Does immediate dentin sealing influence the polymerization of impression materials?

Ghiggi, Paula Cristine; Steiger, A.; Marcondes, Maurem Leitão; Mota, Eduardo Gonçalves; Burnett, Luiz Henrique; Spohr, Ana Maria

doi:10.4103/1305-7456.137650

Cited by 19 publications

(38 citation statements)

References 17 publications

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“…veneers led to the proposal for posterior "occlusal veneers", which are extra-coronal restorations requiring a simpler and more intuitive preparation driven by interocclusal clearance and anatomical consideration. 10 Development of stronger materials such as lithium disilicate ceramics, hybrid ceramics and the CAD/CAM technology, [11][12][13][14][15] together with the innovative adhesive bonding protocols such as immediate dentin sealing, [16][17][18][19][20] have encouraged the introduction of bonded occlusal veneers as a conservative alternative to traditional onlays and complete coverage crowns for the treatment of severe erosion. 10,15 Federlin et al 21 and Manhart et al, 22 advocated the choice of ceramics as an enamel replacement and relied mainly on their strength and thickness, together with the effective bonding to the underlying prepared tooth structure.…”

Section: Introductionmentioning

confidence: 99%

Fracture Resistance of A Newly Proposed Occlusal Veneer Design Using Two Different CAD/CAM Ceramic Materials

Halim

2018

Egyptian Dental Journal

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Statement of the Problem:Management of severe occlusal erosive lesions constitutes a challenging therapeutic approach to the restorative dentist. Bonded occlusal veneers have been introduced as a conservative solution to traditional onlays or complete coverage crowns. Still, there is lack of information and conflict in the data concerning the mechanical performance of the occlusal veneer materials and designs.Purpose: The purpose of this in vitro investigation was to evaluate and compare the fracture resistance and failure mode of a newly proposed occlusal veneer design constructed of zirconia reinforced lithium silicate and hybrid ceramic materials with the conventional design restored with the same tested materials. Materials and Methods:Two mandibular first molars of a typodont were chosen to perform the master preparations; one for the conventional planar occlusal veneer design, and the second for the proposed modified design which consisted of occlusal veneer preparation with circumferential chamfer finish line and two shallow proximal slots. Ten elastomeric impressions were taken for each design using the putty and light polysiloxane addition silicone impression material. The twenty impressions were poured using type IV dental stone to produce twenty stone casts, ten for each design. Each group of stone casts was subdivided randomly into two equal subgroups according to the ceramic material to be tested; the zirconia reinforced lithium silicate "Celtra Duo" and the hybrid resin nano ceramic "Lava Ultimate". All the occlusal veneers were fabricated using the CAD/CAM Cerec InLab SW 4.2.5 System. The veneers were then checked on both the stone casts and the master preparation on the typodont for perfect seating, after the Celtra veneers were crystallized and glazed and the Lava veneers being subjected to finishing and polishing. The preparations were duplicated to obtain twenty epoxy casts over which the occlusal veneers were adhesively cemented using a standard bonding protocol. The samples were then subjected to thermal cycling program. All the samples were individually mounted on the Instron testing machine with a loadcell of 5 KN and fracture test was done by compressive mode of load applied occlusally using a metallic rod with spherical tip (5.6 mm diameter) at cross-head speed of 1mm/min. The load required to fracture was recorded in Newton and tabulated to be statistically analyzed. The fractured specimens were examined to detect the mode of failure. (2900)Carl Hany Halim E.D.

