The adhesive properties of two bonding systems to tetracycline stained dentin
10.3760/cma.j.issn.1002-0098.2016.01.010
- VernacularTitle:两种粘接剂对四环素牙本质粘接性能的比较研究
- Author:
Hongling LIU
1
;
Kunneng LIANG
;
Lei CHENG
;
Jiyao LI
;
Libang HE
Author Information
1. 四川大学华西口腔医学院口腔疾病研究国家重点实验室
- Keywords:
Tetracycline stained dentin;
Dentin-bonding agents;
Micro-tensile bond strength;
Resin conversion rate
- From:
Chinese Journal of Stomatology
2016;51(1):42-45
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate and compare the bonding properties of Single Bond 2 and SE Bond to tetracycline stained dentin in vitro.Methods Ten extracted tetracycline stained human teeth and ten extracted normal human teeth were collected and the occlusal dentin surfaces of all extracted teeth were exposed.The tetracycline stained teeth and normal teeth were divided into two groups, respectively and randomly, based on the adhesives applied.Total-etch adhesive(Single Bond 2) and self-etch adhesive(SE Bond) were used.After application of the adhesives to the dentin surfaces, composite crowns were built up.After 24 h water storage, the teeth were sectioned longitudinally into sticks(0.9 mm×0.9 mm bonding area) for micro tensile testing or micro Raman spectroscopy detection.Bonding strength(μTBS) and resin conversion rate were analyzed using one-way ANOVA.Results The tetracycline Single Bond 2 group presented lower bonding strength[(16.17±3.16) MPa] than the tetracycline SE Bond group[(25.82± 2.62) MPa], and also demonstrated lower bonding strength than the normal Single Bond 2 group[(29.13± 2.44) MPa] and the normal SE Bond group[(24.29±2.83) MPa](P＜0.05), while there was no statistical differences among the other three groups(P＞0.05).The resin conversion rate of tetracycline Single Bond 2 group[(55±6)％] was significantly lower than the tetracycline SE Bond group[(66±3)％](P＜0.05) and also lower than the normal Single Bond 2 group[(64±5)％] and the normal SE Bond group[(65±4)％](P＜0.05).No statistically significant differences were observed among the other three groups(P＞0.05).Conclusions The bonding strength of total-etch adhesive system to the tetracycline stained dentin was significantly lower than that to the normal dentin.
