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Dermal Implants

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https://www.readbyqxmd.com/read/28210552/capsular-contracture-in-implant-based-breast-reconstruction-the-effect-of-porcine-acellular-dermal-matrix
#1
Alessia M Lardi, Mark Ho-Asjoe, Klaus Junge, Jian Farhadi
BACKGROUND: Irradiation of implant-based breast reconstructions (BR) is known to increase capsular contracture (CC) rates on average by 4-fold over non-irradiated reconstructions. The use of acellular dermal matrix (ADM) has been associated with lower CC rates in non-irradiated reconstructions (0-3%). Experimental and clinical studies suggest that ADM may also reduce CC rates in irradiated breasts. The aim of this study was to evaluate CC rates in non-irradiated and irradiated one- and two-stage BRs performed with the assistance of porcine ADM (PADM)...
February 2017: Gland Surgery
https://www.readbyqxmd.com/read/28203509/the-breastrial-stage-ii-adm-breast-reconstruction-outcomes-from-definitive-reconstruction-to-3-months-postoperative
#2
Shaun D Mendenhall, Layla A Anderson, Jian Ying, Kenneth M Boucher, Leigh A Neumayer, Jayant P Agarwal
BACKGROUND: The Breast Reconstruction Evaluation of Acellular Dermal Matrix as a Sling Trial is a prospective randomized trial comparing outcomes of tissue expander breast reconstruction using either AlloDerm or DermaMatrix. The trial was divided into 3 outcome stages; this study reports stage II outcomes, which are those from the time of definitive reconstruction to 3 months postoperative. METHODS: A randomized trial was conducted to compare complication rates between AlloDerm and DermaMatrix groups...
January 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28197297/reconstruction-of-an-anterior-cervical-necrotizing-fasciitis-defect-using-a-biodegradable-polyurethane-dermal-substitute
#3
Marcus Jd Wagstaff, Yugesh Caplash, John E Greenwood
Introduction: Although we have previously described the use of a novel polyurethane biodegradable dermal substitute in the reconstruction of 20 free flap donor sites, and extensive cutaneous defects, including a large area of exposed calvarium secondary to burn injury, our experience with this material now extends to 35 free flap donor site reconstructions and 13 major or complex burns. Methods: The polyurethane material (NovoSorb BTM; PolyNovo Biomaterials Pty Ltd, Port Melbourne, Victoria, Australia) was recently employed in another complex wound scenario, implanted into a large anterior cervical cutaneous and soft-tissue defect remaining after serial radical debridement for necrotizing fasciitis...
2017: Eplasty
https://www.readbyqxmd.com/read/28190760/a-guide-to-prepectoral-breast-reconstruction-a%C3%A2-new-dimension-to-implant-based-breast-reconstruction
#4
REVIEW
Raghavan Vidya, Fahad Mujtaba Iqbal
Acellular dermal matrix has revolutionized implant-based breast reconstruction. Breast reconstruction has evolved from the traditional submuscular to the new prepectoral implant based (also known as muscle-sparing) reconstruction. The new technique is emerging as a highly popular surgery owing to its more minimal approach. We conducted a narrative review to guide prepectoral breast reconstruction, highlighting the technique, the need for appropriate patient selection, and areas for further research. We show that prepectoral breast reconstruction is safe, feasible, and has excellent short-term outcomes (cosmesis and patient satisfaction)...
January 9, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28188996/dual-delivery-of-growth-factors-with-coacervate-coated-poly-lactic-co-glycolic-acid-nanofiber-improves-neovascularization-in%C3%A2-a-mouse-skin-flap-model
#5
Min Suk Lee, Taufiq Ahmad, Jinkyu Lee, Hassan K Awada, Yadong Wang, Kyobum Kim, Heungsoo Shin, Hee Seok Yang
Random skin flaps are commonly used in plastic and reconstructive surgery for patients suffering from severe or large scale wounds or in facial reconstruction. However, skin flaps are sometimes susceptible to partial or complete necrosis at the distal parts of the flaps due to insufficient blood perfusion in the defected area. In order to improve neovascularization in skin flaps, we developed an exogenous growth factor (GF) delivery platform comprised of coacervate-coated poly(lactic-co-glycolic acid) (PLGA) nanofibers...
