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Papers of The 1st Japan Scar Workshop |
19. A New Theory for The Effect of Silicone Gel Sheet: Visual
Analysis by A Finite Element Approach
Akaishi S, Ogawa R, Akimoto M, Hyakusoku H, Department of Plastic and
Reconstructive Surgery, Nippon Medical School, Tokyo, Japan
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Even though silicone gel sheet (SGS) had been used to treat hypertrophic
scars (HS) and keloids (K) worldwide, its mechanism of action remains
undetermined. To date, there are various hypotheses on the effect of SGS
on H and K. Although there is no conclusive evidence for any of the
hypotheses, various hypotheses such as "pressure", "hydration and
occlusion", "oxygen tension", "epidermal barrier", "silicone fluid", and
"static-electric field induction" have been proposed. However, of these
hypotheses have been satisfactory to clinicians because SGS has not been
definitely effective for all HS and K. Recently, we clarified visually
that all types of keloids are formed due to stretching tension only with
the use of the finite element method, which is a visual analytical
method used for finding approximate solutions to partial differential
equations as well as integral equations. In this study, the following
became clear. The high tension in stretching keloids is found around the
edge and not the whole keloid. This finding will support the
investigation on the effect of SGS on stretching tension where the
finite element method was used.. In the present study, we could obtain
an acceptable explanation of the effect on HS and K, by a visual
analysis using the finite element approach. This effect is a decrease in
the tension around HS or K brought about by sharing of the tension with
SGS. |
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