Viswanath Nivedha, Inbaraj Anand Sherwood, Amaechi Bennett Tochukwu, Gandhi Geeth Deepika, Subramani Rathna Piriyanga
Department of Conservative Dentistry and Endodontics, CSI College of Dental Sciences, Madurai, Tamil Nadu, India.
Department of Comprehensive Dentistry, University of Texas Health, San Antonio, TX, USA.
J Conserv Dent. 2020 Sep-Oct;23(5):522-527. doi: 10.4103/JCD.JCD_58_20. Epub 2021 Feb 10.
Cervical lesions requiring adhesive restoration may present with dentin hypersensitivity, but the effect of desensitizer treatment on microtensile bond strength (MBS) is inconclusive.
The aim of the present study was to assess the influence of two types of dentin desensitizing treatment on bond strength to dentin.
Thirty-six extracted human mandibular first premolars were used to obtain superficial buccal cervical dentin. The samples were assigned to two groups (18/group): etch-and-rinse (ERS) (Optibond Solo) and self-etch (Palfique) adhesive systems. Eighteen teeth in each group were randomly assigned to three desensitizer treatments (6/treatment); control (no desensitization), Gluma™ desensitizerand Novamin-containing toothpaste (Sensodyne repair and protect™). Bonded dentin-composite specimens were stored in artificial saliva for 2 weeks prior to scanning electron microscope (SEM) evaluation and MBS testing. Univariate analysis of variance and Tukey tests were performed (α = 0.05) for the data analysis.
The mean MBS with self-etch system (SES) was significantly higher than ERS system, irrespective of the dentin desensitizer regimen. SEM showed no hybrid layer or resin tag formation in the SES group. Tubular occlusion was observed in all specimens treated with desensitizer.
Mild self-etch adhesive can be used on dentin treated with Gluma or bioglass-containing desensitizer without compromising the bond strength.
Dentin desensitizer such as in-office Gluma or at-home Novamin-containing toothpaste could be used without compromising the bond strength of mild self-etch adhesive systems.
需要粘结修复的颈部病变可能伴有牙本质过敏，但脱敏剂治疗对微拉伸粘结强度（MBS）的影响尚无定论。
本研究旨在评估两种牙本质脱敏治疗对牙本质粘结强度的影响。
使用36颗拔除的人下颌第一前磨牙获取颊侧颈部表层牙本质。将样本分为两组（每组18个）：酸蚀冲洗（ERS）（Optibond Solo）和自酸蚀（Palfique）粘结系统。每组18颗牙随机分为三种脱敏剂治疗（每种治疗6颗）；对照组（未脱敏）、Gluma™脱敏剂和含诺瓦敏的牙膏（舒适达修复护理™）。粘结的牙本质-复合树脂标本在扫描电子显微镜（SEM）评估和MBS测试前，在人工唾液中保存2周。对数据分析进行单因素方差分析和Tukey检验（α = 0.05）。
无论牙本质脱敏方案如何，自酸蚀系统（SES）的平均MBS均显著高于ERS系统。SEM显示SES组未形成混合层或树脂突。在用脱敏剂处理的所有标本中均观察到牙本质小管阻塞。
温和的自酸蚀粘结剂可用于经Gluma或含生物玻璃的脱敏剂处理的牙本质，而不影响粘结强度。
可使用诊室用Gluma或家用含诺瓦敏的牙膏等牙本质脱敏剂，而不影响温和自酸蚀粘结系统的粘结强度。
