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https://www.readbyqxmd.com/read/28213096/ectopic-tissue-engineered-ligament-with-silk-collagen-scaffold-for-acl-regeneration-a-preliminary-study
#1
Jisheng Ran, Yejun Hu, Huihui Le, Yangwu Chen, Zefeng Zheng, Xiao Chen, Zi Yin, Ruijian Yan, Zhangchu Jin, Chenqi Tang, Jiayun Huang, Yanjia Gu, Langhai Xu, Shengjun Qian, Wei Zhang, Boon Chin Heng, Pioletti Dominique, Weishan Chen, Lidong Wu, Weiliang Shen, Hongwei Ouyang
: Anterior cruciate ligament (ACL) reconstruction remains a formidable clinical challenge because of the lack of vascularization and adequate cell numbers in the joint cavity. In this study, we developed a novel strategy to mimic the early stage of repair in vivo, which recapitulated extra-articular inflammatory response to facilitate the early ingrowth of blood vessels and cells. A vascularized ectopic tissue engineered ligament (ETEL) with silk collagen scaffold was developed and then transferred to reconstruct the ACL in rabbits without interruption of perfusion...
February 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28209272/midterm-clinical-and-radiographic-results-of-mobile-bearing-revision-total-knee-arthroplasty
#2
Raymond H Kim, J Ryan Martin, Douglas A Dennis, Charlie C Yang, Jason M Jennings, Gwo-Chin Lee
BACKGROUND: Constrained implants are frequently required in revision total knee arthroplasty (TKA) and are associated with an increase in aseptic component loosening and damage or wear to the constraining mechanisms, compared with primary TKA. The purpose of the following study was to evaluate the midterm clinical and radiographic results including the incidence of bearing complications in a group of patients undergoing revision TKA using mobile-bearing revision TKA implants. METHODS: We retrospectively reviewed 316 consecutive mobile-bearing revision TKAs performed at 2 centers between 2006 and 2010...
January 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28195619/efficacy-of-the-intravitreal-sustained-release-dexamethasone-implant-for-diabetic-macular-edema-refractory-to-anti-vascular-endothelial-growth-factor-therapy-meta-analysis-and-clinical-implications
#3
Zainab Khan, Robin K Kuriakose, Maryam Khan, Eric K Chin, David R P Almeida
BACKGROUND AND OBJECTIVE: To assess the effect on best-corrected visual acuity (BCVA) and efficacy of the intravitreal sustained-release 0.7 mg dexamethasone implant (Ozurdex; Allergan, Irvine, CA) in patients with recalcitrant diabetic macular edema (DME). PATIENTS AND METHODS: Meta-analysis utilizing the MOOSE framework and a random effects model. Studies included adults undergoing treatment with Ozurdex for DME. The methodologic quality of each study was assessed using the MINORS and the Cochrane Collaboration Risk of Bias for randomized studies...
February 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28170185/magnetic-nanoparticle-based-upregulation-of-b-cell-lymphoma-2-enhances-bone-regeneration
#4
Elizabeth Brett, Elizabeth R Zielins, Anna Luan, Chin Chun Ooi, Siny Shailendra, David Atashroo, Siddarth Menon, Charles Blackshear, John Flacco, Natalina Quarto, Shan X Wang, Michael T Longaker, Derrick C Wan
Clinical translation of cell-based strategies for tissue regeneration remains challenging because survival of implanted cells within hostile, hypoxic wound environments is uncertain. Overexpression of B-cell lymphoma 2 (Bcl-2) has been shown to inhibit apoptosis in implanted cells. The present study describes an "off the shelf" prefabricated scaffold integrated with magnetic nanoparticles (MNPs) used to upregulate Bcl-2 expression in implanted adipose-derived stromal cells for bone regeneration. Iron oxide cores were sequentially coated with branched polyethyleneimine, minicircle plasmid encoding green fluorescent protein and Bcl-2, and poly-β-amino ester...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28169834/development-of-biomimetic-micro-patterned-device-incorporated-with-neurotrophic-gradient-and-supportive-schwann-cells-for-the-applications-in-neural-tissue-engineering
#5
Chia-Wei Yeh, Li-Wen Wang, Hsi-Chin Wu, Yi-Kong Hsieh, Jane Wang, Ming-Hong Chen, Tzu-Wei Wang
In these years, the artificial nerve guidance conduit has been developed as an alternative way to repair peripheral nerve injury. Unlike autologous nerve graft, the artificial nerve guidance conduit without proper stimulating factors and guidance cues still cannot obtain satisfactory prognosis for clinical patients. In this study, a biodegradable polymer-based implantable device has been developed and characterized. By incorporating three stimulating factors: 1) micro-patterned surface that can directionally guide the axon as physical cue; 2) neurotrophic gradient membrane that can continually attract axon outgrowth from the proximal to distal stump as chemical cue; 3) Schwann cells that can support the growth of neurite and form myelin sheath around axon as biological cue, we expect that this construct can be used as a promising nerve guidance conduit for peripheral nerve regeneration...
