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https://www.readbyqxmd.com/read/28430991/development-toward-high-resolution-x-ray-phase-imaging
#1
Atsushi Momose
Since the 1990s, the use of X-ray phase contrast has been extensively studied for imaging weakly absorbing objects consisting of low-Z elements such as biological soft tissues and polymers. The development of X-ray microscopy was also progressing during this time, although absorption contrast was only available. It was straightforward and important to develop phase-contrast X-ray microscopy. One characteristic in the development is that quantitative phase measurement is possible through the acquisition of phase-contrast images under a specific procedure, thanks to digital X-ray image detectors...
April 18, 2017: Microscopy
https://www.readbyqxmd.com/read/28429477/the-emerging-role-of-maxillofacial-radiology-in-the-diagnosis-and-management-of-patients-with-complex-periodontitis
#2
REVIEW
William C Scarfe, Bruno Azevedo, Lucas R Pinheiro, Menik Priaminiarti, Marcelo A O Sales
Contemporary periodontal therapy has evolved to become more interdisciplinary and increasingly involves more complex treatments, including bone and soft-tissue regenerative procedures. Therapeutic options require an imaging modality or combination of techniques that are capable of providing a diagnostic osseous baseline and facilitating quantification of smaller increments of bony change, both loss and additive, which are comparable over time. Intra-oral and panoramic radiography are the modalities most commonly used to identify the location, quantify the amount and the pattern of alveolar bone loss and determine response to therapy...
June 2017: Periodontology 2000
https://www.readbyqxmd.com/read/28429472/transoral-orthodromic-temporalis-muscle-transfer-technique-for-the-paralysed-midface-our-learning-curve-experience-from-the-first-10-cases
#3
Lepa Lazarova, Tristram H Lesser, Samuel C Leong
Sir Harold Gillies first described rotating a band of temporalis muscle over the zygoma where the muscle sling was augmented with strips of fascia lata to rehabilitate facial paralysis (1) . McLaughlin later modified this technique in the 1950s without inversion of the temporal muscle but in an orthodromic manner thus avoiding the soft tissue fullness over the zygomatic arch area and depression of the donor site (2) . Although several refinements of this technique have been described, all required skin incisions on the face until a transoral technique was described recently by this clinical group (3) ...
April 21, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28429394/immediate-implant-placement-and-restoration-in-the-anterior-maxilla-tissue-dimensional-changes-after-2-5-year-follow-up
#4
Himanshu Arora, Nabil Khzam, David Roberts, William L Bruce, Saso Ivanovski
BACKGROUND: Immediate implant placement followed by an immediate restoration has proven to be a viable technique in the anterior maxillary region. PURPOSE: This prospective study evaluated the mid-long term (2-5 years) tissue changes around immediately placed and restored implants in the anterior maxilla using flapless surgery and simultaneous hard tissue augmentation. MATERIALS AND METHODS: Thirty AstraTech implants were immediately placed in 30 patients, followed by the delivery of an immediate provisional restoration on the same day...
April 21, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28429040/retraction-force-necessary-to-expose-the-mandibular-neck-in-risdon-and-high-cervical-anteroparotid-transmasseteric-approaches-an-anatomic-comparative-study
#5
Jérôme Adnot, Aliosha Feuss, Fabrice Duparc, Olivier Trost
PURPOSE: The purpose of this anatomic study was to compare the retraction force necessary to expose the mandibular neck in the Risdon and the high cervical anteroparotid transmasseteric (HAT) approaches. METHODS: An anatomic study was performed on 18 formalin-embalmed cadavers. We performed a Risdon approach on the left side, and an HAT approach on the right side in all the cases. The subjects were placed in a normative frame and the force necessary to maintain a satisfactory exposure of the condyle was measured with a system of cables, pulleys, and mechanical dynamometer...
April 20, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28428920/surgical-strategy-and-techniques-for-low-profile-dorsal-plating-in-treating-dorsally-displaced-unstable-distal-radius-fractures
#6
Yoshitaka Hamada, Hiroyuki Gotani, Naohito Hibino, Yoshitaka Tanaka, Ryousuke Satoh, Kousuke Sasaki, Thepparat Kanchanathepsak
Background The low-profile dorsal locking plating (DLP) technique is useful for treating dorsally comminuted intra-articular distal radius fractures; however, due to the complications associated with DLP, the technique is not widely used. Methods A retrospective review of 24 consecutive cases treated with DLP were done. Results All cases were classified into two types by surgical strategy according to the fracture pattern. In type 1, there is a volar fracture line distal to the watershed line in the dorsally displaced fragment, and this type is treated by H-framed DLP...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28423440/-results-after-distal-digital-replantation-is-it-worth-the-effort
#7
David Braig, Jan R Thiele, Vincenzo Penna, G Björn Stark, Steffen U Eisenhardt
There are only relative indications for distal digital replantation in zones 1 and 2 according to Tamai. In contrast to primary closure for fingertip amputations, replantation is a complex procedure that requires skills in supermicrosurgical techniques, as vessels with diameters between 0.3-0.8 mm are connected. In addition the time spent in hospital and the time off from work are longer. Distal digital replantation is thus only indicated, if the expected functional and aesthetic benefits surmount those of primary closure...
