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https://www.readbyqxmd.com/read/28534175/-aseptic-loosening-of-total-ankle-replacement-two-stage-revision-with-bone-augmentation-of-osseous-defects-and-secondary-prosthesis-implantation
#1
A Barg, M Wiewiorski, V Valderrabano
OBJECTIVE: To remove loosened ankle prosthesis components, perform osseous defect augmentation, and reimplant definitive prosthesis components to preserve ankle range of motion. INDICATIONS: Aseptic loosening of the tibial and/or talar ankle prosthesis components with substantial bone defect. CONTRAINDICATIONS: General surgical/anesthesiological risks, infections, critical soft tissue conditions, nonmanageable hindfoot instability, neurovascular impairment of the lower extremity, neuroarthropathy, substantial nonreconstructable osseous defects with or without cysts on the tibial and/or talar side, noncompliance, primary total ankle replacement (TAR) using intramedullary fixation (stem fixation), severely reduced bone quality, insulin-dependent diabetes mellitus, smoking, unrealistic patients' expectations, high activity in sports...
May 22, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28532087/the-repairing-of-full-thickness-skin-deficiency-and-its-biological-mechanism-using-decellularized-human-amniotic-membrane-as-the-wound-dressing
#2
Mengsheng Song, Weiqing Wang, Qihua Ye, Shizhong Bu, Zhisen Shen, Yabin Zhu
Human amniotic membrane (HAM) was a biocompatible scaffold with advantages of anti-inflammatory, low antigen, feasibility, tolerance and low cost. In our previous work, HAM was treated to be decellularized using surfactant, lipase and DNAase methods and the efficacy as an implantable biological mesh was verified after decellularization treatment. In this work, we used the previous protocol to decellularize the fresh HAM, and applied it to repair full-thickness skin defects with Sprague-Dawley rats as the test animals...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529754/chitosan-poly-caprolactone-nanofibers-for-skin-repair
#3
Sheeny Lan Levengood, Ariane E Erickson, Fei-Chien Chang, Miqin Zhang
Dermal wounds, both acute and chronic, represent a significant clinical challenge and therefore the development of novel biomaterial-based skin substitutes to promote skin repair is essential. Nanofibers have garnered attention as materials to promote skin regeneration due to the similarities in morphology and dimensionality between nanofibers and native extracellular matrix proteins, which are critical in guiding cutaneous wound healing. Electrospun chitosan-poly(caprolactone) (CPCL) nanofiber scaffolds, which combine the important intrinsic biological properties of chitosan and the mechanical integrity and stability of PCL, were evaluated as skin tissue engineering scaffolds using a mouse cutaneous excisional skin defect model...
March 7, 2017: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://www.readbyqxmd.com/read/28528480/full-endoscopic-treatment-of-dural-tears-in-lumbar-spine-surgery
#4
Joachim M Oertel, Benedikt W Burkhardt
PURPOSE: An incidental durotomy is a common complication of spinal surgery. Its treatment remains challenging, especially in endoscopic procedures. The objective of this study is to describe a technique for endoscopic dural closure which is safe and effective. METHODS: From a prospective database all endoscopic spinal procedures with incidental durotomy were identified. Retrospectively, video recordings were analysed with a special reference to the applied technique of dural closure...
May 20, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28526905/effectiveness-of-acellular-dermal-matrix-on-autologous-split-thickness-skin-graft-in-treatment-of-deep-tissue-defect-esthetic-subjective-and-objective-evaluation
#5
Yoo Jung Lee, Myong Chul Park, Dong Ha Park, Hyung Min Hahn, Sue Min Kim, Il Jae Lee
BACKGROUND: A split-thickness skin graft (STSG) is performed to cover a large full-thickness skin defect. Esthetic and functional deficits can result, and many studies have sought to overcome them. This study compared the effectiveness of the acellular dermal matrix (ADM) graft and STSG concerning esthetic and functional effectiveness of ADM on scar quality. METHODS: Of the patients who underwent anterolateral thigh free flap from 2011 to 2015, patients who received skin graft only (n = 10) or skin graft with ADM (n = 20) for coverage of the donor site were enrolled...
