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Dermal Implants

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https://www.readbyqxmd.com/read/28727237/pre-hydrated-sterile-acellular-dermal-matrix-allograft-in-breast-reconstruction-review-of-a-single-unit-s-experience
#1
Justin James, Brigid Corrigan, Christobel Saunders
BACKGROUND: The acellular dermal matrix (Flex HD) (FHD) became available for use in Western Australia in 2014 to aid prosthetic breast reconstruction and this descriptive study aims to review and discuss a single institution's experience since its introduction. METHODS: By retrospective case note, review data were collected for all patients who underwent prosthetic breast reconstruction with the aid of FHD between January 2014 and August 2015 in our institution...
July 20, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28710505/application-of-human-acellular-breast-dermal-matrix-abdm-in-implant-based-breast-reconstruction-an-experimental-study
#2
Nahid Nafisi, Mohammad Esmaeil Akbari, Fatemeh Mahjoub, Mohammad Javad Mohseni, Shabnam Sabetkish, Reza Khorramirouz, Mona Tehrani, Abdol-Mohammad Kajbafzadeh
BACKGROUND: The use of acellular dermal matrices (ABDM) has become more common for breast reconstruction to improve postoperative outcomes. We evaluated the efficacy of breast reconstruction by the application of human ABDM in a sheep model. METHODS: The sheep in group I (GI) (N = 4) underwent the following procedures on the right side: (1) breast reconstruction using human ABDM after total mastectomy, (2) human ABDM under the skin, near the breast area and on the left side, (3) fat injection and human ABDM after partial mastectomy, and (4) replacement of ABDM in the abdominal wall far from the breast...
July 14, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28709788/making-sense-of-metal-allergy-and-hypersensitivity-to-metallic-implants-in-relation-to-hand-surgery
#3
REVIEW
Thomas J Christensen, Shefali A Samant, Alexander Y Shin
All metals implanted into a biological system undergo some degree of corrosion depending upon its composition. The electrochemical process of corrosion produces free metal ions, which may activate the host's immune system through a variety of mechanisms. Whereas dermal metal hypersensitivity is common, affecting 10% to 15% of the population, the immune reaction from implanted metals is much less common (< 0.1%), but has been associated with metal allergy and hypersensitivity producing a multitude of patient symptoms...
July 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28706796/arthroscopic-removal-of-a-loose-polyethylene-glenoid-component-with-bone-grafting-and-patch-augmentation-for-glenoid-osseous-defect
#4
Jeffrey T Abildgaard, Jared C Bentley, Richard J Hawkins, John M Tokish
Glenoid component loosening is a common cause of failed total shoulder arthroplasty. Many different treatment options exist for the management of a symptomatic loose polyethylene glenoid component, ranging from component removal to revision arthroplasty. Arthroscopic removal and conversion to hemiarthroplasty provides a minimally invasive management option that avoids takedown of the subscapularis and allows for humeral prosthesis retention. Frequently, however, osteolysis is encountered concomitantly leading to cavitary glenoid bone deficits at the time of glenoid implant removal, limiting both immediate and future treatment options...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28692604/determining-the-differential-effects-of-stretch-and-growth-in-tissue-expanded-skin-combining-isogeometric-analysis-and-continuum-mechanics-in-a-porcine-model
#5
Chad A Purnell, Michael S Gart, Adrián Buganza-Tepole, Joanna P Tomaszewski, Jolanta M Topczewska, Ellen Kuhl, Arun K Gosain
BACKGROUND: The relative effects of skin growth and stretch during tissue expansion have not been studied. The authors use novel analytic techniques that allow calculation of these factors at any point of a skin patch. OBJECTIVE: The authors sought to determine how stretch and growth change with different expansion rates and to correlate these values with histologic and cellular changes in skin. MATERIALS AND METHODS: Two minipigs were implanted with a total of 5 tissue expanders under tattooed skin grids...
July 6, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28689433/experimental-and-early-investigational-drugs-for-androgenetic-alopecia
#6
Hongwei Guo, Wendi Victor Gao, Hiromi Endo, Kevin John McElwee
Treatments for androgenetic alopecia constitute a multi-billion-dollar industry, however, currently available therapeutic options have variable efficacy. Consequently, in recent years small biotechnology companies and academic research laboratories have begun to investigate new or improved treatment methods. Research and development approaches include improved formulations and modes of application for current drugs, new drug development, development of cell-based treatments, and medical devices for modulation of hair growth...