January 30, 2017: Biomaterials
https://www.readbyqxmd.com/read/28175968/augmentation-of-the-nipples-reconstructed-with-modified-top-hat-flap-using-dermal-grafts-in-implant-based-breast-reconstruction-a-comparative-study
#6
Hoon Kim, Sang Il Kim, Won Ha, Chi Sun Yoon, Taik Jong Lee, Kyu Nam Kim
BACKGROUND: Nipple reconstruction in implant-based breast reconstruction remains challenging, as the remaining thin skin envelope results in a less projected neo-nipple with a reduced volume. This study presents a modified top-hat flap technique with rolled dermal grafts from the dog-ears of lateral wings for augmenting reconstructed nipples during implant-based breast reconstruction. METHODS: Between April 2011 and December 2014, among 34 patients who underwent immediate post-mastectomy reconstruction with a direct silicone implant, nipple reconstruction was performed using the modified top-hat flap technique in only 21 patients (group A), whereas 13 patients underwent the modified top-hat flap technique with rolled dermal grafts from the dog-ears of lateral wings (group B)...
February 7, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28170187/a-selective-cell-population-from-dermis-strengthens-bone-regeneration
#7
Tingliang Wang, Jinguang He, Yang Zhang, Wenjun Shi, Jiasheng Dong, Ming Pei, Lian Zhu
Finding appropriate seed cells for bone tissue engineering remains a significant challenge. Considering that skin is the largest organ, we hypothesized that human bone morphogenetic protein receptor type IB (BmprIB)+ dermal cells could have enhanced osteogenic capacity in the healing of critical-sized calvarial defects in an immunodeficient mouse model. In this study, immunohistochemical staining revealed that BmprIB was expressed throughout reticular dermal cells; the positive expression rate of BmprIB was 3...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28165491/anodically-grown-titania-nanotube-induced-cytotoxicity-has-genotoxic-origins
#8
M Sheikh Mohamed, Aida Torabi, Maggie Paulose, D Sakthi Kumar, Oomman K Varghese
Nanoarchitectures of titania (TiO2) have been widely investigated for a number of medical applications including implants and drug delivery. Although titania is extensively used in the food, drug and cosmetic industries, biocompatibility of nanoscale titania is still under careful scrutiny due to the conflicting reports on its interaction with cellular matter. For an accurate insight, we performed in vitro studies on the response of human dermal fibroblast cells toward pristine titania nanotubes fabricated by anodic oxidation...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28156625/clinical-and-health-care-setting-of-patients-admitted-at-pain-control-center-hospice-of-solofra-a-feasibility-model-of-end-of-life-care-in-the-avellino-province-of-italy
#9
Carmela Fasano, Luisa M Rizzo, A M Strollo, Elena De Vinco, Vincenzo Landolfi, Elena Altieri, Mario Nicola Vittorio Ferrante, Sergio Canzanella, Giuseppe Servillo, Lucia Genua, Maddalena Zampi, Gaetano D'Onofrio
: 59 Background: The Pain Control Center Hospice of Solofra (Italy) is managed with a mixed public / private, the first experience in the Campania region.We have evaluated the treatment procedures and the clinical outcome to make a comparison by between 123 evaluable patients in palliative care in 2015 and 232 evaluable patients in the biennium 2012-2014. METHODS: The following characteristics: patient gender, mean hospitalization time, differentiation between cancer and non cancer patients, medical weapon use, venous access type, enteral and parenteral feeding, pain killer use,Karnofsky scale...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28156094/the-interplay-between-surface-nanotopography-and-chemistry-modulates-collagen-i-and-iii-deposition-by-human-dermal-fibroblasts
#10
Akash Bachhuka, John Dominic Hayball, Louise E Smith, Krasimir Vasilev
The events within the foreign body response are similar to, but ultimately different from the wound healing cascade. Collagen production by fibroblasts is known to play a vital role in wound healing and device fibrous encapsulation. However, the influence of surface nanotopography on collagen deposition by these cells has not been reported so far. To address this gap, we have developed model substrata having surface nanotopography of controlled height of 16, 38 and 68 nm and tailored outermost surface chemistry of amines, carboxyl acid and pure hydrocarbon...