May 19, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28525675/acellular-dermal-matrix-and-heel-reconstruction-a-new-prospective
#6
Alessandro Scalise, Matteo Torresetti, Federica Verdini, Marianna Capecci, Elisa Andrenelli, Alessandro Mengarelli, Maria Gabriella Ceravolo, Sandro Fioretti, Giovanni Di Benedetto
BACKGROUND: Heel reconstruction represents a challenge for all plastic surgeons due to the anatomical and functional features of this weight-bearing area. In the last decade a combined use of acellular dermal matrices and skin grafts has been proposed as a reliable and less invasive alternative for complex wound management; nevertheless only a few cases have been reported in the literature. METHODS: We describe the long-term outcome of 2 cases of severe degloving trauma of the plantar region with massive soft tissue defects of the foot, that underwent surgical reconstruction with artificial dermis and skin grafts...
May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28523312/an-evaluation-of-a-collagen-based-material-osseointegration
#7
Horia Octavian Manolea, Monica Mihaela CrăiŢoiu, LaurenŢiu Mogoantă, Ionela Teodora Dascălu, Alina Iren Moraru, Doriana Agop Forna, Răzvan MercuŢ
The aim of this study is to evaluate the osseointegration of a collagen-based material Alveoprotect, suitable for socket preservations, while preserving the vestibular bone lamella. This material is intended to be used in the field of implantology for smaller bone defects. Thus, 3-mm diameter experimental cavities were carried out on the calvaria and maxilla of 18 laboratory Wistar rats. The cavities were augmented with the collagen fleece Alveoprotect or left unaugmented as a control group and half of the laboratory animals were sacrificed after two months, and the other half after four months in order to evaluate in vivo the way in which the inserted material is osseointegrated...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28522300/primary-reconstructive-method-for-tracheal-defect-from-invasion-by-differentiated-thyroid-carcinoma
#8
Atsumori Hamahata, Takeshi Beppu, Takashi Yamaki, Hiroyuki Sakurai
Differentiated thyroid carcinoma is not highly malignant, and thus surgical resection is the most common treatment even if the carcinoma has invaded the trachea. Although some cases exist in which the carcinoma invades the trachea, using the tracheal window resection method allows complete resection of the carcinoma. Yet these patients must often control a large tracheocutaneous wound until reconstructive surgery is performed because such surgery occurs secondarily. Our hospital admitted three patients for which tracheally invasive, differentiated thyroid carcinoma was surgically resected...
May 15, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28520219/plasminogen-activator-inhibitor-type-1-as-a-regulator-of-fibrosis
#9
Reyhaneh Rabieian, Maryam Boshtam, Mahshid Zareei, Shirin Kouhpayeh, Aria Masoudifar, Hamed Mirzaei
Fibrosis is known as a frequent and irreversible pathological condition which is associated with organ failure. Tissue fibrosis is a central process in a variety of chronic progressive diseases such as diabetes, hypertension, and persistent inflammation. This state could contribute to chronic injury and the initiation of tissue repair. Fibrotic disorders represent abnormal wound healing with defective matrix turnover and clearance that lead to excessive accumulation of extracellular matrix components. A variety of identified growth factors, cytokines, and persistently activated myofibroblasts have critical roles in the pathogenesis of fibrosis...
