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中华口腔医学研究杂志(电子版) ›› 2013, Vol. 07 ›› Issue (06) : 441 -446. doi: 10.3877/cma.j.issn.1674-1366.2013.06.002

基础研究

人工龋树脂牙本质粘接界面拟生态矿化的定量评估
麦穗1, 古丽莎1, 亓益品1, 武诗语1, 凌均棨1,()   
  1. 1. 510055 广州,中山大学光华口腔医学院·附属口腔医院,广东省口腔医学重点实验室
  • 收稿日期:2013-06-26 出版日期:2013-12-01
  • 通信作者: 凌均棨
  • 基金资助:
    国家自然科学基金(81100743)广东省研究生创新培养计划项目(sybzzxm201110)广东省自然科学基金(1045100890 1005926)教育部高等学校博士学科点专项科研基金新教师项目(20100171120059)广东省教育厅广东高校优秀青年创新人才培育项目(LYM09009)

Quantitative evaluation of biomimetic remineralization of artificial dentinal caries

Sui MAI1, Li-sha GU1, Yi-pin QI1, Shi-yu WU1, Jun-qi LING1,()   

  1. 1. Guanghua School of Stomatology, Hospital of Stomatology,Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
  • Received:2013-06-26 Published:2013-12-01
  • Corresponding author: Jun-qi LING
引用本文:

麦穗, 古丽莎, 亓益品, 武诗语, 凌均棨. 人工龋树脂牙本质粘接界面拟生态矿化的定量评估[J/OL]. 中华口腔医学研究杂志(电子版), 2013, 07(06): 441-446.

Sui MAI, Li-sha GU, Yi-pin QI, Shi-yu WU, Jun-qi LING. Quantitative evaluation of biomimetic remineralization of artificial dentinal caries[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2013, 07(06): 441-446.

目的

探讨人工龋拟生态再矿化的定量评估方法和效果。

方法

通过脱矿/再矿化液的pH 循环法建立人工龋模型,使用全酸蚀粘接剂Single Bond Plus(SB 组)、One-Step(OS 组)和自酸蚀粘接剂Adper Prompt L-Pop(LP 组)进行树脂粘接,在含聚丙烯酸(PAA)和聚乙烯膦酸(PVPA)的模拟体液/硅酸盐水门汀系统中诱导矿化,采用显微计算机X 线断层摄影术(micro CT)定量评估再矿化效果。

结果

矿化诱导4 个月后SB 组、OS 组和LP 组样本病损深度均有降低, 由矿化前的300 μm 分别减少至47、53 和87 μm,矿化率分别为73.76%、81.39%和74.54%。

结论

micro CT 是定量评估人工龋树脂牙本质粘接界面矿化程度的一种有效方法。 含PAA 和PVPA 的模拟体液/硅酸盐水门汀系统可诱导树脂渗透脱矿牙本质再矿化(P <0.05),且不同的粘接剂对人工龋拟生态再矿化效率无显著性影响。

Objective

To investigate the quantitative evaluation of biomimetic remineralization of artificial dentinal caries.

Methods

Artificial dentin caries lesion was established by pH cycling with demineralization and remineralization fluid. The caries-like dentin was bonded with (1) Single Bond Plus(SB), an etch-and-rinse adhesive using moist bonding; (2) One-Step (OS), an etch-and-rinse adhesive using moist bonding;(3) Adper Prompt L-Pop (LP), a self-etching adhesive. All specimens were remineralized by Portland cement/simulated body fluid remineralization media by incorporating polyacrylic acid and Polyvinyl phosphonic acid as biomimetic analogs of matrix proteins. Lesion depth and integrated mineral loss were quantitatively monitored and evaluated with microcomputed tomography.

Results

After 4 months' remineralization, the depth of lesions of group SB, OS and LP were reduced to 47, 53 and 87 μm, with the remineralization rate of 73.76%, 81.39% and 74.54%. Remineralization was achieved in three groups.

Conclusions

Quantitative evaluation of biomimetic remineralization of artificial dentinal caries with micro CT is feasible; The degree of remineralization of the three groups enhanced significantly with no significant difference.

图1 固化水门汀块水溶液中pH 值 图2 固化水门汀块在水溶液中Ca2+释放浓度
表1 三种粘接剂渗透入人工龋形成的树脂牙本质界面拟生态矿化过程中病损深度和矿物损失量的变化(n=10,
图3 Single Bond 渗透人工龋牙本质粘接样本拟生态矿化过程中 图4 One Step 渗透人工龋牙本质粘接样本拟生态矿化过程中 图5 Adper Prompt L-Pop 渗透人工龋牙本质粘接样本拟生态矿化过程中 注:3A、4A、5A 为基线micro CT 图像;3B、4B、5B 为1 个月micro CT 图像;3C、4C、5C 为2 个月micro CT 图像;3D、4D、5D 为3 个月micro CT 图像;3E、4E、5E 为4 个月micro CT 图像
图6 Single Bond、One Step 和Adper Prompt L-Pop 三种粘接剂渗透入人工龋形成的树脂牙本质界面拟生态矿化过程中病损深度的变化 图7 Single Bond、One Step 和Adper Prompt L-Pop 三种粘接剂渗透入人工龋形成的树脂牙本质界面拟生态矿化过程中相对矿化物损失量 图8 Single Bond、One Step 和Adper Prompt L-Pop 三种粘接剂渗透入人工龋形成的树脂牙本质界面拟生态矿化4 个月的矿化效率
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