February 7, 2017: Biofabrication
https://www.readbyqxmd.com/read/28162644/-398-fully-implantable-wireless-technology-for-optogenetic-control-of-bladder-sensory-neurons
#6
K Meacham, A Mickle, S Park, Y Hsieh, J Yoon, G Chin, J Rogers, R Gereau
No abstract text is available yet for this article.
April 2016: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28113304/a-deep-denoising-autoencoder-approach-to-improving-the-intelligibility-of-vocoded-speech-in-cochlear-implant-simulation
#7
Ying-Hui Lai, Fei Chen, Syu-Siang Wang, Xugang Lu, Yu Tsao, Chin-Hui Lee
OBJECTIVE: In a cochlear implant (CI) speech processor, noise reduction (NR) is a critical component for enabling CI users to attain improved speech perception under noisy conditions. Identifying an effective NR approach has long been a key topic in CI research. METHOD: Recently, a deep denoising autoencoder (DDAE) based NR approach was proposed and shown to be effec-tive in restoring clean speech from noisy observations. It was also shown that DDAE could provide better performance than several existing NR methods in standardized objective evaluations...
September 27, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28111124/do-stem-taper-microgrooves-influence-taper-corrosion-in-total-hip-arthroplasty-a-matched-cohort-retrieval-study
#8
Christina M Arnholt, Daniel W MacDonald, Richard J Underwood, Eric P Guyer, Clare M Rimnac, Steven M Kurtz, Michael A Mont, Gregg R Klein, Gwo-Chin Lee, Antonia F Chen, Brian R Hamlin, Harold E Cates, Arthur L Malkani, Matthew J Kraay
BACKGROUND: Previous studies identified imprinting of the stem morphology onto the interior head bore, leading researchers to hypothesize an influence of taper topography on mechanically assisted crevice corrosion. The purpose of this study was to analyze whether microgrooved stem tapers result in greater fretting corrosion damage than smooth stem tapers. METHODS: A matched cohort of 120 retrieved head-stem pairs from metal-on-polyethylene bearings was created controlling for implantation time, flexural rigidity, apparent length of engagement, and head size...
November 17, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28101662/strategies-to-prevent-cast-formation-in-patients-with-plastic-bronchitis-undergoing-heart-transplantation
#9
John J Parent, Robert K Darragh, Jeffrey G Gossett, Thomas D Ryan, Chet R Villa, Angela Lorts, John L Jefferies, Jeffrey A Towbin, Clifford Chin
Plastic bronchitis, a rare complication after Fontan palliation, carries a high morbidity and mortality risk. Heart transplantation is an effective treatment option, but casts may occur in the early post-operative period. We present a case series detailing peri-operative management strategies to minimize morbidity and mortality related to plastic bronchitis in patients undergoing heart transplantation. Patient 1 received no treatment pre-, intra-, or post-transplant for prevention of bronchial casts and developed severe respiratory acidosis 18 h following transplant...
