【摘要】：目的比較經(jīng)檸檬酸酸蝕后的釉質(zhì)塊在不同再礦化時(shí)間后,刷牙對(duì)其表面磨損深度的影響。方法 60個(gè)釉質(zhì)塊平均分為A~F共6組,分別安置在10個(gè)志愿者的腭基托上。實(shí)驗(yàn)第1天,志愿者口腔中佩戴腭基托24 h,其后3 d,每天進(jìn)行刷牙實(shí)驗(yàn)2次。步驟如下:首先,用蜂蠟覆蓋F組釉質(zhì)塊,將腭基托置于50 mL檸檬酸溶液中酸蝕2 min,然后取出腭基托,沖洗,并將F組釉質(zhì)塊蜂蠟去除;其他組為酸蝕后經(jīng)過(guò)不同的再礦化時(shí)間后刷牙(A組:0 min;B組:20 min;C組:40 min;D組:60 min;E組:酸蝕并且再礦化,但不刷牙;F組:不酸蝕,再礦化,刷牙)。進(jìn)食及清潔時(shí)取出腭基托,其余時(shí)間均需佩戴腭基托。通過(guò)表面輪廓儀測(cè)量釉質(zhì)塊的磨損深度,并用掃描電子顯微鏡(SEM)觀察其表面形貌。結(jié)果酸蝕后經(jīng)過(guò)不同時(shí)間的再礦化,刷牙對(duì)釉質(zhì)塊表面造成的磨損深度不同,各組間的差異具有統(tǒng)計(jì)學(xué)意義(P0.05)。SEM結(jié)果顯示,釉質(zhì)酸蝕后再礦化時(shí)間越短,刷牙后表面凹陷越大越深越多,表面形態(tài)越粗糙。結(jié)論釉質(zhì)被酸蝕后,在唾液中再礦化時(shí)間增加,立即刷牙會(huì)對(duì)釉質(zhì)表面形成較大的磨損,60 min后再刷牙可以有效減少刷牙對(duì)酸蝕釉質(zhì)的磨損。
[Abstract]:Objective to compare the effect of tooth brushing on the surface wear depth of enamel after citric acid etching. Methods 60 enamel masses were divided into 6 groups and were placed on palatal base of 10 volunteers. On the first day of the experiment, the volunteers wore palatine base in the mouth for 24 hours and then brushed their teeth twice a day for 3 days. The steps are as follows: firstly, the enamel of group F was covered with beeswax, the palatal base was etched in 50 mL citric acid solution for 2 min, then the palatine base was removed and flushed, and the beeswax of group F was removed. The other groups were brushing teeth after different remineralization time after acid etching (group A: 0 min;B: 20 min;C: 40 min;D: 60 min;E: acid etching and re-mineralization, but not brushing; group F: no acid etching, remineralization, brushing). Remove palatal base when eating and cleaning. Wear palatine base for the rest of the time. The wear depth of enamel was measured by surface profilometer and the surface morphology of enamel was observed by scanning electron microscope (SEM). Results after different time of remineralization after acid etching, the wear depth of enamel mass caused by brushing teeth was different, and the difference between each group was statistically significant (P0.05). SEM results showed that the shorter the time of remineralization after enamel etching, the shorter the time of remineralization after etching of enamel, P < 0.05). After brushing, the larger the surface is, the more deep the surface is, and the rougher the surface is. Conclusion when enamel is etched by acid, the time of remineralization in saliva increases, and the enamel surface will be worn by brushing immediately. After 60 min, brushing after brushing can effectively reduce the abrasion of enamel after brushing.
【作者單位】： 鄭州市口腔醫(yī)院兒童口腔科;南昌大學(xué)附屬口腔醫(yī)院口腔預(yù)防科;
【基金】：江西省教育廳課題(14100)~~
【分類號(hào)】：R781.2

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