评价两步法自酸蚀粘结剂中的 MDP 和 NaF 对牙釉质微拉伸粘结强度和粘结剂-牙釉质界面形态的影响。

Evaluation of MDP and NaF in Two-step Self-etch Adhesives on Enamel Microshear Bond Strength and Morphology of the Adhesive-Enamel Interface.

出版信息

J Adhes Dent. 2018;20(6):527-534. doi: 10.3290/j.jad.a41632.

DOI:10.3290/j.jad.a41632

Abstract

PURPOSE

To evaluate the roles of MDP and NaF in the bonding resin of a two-step self-etch adhesive (2-SEA) on enamel bonding performance.

MATERIALS AND METHODS

The experimental 2-SEAs were composed of an MDP-containing self-etching primer and four different bonding resins which were MDP- and NaF-free (00), MDP-containing and NaF-free (M0), MDP-free and NaF-containing (0F), and MDP- and NaF-containing (MF) adhesives. Microshear bond strength (µSBS) to enamel and ultimate tensile strength (UTS) of the adhesive resin were determined. The morphological characteristics of the adhesive-enamel interface after acid-base challenge were observed using SEM to evaluate the acid-base resistant zone (ABRZ).

RESULTS

No decrease in μSBS was observed even after thermocycling (TC) in 00, 0F and MF. However, the μSBS of M0 significantly decreased after TC. The UTS of M0 significantly decreased after 1- and 180-day storage in water. SEM observations indicated that ABRZ was present in all groups. However, formation of erosion beneath the ABRZ was observed in M0 and 00, whereas formation of a slope without erosion was observed at the bottom of the ABRZ in MF.

CONCLUSION

In the experimental 2-SEAs, the addition of MDP alone to the adhesive resin did not contribute to an improvement in enamel bonding durability and interfacial morphology, whereas the addition of NaF in the adhesive resin demonstrated an enhancement of the bonding durability and improvement of acid resistance at the bonded interface.

摘要

目的

评估 MDP 和 NaF 在两步自酸蚀粘结剂（2-SEA）粘结树脂中的作用对牙釉质粘结性能的影响。

材料和方法

实验性 2-SEA 由含有 MDP 的自酸蚀底漆和四种不同的粘结树脂组成，分别为不含 MDP 和 NaF（00）、含 MDP 但不含 NaF（M0）、不含 MDP 但含 NaF（0F）和含 MDP 和 NaF（MF）的粘结剂。测量牙釉质的微剪切粘结强度（µSBS）和粘结树脂的极限拉伸强度（UTS）。使用 SEM 观察酸-碱挑战后粘结-牙釉质界面的形态特征，以评估酸-碱抵抗区（ABRZ）。

结果

即使经过热循环（TC）后，00、0F 和 MF 中的 µSBS 也没有下降。然而，M0 的 µSBS 在 TC 后显著降低。在水储存 1 天和 180 天后，M0 的 UTS 显著降低。SEM 观察表明，所有组均存在 ABRZ。然而，在 M0 和 00 中观察到 ABRZ 下形成侵蚀，而在 MF 中观察到底部形成无侵蚀的斜率。