The effects of a microlayer of silica on the retention of mandibular complete dentures

Boucher, Louis-Martin; Ellinger, Charles W.; Lutes, Marvin R.; Hickey, Judson C.

doi:10.1016/0022-3913(68)90258-8

Cited by 21 publications

(5 citation statements)

References 3 publications

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“…Hydrophilic surface properties reduce the adherence of hyphal Candida albicans and of bacterial cells . In addition to being hygiene relevant, surface hydrophilicity may play an important role in enhancing denture retention . In the present study, all CAD/CAM denture resin samples, except for WDD and WN u , were statistically significantly more hydrophilic than the heat‐polymerised denture base resins.…”

Section: Discussionmentioning

confidence: 49%

Influence of CAD/CAM fabrication on denture surface properties

Steinmaßl

Dumfahrt

Grunert

et al. 2018

J of Oral Rehabilitation

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Three main properties are responsible for the microbial attractiveness of denture surfaces: roughness, hydrophilicity and free surface energy. This study investigated whether CAD/CAM-fabricated dentures are more favourable for these surface properties than conventionally fabricated dentures. The mucosal surface roughness of 54 standardised study dentures was measured using contact profilometry. The surface hydrophilicity and free surface energy of 70 standardised denture resin specimens were determined by contact angle measurements. Both experimental settings compared AvaDent (AD), Baltic Denture System (BDS), Vita VIONIC (VV), Whole You Nexteeth (WN) and Wieland Digital Dentures (WDD) surfaces with conventionally manufactured denture surfaces (control group). These data were analysed using ANOVA together with Tukey's test or the Games-Howell post hoc test. All CAD/CAM dentures had lower mean surface roughness values than conventional dentures. For AD, VV, WN and WDD, the differences were statistically significant. Vita VIONIC (P < .001), coated WN (P < .001), AD (P = .023) and BDS specimens (P = .027) were significantly more hydrophilic than the control group. All measured surface energies were of similar magnitude (mean values between 31.82 and 33.68 mJ/m ), and only coated WN specimens had a significantly increased mean value (66.62 mJ/m , P < .001). Although most CAD/CAM dentures have smoother and more hydrophilic surfaces than conventional dentures, there is no difference in their free surface energy, except for coated dentures.

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Section: Discussionmentioning

confidence: 49%

Influence of CAD/CAM fabrication on denture surface properties

Steinmaßl

Dumfahrt

Grunert

et al. 2018

J of Oral Rehabilitation

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“…Wettability [19][20][21][22] This refers to the lowering of the energy of a system when a liquid wets a solid surface. Thus, to break such an interface is similar to breaking the adhesion between solids: work needs to be done to create the break and a Fig.…”

Section: Cohesionmentioning

confidence: 99%

The physical mechanisms of complete denture retention

Darvell

Clark

2000

Br Dent J

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The purpose of this article is to assist the practitioner to understand which factors are relevant to complete denture retention in the light of the current understanding of physics and materials science and thus to guide design. Atmospheric pressure, vacuum, adhesion, cohesion, surface tension, viscosity, base adaption, border seal, seating force and muscular control have all been cited at one time or another as major or contributory factors, but usually as an opinion without proper reference to fundamental principles. Although there has been a detailed analysis published, it seems appropriate that a restatement of the points in a collated form be made. In fact, denture retention is a dynamic issue dependent on the control of the flow of interposed fluid and thus its viscosity and film thickness, while the timescale of displacement loading affects the assessment. Surface tension forces at the periphery contribute to retention, but the most important concerns are good base adaptation and border seal. These must be achieved if full advantage is to be taken of the saliva flow-related effects.

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“…Wettability also has a great importance for the retaining of the prosthesis in the oral cavity of the patient. The authors of works [26][27][28] suggest that an improvement of the prosthesis retention can be obtained by increasing the wettability of the surface.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Wettability and Surface Free Energy of Ti(C,N) Coatings on Nickel-based Casting Prosthetic Alloys

Banaszek

Klimek

2015

Archives of Foundry Engineering

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The production process of prosthetic restorations runs in two stages. In the first stage, the prosthetic foundation is produced of metal alloys. In the second stage, a facing material is applied on the produced element. In both stages, the wettability is significantly important, as well as the free surface energy relating to it. The quality of the obtained cast depends on the surface phenomena occurring between the metal alloy and the material of which the casting mould is made. The performed examinations also point to a relation between the ceramics joint and the base, depending on the wetting angle. The aim of the presented paper was to examine influence of the composition of a Ti(C,N)-type coating on bases made of the Ni-Cr prosthetic alloy on the wettability and the surface free energy. The test material were disks made of the Ni-Cr alloy with the diameter of 8 mm. The disks were divided into five groups, which were covered with Ti(C,N) coatings, with different amounts of C and N in the layer. In order to determine the surface free energy (γs), the wetting angle was measured. Two measure liquids were applied: distilled water and diiodomethane. The obtained results of the measurements of the water-wetting angles suggest that together with the increase of the ratio of nitrogen to carbon in the Ti(C,N) coating, the surface hydrophobicity increases as well. In all the samples, one can see a large difference between the energy values of the polar and the apolar components. The high values of the polar components and the low values of the apolar ones make it possible to conclude that these surfaces exhibit a greater affinity to the polar groups than to the apolar ones. On the basis of the analysis of the surface free energy, one can state that covering the alloy with Ti(C,N)-type coatings should not decrease the adhesion of the ceramics to the alloy, whereas TiC coatings should lead to the latter’s improvement. Due to their hydrophilicity, TiC coatings should decrease the adhesion of bacteria to the surface and hinder the formation of a bacterial biofilm.

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The effects of a microlayer of silica on the retention of mandibular complete dentures

Cited by 21 publications

References 3 publications

Influence of CAD/CAM fabrication on denture surface properties

Influence of CAD/CAM fabrication on denture surface properties

The physical mechanisms of complete denture retention

Wettability and Surface Free Energy of Ti(C,N) Coatings on Nickel-based Casting Prosthetic Alloys

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