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End-to-end and end-to-side neurorrhaphy between thick donor nerves and thin recipient nerves:an axon regeneration study in a rat model

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Neural Regeneration Research 2018年第4期13卷 699-703页

作者： Tohru Tateshita Kazuki Ueda Akiyoshi Kajikawa Department of Plastic and Reconstructive Surgery St.Marianna Medical University Department of Plastic and Reconstructive Surgery Fukushima Medical University

During nerve reconstruction,nerves of different thicknesses are often sutured together using end-to-side neurorrhaphy and end-to-end neurorrhaphy *** this study,the effect of the type of neurorrhaphy on the number and diameter of regenerated axon fibers was studied in a rat facial nerve repair *** inflow-type end-to-side and end-to-end neurorrhaphy model with nerve stumps of different thicknesses（2：1 diameter ratio） was created in the facial nerve of 14 adult male Sprague-Dawley *** 6 and 12 weeks,nerve regeneration was evaluated in the rats using the following outcomes：total number of myelinated axons,average minor axis diameter of the myelinated axons in the central and peripheral sections,and axon regeneration ***-to-end neurorrhaphy resulted in a significantly greater number of regenerated myelinated axons and rate of regeneration after 6 weeks than end-to-side neurorrhaphy;however,no such differences were observed at 12 *** the regenerated axons were thicker at 12 weeks than at 6 weeks,no significant differences in axon fiber thickness were detected between end-to-end and end-toside ***,end-to-end neurorrhaphy resulted in greater numbers of regenerated axons and increased axon regeneration rate during the early postoperative *** rapid reinnervation is one of the most important factors influencing the restoration of target muscle function,we conclude that end-to-end neurorrhaphy is desirable when suturing thick nerves to thin nerves.

关键词： epineural window transplantation nerve reconstruction suturing facial nerve repair axonal repair neurosurgery peripheral nerve neural regeneration

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