检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]重庆第三军医大学大坪医院野战外科研究所口腔科,400042
出 处:《实用口腔医学杂志》2005年第2期242-244,共3页Journal of Practical Stomatology
基 金:重庆市科委基金资助项目(2001 54 21)
摘 要:目的:探讨应用增效剂对脉冲Nd:YAG激光提高人牙齿抗酸性能的影响.方法:50 个离体人牙的釉质、牙本质标本分成加增效剂组和不加增效剂组,2 组又分别分为5 个亚组(即:4 个不同的激光剂量组和空白组)进行处理.再将所有实验牙置于0.1 mol/L人工脱矿液(pH 4.5)37 ℃脱矿48 h,钙离子选择性电极测脱矿液内Ca2+溶出量.结果:激光剂量为20~ 40 J/cm2时,加增效剂组Ca2+溶出量低于未加增效剂组,除牙本质中的20 J/cm2亚组外,2 组间差异具有显著性(P<0.05).当激光剂量继续增大时,加增效剂组Ca2+溶出量与未加增效剂组间差异无显著性(P>0.05).结论:应用增效剂可增强低能量脉冲Nd:YAG激光对牙齿硬组织的作用效果,提高人牙齿的抗酸性能,有助于激光使用的安全性.Objective:To investigate the effect of initiator on pulsed Nd:YAG laser in the acid resistance of human teeth in vitro. Methods:A total of 25 enamel-samples and 25 dentine-samples were divided into laser plus initiator (a layer of Beijing black ink) group and laser only group.Each of the two groups was divided into five subgroups.The samples in the 5 subgroups were irritated by Na:YAG laser with an energy(J/cm2) of 0,20,30,40 and 50 respectively. Then all samples were immersed in 0.1 mol/L lactic acid demineralization solutions(pH 4.5) for 48 h at 37 ℃. The concentration of Ca 2+ (×10 -6 g) dissolved in the solution was measured by the calcium selective electrode. Results:Laser of 20-50 J/cm2 decreased the Ca 2+ concerntration in demineralization solution(P<0.05). The initiator plus laser of 20-40 J/cm2 decreased Ca 2+ release of enamel samples more than the laser only group(P<0.05).However, no significant difference was observed between the initiator plus laser group and the laser only group when laser energy of 50 J/cm2 was applied to the blocks(P>0.05).The initiator plus laser of 30-40 J/cm2 decreased the Ca 2+ release of dentine samples than laser only group (P<0.05).Conclusion:Initiator may enhance the effect of pulsed Nd:YAG laser at low energy-level on acid resistance of human teeth.
关 键 词:增效剂 脉冲ND:YAG激光 抗酸性
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.158