July 12, 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28684336/coculture-of-mesenchymal-stem-cells-and-endothelial-cells-enhances-host-tissue-integration-and-epidermis-maturation-through-akt-activation-in-gelatin-methacryloyl-hydrogel-based-skin-model
#7
Xiaofei Zhang, Jun Li, Pengxiang Ye, Guifang Gao, Karen Hubbell, Xiaofeng Cui
A major challenge for clinical use of skin substitutes is insufficient host tissue integration leading to loosening and partial necrosis of the implant. In this present study, a three-dimensional (3D) coculture system constructed using human umbilical cord mesenchymal stem cells (uc-MSCs) and umbilical vein endothelial cells (HUVECs) encapsulated in gelatin methacryloyl (GelMA) hydrogels was evaluated to determine the outcomes of cell-cell interactions in vitro and in vivo. The results revealed that GelMA hydrogels displayed minor cytotoxicity on both cell types...
July 3, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28669866/procedures-and-applications-of-long-term-intravital-microscopy
#8
REVIEW
Chloé Prunier, Na Chen, Laila Ritsma, Nienke Vrisekoop
Intravital microscopy (IVM) is increasingly used in biomedical research to study dynamic processes at cellular and subcellular resolution in their natural environment. Long-term IVM especially can be applied to visualize migration and proliferation over days to months within the same animal without recurrent surgeries. Skin can be repetitively imaged without surgery. To intermittently visualize cells in other organs, such as liver, mammary gland and brain, different imaging windows including the abdominal imaging window (AIW), dermal imaging window (DIW) and cranial imaging window (CIW) have been developed...
June 29, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28658716/sustained-secretion-of-anti-tnf-alpha-monoclonal-antibody-from-ex-vivo-genetically-engineered-dermal-tissue-demonstrates-therapeutic-activity-in-mouse-model-of-rheumatoid-arthritis
#9
Inbal Zafir-Lavie, Reem Miari, Shay Sherbo, Simi Krispel, Osnat Tal, Atar Liran, Tamar Shatil, Felix Badinter, Haim Goltsman, Nir Shapir, Itai Benhar, Garry A Neil, Amos Panet
BACKGROUND: Rheumatoid arthritis is a symmetric inflammatory polyarthritis associated with high concentrations of pro-inflammatory cytokines including TNF-α. Adalimumab is a monoclonal antibody (mAb) that binds TNF-α, and is widely used to treat rheumatoid arthritis. Despite its proven clinical efficacy, adalimumab and other therapeutic mAbs have disadvantages including the requirement for repeated bolus injections and the appearance of treatment limiting anti-drug antibodies. To address these issues, we have developed an innovative ex-vivo gene therapy approach, Transduced Autologous Restorative Gene Therapy (TARGT), to produce and secrete adalimumab for the treatment of RA...
June 28, 2017: Journal of Gene Medicine
https://www.readbyqxmd.com/read/28655891/a-gelatin-sulfonated-silk-composite-scaffold-based-on-3d-printing-technology-enhances-skin-regeneration-by-stimulating-epidermal-growth-and-dermal-neovascularization
#10
Si Xiong, Xianzhu Zhang, Ping Lu, Yan Wu, Quan Wang, Heng Sun, Boon Chin Heng, Varitsara Bunpetch, Shufang Zhang, Hongwei Ouyang
One of the key problems hindering skin repair is the deficiency of dermal vascularization and difficulty of epidermis regeneration, which makes it challenging to fabricate scaffolds that can biologically fulfill the requirements for skin regeneration. To overcome this problem, three-dimensional printing was used to fabricate a gelatin-sulfonated silk composite scaffold that was incorporated with basic fibroblast growth factor 2 (FGF-2) through binding with a sulfonic acid group (SO3) (3DG-SF-SO3-FGF). The efficacy and mechanism by which the 3DG-SF-SO3-FGF scaffolds promote skin regeneration were investigated both within in vitro cell culture and in vivo with a full-thickness skin defect model...
