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https://www.readbyqxmd.com/read/28805958/large-orbital-defect-reconstruction-in-the-setting-of-globe-sparing-maxillectomy-the-titanium-hammock-and-layered-fibula-technique
#1
Samuel J Trosman, Timothy M Haffey, Rafael A Couto, Michael A Fritz
INTRODUCTION: The purpose of our study was to describe a novel technique for reconstruction of orbital defects after maxillectomy using a non-anatomic titanium mesh suspension of orbital contents for both support and volume correction. This construct is then articulated with a layered fibula osteocutaneous free flap that restores orbital rim, zygoma, and maxillary alveolus. We herein present our application of this technique, including refinements over time and long-term outcomes. METHODS: A retrospective review was performed on 12 patients who underwent reconstruction of Brown class III orbitopalatomaxillary defects with extensive orbital involvement (at minimum complete orbital floor and rim absent) with titanium mesh sling and a layered fibula free flap...
August 14, 2017: Microsurgery
https://www.readbyqxmd.com/read/28802536/incidence-of-glove-perforation-during-hand-surgical-procedures
#2
Kevin F Lutsky, Christopher Jones, Jack Abboudi, William Kirkpatrick, Fred Liss, Charles Leinberry, Asif Ilyas, Dennis Martin, Pedro K Beredjiklian
PURPOSE: To determine the rate of glove perforation during hand surgery. METHODS: We prospectively examined the rate of glove perforations among 10 fellowship-trained hand surgeons at our institution during a 6 week period. Gloves were tested for perforation using a water-fill technique at the conclusion of each surgical procedure. Surgeons recorded the presence of any glove perforations. RESULTS: Eleven perforations were identified in 10 gloves among 600 surgical procedures during the study period...
August 9, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28802415/augmentation-of-intramedullary-nailing-in-unstable-intertrochanteric-fractures-using-cerclage-wire-and-lag-screws-a-comparative-study
#3
Sunil Govind Kulkarni, Sushrut Sudhir Babhulkar, Sujay Milind Kulkarni, Govind Shivram Kulkarni, Madhura Sujay Kulkarni, Raviraj Patil
BACKGROUND: Unstable intertrochanteric fractures present a challenge to orthopaedic surgeons, with varied geometry of the fractures and a wide choice of implants and techniques. The patients are usually osteoporotic, with multiple co-morbidities and poor tolerance for complications and re-operations. Lateral wall reconstruction and stability of the trochanteric fragments are considered important in providing a better outcome of these difficult injuries. We present a technique of lateral wall and trochanteric reconstruction using Cerclage wires and lag screws in the greater trochanter in addition to intramedullary nailing, and the radiological and functional outcome of this technique of augmentation...
August 2017: Injury
https://www.readbyqxmd.com/read/28802096/comparison-of-cleaning-methods-for-delicate-insect-specimens-for-scanning-electron-microscopy
#4
Katharina Schneeberg, René Bauernfeind, Hans Pohl
The objective of the present study was to compare cleaning methods for delicate insect specimens for investigations with scanning electron microscopy (SEM). As typical specimens we used aquatic larvae of mosquitoes, springtails, larvae of mayflies and caterpillars because they are very fragile and large parts of their body consist of soft tissue. Additionally their cuticle is very often covered with dirt, soil particles or other materials. Cleaning with ultrasonic sound, as the most common cleaning method used for SEM, will destroy fragile insects...
August 12, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28799675/biomimetic-implants-for-pelvic-floor-repair
#5
REVIEW
Mahshid Vashaghian, Sebastianus J Zaat, Theodoor H Smit, Jan-Paul Roovers
BACKGROUND: Polypropylene implants are used for the reconstructive surgery of urogynaecological disorders like pelvic organ prolapse, but severe complications associated with their use have been reported. There is evidence that surface properties and a difference in mechanical stiffness between the implant and the host tissue contribute to these adverse events. Electrospinning is an innovative engineering alternative that provides a biomimetic microstructure for implants, resulting in a different mechano-biological performance...
August 11, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28799180/accuracy-of-octa-polar-bioelectrical-impedance-analysis-for-the-assessment-of-total-and-appendicular-body-composition-in-children-and-adolescents-with-hiv-comparison-with-dual-energy-x-ray-absorptiometry-and-air-displacement-plethysmography
#6
J A C de Castro, L R A de Lima, D A S Silva
BACKGROUND: Body composition analysis has been used to investigate fat mass (FM) and bone mineral content (BMC) in children and adolescents diagnosed with HIV. Investigating the validity of bioelectrical impedance analysis (BIA) is interesting with respect to testing useful techniques for monitoring body composition in children and adolescents in clinical practice. The present study aimed to determine the validity of body composition analysis by BIA compared to dual-energy X-ray absorptiometry (DXA) and air displacement plethysmography (ADP) in children and adolescents an HIV diagnosis...
