摘要
目的:评价氨化硝酸银染色对正常及龋损牙本质黏结试样黏结强度的影响。方法:选择30个面龋离体磨牙,去除龋检液染色的龋损组织并磨平牙本质。将牙齿分成3组,分别应用黏结剂Contax(CT)、AdperPrompt(AP)及Prime&BondNT(NT),然后在其上制作复合树脂冠。24h后顺牙齿长轴分别从近远中向及颊舌向片切牙齿,制作截面为1mm2的条状试样,分为龋损牙本质组(CAD)和正常牙本质组(ND),分别浸泡氨化硝酸银(染色组)和浸水(对照组)后测定拉伸黏结强度。结果:染色组黏结强度(MPa)(ND/CAD):CT:28.87±7.76/27.20±6.71,AP:22.93±5.59/20.25±3.51,NT:20.08±3.70/17.99±2.87,对照组黏结强度(MPa)(ND/CAD):CT:27.63±7.31/26.36±8.62,AP:21.62±5.10/21.38±3.96,NT:20.79±3.11/19.02±3.72,各黏结剂染色组与相应的对照组黏结强度无显著差异。结论:硝酸银染色对龋损内层和正常牙本质黏结试样黏结强度无显著影响,龋损内层牙本质的早期黏结强度与正常牙本质无显著差异。
AIM： To evaluate the effect of ammoniacal silver nitrate staining on the bond strengths of dentin bonding specimens. METHODS- 30 extracted human molars with coronal carious lesions invading mid -dentin were ground down until the carious dentin no longer stained with caries detector. The flat surfaces were bonded with either Contax（CT） ,Adper Prompt（AP） or Prime＆Bond NT（NT）. A crown was built up using composite. After storage in water （37℃, 24 h）, teeth were sectioned vertically into matchstick -shaped specimens through the bond interfaces to yield 1 mm^2 test area. Specimens were immersed in water （ water group） or ammoniacal silver nitrate （ silver group） for 8 h, and then were tested in tension. RESULTS： Bond strengths （MPa） （ND/CAD） of silver group： CT： 28.87 ± 7.76/27.20±6.71, AP：22.93±5.59/20.25 ±3.51, NT：20.08±3.70/17.99 ±2.87, water group （MPa） （ND/ CAD） ： CT： 27.63±7.31/26.36±8.62, AP：21.62±5.10/21.38±3.96, NT：20.79±3.11/19.02±3.72, No significant differences （ P 〉 0. 05 ） in bond strengths were found between water and ammoniacal silver nitrate storage groups in three adhesives. CONCLUSION ： Ammoniacal silver nitrate staining has no effect on the bond strength of dentin bonding soecimens.
出处
《牙体牙髓牙周病学杂志》
CAS
2007年第6期351-354,共4页
Chinese Journal of Conservative Dentistry
基金
国家自然科学资金资助项目(30470433)
关键词
黏结
拉伸黏结强度
氨化硝酸银染色
龋损内层牙本质
adhesion
tensile bond strength
ammoniaeal silver nitrate staining
caries- affected dentine
