The effects of cross-linking agent and surfactant on the tear strength of novel vinyl polysiloxane impression materials

Din, Shahab Ud; Parker, Sandra; Braden, M.; Patel, Mukesh R.

doi:10.1016/j.dental.2018.09.010

Cited by 8 publications

(6 citation statements)

References 29 publications

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“…Dental impressions should resist tensile tearing stresses upon removal from the mouth and upon cast separation from the set impression [ 43 ]. The clinical tear performance of a material relies on complex interactions between the fillers and the polymer, thickness of the material, presence of internal voids, surface defects, and the removal rate.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the properties of a new super quick-setting (2 min) polyether impression material

Singer

Keilig

Fichte³

et al. 2023

Clin Oral Invest

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Objectives Although a new super-quick setting polyether impression material has been commercially recently introduced, its properties have not been yet reported. Thus, it was the aim of this study to assess the dimensional stability, tear strength, and elastic recovery of the new material and to compare it with another commonly used polyether and polyvinyl siloxane. Materials and methods A new super-quick set polyether, a regular set polyether and a polyvinylsiloxane (PVS) impression material have been used in the study. Dimensional changes were measured using a modified mold as per ISO 4823:2000 after 1 h and 7 days. Tear strength was evaluated by subjecting specimens to tension until failure with a crosshead speed of 250 mm/min. Elastic recovery was measured by deforming specimens using a materials testing machine to a height of 16 mm (20% strain). The change in length (ΔL) was measured afterwards and elastic recovery was calculated in percentages. Results Dimensional changes of the super quick and regular set polyether were comparable in both the vertical and horizontal dimensions after 24 h and 7 days. All the tested materials showed dimensional change values far below the maximum accepted ISO requirement (1.5%). The super quick setting polyether showed significantly improved tear strength (4.9 N/mm) in comparison to the regular set polyether (3.5 N/mm) and similar to PVS (5.2 N/mm). The elastic recovery of PVS (99.6%) was the highest among all the groups. Conclusions and clinical relevance The newly available super-fast set polyether offers a great potential for a reduced chair side time and comfort for both, the patient and the dentist. Super quick polyether showed as well improved tear strength, which is considered one of the shortcomings of the regular set polyether. In addition, the new polyether was as accurate as the regular set polyether and with good elastic recovery.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the properties of a new super quick-setting (2 min) polyether impression material

Singer

Keilig

Fichte³

et al. 2023

Clin Oral Invest

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“…Ud Din et al noted that the novel surfactant Rhodasurf CET-2 in experimental VPS (Exp-III and IV), appeared to be an effective surfactant, compared with Igepal CO-530 that was used in Aq M, since low contact angles were retained after immersion disinfection [18]. Also, the tear strength and %elongation-at-break of experimental formulations increased with the inclusion of the novel surfactant [39]. Since the surfactant was a mixture of ethoxylated cetyl and ethoxylated oleyl alcohols, it was thus concluded that the oleyl part (which contains double bonds) may have bonded chemically, or by molecular entanglement/high Van der Waals forces, within the polymer matrix.…”

Section: Solubilitymentioning

confidence: 99%

“…The ingredients used for the preparation of two hydrophobic (Exp-I and II) and three hydrophilic (Exp-III, IV and V) VPS experimental materials are shown in Table 1, while the amounts can be found in [39,40].…”

Section: Experimental (Exp) Materialsmentioning

confidence: 99%

“…Five Exp compositions (Exp-I, II, III, IV and V) were prepared as described in [39,40]. All components were weighed on a four-figure balance (Mettler, Toledo Ltd, Model AG204, UK).…”

Section: Preparation Of Experimental Materials (Exp) Vps Impression M...mentioning

confidence: 99%

“…Both TFDMSOS and non-ionic surfactant, Rhodasurf CET-2, (ethoxylated cetyl-oleyl alcohol)(Fig 1b) were incorporated in Exp-III, IV and V (at 2, 2.5 and 3 wt%)). The same catalyst paste was used for experimental formulations III, IV and V [39,40]. To match the delivery of commercial VPS impression materials, all experimental pastes (base and catalyst) were dispensed separately in a double barrel cartridge.…”

Section: Preparation Of Experimental Materials (Exp) Vps Impression M...mentioning

confidence: 99%

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Improved water absorption behaviour of experimental hydrophilic vinyl polysiloxane (VPS) impression materials incorporating a crosslinking agent and a novel surfactant

et al. 2021

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Comparison of the Hardness of Novel Experimental Vinyl Poly Siloxane (VPS) Impression Materials with Commercially Available Ones

Din

Chaudhary

Ahmed

et al. 2022

BioMed Research International

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Purpose. To determine the hardness and Young’s moduli of both commercial and experimental vinyl poly siloxane (VPS). Methods. The purpose of this study was to develop a medium-bodied experimental (Exp-I, II, III, IV, and V) VPS impression materials and to analyse their effects on hardness and Young’s modulus and compare them with three commercial VPS materials (Aquasil, Elite, and Extrude) using Shore A hardness tester. Measurements were recorded after 1, 24, 72, and 168 hours of mixing. The results were analysed with one-way ANOVA and post hoc Tukey’s test using the SPSS PASW statistical 22 software. Results. Commercial and experimental vinyl polysiloxane exhibited higher Shore A hardness values with time (i.e., 1 hour after mixing, 24 hours after mixing, 72 hours after mixing, and 1 week after mixing). All Comml and Exp VPS demonstrated a significant increase (ANOVA, p < 0.05 ) in hardness at increasing time points. Generally, all commercial VPS exhibited significantly higher values for Shore A hardness compared to all Exp formulations. For commercial products, Elt M presented significantly highest values at all-time points followed by Aq M then Extr M. Exp-I was significantly harder than all other Exp VPS at all-time points. Young’s modulus values were directly related to Shore A hardness; materials with higher Shore A hardness values had higher Young’s moduli. Conclusion. Continued polymerisation of elastomeric impression materials results in increased hardness over time. Hardness, Young’s moduli, and rigidity of the set commercial and experimental VPS materials were within the required limits. Shore A hardness and Young’s moduli were directly proportional to each other, and commercial and experimental materials had enough rigidity to contain the stone during pouring.

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The effects of cross-linking agent and surfactant on the tear strength of novel vinyl polysiloxane impression materials

Cited by 8 publications

References 29 publications

Evaluation of the properties of a new super quick-setting (2 min) polyether impression material

Evaluation of the properties of a new super quick-setting (2 min) polyether impression material

Improved water absorption behaviour of experimental hydrophilic vinyl polysiloxane (VPS) impression materials incorporating a crosslinking agent and a novel surfactant

Comparison of the Hardness of Novel Experimental Vinyl Poly Siloxane (VPS) Impression Materials with Commercially Available Ones

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