release the medial structure...
November 14, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29137088/fixation-of-comminuted-midshaft-clavicle-fractures-with-bone-fragments-separated-by-soft-tissue-using-a-novel-double-ligature-technique-a-case-report
#15
Wei-Na Ju, Cheng-Xue Wang, Tie-Jun Wang, Bao-Chang Qi
RATIONALE: Clavicle fractures are common, and mostly occur in the midshaft. Methods for operative treatment of midshaft clavicle fractures are evolving, as they improve clinical outcomes compared with traditional conservative management. However, fixation of comminuted midshaft clavicle fractures with bone fragments separated by soft tissue remains a challenge. PATIENT CONCERNS: Here, we present a case of comminuted midshaft clavicle fracture with a bone fragment separated from the main fracture by soft tissue...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29137023/a-case-report-of-schatzker-type-vi-tibial-plateau-fracture-treated-with-double-reverse-traction-closed-reduction-combined-with-minimally-invasive-percutaneous-plate-osteosynthesis-technique-a-case-report
#16
Dian-Qing Li, De-Ye Song, Jiang-Dong Ni, Mu-Liang Ding, Jun Huang
RATIONALE: The knee joint is an important weight-bearing joint, tibial plateau fractures affect knee function and stability. High-energy intra-articular fractures involving the tibial plateau can cause management-related problems such as wound dehiscence; severe comminution leading to malalignment; and delayed complications such as varus collapse, implant failure, and arthritis of the knee joint. The treatment of severe or complex tibial plateau fractures can be quite difficult. Traditional methods of open reduction and plating require extensive exposures, which may further compromise soft tissue and devascularize bone fragments, leading to infection...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135896/vertical-skin-paddle-orientation-for-the-latissimus-dorsi-flap-in-breast-reconstruction-a-modification-to-simultaneously-correct-inferior-pole-constriction-and-improve-projection
#17
Megan Fracol, Michelle Grim, Steven Lanier, Neil A Fine
The latissimus dorsi myocutaneous flap (LDMF) is a reliable and frequently used option to bring vascularized skin and soft tissue to improve the stability and aesthetic result in breast reconstruction. Standard techniques with skin paddle inset in a horizontal or oblique fashion preferentially improve anterior projection (when inset at the mastectomy scar) or lower pole and infra-mammary fold (IMF) constriction (when inset into the IMF). Here, we describe a modification for inset of the LDMF that improves both anterior projection and lower pole/IMF constriction, while also allowing the latissimus muscle to fan out and provide complete implant coverage...
November 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29135866/importance-of-perimodiolar-electrode-position-for-psychoacoustic-discrimination-in-cochlear-implantation
#18
Angel Ramos Macias, Maria Teresa Perez Zaballos, Angel Ramos de Miguel, Javier Cervera Paz
HYPOTHESIS: Modiolar proximity of the cochlear implant electrodes and low impedance values have a positive effect on electrical pitch discrimination. BACKGROUND: The proximity of the cochlear electrode to the modiolar wall can determine changes in tissue and fluid environment. With the onset of soft-surgery techniques, the trauma caused during surgery has been reduced, minimizing fibrous growth. METHODS: Computed tomography-scan measurements of electrode-inner wall distance and psychoacoustic electrode discrimination tests were done...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29135862/management-of-sigmoid-sinus-associated-pulsatile-tinnitus-a-systematic-review-of-the-literature
#19
Alan C Wang, Avery N Nelson, Cassandra Pino, Peter F Svider, Robert S Hong, Eleanor Chan
OBJECTIVES: Although studies demonstrate 4 to 20% of patients with pulsatile tinnitus (PT) have associated sigmoid sinus anomalies, no consensus exists regarding optimal management. Our objective was to perform a systematic review exploring surgical and endovascular intervention of PT caused by sigmoid sinus anomalies. DATA SOURCES/EXTRACTION: A systematic review was performed using the Preferred Reporting Systems for Systematic Reviews and Meta-Analysis guidelines for reporting of results, with a target population encompassing patients with PT and either sigmoid sinus diverticulum or sigmoid wall dehiscence...
December 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29134236/-arthroscopic-soft-tissue-stabilization-of-posttraumatic-anterior-shoulder-instability-techniques-limitations-and-long-term-results
#20
REVIEW
B Ockert, N Biermann, W Nebelung, E Wiedemann
Arthroscopic soft tissue stabilization is a well-established and broadly accepted procedure to treat posttraumatic shoulder instability. Advantages in comparison to open stabilization procedures include improved visualization of the structural damage and a less invasive approach. Technical developments in recent years have led to further improvement of the arthroscopic technique for shoulder instability. This article presents a description of principles and new developments as it contains basic techniques including patient positioning, access portals, preparation of the glenoid bone, soft tissue handling and shuttle techniques...
November 13, 2017: Der Unfallchirurg
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