August 10, 2017: Journal of Human Nutrition and Dietetics: the Official Journal of the British Dietetic Association
https://www.readbyqxmd.com/read/28798466/minimally-invasive-direct-restorations-a-practical-guide
#7
L Mackenzie, A Banerjee
The primary objectives of minimum intervention dentistry (MID) are to prevent or arrest active disease using non-operative management techniques. However, patients commonly present with cavitated caries lesions or failed restorations that are in need of operative intervention. Although much of clinical practice is devoted to preventing and managing the effects of caries and subsequent failure of the tooth-restoration complex, the clinical survival of restorations is often poor and becomes significantly worse as they increase in size and complexity...
August 11, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28796075/muscle-gap-approach-under-a-minimally-invasive-channel-technique-for-treating-long-segmental-lumbar-spinal-stenosis-a-retrospective-study
#8
Yang Bin, Wang De Cheng, Wang Zong Wei, Li Hui
This study aimed to compare the efficacy of muscle gap approach under a minimally invasive channel surgical technique with the traditional median approach.In the Orthopedics Department of Traditional Chinese and Western Medicine Hospital, Tongzhou District, Beijing, 68 cases of lumbar spinal canal stenosis underwent surgery using the muscle gap approach under a minimally invasive channel technique and a median approach between September 2013 and February 2016. Both approaches adopted lumbar spinal canal decompression, intervertebral disk removal, cage implantation, and pedicle screw fixation...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28792890/ultrafast-ultrasound-imaging-using-combined-transmissions-with-cross-coherence-based-reconstruction
#9
Yang Zhang, Yuexin Guo, Wei-Ning Lee
Plane-wave-based ultrafast imaging has become the prevalent technique for non-conventional ultrasound imaging. The image quality, especially in terms of the suppression of artifacts, is generally compromised by reducing the number of transmissions for a higher frame rate. We hereby propose a new ultrafast imaging framework that reduces not only the side lobe artifacts but also the axial lobe artifacts using combined transmissions with a new coherence-based factor. The results from simulations, in vitro wire phantoms, the ex vivo porcine artery, and the in vivo porcine heart show that our proposed methodology greatly reduced the axial lobe artifact by 25 ± 5 dB compared with coherent plane-wave compounding (CPWC), which was considered as the ultrafast imaging standard, and suppressed side lobe artifacts by 15 ± 5 dB compared with CPWC and coherent spherical-wave compounding (CSWC)...
August 4, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28792430/component-separation-technique-for-repair-of-massive-abdominal-wall-defects-at-a-pediatric-hospital
#10
James D Vargo, Michael T Larsen, Gregory D Pearson
BACKGROUND: Massive defects of the abdominal wall are commonly repaired with the component separation technique (CST) when insufficient tissue exists to close the defect primarily. Although the utility of CST has been documented in cases of large ventral hernias in adults, its application to congenital and acquired defects in pediatric patients has been largely unreported. This study is a retrospective case series discussing the success of CST at a large pediatric hospital. METHODS: Seven patients with massive abdominal wall defects, including ventral hernia and omphalocele, repaired with CST at a pediatric hospital were identified as candidates...
November 2016: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28791848/closed-reduction-and-percutaneous-annulated-screw-fixation-in-the-treatment-of-comminuted-proximal-humeral-fractures
#11
Zhe Yu, Lianhe Zheng, Xiaodong Yan, Xiaoxiang Li, Jian Zhao, Bao'an Ma
BACKGROUND: Displaced proximal humeral fractures remain a challenge to orthopedic surgeons. OBJECTIVES: The purpose of this study was to evaluate the functional and radiological outcomes of patients with comminuted proximal humeral fractures treated with closed reduction and percutaneous screw fixation (CRPF). MATERIAL AND METHODS: The authors retrospectively reviewed 38 cases of displaced proximal humeral fractures (2-, 3- or 4-part fractures according to the Neer classification) that were treated using the CRPF technique from May 2009 to April 2013...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28779814/pediatric-flatfoot-pearls-and-pitfalls
#12
REVIEW
Samuel E Ford, Brian P Scannell
Pediatric flatfeet are common, are usually asymptomatic, and typically improve over time as young children age. It is critical to differentiate flexible from rigid flatfeet and to assess for associated Achilles contracture with a careful history, physical examination, and initial radiographs. Although there are limited data, nonsurgical management of symptomatic flatfeet, both flexible and rigid, should be exhausted before considering surgical intervention. If patients fail conservative treatment, surgical management with joint-preserving, deformity-corrective techniques is typically used for pediatric flexible flatfeet in conjunction with deformity-specific soft tissue procedures...
September 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28779807/calcaneal-osteotomies-pearls-and-pitfalls
#13
REVIEW
Stephen Greenfield, Bruce Cohen
Adult acquired flatfoot deformity is a debilitating condition typically affecting middle-aged patients. The multiple components include hindfoot valgus, first ray elevation, medial soft tissue compromise, and forefoot abduction. As the foot becomes unbalanced, the deformity progresses with repetitive loading and time. Untreated patients often need significant reconstructions or extensive arthrodesis after arthritis and joint contractures present. Medializing calcaneal osteotomy is the workhorse operation for correction of hindfoot valgus, reliably correcting deformity with a relatively low complication risk...
