Effect of desensitizing agents on the microtensile bond strength of two‐step etch‐and‐rinse adhesives to dentin

Abstract

Desensitizers can be used to control postoperative sensitivity in adhesive restorations. The aim of this study was to evaluate the effect of desensitizing agents on the bond strength of two-step etch-and-rinse adhesive systems to dentin. Forty-two human molars were sectioned to obtain 3-mm-thick dentin discs. The discs were divided into three groups (n = 14 in each) - no-treatment control group (CT), and oxalic acid [BisBlock (BB)] and calcium phosphate [Desensibilize Nano-P (NP)] desensitizers - before the application of two adhesive systems [Adper Single Bond Plus (SB) and One-Step Plus (OSP)]. A nanoparticle composite resin was used to create a 3-mm-thick build-up. The specimens were stored in distilled water for 24 h before a microtensile bond-strength test was performed. The failure modes were determined using a stereomicroscope at 100 × magnification. Specimens were sectioned perpendicular to the interface for scanning electron microscopy analyses. The CT-SB group exhibited the highest bond strength, differing significantly from BB-SB and BB-OSP groups. Mixed failures were prevalent for all groups. Scanning electron microscopy revealed a continuous hybrid layer and resin tags in all groups. Dentin bond strength of etch-and-rinse adhesive systems was reduced by an oxalic acid desensitizer but was not affected by a calcium phosphate-containing desensitizer.

Interfacial fracture toughness of self‐adhesive and conventional flowable composites to dentin using different dentin pretreatments

“…Furthermore, Cortiano et al. showed that OX reduced bond strength when used with the etch‐and‐rinse adhesive, but did not have any effect on SP . However, Sailer et al.…”

Influence of desensitizers agents on the dentin bond strength after one-year water storage

“…Some conditions like periodontal disease, gingival recession, abrasion, caries, and the development of non-carious cervical lesions may result in exposed dentin 4,5 . Dentin hypersensitivity arises from the application of an exogenous stimulus (chemical, mechanical, evaporative or thermal) on the exposed dentin surface 1,2,6,7 .…”

“…The desensitizing agents could reduce the dentin hypersensibility using two mechanisms: by the depolarization of nerve fibers with an immediate effect and by the gradual occlusion of the tubules reducing the pain after several applications 7 . In recent years, desensitizers have been used in combination with adhesive systems in most adhesive restorative procedures.…”

Hassasiyet Giderici Diş Macunlarının Farklı Restoratif Materyallerin Kron ve Kök Dentinine Bağlanma Kuvveti Üzerine Etkisi

“…2,5,6 Bu gibi durumlarda diğer tedavi yöntemleri nedeniyle tıkanan dentin tübülleri, kompozit rezinlerin dentine bağlanma kuvvetini düşürebilmektedir. [7][8][9] Bu araştırmanın amacı, iki farklı hassasiyet giderici diş macununun, kompozit rezin ve cam iyonomer restoratif materyallerin kron ve kök dentinine makaslama bağlanma dayanımı (MBD) üzerine etkilerini değerlendirmektir.…”