Erdemir Ali, Ari Hale, Güngüneş Hakan, Belli Sema
Selcuk University Faculty of Dentistry, Department of Endodontics, Konya, Turkey.
J Endod. 2004 Feb;30(2):113-6. doi: 10.1097/00004770-200402000-00013.
Use of resin-based restorative materials recently has become widely accepted for treatment of endodontically treated teeth. However, some solutions routinely used during endodontic treatment procedures may have an effect on bond strengths of adhesive materials to root canal dentin. The purpose of this in vitro study was to evaluate the effect of various medications on microtensile bond strength to root canal dentin. Fourteen extracted human single-rooted teeth were used. The crowns and the pulp tissues were removed. The root canals were then instrumented and widened to the same size. The teeth were randomly divided into seven groups of two teeth each. The root canal dentin walls of the roots were treated with 5% sodium hypochloride (NaOCI), 3% hydrogen peroxide (H2O2), the combination of H2O2 and NaOCl, or 0.2% chlorhexidine gluconate for 60 s; or calcium hydroxide or formocresol for 24 h. The teeth in control group were irrigated with water. The root canals were obturated using C&B Metabond. After 24 h of storage in distilled water, serial 1-mm-thick cross-sections were cut, and approximately 12 samples were obtained from each group. Microtensile bond strengths to root canal dentin were then measured by using an Instron machine. The data were recorded and expressed as MPa. The results indicated that NaOCI, H2O2, or a combination of NaOCl and H2O2 treatment decreased bond strength to root canal dentin significantly (p < 0.05). The teeth treated with chlorhexidine solution showed the highest bond strength values (p < 0.05). In conclusion, chlorhexidine is an appropriate irrigant solution for root canal treatment before adhesive post core applications.
近年来，基于树脂的修复材料在牙髓治疗后的牙齿治疗中已被广泛接受。然而，牙髓治疗过程中常规使用的一些溶液可能会对粘结材料与根管牙本质的粘结强度产生影响。本体外研究的目的是评估各种药物对根管牙本质微拉伸粘结强度的影响。使用了14颗拔除的人单根牙。去除牙冠和牙髓组织。然后对根管进行预备并扩至相同尺寸。将牙齿随机分为七组，每组两颗牙。用5%次氯酸钠（NaOCI）、3%过氧化氢（H2O2）、H2O2和NaOCl的组合或0.2%葡萄糖酸氯己定处理牙根的根管牙本质壁60秒；或用氢氧化钙或甲酚甲醛处理24小时。对照组的牙齿用水冲洗。使用C&B Metabond封闭根管。在蒸馏水中储存24小时后，切成连续的1毫米厚的横截面，每组大约获得12个样本。然后使用Instron机器测量根管牙本质的微拉伸粘结强度。记录数据并以MPa表示。结果表明，NaOCI、H2O2或NaOCl与H2O2的组合处理显著降低了与根管牙本质的粘结强度（p < 0.05）。用氯己定溶液处理的牙齿显示出最高的粘结强度值（p < 0.05）。总之，在粘结桩核应用之前，氯己定是根管治疗的合适冲洗液。