September 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28777156/deep-transverse-metacarpal-ligament-reconstruction-using-suture-button-and-a1-pulley
#14
Joshua Piercey, Paul McEniery, Nicholas Green
Rupture of the deep transverse metacarpal ligament (DTML) can result in pain, impaired grip strength, and undermine functional performance of the hand. We describe the case of a patient whose right hand came into contact with a boat propeller. He sustained a complete disruption of the DTML between the second and third ray in addition to soft tissue injury and open metacarpal fractures. Although other techniques describe a reconstruction of the DTML, our technique describes an adjunctive technique that strongly augments the A1 pulley reconstruction and nullifies the requirements of palmaris longus graft...
August 3, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28772927/collagen-fibrinogen-lyophilised-scaffolds-for-soft-tissue-regeneration
#15
Jennifer Shepherd, Daniel Bax, Serena Best, Ruth Cameron
A significant body of research has considered collagen as a scaffold material for soft tissue regeneration. The main structural component of extra-cellular matrix (ECM), collagen's advantages over synthetic polymers are numerous. However, for applications where higher stiffness and stability are required, significant cross-linking may affect bioactivity. A carbodiimide (EDC) cross-linking route consumes carboxylate groups that are key to collagen's essential cell recognition motifs (GxOGER). Fibrinogen was considered as a promising additive as it plays a key role in the process of wound repair and contains RGD integrin binding sites which bind to a variety of cells, growth factors and cytokines...
May 23, 2017: Materials
https://www.readbyqxmd.com/read/28772059/optical-projection-tomography-with-a-tissue-clearing-agent-for-developmental-and-reproductive-toxicology-studies
#16
Alexander W Magsam, Michael Johnson, Thomas Villani, Mark C Pierce
BACKGROUND: Developmental and reproductive toxicology (DART) testing represents an expensive and time-consuming stage in determining the toxicological profile of new chemical entities. Within DART studies, morphological evaluation of fetal skeletons for developmental abnormalities typically requires 7 to 14 days. Current processing techniques involve digestion of soft tissue using a strong base (KOH), followed by qualitative assessment of the remaining skeletal tissue by a fetal morphologist...
August 3, 2017: Birth defects research
https://www.readbyqxmd.com/read/28771375/recent-development-and-biomedical-applications-of-self-healing-hydrogels
#17
Yinan Wang, Christian K Adokoh, Ravin Narain
Hydrogels are of special importance, owing to their high-water content and various applications in biomedical and bio-engineering research. Self-healing properties is a common phenomenon in living organisms. Their endowed property of being able to self-repair after physical/chemical/mechanical damage to fully or partially its original properties demonstrates their prospective therapeutic applications. Due to complicated preparation and selection of suitable materials, the application of many host-guest supramolecular polymeric hydrogels are so limited...
August 3, 2017: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/28770415/measurement-accuracy-of-alveolar-soft-tissue-contour-using-a-laboratory-laser-scanner
#18
Daisuke Ueno, Mariko Kobayashi, Kenko Tanaka, Tsuneaki Watanabe, Tetsuro Nakamura, Kazuhiko Ueda, Takatoshi Nagano
Steric analysis of morphological changes is important for evaluation of surgical techniques. This study was performed to assess the measurement accuracy of alveolar soft tissue contour with a laboratory laser scanner. The width of the maxillary alveolar soft tissue contour was evaluated in 20 volunteers. Measurement sites were established in the alveolar soft tissue contour of the maxillary incisor and canine areas. Each site was evaluated by direct measurement with a microcaliper for each subject (DMM) and image measurement using a laboratory laser scanner (IMS)...
August 2, 2017: Odontology
https://www.readbyqxmd.com/read/28767366/detector-blur-and-correlated-noise-modeling-for-digital-breast-tomosynthesis-reconstruction
#19
Jiabei Zheng, Jeffrey A Fessler, Heang-Ping Chan
This paper describes a new image reconstruction method for digital breast tomosynthesis (DBT). The new method incorporates detector blur into the forward model. The detector blur in DBT causes correlation in the measurement noise. By making a few approximations that are reasonable for breast imaging, we formulated a regularized quadratic optimization problem with a data-fit term that incorporates models for detector blur and correlated noise (DBCN). We derived a computationally efficient separable quadratic surrogate (SQS) algorithm to solve the optimization problem that has a non-diagonal noise covariance matrix...
July 27, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28766885/technical-note-construction-of-heterogeneous-head-phantom-for-quality-control-in-stereotactic-radiosurgery
#20
Mohsen Najafi, Javad Teimouri, Alireza Shirazi, Ghazaleh Geraily, Mahbod Esfahani, Mostafa Shafaei
PURPOSE: Stereotactic radiosurgery is a high precision modality for conformally delivering high doses of radiation to the brain lesion with a large dose volume. Several studies for the quality control of this technique were performed to measure the dose delivered to the target with a homogenous head phantom and some dosimeters. Some studies were also performed with one or two instances of heterogeneity in the head phantom to measure the dose delivered to the target. But these studies assumed the head as a sphere and simple shape heterogeneity...
August 2, 2017: Medical Physics
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