January 19, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28095522/correlation-between-resonance-frequency-analysis-and-bone-quality-assessments-at-dental-implant-recipient-sites
#10
Min-Wen Fu, Earl Fu, Fu-Gong Lin, Wei-Jeng Chang, Yao-Dung Hsieh, E-Chin Shen
PURPOSE: To evaluate whether primary implant stability could be used to predict bone quality, the association between the implant stability quotient (ISQ) value and the bone type at the implant site was evaluated. MATERIALS AND METHODS: Ninety-five implant sites in 50 patients were included. Bone type (categorized by Lekholm and Zarb) at the implant site was initially assessed using presurgical dental radiography. During the preparation of the implant site, a bone core specimen was carefully obtained...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28093363/alignment-of-collagen-fiber-in-knitted-silk-scaffold-for-functional-massive-rotator-cuff-repair
#11
Zefeng Zheng, Jisheng Ran, Weishan Chen, Yejun Hu, Ting Zhu, Xiao Chen, Zi Yin, Boon Chin Heng, Gang Feng, Huihui Le, Chenqi Tang, Jiayun Huang, Yangwu Chen, Yiting Zhou, Pioletti Dominique, Weiliang Shen, Hong-Wei Ouyang
: Rotator cuff tear is one of the most common types of shoulder injuries, often resulting in pain and physical debilitation. Allogeneic tendon-derived decellularized matrices do not have appropriate pore size and porosity to facilitate cell infiltration, while commercially-available synthetic scaffolds are often inadequate at inducing tenogenic differentiation. The aim of this study is to develop an advanced 3D aligned collagen/silk scaffold (ACS) and investigate its efficacy in a rabbit massive rotator cuff tear model...
January 13, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28071739/sox10-adult-stem-cells-contribute-to-biomaterial-encapsulation-and-microvascularization
#12
Dong Wang, Aijun Wang, Fan Wu, Xuefeng Qiu, Ye Li, Julia Chu, Wen-Chin Huang, Kang Xu, Xiaohua Gong, Song Li
Implanted biomaterials and biomedical devices generally induce foreign body reaction and end up with encapsulation by a dense avascular fibrous layer enriched in extracellular matrix. Fibroblasts/myofibroblasts are thought to be the major cell type involved in encapsulation, but it is unclear whether and how stem cells contribute to this process. Here we show, for the first time, that Sox10(+) adult stem cells contribute to both encapsulation and microvessel formation. Sox10(+) adult stem cells were found sparsely in the stroma of subcutaneous loose connective tissues...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28066608/transcatheter-aortic-valve-implantation-tavi-versus-sutureless-aortic-valve-replacement-suavr-for-aortic-stenosis-a-systematic-review-and-meta-analysis-of-matched-studies
#13
Nelson Wang, Yi-Chin Tsai, Natasha Niles, Vakhtang Tchantchaleishvili, Marco Di Eusanio, Tristan D Yan, Kevin Phan
BACKGROUND: With improving technologies and an increasingly elderly populations, there have been an increasing number of therapeutic options available for patients requiring aortic valve replacement. Recent evidence suggests that transcatheter aortic valve implantation (TAVI) is one suitable option for high risk inoperable patients, as well as high risk operable patients. Sutureless valve technology has also been developed concurrently, with facilitates surgical aortic valve replacement (SUAVR) by allow resection and replacement of the native aortic valve with minimal sutures and prosthesis anchoring required...
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28052754/the-burden-of-major-adverse-cardiac-events-in-patients-with-coronary-artery-disease
#14
I-Ting Tsai, Chao-Ping Wang, Yung-Chuan Lu, Wei-Chin Hung, Cheng-Ching Wu, Li-Fen Lu, Fu-Mei Chung, Chia-Chang Hsu, Yau-Jiunn Lee, Teng-Hung Yu
BACKGROUND: Patients with a history of cardiovascular disease are at high risk of developing secondary major adverse cardiac events (MACE). This study aimed to identify independent predictors of MACE after hospital admission which could be used to identify of high-risk patients who may benefit from preventive strategies. METHODS: This study included 1,520 consecutive patients with coronary artery disease (CAD) (654 with acute coronary syndrome (ACS) and 866 with elective percutaneous coronary intervention (PCI) patients) who received PCI and/or stenting...
January 4, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28048965/the-developing-stability-of-posterior-mandibular-implants-associated-with-bone-expansion-and-conventional-drilling-techniques
#15
Yen Ting Lin, Adrienne Hong, Ying Chin Peng, Hsiang Hsi Hong
Clinical decisions regarding the stability and osseointegration of mandibular implants positioned using the bone expansion techniques are conflicting and limited. The objective was to evaluate the stability of implants placed using two surgical techniques, selected according to the initial width of the mandibular posterior edentulous ridge, with D3 bone density, during a 12-week period. Fifty-eight implants in 33 patients were evaluated. Thirty-two implants in 24 patients were positioned using the osteotome expansion technique, and twenty-six fixtures in 17 patients were installed using the conventional drilling technique...
