Abstract:

Objective　To investigate the effect of 2 carbonated beverages on the marginal microleakage of porcelain fused to metal crown by immersion test. Methods　From July 2017 to August 2017，15 patients（24 teeth）with premolar extraction for orthodontic treatment were selected from the Outpatient Department of Oral and Maxillofacial Surgery of Affiliated Stomatological Hospital of Fujian Medical University. The 24 extracted human premolars were preserved in chloramine T solution and Co-Cr based porcelain-fused-to-metal（PFM）crowns were cemented with by 3M luting2 cements. They were separated into 3 groups：control，Cola and Sprite. The premolars in control group were immersed in artificial saliva，those in the Cola group were soaked in Coca-Cola®，and those in the Sprite group were immersed in Sprite®. The Cola group and the Sprite group were soaked in the carbonated beverage for 3 times a day，once for 15 minutes，and soaked in artificial saliva for the rest of the time. Microleakage at the dentin-adhesive and adhesive-crown interfaces was determined using methylene blue. Then，the specimens were cut in the buccolingual and mesiodistal direction，and then tested for bond microleakage values using microscope. Results　The statistical analysis of several independent samples of the experiment results showed that the degree of microleakage in the Cola group was greater than that of the Sprite group and the control group，and the difference was statistically significant（P < 0.05）. The microleakage in Sprite group is greater than that in control group，and the difference was statistically significant（P < 0.05）. Conclusion　Microleakage is visible after the bonding interface experiment in each group，and the degree of microleakage in the Cola group is greater than that of the Sprite group and the control group. It is suggested that Coca-Cola® has a strong effect on marginal microleakage of PFM crown compared with Sprite®.

Key words: carbonated beverage, microleakage, porcelain crown

摘要：

目的　通过浸泡实验了解两种碳酸饮料对烤瓷冠边缘微渗漏的影响。方法　选取2017年7—8月于福建医科大学附属口腔医院口腔颌面外科门诊就诊的15例患者因正畸治疗需要拔除的前磨牙24颗。将拔除的前磨牙进行牙体预备，制作钴铬合金烤瓷冠，用树脂改性玻璃离子粘接剂粘固后随机均分为3组，分别为对照组、可乐组和雪碧组，每组8颗。对照组浸泡于人工唾液中，可乐组浸泡于可口可乐碳酸饮料中，雪碧组浸泡于雪碧碳酸饮料中，可乐组和雪碧组浸泡碳酸饮料的方法为每天3次，每次15 min，其余时间浸泡于人工唾液中。各组浸泡14 d后，用2%亚甲基蓝溶液浸泡染色，然后将其自颊舌向及近远中向顺牙体长轴剖开，体视显微镜下观察烤瓷冠边缘染料渗入情况，记录观测结果。结果　可乐组微渗漏程度大于雪碧组与对照组，差异有统计学意义（P < 0.05）。雪碧组微渗漏程度大于对照组，差异有统计学意义（P < 0.05）。结论　各组经14 d浸泡后均发生微渗漏，可乐组的微渗漏程度大于雪碧组与对照组，提示可口可乐碳酸饮料对烤瓷冠边缘微渗漏有较强的影响。

关键词: 碳酸饮料, 微渗漏, 烤瓷冠