May 18, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28518182/triple-layered-closure-of-an-oroantral-fistula-a-case-report
#10
Eric George
Oroantral fistulae (OAF) are surgical sequelae that require complete resection and often leave large defects for the surgeon to repair. Closing these lesions is often technique sensitive and requires a detailed protocol, which, if not adhered to, can lead to recurrence. This case report presents a combined approach to closing an OAF by first excising the fistula and then resecting to retrieve the buccal fat pad to form a pedicle graft over the wound site. Next, a platelet-rich fibrin membrane is sandwiched over the buccal fat pad and completely covered by a buccal advancement flap...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28512866/medial-sural-artery-perforator-free-flap-for-the-reconstruction-of-leg-foot-and-ankle-defect-an-excellent-option
#11
Jyoshid R Balan
BACKGROUND: The defects over the leg, foot and ankle are best covered with a thin pliable flap. The use of muscle flap for the reconstruction of these defects leaves a grafted, aesthetically inferior result. The medial sural artery perforator (MSAP) free flap gives a thin pliable tissue for the reconstruction with better aesthesis. METHODS: The study design was retrospective case analysis over a period of 2 years. All the patients who underwent flap for leg, foot and ankle defect reconstruction in the form of MSAP free flap were included in the study...
May 16, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28509671/complications-in-facial-mohs-defect-reconstruction
#12
Angelique M Berens, Sarah R Akkina, Sapna A Patel
PURPOSE OF REVIEW: To review the recent literature in regards to complications after reconstruction of Mohs defects, outline common pitfalls and to discuss the literature on avoiding complications as outlined per aesthetic subunit. RECENT FINDINGS: Complications in facial Mohs reconstruction commonly consist of infection, wound necrosis and dehiscence, hematoma and suboptimal scarring. However, site-specific complications such as hairline or eyebrow distortion, eyelid retraction or ectropion, nasal contour abnormality, alar retraction, nasal valve compromise, significant facial asymmetry or even oral incompetence must also be considered...
May 13, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28509443/hemodynamically-stimulated-and-in-vivo-generated-axially-vascularized-soft-tissue-free-flaps-for-closure-of-complex-defects-evaluation-in-a-small-animal-model
#13
Volker J Schmidt, Johanna O Wietbrock, Nico Leibig, Jochen F Hernekamp, Dominic Henn, Christian A Radu, Ulrich Kneser
The arteriovenous (AV) loop model permits the creation of significant volumes of axially vascularized tissue that represents an alternative to conventional free flaps, circumventing their common limitations. However, such AV-loop-based flaps have never before been examined in standardized animal models with respect to their suitability for reconstruction of critical bone exposing defects. In the course of our preliminary studies, we implemented a novel defect model in rats that provides standardized and critical wound conditions and evaluated whether AV-loop-generated flaps are suitable for free microsurgical transfer and closure of composite defects...
May 16, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28509317/morphology-of-the-cesarean-section-scar-in-the-non-pregnant-uterus-after-one-elective-cesarean-section
#14
Michał Pomorski, Tomasz Fuchs, Anna Rosner-Tenerowicz, Mariusz Zimmer
OBJECTIVES: A growing number of studies suggest that the incomplete healing of the CS scar in the uterus increase the risk of uterine dehiscence or rupture during subsequent pregnancies. Thus, the factors that affect wound healing should be evaluated. We aimed to determine whether the morphology of the CS scar in non-pregnant women after one elective CS was affected by the site of the uterine incision, uterine flexion, maternal age, and fetal birth weight. MATERIAL AND METHODS: 208 non-pregnant women were invited for participation in the study, but only 101 of them met inclusion criteria...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28507873/inferior-limb-salvage-by-combined-free-tissue-transfer-and-the-crane-principle-revisited
#15
Alessandro Thione, Pedro C Cavadas
Aggressive treatment of ischemia of the lower extremities has decreased the number of amputations in both diabetic and nondiabetic patients; combined vascular reconstruction and microvascular free-flap transfer has been used to improve distal perfusion and cover large tissue defects caused by the critical limb ischemia during the past 30 years. We present our experience with a 71-year-old diabetic patient who underwent revascularization with a vascular bypass and a simultaneous microvascular flap reconstruction for limb salvage after domestic trauma...
