Bond Strength of Newer Dentin Bonding Agents in Different Clinical Situations

Abstract

The bond strengths of adhesive systems are affected by the amount of moisture on the bonding surface of the tooth. SUMMARYThis study compared the tensile bond strengths of different adhesive systems to different dentinal substrate conditions. The adhesive systems used were Adper Single Bond 2 total etch, XP Bond total etch, and two all-inone adhesives, Adper Easy One and Xeno V. Ninety-six intact human premolars extracted on periodontal or orthodontic grounds were collected and stored in 0.9% physiologic saline for less than four weeks. Teeth were carefully cleaned to remove the soft tissue remnants. The occlusal surfaces were ground until the level of the dentinoenamel junction, exposing superficial dentin using a low-speed diamond disc. A standard smear layer was produced by wet sanding the dentin surface with 600-grit silicon carbide sandpaper for 40 seconds. The 96 specimens were embedded in autopolymerizing acrylic resin and divided into four groups of 24 each based on the dentin bonding agents used. Each group consisted of 24 specimens, which were further divided into two subgroups of 12 specimens each, moist dentin and dentin air-dried for 10 seconds. The regions of interest for adhesion were demarcated in each sample using adhesive tape, with a 4-mm-diameter hole isolating the peripheral region, and each adhesive system was employed. Four adhesive systems, two total etch and two self-etching adhesive, were applied to different dentinal substrates as per the manufacturers' instructions. Following the adhesive application, the specimens were restored with composite material using a metallic mold measuring 5 mm in diameter and 5 mm in height to keep the material in cylindrical form and were light cured per manufacturers' instructions. After being stored for 24 hours in distilled water at room temperature, the specimens were thermocycled for 550 cycles at temperatures ranging from 58C to 608C with a dwell Mithra N. Hegde, MDS, Senior professor and head of the department,

Influence of salivary contamination on the dentin bond strength of two different seventh generation adhesive systems: In vitro study

“…Hence that the bonds are stable. [ 9 ] Sufficient microporosities are promoted to acquire micromechanical interlocking through hybridization. The conservation of hydroxyapatite inside the submicron hybrid layer possibly serve as a receptor for further chemical bonding.…”

Effectiveness of two universal adhesives using two different bonding approaches

“…Adhesive dentistry is a swiftly developing discipline. 33 New products are introduced in the market at an exceptionally fast rate. 40 Although clinical experiments are considered the best to test the performance of dental restorations, they are unable to identify the exact cause of failure because of the concurrent effect of different factors and different stresses on restorations within the oral environment.…”

“…40 Although clinical experiments are considered the best to test the performance of dental restorations, they are unable to identify the exact cause of failure because of the concurrent effect of different factors and different stresses on restorations within the oral environment. 33 On the other hand, lab testing can assess the effect of a single variable whereas all others are kept constant. 24 The results of our study rejected the first null hypothesis that stated that the type of universal adhesive used would affect the dentin bond strength as, regardless of the bonding approach used and the aging time, there was no statistically significant difference in the dentin μ-TBS means between Adhese® Universal (31.53±3.9 MPa) and Single Bond Universal (30.52±4.39 MPa) adhesives (p= 0.1853).…”

“…The achievement of strong and long-lasting bond between the tooth structure and the subsequent restoratives has always been an ambition for the dental profession. 33,34 More than a few laboratory tests were recommended to test the adhesives' bonding performance; i.e. micro-tensile (μ-TBS) 35 and micro-shear (μ-SBS) 36 bond strength tests.…”

Effect of oxalic acid pre-treatment in restorations of non-carious cervical lesions: A randomized clinical trial

“…Due to an improved ability to diffuse through partially collapsed demineralized dentin, it is claimed to be less technique sensitive. [19] However, in vitro results do not reflect the clinical behavior of the material and clinical studies showed controversial results when XP Bond is used as adhesive system in non-carious cervical lesions. [2021] This way, more clinical evaluations with this adhesive system must be encouraged in order to prove its efficiency.…”