Effect of Immediate Dentin Sealing on Polymerization of Elastomeric Materials: An Ex Vivo Randomized Controlled Trial

Abstract

Statement of problem: Interactions are suspected between resin coating and elastomeric impression material.

Purpose: The purpose of this study was to identify possible interactions between two impression materials and resin-coated tooth surfaces.

Materials and methods: Extracted molars (n = 10) underwent 1 of the 4 procedures: control group (unsealed tooth surface/impression); IDS group (immediate dentin sealing/impression); IDS/AB group (immediate dentin sealing/air blocking/impression); IDS/AB-P group (immediate dentin sealing/air blocking/pumicing/impression). Dentin bonding agents used were Adper single bond 2 and Clearfil SE bond. Impression materials used were Impregum Soft (polyether) and Aquasil (A silicone). A stereomicroscope was used to detect any residual impression material on the bonded tooth surface.

Results: The IDS group showed 100% faulty impressions. Air blocking the resin coating did not completely eliminate the oxygen-inhibited layer of Adper single bond 2. Clearfil SE Bond along with Aquasil generated ideal impressions in group IDS/AB, while all other combinations resulted in faulty impressions. The IDS/AB-P group yielded ideal impressions with Aquasil but generated faulty impressions with Impregum soft in most specimens.

Conclusion: Immediate dentin sealing should be followed by air blocking and pumicing to generate ideal impressions with Aquasil (A silicone). Impregum Soft (polyether) is not recommended in combination with immediate dentin sealing.

How to cite this article: Khakiani MI, Kumar V, et al. Effect of Immediate Dentin Sealing on Polymerization of Elastomeric Materials: An Ex Vivo Randomized Controlled Trial. Int J Clin Pediatr Dent 2019;12(4):288-292.

Keywords: Dentin bonding agent; Elastomers; Immediate dentin sealing; Oxygen inhibition layer.

Fig. 1

Impression of the unsealed tooth surface

Figs 2A and B

Immediate dentin sealing

Fig. 3

IDS followed by ‘air blocking’ using K–Y Jelly

Fig. 4

Pumicing of samples in group IV

Figs 5A and B

Unpolymerized impression material over the entire dentin bonded surface in IDS group (Adper Single Bond 2 with Impregum Soft)

Fig. 6

On the left half of the tooth; IDS/AB group shows a defect-free dentin bonded surface. On the right half of the tooth, IDS group shows unpolymerized impression material (Clearfil SE Bond with Aquasil)

Fig. 7

Unpolymerized impression material over entire dentin bonded surface in IDS/AB group (Clearfil SE Bond with Impregum Soft)

Fig. 8

Defect-free dentin bonded surface in IDS/AB-P group (Single Bond 2 with Aquasil)

Fig. 9

Adhesions and tearing of polyether impression material in IDS/AB-P group (Single Bond 2 with Impregum Soft)

Fig. 10

Adhesions and tearing of polyether impression material in IDS/AB-P group (Clearfil SE Bond with Impregum Soft)