February 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28423221/facial-asymmetry-in-head-and-neck-rhabdomyosarcoma-survivors
#8
Reineke A Schoot, Marinka L F Hol, Johannes H M Merks, Michael Suttie, Olga Slater, Marinde van Lennep, Saskia M J Hopman, David Dunaway, Jonathan Syme-Grant, Ludi E Smeele, Koos H Zwinderman, Huib N Caron, Peter Hammond
INTRODUCTION: Radiotherapy is essential for achieving and maintaining local control in head and neck rhabdomyosarcoma (HNRMS) patients. However, radiotherapy may cause outgrowth disturbances of facial bone and soft tissue, resulting in facial asymmetry. The aim of this study was to develop a method to visualize and measure facial asymmetry in HNRMS survivors using three-dimensional (3D) imaging techniques. METHODS: Facial deformity was evaluated in a multidisciplinary clinical assessment of 75 HNRMS survivors, treated with external beam radiotherapy (EBRT, n = 26) or Ablative surgery, MOulage brachytherapy, and REconstruction (AMORE, n = 49)...
April 19, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28419685/scaffolds-for-epithelial-tissue-engineering-customized-in-elastomeric-molds
#9
Mohamed-Nur Abdallah, Sara Abdollahi, Marco Laurenti, Dongdong Fang, Simon D Tran, Marta Cerruti, Faleh Tamimi
Restoration of soft tissue defects remains a challenge for surgical reconstruction. In this study, we introduce a new approach to fabricate poly(d,l-lactic acid) (PDLLA) scaffolds with anatomical shapes customized to regenerate three-dimensional soft tissue defects. Highly concentrated polymer/salt mixtures were molded in flexible polyether molds. Microcomputed tomography showed that with this approach it was possible to produce scaffolds with clinically acceptable volume ratio maintenance (>90%). Moreover, this technique allowed us to customize the average pore size and pore interconnectivity of the scaffolds by using variations of salt particle size...
April 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28418783/locoregional-flaps-for-oral-cavity-reconstruction-a-review-of-modern-options
#10
Urjeet A Patel, Gregory K Hartig, Matthew M Hanasono, Derrick T Lin, Jeremy D Richmon
Objective To review state-of-the-art modifications and advances in soft tissue local and regional flap reconstruction of the oral cavity and to determine the role these techniques play in current practice. Data Sources Review of the literature regarding oral cavity reconstruction. Review Methods The authors describe advances in locoregional reconstructive options and assimilate data from the literature that compare recent advances to the historic standards. Conclusions Modern advances in regional reconstruction of the oral cavity offer outstanding results and demonstrate potential advance over free tissue transfer...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28418454/an-indirect-indentation-method-for-evaluating-the-linear-viscoelastic-properties-of-the-brain-tissue
#11
Aref Samadi-Dooki, George Z Voyiadjis, Rhett W Stout
Indentation experiments offer a robust, fast, and repeatable testing method for evaluating the mechanical properties of solid state materials in a wide stiffness range. With the advantage of requiring a minimal sample preparation and multiple tests on a small piece of specimen, this method has recently become a popular technique for measuring the elastic properties of the biological materials, especially the brain tissue whose ultra-soft nature makes its mechanical characterization very challenging. Nevertheless, some limitations are associated with the indentation of the brain tissue, such as improper surface detection, negative initial contact force due to tip-tissue moisture interaction, partial contact between the tip and the sample, etc...
April 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28417857/nuclear-medicine-imaging-in-pediatric-infection-or-chronic-inflammatory-diseases
#12
REVIEW
Alberto Signore, Andor W J M Glaudemans, Olivier Gheysens, Chiara Lauri, Onofrio A Catalano
In this review article, we focus on the most recent applications of nuclear medicine techniques (mainly (99m)Tc/(111)In white blood cells (WBC) scan, [(18)F]-FDG-PET/CT, [(18)F]-FDG-PET/MRI, and (99m)Tc-IL-2 scintigraphy) in the study of children affected by peripheral bone osteomyelitis, fungal infections, inflammatory bowel diseases, and type 1 diabetes, owing to recent important published evidences of their role in the management of these diseases. For osteomyelitis in children, both bone scintigraphy and [(18)F]-FDG-PET have a major advantage of assessing the whole body in one imaging session to confirm or exclude multifocal involvement, whereas WBC scan has a limited role...
May 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28417536/stretchable-and-soft-electronics-using-liquid-metals
#13
REVIEW
Michael D Dickey
The use of liquid metals based on gallium for soft and stretchable electronics is discussed. This emerging class of electronics is motivated, in part, by the new opportunities that arise from devices that have mechanical properties similar to those encountered in the human experience, such as skin, tissue, textiles, and clothing. These types of electronics (e.g., wearable or implantable electronics, sensors for soft robotics, e-skin) must operate during deformation. Liquid metals are compelling materials for these applications because, in principle, they are infinitely deformable while retaining metallic conductivity...
