可乐型碳酸饮料对二氧化锆修复体粘结强度影响的研究

目的:研究可乐型碳酸饮料对二氧化锆修复体粘结强度的影响。方法:将45颗离体牙分成3组,A组:3M RelyX luting组,B组:3M ESPE RelyX Veneer组,C组:PULPDENT Embrace组,分别与二氧化锆锆块粘结。固化4 min后将试件浸泡于生理盐水中。在固化后5 min和24 h,每组分别选取5个试件浸泡于可乐中。每次浸泡5 min,2次/d,间隔12 h。其余时间生理盐水保存。每组选取5个试件作为对照组,浸泡于生理盐水中。3个月后进行剪切强度测试和扫描电镜观察。结果:组间粘结强度比较:A组低于B、C组(P<0.05);B组与C组无明显差异。组内粘结强度比较,A组:5 min组低于24 h组低于对照组(P<0.05);B组:5 min组与24 h组无差异性,均低于对照组;C组:5 min组低于对照组,24 h组与对照组无差异性。结论:可乐能明显降低3M RelyX luting的剪切强度,但对3M ESPE RelyX Veneer与PULPDENT Embrace的剪切强度的影响较小。可乐对3M RelyX luting的粘结强度影响随着固化时间的延长逐渐减小;可乐对3M ESPE RelyX Veneer粘结性能有一定的影响;PULPDENT Embrace在固化24 h后受可乐的影响较小。

Effect of Cola Type Carbonated Beverage on Adhesive Strength of ZrO2 Restorations and Tooth

Objective: To investigate the effect of carbonated drinks on the adhesive strength of all-ceramic restorations and tooth. Methods: Forty-five premolars were collected and were divided into 3 groups. Group A was 3M RelyX luting group, Group B was 3M ESPE RelyX Veneer group and Group C was PULPDENT embrace group. The teeth were all bonded to ZrO2 block with different cements respectively. After curing for four minutes, the specimens were soaked into saline. After curing for 5 minutes and 24 hours, five specimens of each group were soaked in cola for five minutes. For the next 3 months, immersed into cola 2 times a day with an interval of 12 hours and the samples were preserved in saline preservation for the rest of the time. In each group, the other five specimens were immersed in physiological saline as control. A shear strength test and SEM observation were performed after three months. Results: The group bond strength of Group A was weaker than those of Group B and Group C (P<0.05). There was no significant difference between Group B and Group C. In Group A, the bonding strength of 5 minutes group was lower than that in the group of 24 hours, and both were lower than that of the control group (P<0.05). In Group B, there was no difference between 5 minutes group and 24 hours group, and both were weaker than that of the control group. In Group C, the bonding strength of 5 minutes group was lower than that of the control group, but there was no difference between 24 hours group and the control group. Conclusion: The strength between the 3M RelyX luting and teeth were reduced when the specimens were immersed into cola, but the shear strength in 3M ESPE RelyX Veneer and PULPDENT Embrace was not significantly influenced by cola. With the extension of curing time, the effect of cola on 3M RelyX luting was gradually decreased. The influence of cola on 3M ESPE RelyX Veneer was limited. The influence of cola on PULPDENT embrace was the lowest after curing for 24 hours.