April 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28507848/the-marriage-of-sartorius-and-tensor-fasciae-latae-in-treating-vascular-prosthetic-graft-infections
#16
Simone N Zoepke, Louis de Weerd
BACKGROUND: Vascular prosthetic graft infection in the groin is associated with high morbidity and mortality. This article presents a case series on the use of 2 flaps in the treatment of this condition. METHODS: Five patients, mean age 65 years (range, 49-74 years), with significant comorbidity were treated for an exposed and infected vascular prosthetic graft in the groin with a combination of sartorius muscle (SM) flap and tensor fascia lata (TFL) myocutaneous flap after debridement and start of microbiologic culture-guided antibiotic treatment...
April 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28507845/surgical-factors-associated-with-prolonged-hospitalization-after-reconstruction-for-oncological-spine-surgery
#17
Hannah M Carl, Devin Coon, Nicholas A Calotta, Rachel Pedreira, Justin M Sacks
BACKGROUND: Posterior trunk reconstruction is increasingly possible as a result of advances in spinal instrumentation, reconstructive approaches, and perioperative critical care. Extensive cases often require a muscle flap or complex closure to obliterate dead space. Postsurgical wound complications and subsequent reoperations can lead to neural injury, higher hospital costs, and longer hospitalizations. We aim to identify risk factors that are associated with increased length of stay (LOS) for patients receiving flaps to close a spinal defect...
April 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28505031/povidone-iodine-solutions-inhibit-cell-migration-and-survival-of-osteoblasts-fibroblasts-and-myoblasts
#18
James X Liu, Jordan A Werner, John A Buza, Thorsten Kirsch, Joseph D Zuckerman, Mandeep S Virk
STUDY DESIGN: In vitro laboratory study. OBJECTIVE: The purpose of this study was to identify the effect of dilute povidone-iodine (PVI) solutions on human osteoblast, fibroblast and myoblast cells in vitro. SUMMARY OF BACKGROUND DATA: Dilute PVI wound lavage has been used successfully in spine and joint arthroplasty procedures to prevent post-operative surgical site infection, but their biologic effect on host cells is largely unknown. METHODS: Human primary osteoblasts, fibroblasts, and myoblasts were expanded in cell culture and subjected to various concentrations of PVI (0%, 0...
April 12, 2017: Spine
https://www.readbyqxmd.com/read/28503937/assessment-of-tricalcium-phosphate-collagen-tcp-collagene-nanocomposite-scaffold-compared-with-hydroxyapatite-ha-on-healing-of-segmental-femur-bone-defect-in-rabbits
#19
Mahmoud Mohseni, Alireza Jahandideh, Gholamreza Abedi, Abolfazl Akbarzadeh, Saeed Hesaraki
Bone regeneration is an important objective in clinical practice and has been used for different applications. The aim of this study was to evaluate the effectiveness of nanocomposite tricalcium phosphate (TCP)/collagen scaffolds combined with hydroxyapatite scaffold for bone healing in surgery of femoral defects in rabbits. In this study, 45 mature male New Zealand white rabbits between 6 and 8 months old and weighting between 3 and 3.5 kg were examined. Rabbits were divided into three groups. Surgical procedures were performed after intramuscular injection of Ketamine 10% (ketamine hydrochloride, 50 mg/kg) and Rompun 5% (xylazine, 5 mg/kg)...
May 14, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28503549/learning-from-mother-nature-innovative-tools-to-boost-endogenous-repair-of-critical-or-difficult-to-heal-large-tissue-defects
#20
REVIEW
Ranieri Cancedda, Sveva Bollini, Fiorella Descalzi, Maddalena Mastrogiacomo, Roberta Tasso
For repair of chronic or difficult-to-heal tissue lesions and defects, major constraints exist to a broad application of cell therapy and tissue engineering approaches, i.e., transplantation of "ex vivo" expanded autologous stem/progenitor cells, alone or associated with carrier biomaterials. To enable a large number of patients to benefit, new strategies should be considered. One of the main goals of contemporary regenerative medicine is to develop new regenerative therapies, inspired from Mother Nature. In all injured tissues, when platelets are activated by tissue contact, their released factors promote innate immune cell migration to the wound site...
2017: Frontiers in Bioengineering and Biotechnology
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