January 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28048346/su-f-t-660-evaluating-the-benefit-of-using-dual-function-fiducial-markers-for-in-situ-delivery-of-radiosenistizing-gold-nanoparticles-during-image-guided-radiotherapy
#16
S AlMansour, J Chin, E Sajo, W Ngwa
PURPOSE: Dual-function fiducials loaded with radiosensitizers, like gold nanoparticles (GNP), offer an innovative approach for ensuring geometric accuracy during image-guided radiotherapy (IGRT) and significantly increasing therapeutic efficacy due to controlled in-situ release of the radiosensitizers. This study retrospectively investigates the dosimetric benefit of using up to two such dual-function fiducial markers instead of traditional single function fiducials during IGRT. METHODS: A computational code was developed to investigate the dosimetric benefit for 10 real patient tumor volumes of up to 6...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28035307/long-standing-chin-augmenting-costochondral-graft-creating-a-diagnostic-challenge-a-case-report-and-literature-review
#17
Fatma Fayez Badr, Mark Mintline, Axel Ruprecht, Donald Cohen, Barton R Blumberg, Madhu K Nair
To our knowledge, the imaging features of costochondral grafts (CCGs) on cone-beam computed tomography (CBCT) have not been documented in the literature. We present the case of a CCG in the facial soft tissue to the anterior mandible, with changes mimicking a cartilaginous neoplasm. This is the first report to describe the CBCT imaging features of a long-standing graft in the anterior mandible. Implants or grafts may be incidental findings on radiographic images made for unrelated purposes. Although most are well-defined and radiographically homogeneous, being of relatively inert non-biological material, immune reactions to some grafts may stimulate alterations in the appearance of surrounding tissues...
December 2016: Imaging Science in Dentistry
https://www.readbyqxmd.com/read/28025435/a-prospective-study-of-factors-associated-with-orthodontic-mini-implant-survival
#18
Chia-Chun Tsai, Hong-Po Chang, Chin-Yun Pan, Szu-Ting Chou, Yu-Chuan Tseng
The orthodontic mini-implant (MI) is a widely used anchorage device in orthodontic treatment. This prospective study analyzed MI survival and factors associated with MI survival in 139 patients (114 females and 25 males; average age, 25.7 years; age range, 12-56 years) who had received orthodontic treatment with MIs. Survival analysis and Kaplan-Meier curves were used to identify clinical variables associated with MI survival. For the 254 MIs investigated, the overall success rate was 85.8%, and the 1-year cumulative survival rate was 81...
2016: Journal of Oral Science
https://www.readbyqxmd.com/read/28024775/bone-resorption-under-chin-implants-the-orthodontist-s-role-in-its-diagnosis-and-management
#19
Mario Polo
Alloplastic chin implants have been a valuable treatment modality for the correction of microgenia. Their use has provided satisfactory esthetic results by improving facial balance. However, bone resorption under these implants can occur. Case reports of 4 patients with the incidental radiographic finding of the presence of chin implants are presented. All 4 subjects had lateral cephalograms and panoramic x-rays taken as part of their orthodontic evaluation. One had a normal mandibular symphyseal contour, and 3 had bone resorption under the implants...
January 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28024083/direct-evidence-for-cancer-cell-autonomous-extracellular-protein-catabolism-in-pancreatic-tumors
#20
Shawn M Davidson, Oliver Jonas, Mark A Keibler, Han Wei Hou, Alba Luengo, Jared R Mayers, Jeffrey Wyckoff, Amanda M Del Rosario, Matthew Whitman, Christopher R Chin, Kendall J Condon, Alex Lammers, Katherine A Kellersberger, Brian K Stall, Gregory Stephanopoulos, Dafna Bar-Sagi, Jongyoon Han, Joshua D Rabinowitz, Michael J Cima, Robert Langer, Matthew G Vander Heiden
Mammalian tissues rely on a variety of nutrients to support their physiological functions. It is known that altered metabolism is involved in the pathogenesis of cancer, but which nutrients support the inappropriate growth of intact malignant tumors is incompletely understood. Amino acids are essential nutrients for many cancer cells that can be obtained through the scavenging and catabolism of extracellular protein via macropinocytosis. In particular, macropinocytosis can be a nutrient source for pancreatic cancer cells, but it is not fully understood how the tumor environment influences metabolic phenotypes and whether macropinocytosis supports the maintenance of amino acid levels within pancreatic tumors...
February 2017: Nature Medicine
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