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- W2012606978 abstract "The aim of this study was to obtain further insights about muscle regeneration processes in free neurovascular flaps. In cases of insufficient functional return of muscle strength, several factors, such as diminished axonal ingrowth, fatty degeneration, or connective tissue proliferation are discussed. In the study, free neurovascular latissimus dorsi (LD) flaps were examined after a regeneration period of 2 to 6 years. Clinical function (M1 to M4) and histopathologic characteristics of the muscle grafts were correlated. The rare instances of secondary procedures, such as tenolysis or scar correction, were used for biopsies of the muscle graft. Free neurovascular LD flaps were examined after a regeneration period between 2 and 6 years. The grafted LD was compared to normal, healthy LD muscle. Normal LD muscle showed a typical homogeneous pattern of types 1 and 2 fibers in a ratio of almost 1:1. No significant differences concerning fiber distribution and fiber diameters in three anatomic areas of the LD (proximal, medial, caudal) could be detected. After regeneration, the authors found the following: type grouping of muscle fiber types, fiber splitting, and groups of hypertrophic and atrophic fibers. Most of the muscle fibers were not reinnervated by axons and were atrophic or degenerated. The essential proliferation of connective and fatty tissue was absent. Normal and hypertrophic fibers were found mainly in the muscle grafts with good clinical results. In muscle grafts with good contraction force (M4), 46 percent of reinnervated muscle fibers were found; M3 contractility was correlated with 31 percent of reinnervated muscle fibers; M2 with 24 percent; and M1 with 21 percent of reinnervated fibers. The force of a free muscle graft seems to depend mainly on the quality of nerve regeneration. Characteristics of the muscle fiber itself were not examined extensively, because the single-fiber contractility of the regenerated fibers was similar to the contractility of normal, healthy fibers." @default.
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- W2012606978 date "2000-10-01" @default.
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- W2012606978 title "Comparison of Clinical Performance, Histology and Single-Fiber Contractility in Free Neurovascular Muscle Flaps" @default.
- W2012606978 doi "https://doi.org/10.1055/s-2000-8390" @default.
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