February 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28131845/safer-topical-treatment-for-inflammation-using-5%C3%AE-tetrahydrocorticosterone-in-mouse-models
#11
Annalisa Gastaldello, Dawn E W Livingstone, Amber J Abernethie, Nicola Tsang, Brian R Walker, Patrick W F Hadoke, Ruth Andrew
Use of topical glucocorticoid for inflammatory skin conditions is limited by systemic and local side-effects. This investigation addressed the hypothesis that topical 5α-tetrahydrocorticosterone (5αTHB, a corticosterone metabolite) inhibits dermal inflammation without affecting processes responsible for skin thinning and impaired wound healing. The topical anti-inflammatory properties of 5αTHB were compared with those of corticosterone in C57Bl/6 male mice with irritant dermatitis induced by croton oil, whereas its effects on angiogenesis, inflammation, and collagen deposition were investigated by subcutaneous sponge implantation...
January 24, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28119764/relevant-in-vitro-predictors-of-human-acellular-dermal-matrix-associated-inflammation-and-capsule-formation-in-a-nonhuman-primate-subcutaneous-tissue-expander-model
#12
Maryellen Sandor, Patrick Leamy, Pearl Assan, Amardeep Hoonjan, Li-Ting Huang, Marianne Edwards, Wenqi Zuo, Hui Li, Hui Xu
Objective: Benchtop methods were evaluated for preclinical inflammation/capsule formation correlation following implantation of human acellular dermal matrices. Methods: Dermal matrices were compared with native dermis for structure (histology, scanning electron microscopy), collagen solubility (hydroxyproline), enzymatic susceptibility (collagenase), and thermal stability (differential scanning calorimetry). Results were compared with implantation outcomes in a primate tissue expander model. Results: Native dermis, electron beam-sterilized, and freeze-dried human acellular dermal matrices had equivalent morphology, acid-soluble collagen (60...
2017: Eplasty
https://www.readbyqxmd.com/read/28117106/stress-induced-premature-senescence-of-dermal-papilla-cells-compromises-hair-follicle-epithelial-mesenchymal-interaction
#13
Wen-Yen Huang, Yi-Ching Huang, Kai-Shin Huang, Chih-Chieh Chan, Hsien-Yi Chiu, Ren-Yeu Tsai, Jung-Yi Chan, Sung-Jan Lin
BACKGROUND: Hair follicle is miniorgan constituted by keratinocytes and its distinctive mesenchyme of dermal papilla. Its aging is characterized by organ atrophy and impaired stem cell activation and differentiation. The contribution of dermal papilla to hair follicle aging change is not well understood. OBJECTIVE: This work was aimed at exploring the possible role of premature dermal papilla senescence in the pathogenesis of hair follicle aging. METHODS: Dermal papilla cells were challenged with H2O2 to induce premature senescence and the proliferation, apoptosis, gene expression and protein secretion were characterized...
January 5, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28106696/use-of-acellular-dermal-matrix-in-treatment-of-congenital-muscular-torticollis-in-patients-over-eight-years-of-age
#14
Hyung Min Hahn, Kyung Hoon Cook, Il Jae Lee, Dong Ha Park, Myong Chul Park
BACKGROUND: Treatment for neglected or recurred congenital muscular torticollis should be differentiated from primary patients due to the long-standing adjacent tissue contracture. The aim of this study was to evaluate the effect of acellular dermal matrix (ADM) on surgery of recurred and neglected patients of congenital muscular torticollis. METHODS: Forty-nine patients were included in the study. All patients underwent resection at the distal end of the sternocleidomastoid muscle...
January 18, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28092230/octamethylcyclotetrasiloxane-d4
#15
(no author information available yet)
Octamethylcyclotetrasiloxane (D4; CAS No. 556-67-2) is used as a monomer in the manufacture of polymeric materials, which are widely used in various industrial and/or medical applications, such as breast implants. D4 has a relatively low order of toxicity following acute administration via the oral, dermal, and inhalation routes of exposure and is not considered to be a dermal or eye irritant or to be a dermal sensitizer. There is no appreciable dermal absorption of D4 based on results from in vivo and in vitro studies...
