不同类型粘接剂对牙本质粘接强度及耐久性影响的比较研究

目的:比较不同类型粘接剂对牙本质粘接强度及耐久性的影响，从而为临床上选择粘接剂提供参考。方法:选取2019年1月至2020年6月在暨南大学附属深圳市宝安区妇幼保健院口腔科就诊患者50例，其中男25例、女25例，年龄（42.21±8.27）岁。患者因治疗需要拔除50颗完整无龋人离体第三磨牙，采用随机数字表法将其分A、B、...

Effects of different types of adhesives on the strength and durability of dentin bonding

Objective　To compare the effectsof different types of adhesives on the strength and durability of dentinbonding, so as to provide references for clinical selection of adhesives. Methods　Atotal of 50 patients were selected from the Department of Stomatology ofShenzhen Baoan Women's and Children's Hospital Affiliated to Jinan Universityfrom January 2019 to June 2020, including 25 males and 25 females, aged(42.21±8.27) years. Fifty complete caries-free human discrete third molars wereremoved for treatment, which were divide into group A, B, C, D, and E by therandom number table method, 10 tooth in each group. Group A was treated bytotal acid corrosion adhesive, group B was treated by two-step self-acidcorrosion adhesive, group C was treated by one-step acid corrosion adhesive,group D was treated by general adhesive, and group E was treated by total acidcorrosion + general adhesive. Each group shall conduct resin bonding operationstrictly according to the instructions, and 60 dentine-resin strips were cutout in each group, which were further subdivided into two subgroups accordingto the storage time, 30 in each group. After storing in artificial saliva for24 h and 12 months, the specimens were cut and made, and the bonding strengthof each specimen was tested. The fracture mode of the specimens was analyzed bystereomicroscope, and the bonding strength and fracture mode of 5 kinds ofdental adhesives were compared. Univariate ANOVA was used for multiple-groupcomparison of the measurement data, SNK-q test was used for pairwise comparisonbetween groups, paired t test wasused for intra-group comparison, and rank sum test was used for the rankeddata. Results　There was no statistically significant difference in the bondingstrength between group A and group B after 24 h of storage [(30.73±2.56) MPavs. (31.42±9.17) MPa] (P>0.05);the bonding strength of group A and group B were higher than those of group C[(22.22±5.67) MPa], group D [(25.04±1.87) MPa], and group E [(24.54±2.09) MPa](P<0.05); the bonding strength ofgroup D was higher than that of group C (P<0.05).The bonding strength of each group after 12 months of storage was: group B[(30.56±2.54) MPa] >group A [(28.35±3.25) MPa] > group D [(24.91±6.46)MPa] > group E [(20.18±3.08) MPa] > group C [(17.43±1.28) MPa], with astatistically significant difference (P<0.05).The bonding strength of group A, group C, and group E after 12 months ofstorage were higher than those after 24 h of storage, with statisticallysignificant differences (all P<0.05);there was no statistically significant difference in the bonding strength ofgroup B or group D (both P>0.05).After storage for 24 h and 12 months respectively, the number of mixed fractureswas always the largest in each group, and there was no statisticallysignificant difference in the constituent ratio of fracture structure amongeach group (P>0.05). Conclusions　The bonding strength of dentin treated with two-step self-acidcorrosion adhesive and total acid corrosion adhesive are the highest; thebonding strength of one-step self-acid corrosion adhesive is the lowest. Astime goes on, the bonding strength of dentin treated with two-step self-acidcorrosion adhesive is still the highest, and that of dentin treated withone-step self-acid corrosion adhesive decreases most obviously.