Evaluation of marginal adaptation of a self-adhering flowable composite resin liner: A scanning electron microscopic study

Abstract

Background:“Self-adhering composite resins,” are claimed to eliminate the need for a separate acid etching and bonding agent application step, thus simplifying the direct restorative procedure, both regarding the technique sensitivity and the duration of treatment.Aim:The aim of this study is to evaluate the marginal adaptation of self-adhering flowable composite (Dyad flow) in comparison to the conventional flowable composite (Tetric N-flow) under scanning electron microscope (SEM).Settings and Design:This in vitro study was conducted on 44 extracted human maxillary premolars.Materials and Methods:Box-only Class II cavities on the distal surface were prepared with the dimensions of 4 mm buccolingual width, 2 mm mesiodistal depth, and gingival margin at the cementoenamel junction. They were divided into two groups of 22 teeth each and were restored accordingly: Group I – Gingival floor lined with Tetric N-Flow and were restored with Tetric N-Ceram; Group II – Gingival floor lined with Dyad flow and were restored with Herculite Precis. After thermal cycling, the sectioned tooth-restoration interfaces were evaluated for the marginal adaptation under SEM at ×200 magnification.Statistical Analysis Used:The resultant data were statistically analyzed by applying Chi-square test, using the SPSS (version 16.0) software.Results and Conclusion:There was no statistically significant difference between the study groups regarding the marginal adaptation. The marginal adaptation of the self-adhering flowable composite when used as a liner in Class II restorations was comparable to that of the conventional flowable composite.

Marginal Adaptation and Depth of Cure of Flowable versus Packable Bulk-fill Restorative Materials: An In Vitro StudyMarginal Adaptation and Depth of Cure of Flowable versus Packable Bulk-fill Restorative Materials: An In Vitro Study

“…Although in vitro testing of restorative materials provides an important initial screening for their properties, the obtained results can not accurately predict the clinical performance of restorations [66]. To mimic the influence of oral environment, the restorations in the present study were subjected to thermal ageing.…”

Clinical Behavior of Self-Adhesive Composite Resin Restorations: Literature Review

“…The review showed that the main self-adhesive flowable resins evaluated were Vertise Flow (Kerr Corporation, Orange, CA, USA) [1,2,[15][16][17][18], and Fusio Dentin Liquid (Pentron Clinical, Orange, CA, USA) [19][20][21], Self-adhesive Bulk Fill Restorative (3M Oral Care, St Paul, MN, USA) [21], Filtek Supreme Ultra Flowable (3M ESPE, USA) [22], and Constic (DMG; Hamburg, Germany) [3].…”

“…This review assessed five distinct commercial brands of self-adhesive flowable composite resins (Table 2). Among the studies included, Vertise Flow resin (Kerr Corporation, Orange, CA, USA) was evaluated in six studies [1,2,[15][16][17][18], while Fusio Dentin Liquid (Pentron Clinical, Orange, CA, USA) was examined in three [19][20][21]. Additionally, one study investigated Selfadhesive Bulk Fill Restorative (3M Oral Care, St Paul, MN, USA) [22], another focused on Filtek Supreme Ultra Flowable (3M ESPE, USA) [23], and Constic (DMG; Hamburg, Germany) was analyzed in a separate study [3].…”

“…In addition, different conventional fluid composite resins were used as a comparison parameters. Two studies evaluated Filtek™Z350-XT Flowable, 3M ESPE, USA (conventional fluid resin, total-etch) [16,18] and Tetric® N-Flow (Ivoclar Vivadent, Delhi, India) (conventional flowable resin, total-etch) [19,20]. Flowable resins, with one evaluation each were Premise Flowable, Kerr, Orange, CA, USA (conventional flowable resin, total-etch) [17], Filtek Z250 (3M ESPE, St. Paul, MN, ABD) (conventional fluid resin, total-etch) [1], Filtek One Bulk Fill (3M Oral Care, St. Paul, MN, USA) [22] (bulk fill resin), Filtek Supreme Ultra (3M ESPE, USA) (conventional resin) [23], Luxa Flow (DMG, Hamburg, Germany) (conventional resin) [15].…”

Adhesion of Flowable Resin Composites in Simulated Wedge-Shaped Cervical Lesions: An In Vitro Pilot Study

“…Supplemental experiments need to be conducted in order to assess the specificities of the adhesion process and to examine the properties of the material structure. Thus, the use of scanning electron microscopy (SEM) would allow for an in-depth examination of the adhesive interface and tooth structures [24,25], whereas a semi-quantitative assessment of the chemical elements of substrates could principally be obtained using energy dispersive X-ray analysis (EDX) [26]. It is worth mentioning that EDX studies have found less application in dentistry [26][27][28], being especially associated with the fields of engineering [29] and chemistry [30].…”