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      Dermal Regeneration Template in the Management and Reconstruction of Burn Injuries and Complex Wounds: A Review

      research-article
      , MD, CM, PhD, FRCSC, FACS * , , , MBBCh, MSc, FRCS , , MD, MPH, FACS , , MD § , , MD, PhD, FACS , , PhD , , MD, PhD **
      Plastic and Reconstructive Surgery Global Open
      Lippincott Williams & Wilkins

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          Abstract

          Background:

          Dermal scaffolds have created a paradigm shift for burn and wound management by providing improved healing and less scarring, while improving cosmesis and functionality. Dermal regeneration template (DRT) is a bilayer membrane for dermal regeneration developed by Yannas and Burke in the 1980s. The aim of this review is to summarize clinical evidence for dermal scaffolds focusing on DRT for the management and reconstruction of burn injuries and complex wounds.

          Methods:

          A comprehensive search of PubMed was performed from the start of indexing through November 2022. Articles reporting on DRT use in patients with burns, limb salvage, and wound reconstruction were included with focus on high-level clinical evidence.

          Results:

          DRT has become an established alternative option for the treatment of full-thickness and deep partial-thickness burns, with improved outcomes in areas where cosmesis and functionality are important. In the management of diabetic foot ulcers, use of DRT is associated with high rates of complete wound healing with a low risk of adverse outcomes. DRT has been successfully used in traumatic and surgical wounds, showing particular benefit in deep wounds and in the reconstruction of numerous anatomical sites.

          Conclusions:

          Considerable clinical experience has accrued with the use of DRT beyond its original application for thermal injury. A growing body of evidence from clinical studies reports the successful use of DRT to improve clinical outcomes and quality of life across clinical indications at a number of anatomical sites.

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          Most cited references73

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          Wound tissue can utilize a polymeric template to synthesize a functional extension of skin.

          Prompt and long-term closure of full-thickness skin wounds is guinea pigs and humans is achieved by applying a bilayer polymeric membrane. The membrane comprises a top layer of a silicone elastomer and a bottom layer of a porous cross-linked network of collagen and glycosaminoglycan. The bottom layer can be seeded with a small number of autologous basal cells before grafting. No immunosuppression is used and infection, exudation, and rejection are absent. Host tissue utilizes the sterile membrane as a culture medium to synthesize neoepidermal and neodermal tissue. A functional extension of skin over the entire wound area is formed in about 4 weeks.
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            Successful use of a physiologically acceptable artificial skin in the treatment of extensive burn injury.

            A bilayer artificial skin composed of a temporary Silastic epidermis and a porous collagen-chondroitn 6-sulfate fibrillar dermis, which is not removed, has been used to physiologically close up to 60% of the body surface following prompt excision of burn wounds in ten patients whose total burn size covered 50--95% body surface area (BSA). Following grafting, the dermal portion is populated with fibroblasts and vessels from the wound bed. The anatomic structure of the artificial dermis resembles normal dermis and serves as a template for the synthesis of new connective tissue and the formation of a "neodermis," while it is slowly biodegraded. This artificial skin has physiologically closed excised burn wounds for periods of time up to 46 days before the Silastic epidermis was removed. At the time of election when donor sites are ready for reharvesting, the Silastic epidermis is removed from the vascularized artificial dermis and replaced with 0.004 autoepidermal graft in sheet or meshed form. Clinical and histologic experience in a relatively short follow-up period (2--16 months) indicates that "neodermis" retains some of the anatomic characteristics and behavior of normal dermis, thus promising improvement in the functional and cosmetic results, as well as providing physiologic function as a skin substitute. The artificial skin is easily sterilized and stored at room temperature, capable of large scale production, and immediately available for grafting, indicating its potential for easy and relatively economic use in the burn patient.
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              A clinical trial of Integra Template for diabetic foot ulcer treatment.

              Individuals with diabetes mellitus are at an increased risk of developing a diabetic foot ulcer (DFU). This study evaluated the safety and efficacy of Integra Dermal Regeneration Template (IDRT) for the treatment of nonhealing DFUs. The Foot Ulcer New Dermal Replacement Study was a multicenter, randomized, controlled, parallel group clinical trial conducted under an Investigational Device Exemption. Thirty-two sites enrolled and randomized 307 subjects with at least one DFU. Consented patients were entered into the 14-day run-in phase where they were treated with the standard of care (0.9% sodium chloride gel) plus a secondary dressing and an offloading/protective device. Patients with less than 30% reepithelialization of the study ulcer after the run-in phase were randomized into the treatment phase. The subjects were randomized to the control treatment group (0.9% sodium chloride gel; n = 153) or the active treatment group (IDRT, n = 154). The treatment phase was 16 weeks or until confirmation of complete wound closure (100% reepithelialization of the wound surface), whichever occurred first. Following the treatment phase, all subjects were followed for 12 weeks. Complete DFU closure during the treatment phase was significantly greater with IDRT treatment (51%) than control treatment (32%; p = 0.001) at sixteen weeks. The median time to complete DFU closure was 43 days for IDRT subjects and 78 days for control subjects in wounds that healed. The rate of wound size reduction was 7.2% per week for IDRT subjects vs. 4.8% per week for control subjects (p = 0.012). For the treatment of chronic DFUs, IDRT treatment decreased the time to complete wound closure, increased the rate of wound closure, improved components of quality of life and had less adverse events compared with the standard of care treatment. IDRT could greatly enhance the treatment of nonhealing DFUs.
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                Author and article information

                Journal
                Plast Reconstr Surg Glob Open
                Plast Reconstr Surg Glob Open
                GOX
                Plastic and Reconstructive Surgery Global Open
                Lippincott Williams & Wilkins (Hagerstown, MD )
                2169-7574
                March 2024
                20 March 2024
                : 12
                : 3
                : e5674
                Affiliations
                From [* ]Loma Linda University, Loma Linda, Calif.
                []University of Birmingham, Birmingham, UK
                []University of Pennsylvania, Philadelphia, Pa.
                [§ ]Georgetown University Hospital, Washington D.C.
                []Hamilton Health Sciences, Hamilton, Ontario, Canada and McMaster University, Hamilton, Ontario, Canada
                []Integra LifeSciences Corporation, Princeton, N.J.
                [** ]Brigham and Women’s Hospital, Harvard Medical School, Boston, Mass.
                Author notes
                Subhas Gupta, MD, CM, PhD, FRCSC, FACS, CP 21126, 11175 Campus Street, The Department of Plastic Surgery, Loma Linda UniversitySchool of Medicine, Loma Linda, CA 92354, E-mail: sgupta@ 123456llu.edu
                Article
                00041
                10.1097/GOX.0000000000005674
                10954069
                38510326
                825f2f32-cc7c-4d22-945a-b7f2a000e197
                Copyright © 2024 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.

                This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

                History
                : 8 August 2023
                : 25 January 2024
                Categories
                Reconstructive
                Original Article
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