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Section: Introductionmentioning

confidence: 99%

Fracture Resistance of A Newly Proposed Occlusal Veneer Design Using Two Different CAD/CAM Ceramic Materials

Halim

2018

Egyptian Dental Journal

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“…This might affect the adhesive properties of the adhesives and resins. For this reason, a different approach that foresees the sealing of the tubules immediately after the preparation should provide positive benefits, as already indicated in the literature [17][18][19]22].…”

Section: Discussionmentioning

confidence: 97%

“…Some studies have shown that the use of the IDS techniques can preserve the freshly cut dentinal tubules. In the same way, however, it was hypothesized that the same impression material can interact negatively on the adhesive layer applied before the impression, as recommended in the IDS protocol [19,22,23]. In a recent study in 2019, Sinjari et al [23] demonstrated how an adequate surface cleaning protocol can reset the interactions with the impression material.…”

Section: Discussionmentioning

confidence: 99%

“…Some studies have shown how this negative interaction can be reduced [18,22,23], such as with the use of glycerin jelly during the final light-curing polymerization (the air blocking protocol) [24]. Furthermore, a recent study showed that a good surface cleaning protocol can even reset the interaction with the impression material, to ensure its complete polymerization [23].…”

Section: Introductionmentioning

confidence: 99%

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Penetration of Different Impression Materials into Exposed Dentinal Tubules during the Impression Procedure

et al. 2020

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Adhesive restorations have been shown to guarantee excellent performance and longevity, although this comes with some disadvantages. Among these, the vulnerability of dentine to different agents has been widely evaluated. The aim of this study was to evaluate the possible penetration of impression materials into freshly cut dentine. Dentine from 27 teeth was impressed with polyether (Impregum Penta L) (nine teeth) and with polyvinyl siloxane (Aquasil Ultra LV) (nine teeth). The surface of nine teeth after the impressions were used as the control. Specifically, the extroflections caused by the imprinting of the dentinal tubules on the impression material, the so-called impression tags, were measured. Furthermore, the presence of the material inside the tubules was examined. Scanning electron microscopy analysis showed material tags for all of the experimental groups. The mean lengths (±SD) were 22.6 (±11.0) µm for polyether, 21.8 (±12.8) µm for polyvinyl siloxane and 11.3 (±7.0) µm for the tooth control, with mean diameters (±SD) of 2.8 (±0.5), 2.4 (±0.7) and 3.1 (±0.7) µm, respectively. Fractal analysis showed fractal dimensions of 1.78 (±0.03), 1.77 (±0.03) and 1.71 (±0.03), respectively. These data demonstrated that the impression materials can remain inside the dentinal tubules, which can adversely affect the adhesive procedures.

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“…With the exception of a singlevisit treatment, the use of temporary sealing materials are mandatory. In addition, the unpolymerized airinhibited layer limited the polymerization reaction of impression materials 26) . However, intraoral digital impression of single-visit treatment does not contact with the resin coating layer.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of dentin bond strength of resin cement using new resin coating materials

et al. 2019

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The purpose of this study was to investigate combinations of resin coating materials with a dual-cure resin cement for indirect restorations by evaluating microtensile bond strengths (μTBS). Dentin surfaces of human molars were bonded with either a direct or an indirect resin composite with/without the resin coating technique. For the resin coating material, Clearfil SE Bond 2 and either one of Clearfil Protect Liner F, Clearfil Majesty LV, Panavia V5 or an experimental light-cure coating material were used. For the dual-cure resin cement, either Panavia V5 or Panavia F2.0 were used with Panavia V5 Tooth Primer or ED Primer II. Resin coating does not always contribute to the enhancement of μTBS. The highest μTBS was obtained with the resin coating combination of Clearfil SE Bond 2 and Panavia V5, and cementation with Panavia F2.0, which was identical to that of the direct resin composite bonded with Clearfil SE Bond 2.

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Does immediate dentin sealing influence the polymerization of impression materials?

Cited by 19 publications

References 17 publications

Fracture Resistance of A Newly Proposed Occlusal Veneer Design Using Two Different CAD/CAM Ceramic Materials

Fracture Resistance of A Newly Proposed Occlusal Veneer Design Using Two Different CAD/CAM Ceramic Materials

Penetration of Different Impression Materials into Exposed Dentinal Tubules during the Impression Procedure

Enhancement of dentin bond strength of resin cement using new resin coating materials

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