January 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28076885/cross-linking-of-porcine-acellular-dermal-matrices-negatively-affects-induced-neovessel-formation-using-platelet-rich-plasma-in-a-rat-model-of-hernia-repair
#16
Joseph S Fernandez-Moure, Jeffrey L Van Eps, Leif Peterson, Beverly A Shirkey, Zachary K Menn, Fernando Cabrera, Azim Karim, Ennio Tasciotti, Bradley K Weiner, Warren A Ellsworth
The degree of crosslinking within acellular dermal matrices (ADM) seems to correlate to neovascularization when used in ventral hernia repair (VHR). Platelet-rich plasma (PRP) enhances wound healing through several mechanisms including neovascularization, but research regarding its effect on soft tissue healing in VHR is lacking. We sought to study the effect of crosslinking on PRP-induced neovascularization in a rodent model of bridging VHR. We hypothesized that ADM crosslinking would negatively affect PRP-induced neovessel formation...
January 11, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28070650/revision-total-knee-arthroplasty-due-to-bone-cement-and-metal-hypersensitivity
#17
Ioannis P Stathopoulos, Nicolaos Andrianopoulos, Dimitrios Paschaloglou, Ioannis Tsarouchas
INTRODUCTION: Hypersensitivity to implants is a rare complication of total knee arthroplasty (TKA). Metal and, less frequently, bone cement can produce allergic symptomatology that if unresponsive to conservative treatment could lead to revision. MATERIALS AND METHODS: We present the case of a patient with generalized pruritus and metal taste starting during the first postoperative month after TKA. Dermal allergy exams revealed that the patient had hypersensitivity to nickel sulphate and cobalt chloride and bone cement...
February 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28051266/one-stage-breast-reconstruction-techniques-in-elderly-patients-to-preserve-quality-of-life
#18
M Maruccia, M Mazzocchi, L A Dessy, M G Onesti
OBJECTIVE: The aim of this study was to review one-stage breast reconstruction techniques performed in elderly patients at our institution to identify the criteria of selection of each in terms of outcomes and quality of life. PATIENTS AND METHODS: Patients older than 65 years who underwent one-stage breast reconstruction between January 2004 and July 2014 at our hospital were included. Patients and procedure-related data were collected from the medical records...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28042321/pre-vascularization-enhances-therapeutic-effects-of-human-mesenchymal-stem-cell-sheets-in-full-thickness-skin-wound-repair
#19
Lei Chen, Qi Xing, Qiyi Zhai, Mitchell Tahtinen, Fei Zhou, Lili Chen, Yingbin Xu, Shaohai Qi, Feng Zhao
Split thickness skin graft (STSG) implantation is one of the standard therapies for full thickness wound repair when full thickness autologous skin grafts (FTG) or skin flap transplants are inapplicable. Combined transplantation of STSG with dermal substitute could enhance its therapeutic effects but the results remain unsatisfactory due to insufficient blood supply at early stages, which causes graft necrosis and fibrosis. Human mesenchymal stem cell (hMSC) sheets are capable of accelerating the wound healing process...
2017: Theranostics
https://www.readbyqxmd.com/read/28040611/factors-affecting-the-mechanical-behavior-of-collagen-hydrogels-for-skin-tissue-engineering
#20
Marco Pensalfini, Alexander E Ehret, Silvia Stüdeli, Daniela Marino, Andres Kaech, Ernst Reichmann, Edoardo Mazza
The effect of the production factors yielding a functional dermal substitute was investigated by means of monotonic and cyclic uniaxial tensile tests, as well as electron microscopy visualizations. The role of (i) plastic compression, (ii) product incubation, and (iii) cell permanence in the collagenous matrix in order to achieve a skin-like behavior were characterized in terms of material and structural stiffness, in-plane kinematics, and cyclic response, as well as pore size and network density. The plastic compression resulted in a denser and stiffer material, while no corresponding change was observed in the behavior of the entire structure...
December 9, 2016: Journal of the Mechanical Behavior of Biomedical Materials
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