There were significant different between PMMA group and silicon–gelatum group in high frequency（P<0.05）, silicon–gelatum group was superior to PMMA group.
PMMA组
胶组比较，高频段差异有显著意义（P<0.05），胶组优于PMMA组。
胶There were significant different between PMMA group and silicon–gelatum group in high frequency（P<0.05）, silicon–gelatum group was superior to PMMA group.
PMMA组胶组比较，高频段差异有显著意义（P<0.05），胶组优于PMMA组。
PMMA组
胶组比较，高频段差异有显著意义（P<0.05），胶组优于PMMA组。
There were significant different between PMMA group and silicon–gelatum group in high frequency（P<0.05）, silicon–gelatum group was superior to PMMA group.
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