<abstract xmlns="http://www.w3.org/1999/xhtml"><bold>Objective</bold>: The aim of this study was to evaluate and quantify functional and structural nerve regeneration after reconstruction using either direct suture or silicon graft.<bold>Methods</bold>: Thirty-two adult Wistar Albino rats were divided in two equal groups. The left sciatic nerve was cross-sectioned and reconstructed using either direct suture (DS group) or a silicone graft (SG group). At 4, 6, 8 and 10 weeks two rats were randomly chosen from each group for in vivo measurement of nerve electric conductivity and subsequently sacrificed together with other two rats from the same group for in vitro 1H NMR relaxometry measurements. The T2 distributions were assigned to 1H located in different pools corresponding to the nerve structure.<bold>Results</bold>: In the injured nerve we observed a significant increase in the stimulation threshold and a decrease in conduction velocity when compared with the healthy nerve in both groups. Whereas the conduction velocity increased progressively from 4 to 10 weeks in the DS group, the opposite evolution was observed in the SG group. In both groups, the first two peaks corresponding to water bound to collagen and epineurium had smaller transverse relaxation times in the injured nerves, while there was no change in the peaks corresponding to perineurium and free water between healthy and injured nerves.<bold>Conclusions</bold>: Significant differences were observed between direct suture and nerve graft reconstructions from both a functional and structural point of view. In the case of direct suture reconstruction, the nerve was functionally healed at 10 weeks after injury.</abstract>

Objective: The aim of this study was to evaluate and quantify functional and structural nerve regeneration after reconstruction using either direct suture or silicon graft.Methods: Thirty-two adult Wistar Albino rats were divided in two equal groups. The left sciatic nerve was cross-sectioned and reconstructed using either direct suture (DS group) or a silicone graft (SG group). At 4, 6, 8 and 10 weeks two rats were randomly chosen from each group for in vivo measurement of nerve electric conductivity and subsequently sacrificed together with other two rats from the same group for in vitro 1H NMR relaxometry measurements. The T2 distributions were assigned to 1H located in different pools corresponding to the nerve structure.Results: In the injured nerve we observed a significant increase in the stimulation threshold and a decrease in conduction velocity when compared with the healthy nerve in both groups. Whereas the conduction velocity increased progressively from 4 to 10 weeks in the DS group, the opposite evolution was observed in the SG group. In both groups, the first two peaks corresponding to water bound to collagen and epineurium had smaller transverse relaxation times in the injured nerves, while there was no change in the peaks corresponding to perineurium and free water between healthy and injured nerves.Conclusions: Significant differences were observed between direct suture and nerve graft reconstructions from both a functional and structural point of view. In the case of direct suture reconstruction, the nerve was functionally healed at 10 weeks after injury.

Sciatic Nerve Regeneration in Wistar Albino Rats Evaluated by <italic>in vivo</italic> Conductivity and <italic>in vitro</italic> 1H NMR Relaxometry

Spitalul Clinic Judetean De Urgenta Oradea

University of Medicine and Pharmacy Tîrgu Mures

Acta Marisiensis - Seria Medica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Sciatic Nerve Regeneration in Wistar Albino Rats Evaluated by  Conductivity and  1H NMR Relaxometry

Objective: The aim of this study was to evaluate and quantify functional and structural nerve regeneration after reconstruction using either direct suture or...

Sciatic Nerve Regeneration in Wistar Albino Rats Evaluated by in vivo Conductivity and in vitro 1H NMR Relaxometry

Published Online: Mar 27, 2018

Page range: 22 - 27

Received: Nov 08, 2017

Accepted: Jan 15, 2018

DOI: https://doi.org/10.2478/amma-2018-0004

Keywords
rat's sciatic nerve regeneration, electric conductivity, 1H NMR relaxometry

© 2018 Anamaria Victoria Bumbu et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Sciatic Nerve Regeneration in Wistar Albino Rats Evaluated by in vivo Conductivity and in vitro 1H NMR Relaxometry

Published Online: Mar 27, 2018

Page range: 22 - 27

Received: Nov 08, 2017

Accepted: Jan 15, 2018

DOI: https://doi.org/10.2478/amma-2018-0004

Keywordsrat's sciatic nerve regeneration, electric conductivity, 1H NMR relaxometry

© 2018 Anamaria Victoria Bumbu et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
rat's sciatic nerve regeneration, electric conductivity, 1H NMR relaxometry