摘要
目的比较渗透树脂和粘接剂在乳磨牙邻面早期龋损中的渗透能力，以期为渗透树脂在乳牙龋中的应用提供依据。方法选取32颗邻面呈白垩色改变的早期龋损离体乳磨牙，垂直于白垩色斑块表面将牙齿切开，在体视显微镜下进行病损组织学分级（c1一CA）：C1：龋损位于釉质外l／2；C2：龋损位于釉质内1／2；C3：龋损位于牙本质外1／2；C4：龋损延伸至牙本质内1／2。随后病损用15％的盐酸酸蚀2min后，分别用渗透树脂（渗透树脂组）和粘接剂（粘接剂组）渗透5min。使用激光扫描共聚焦显微镜在双荧光模式下观察，分别测量病损深度及渗透树脂和粘接剂的渗透深度，并计算渗透百分数。两组间比较使用配对符号秩和检验，同组不同组织学病损分级间比较使用多样本秩和检验。结果所有样本病损组织学分级为c1-c3级，渗透树脂组与粘接剂组c1、c2、c3级的渗透深度分别为240（230，260）和190（150，210）IJ,m、405（300，523）和180（160，200）汕m、590（430，640）和180（160，200）μm，同组织学分级的两组差异有统计学意义（P〈0．05）；渗透树脂组各级渗透深度差异有统计学意义（P〈0．01）。渗透树脂组c1-c3级的渗透百分数分别为[100．O％（96．2％，100．0％）]、[99．1％（95．7％，100．0％）]、[82．0％（81．1％，92．2％）]，粘接剂组c1-c3级的渗透百分数分别为[79．2％（68．4％，87．5％）]、[41．8％（29．1％，74．5％）]、[30．2％（29．2％，39．6％）]，同组织学分级的两组差异有统计学意义（P〈0．05）；渗透树脂组C3级渗透百分数与c1、C2级差异有统计学意义（P〈0．05）。结论渗透树脂能有效地，甚至完全渗入乳磨牙邻面早期非洞龋损中。
Objective To compare the penetration abilities of resin infiltration into proximal lesions in primary molars with those of adhesive in vitro. Methods Thirty-two extracted or exfoliated primary molars showing proximal white spot lesions were selected. Roots of the teeth were removed, and the crowns were cut across the white spot lesions perpendicular to the surface. Cut surfaces were examined （by stereo microscopy） and classified with respect to histological lesion extension （C1-C4）： lesions confined to the outer half on enamel（ C1 ）, lesions confined to the inner half on enamel（ C2）, lesions confined to the outer half on dentin（ C3 ） , lesions extending into the inner half of dentin （CA）. Corresponding lesion halves were etched for 120 s with 15% hydrochloric acid gel and were subsequently treated with either adhesive or resin infiltration. Specimens were observed with laser scanning confocal microscope（LSCM） in dual fluorescence mode. In confocal microscopic images, lesion depth and penetration depth of the resin infiltration or the adhesive in corresponding halves were measured, and penetration percentages were calculated respectively. Differences of the data between two groups were analyzed by Wilcoxon signed rank test. Variations of histological caries extensions were detected with Kruskal-Wallis H test. Results At the same grading level （C1-C3） in histological caries extension, penetration depths of the resin infiltration group and the adhesivegroup were 240（230, 260） ~m vs 190（150, 210） ~m, 405（300, 523） Ixm vs 180（160, 200） ~Lm, and 590（430, 640） Ixm vs 180（ 160, 200） Ixm respectively. There was significant statistical difference in the data between two groups （ P 〈 0. 05 ）. Statistically significant difference in penetration depths of the resin infiltration group （ at C1-C3 ） were Found （ P 〈 0. 01 ）. At the same grading level （ C1-C3 ） in histological caries extension, percentage penetrations of the resin infiltration group and the adhesive group were El00.0% [96.2%, 100.0%）], [99.1% （95.7%, 100.0%）1, [82.0% （81.1%,92.2%）] and E79.2% （68.4%, 87.5% ） 1, [ 41.8% （29. 1%, 74. 5% ） ], E 30. 2% （29. 2%, 39.6% ） ], respectively. The difference between the above data was also significant（ P 〈 0. 05）. Percentage penetrations of the resin infiltration group at C1 and C2 level was higher than those at C3 level（ P 〈 0. 05 ）. Conclusions The resin infiltration is capable of penetrating almost completely into proximal lesions in primary molars.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2012年第11期684-688,共5页
Chinese Journal of Stomatology
基金
基金项目：河北省卫生厅2011年医学科学研究重点课题计划（20110350）
关键词
牙
乳
龋齿
复合树脂类
牙科粘固剂
Tooth, deciduous
Dental caries
Composite resins
Dental cements