April 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28417258/in-vivo-facial-soft-tissue-depths-of-a-modern-adult-population-from-germany
#14
Nicolle Thiemann, Volker Keil, Uwe Roy
Forensic facial reconstruction may be the final option available to draw public attention in cases where the identity of an individual cannot be established by standard identification methods. Two fundamental components of all forensic facial reconstruction techniques are cranial morphology and soft tissue depth databases. The purpose of this study was to extend such databases by providing a complete set of accurate facial soft tissue thickness measurements, acquired from a contemporary adult population from Germany...
April 17, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28416832/-minimally-invasive-plate-osteosynthesis-for-treatment-of-proximal-humeral-fractures-through-anterolateral-acromial-approach
#15
Q Zhang, N Sun, Q Huang, S W Zhu
OBJECTIVE: To investigate the feasibility, surgical technique and effect of osteosynthesis for proximal humerus fractures through the minimal incision anterolateral acromion. METHODS: In this study, 32 patients of proximal humeral fractures were selected and treated through the minimal incision antero-lateral acromion between January 2012 and October 2014. Of these patients, there were 19 males and 13 females, with mean age 46 years old (range: 22-78 years). The mechanism of injury was a trauma of simple fall for 21 patients and motor vehicle accident for 11 patients...
April 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28415497/modeling-and-optimization-of-gelatin-chitosan-micro-carriers-preparation-for-soft-tissue-engineering-using-response-surface-methodology
#16
Payam Radaei, Shohreh Mashayekhan, Saeid Vakilian
Electrospray ionization is a wide spread technique for producing polymeric microcarriers (MCs) by applying electrostatic force and ionic cross-linker, simultaneously. In this study, fabrication process of gelatin-chitosan MCs and its optimization using the Response Surface Methodology (RSM) is reported. Gelatin/chitosan (G/C) blend ratio, applied voltage and feeding flow rate, their individual and interaction effects on the diameter and mechanical strength of the MCs were investigated. The obtained models for diameter and mechanical strength of MCs have a quadratic relationship with G/C blend ratio, applied voltage and feeding flow rate...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415475/novel-non-cytotoxic-bioactive-and-biodegradable-hybrid-materials-based-on-polyurethanes-tio2-for-biomedical-applications
#17
Dulce M González-García, L Téllez Jurado, R Jiménez-Gallegos, Luis M Rodríguez-Lorenzo
Titanium compounds have demonstrated great interfacial properties with biological tissues whereas a wide variety of polyurethanes have also been successfully probed in medical applications. However, studies about hybrids based on polyurethanes/TiO2 for medical applications are scarce. The aim of this work is to design novel biodegradable hybrid materials based on polyurethanes/TiO2 (80% organic-20% inorganic) and to perform a preliminary study of the potential applications in bone regeneration. The hybrids have been prepared by a sol-gel reaction using titanium isopropoxide as precursor of the inorganic component and polyurethane as the organic one...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28413903/digital-revascularization-and-replantation-using-the-wide-awake-hand-surgery-technique
#18
Jkf Wong, C H Lin, N J Chang, H C Chen, Y T Lin, C C Hsu
The use of local anaesthesia and adrenaline for hand surgery is gaining popularity; however, where vascularity is impaired, wide-awake surgery is considered a contraindication. We present our case series of five digital devascularizations and eight amputations that underwent surgery using the 'wide-awake' anaesthetic technique. A temporary digital tourniquet (< 20 min) was used in three cases to identify structures quickly. The anastomoses were performed under local anaesthesia without a tourniquet. All cases had successful re-establishment of blood flow with good perfusion to the digital tips; no cases were re-explored because of vascular crisis...
April 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28413772/postoperative-complications-with-cryotherapy-in-bone-tumors
#19
REVIEW
Clark Chen, John Garlich, Katie Vincent, Earl Brien
The technique of cryosurgery has been used to control local recurrence in a variety of benign and malignant bone tumors. Early studies revealed significant complication rates (25%) that included fracture, infection, and soft tissue injury. Our method of cryosurgery has yielded excellent tumor control with improved complication rates. The objective of this study is to determine the characteristics of postoperative complications after pouring liquid nitrogen into curettaged bone defects, and to review our current indications and surgical technique in bone tumor management...
June 2017: Journal of Bone Oncology
https://www.readbyqxmd.com/read/28413736/targeted-intraspinal-radiofrequency-ablation-for-lumbar-spinal-stenosis
#20
Robert E Jacobson, Michelle Granville, Jesse Hatgis DO
INTRODUCTION: By using a combination of magnetic resonance imaging (MRI) and computed tomography (CT) of the lumbar spine, it is possible to distinguish between spinal stenosis caused by bone compression and specific soft tissue epidural intraspinal lesions that cause localized spinal canal stenosis and neural compression. Examples include facet cysts and yellow ligament hypertrophy. Many of these patients are elderly with medical comorbidities that make open surgery problematic. MATERIALS & METHODS: This is a study of patients with predominantly soft tissue stenosis being treated with targeted intraspinal radiofrequency (RF) heat ablation...
March 10, 2017: Curēus
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