Handchirurgie, Mikrochirurgie, plastische Chirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft für Handchirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft für Mikrochirurgie der Peripheren Nerven und Gefässe : Organ der Vereinigung der Deutschen Plastischen Chirurgen
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In critical size bone defects resulting from failed fracture healing or pseudarthrosis surgery is usually required. In this context, autologous bone grafts and callus distraction represent the gold standard, while sometimes even vascularised bone transfer is mandatory including microsurgical techniques. The availability of donor sites for such procedures is limited and the resulting morbidity significant. ⋯ In addition, they may act as a delivery vehicle for growth factors, antibiotics or cells. Their main limitation has been the lack of an intrinsic blood supply, limiting the potential for transplantation. This review provides an overview of matrices, cells and other therapeutic substances in the field of bone tissue engineering.
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Handchir Mikrochir Plast Chir · Aug 2010
Case Reports[Treatment of painful neuromas via end-to-side neurorraphy].
Management of the painful neuroma has been subject to controversy since the earliest descriptions of this disabling problem. Today, treatment is limited to resection of the neuroma and implantation of the nerve in a muscle at a location where it is safe from irritation and trauma. This however is not attainable in many cases and it is our clinical experience, that nerves without a target remain a source of constant discomfort and pain. Recently we reported of the feasibility of neuroma prevention through end-to-side neurorraphy into adjacent sensory and/or motor nerves to provide a target for axons deprived of their endorgan. Here we report of our first clinical experience with this method in sixteen patients with longstanding upper and lower extremity neuromas. ⋯ Previous experimental work and present clinical results suggest that axons of a severed peripheral nerve that are provided with a pathway and target through an end-to-side coaptation will either be pruned or establish some type of end-organ contact so that a neuroma can be prevented without inducing sensory or motor dysfunctions in the recipient nerve.
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Adipose-derived stem cells (ASCs) can be isolated from human adipose tissue with the exceptional potential for differentiation into mature adipocytes. Utilization of this system is very promising in developing improved techniques to repair soft tissue defects. Current reconstructive procedures, especially after trauma and oncological surgery, transfer autologous soft tissue grafts having limitations. ⋯ This review will discuss the relevant properties of human adult adipose-derived stem cells for the regeneration of adipose tissue. Discussion will focus on the biology of ASCs, cell delivery vehicles/scaffolds useful in applying ASCs as a therapy, and suitable IN VIVO animal models for studying adipose tissue engineering. Also included is a description of the current clinical studies with ASCs in Europe and Asia.
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Knowledge about the pathophysiology underlying the complex regional pain syndrome (CRPS) has increased over the last years. Classically, CRPS has been considered to be mainly driven by sympathetic dysfunction with sympathetically maintained pain being its major pathogenetic mechanism. Currently, the disease is understood as result of a complex interplay between altered somatosensory, motor, autonomic and inflammatory systems. ⋯ These pathophysiological ideas do not exclude each other. In fact they complement one another. The variety of the involved systems may explain the versatile clinical picture of CRPS.
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The main symptoms of excruciating pain, trophic and inflammatory changes, as well as functional impairment of limbs are the hallmark of the complex regional pain syndrome (CRPS). While functional impairments have to be treated by physical and occupational therapy, the former three symptoms are amendable to drug treatment: antidepressants, antiepileptic drugs and opioids are the most important drug classes for alleviating neuropathic pain whereas acute nociceptive pain may be positively influenced by non-steroidal anti-inflammatory drugs and steroids. ⋯ The use of sympatholytic agents beyond locoregional anesthesia techniques (which are covered elsewhere in this issue) is not unequivocal. In general, the evidence level for treatment strategies specifically for the complex regional pain syndrome is very poor; most recommendations and algorithms rely on results derived from studies testing drugs against other conditions where chronic (neuropathic) pain is prevalent, like diabetic polyneuropathy or postherpetic neuralgia, or medications are used on the basis of pathomechanistic considerations.