June 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28652438/a-head-to-head-comparison-between-surgimend%C3%A2-fetal-bovine-acellular-dermal-matrix-and-tutomesh%C3%A2-a-bovine-pericardium-collagen-membrane-in-breast-reconstruction-in-45-cases
#11
Christian Eichler, Jeria Efremova, Klaus Brunnert, Christian M Kurbacher, Oleg Gluz, Julian Puppe, Mathias Warm
BACKGROUND/AIM: The use of acellular dermal matrices (ADM) has become a widely used option in breast reconstruction. A great deal of literature is available, totaling over 3,200 ADM reconstructions. Head-to-head comparisons between SurgiMend® and Tutomesh® are not yet reported. These are the first comparative clinical data reported on the use of Tutomesh® in breast reconstruction. Postoperative complication rates and costs for these devices were evaluated. PATIENTS AND METHODS: This is a retrospective analysis of a 2-year experience with both SurgiMend® - fetal bovine acellular dermal matrix and Tutomesh® - a bovine pericardium collagen membrane in breast reconstruction in 45 cases from 2014-2015...
July 2017: In Vivo
https://www.readbyqxmd.com/read/28651005/optimization-of-a-murine-and-human-tissue-model-to-recapitulate-dermal-and-pulmonary-features-of-systemic-sclerosis
#12
Tomoya Watanabe, Tetsuya Nishimoto, Logan Mlakar, Jonathan Heywood, Maya Malaab, Stanley Hoffman, Carol Feghali-Bostwick
The murine bleomycin (BLM)-induced fibrosis model is the most widely used in systemic sclerosis (SSc) studies. It has been reported that systemic delivery of BLM via continuous diffusion from subcutaneously implanted osmotic minipumps can cause fibrosis of the skin, lungs, and other internal organs. However, the mouse strain, dosage of BLM, administration period, and additional important features differ from one report to the next. In this study, by employing the pump model in C57BL/6J mice, we show a dose-dependent increase in lung fibrosis by day 28 and a transient increase in dermal thickness...
2017: PloS One
https://www.readbyqxmd.com/read/28624524/a-direct-comparison-of-porcine-strattice%C3%A2-and-bovine-surgimend%C3%A2-acellular-dermal-matrices-in-implant-based-immediate-breast-reconstruction
#13
Jessica F Ball, Yezen Sheena, Dina M Tarek Saleh, Parto Forouhi, Sarah L Benyon, Michael S Irwin, Charles M Malata
INTRODUCTION: Acellular dermal matrix (ADM) assisted implant-based breast reconstruction (IBBR) has grown in popularity over traditional submuscular techniques. Numerous human, bovine or porcine derived ADMs are available with the type used varying considerably worldwide. Yet, comparative evidence for the efficacy of different ADMs particularly xenogenic is limited. This study directly compares early outcomes of porcine (Strattice™) and bovine (Surgimend™) ADMs in IBBR. METHOD: Retrospective study of sequential experience of immediate IBBR using Strattice or Surgimend ADM...
May 19, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28605205/analysis-of-factors-influencing-drain-amount-time-to-drain-removal-and-seroma-formation-in-patients-undergoing-immediate-expander-implant-breast-reconstruction
#14
Kyong-Je Woo, Joo Myong Paik, Goo-Hyun Mun, Jai-Kyong Pyon, Byung-Joon Jeon, Sa Ik Bang
BACKGROUND: Placement of a closed suction drain is a common cause of patient complaints, such as postoperative pain or discomfort following immediate expander-implant breast reconstruction. This study aims to identify factors that affect drainage volume, time to drain removal, and seroma formation. METHODS: A retrospective chart review of prospectively collected data was conducted on patients who underwent immediate expander-implant breast reconstructions following nipple-sparing or skin-sparing mastectomy without skin excision (nipple areolar complex excision only) between February 2010 and April 2015...
June 12, 2017: Journal of Plastic Surgery and Hand Surgery
https://www.readbyqxmd.com/read/28601875/activities-of-mscs-derived-from-transgenic-mice-seeded-on-adm-scaffolds-in-wound-healing-and-assessment-by-advanced-optical-techniques
#15
Ning Wang, Hanping Liu, Xuefeng Li, Qilei Zhang, Maosheng Chen, Ying Jin, Xiaoyuan Deng
BACKGROUND/AIMS: Bone marrow Mesenchymal stem cells (MSCs) are promising for promoting cutaneous wound healing through reinforcing cellular processes. We evaluated the effect of GFP-tagged MSCs transplantation on skin regeneration in excisional wounds in mice. METHODS: MSCs from GFP-labeled transgenic mice were co-cultured with acellular dermal matrix (ADM) scaffolds, and MSC-ADM scaffolds were transplanted into surgical skin wounds of BALB/c mice. After implantation, the survival and behavior of MSCs were examined by second harmonic generation and two-photon excitation fluorescence imaging, western blotting and DNA amplification and sequencing...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28593488/optimizing-patient-selection-for-direct-to-implant-immediate-breast-reconstruction-using-wise-pattern-skin-reducing-mastectomy-in-large-and-ptotic-breasts
#16
Amir Inbal, Eyal Gur, Benjamin T Lemelman, Daphna Barsuk, Tehilla Menes, David Leshem, Yoav Barnea
BACKGROUND: Immediate breast reconstruction in large and ptotic breasts is challenging, often requiring skin-reducing procedures. The Wise-pattern skin-reducing mastectomy (WPSRM) technique provides reliable one-stage implant coverage using the pectoralis muscle and a de-epithelialized inferiorly based dermal flap. However, de-vascularization may result in mastectomy skin flap necrosis. We aimed to critically evaluate and isolate patients at high risk of complications using this procedure...
June 7, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28591940/cost-analysis-of-postmastectomy-reconstruction-a-comparison-of-two-staged-implant-reconstruction-using-tissue-expander-and-acellular-dermal-matrix-with-abdominal-based-perforator-free-flaps
#17
Bao Ngoc N Tran, Ayotunde Fadayomi, Samuel J Lin, Dhruv Singhal, Bernard T Lee
BACKGROUND AND OBJECTIVES: Two staged tissue expander-implant with acellular dermal matrix (TE/I + ADM) and deep inferior epigastric perforator (DIEP) flap are the most common implant and autologous methods of reconstruction in the U.S. Implant-based techniques are disproportionally more popular, partially due to its presumed cost effectiveness. We performed a comprehensive cost analysis to compare TE/I + ADM and DIEP flap. METHODS: A comparative cost analysis of TE/I + ADM and DIEP flap was performed...
June 7, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28591935/cost-analysis-of-postmastectomy-reconstruction-a-comparison-of-two-staged-implant-reconstruction-using-tissue-expander-and-acellular-dermal-matrix-with-abdominal-based-perforator-free-flaps
#18
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
June 7, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28575986/co-culturing-epidermal-keratinocytes-and-dermal-fibroblasts-on-nano-structured-titanium-surfaces
#19
Jing Tan, Chanjuan Zhao, Jie Zhou, Ke Duan, Jianxin Wang, Xiong Lu, Jie Weng, Bo Feng
Long-term success of percutaneous implants depends mostly on the stable connection between the soft tissue and implant surface because bacterial invasion and infection can be prevented by a proper seal between the skin and implant. The percutaneous seal is affected by responses of keratinocytes and/or fibroblasts to the implant. Herein, the in vitro functionality of fibroblasts and keratinocytes on titania nanotubes (TNT) and polished titanium (pTi) surfaces was investigated by different culture methods. Adhesion, proliferation, morphology, and differentiation were evaluated by cell viability assay, fluorescence microscopy, real-time quantitative polymerase chain reaction (RT-PCR), and indirect immunofluorescence...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28571065/cheek-and-chin-implants-to-enhance-facelift-results
#20
Russell W H Kridel, Sagar Patel
The traditional rhytidectomy addresses facial and neck aging as it relates to soft tissue laxity. The modern volumetric facelift provides optimal results by addressing not only skin laxity but also the loss of volume secondary to tissue atrophy and bony resorption. While multiple techniques including fat grafting, dermal fillers, and tissue resuspension are used to correct the tissue loss, alloplastic midface augmentation remains the most permanent method. In our practice we often address midface cheek hollowness or atrophy with the placement of submalar implants at the time of rhytidectomy...
June 2017: Facial Plastic Surgery: FPS
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