The evaluation of microleakage and bond strength of a silicone-based resilient liner following denture base surface pretreatment

Saraç, Duygu; Saraç, Y. Şinasi; Basoglu, Tarik; Yapici, Oktay; Yüzbaşıoğlu, Emir

doi:10.1016/j.prosdent.2005.11.012

Cited by 46 publications

(58 citation statements)

References 22 publications

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“…When immersed in MMA solution, a decrease in flexural strength is sometimes observed in PMMA resins; 8 however, this would not be expected in clinical practice since the MMA pretreatment involves only surface application, as was performed in the present study. The use of MMA pretreatment may result in better clinical performance and greater prosthetic survival.…”

Section: Discussionmentioning

confidence: 57%

“…19 In spite of the fact that other surface pretreatments had previously been reported ineffective in improving bond strength during a hard chairside reline using PMMA acrylic resin, 6 we found MMA pretreatment to be effective in increasing the bond strength between silicone-based soft liners and PMMA resin stored in PBS. Considering that there is no chemical interaction between silicone-based liner and PMMA acrylic resin, 8 the increase in bond strength may be due to the ability of MMA to dissolve PMMA surface layer and increase the bonding surface area. 18 For PMMA-based groups there were no significant differences in bond strength due to the presence of biofilm or following resin pretreatment.…”

Section: Discussionmentioning

confidence: 99%

“…25 Several factors are expected to affect the bond strength between soft liners and denture base resins, including aging in water 9,10 and thermocycling. 8,11 This list may now also include biofilm accumulation, the use of a bonding agent, and the composition of the soft liner. Additional studies incorporating longer periods of biofilm accumulation must be conducted with the purpose of assessing material degradation and structural failures under these conditions.…”

Section: Discussionmentioning

confidence: 99%

“…5 In order to prevent these problems, several denture base surface treatments have been proposed to increase the bond strength between these materials. 6 When compared to other denture resin pretreatments, [6][7][8] methyl methacrylate (MMA) surface pretreatment increased tensile bond strength 8 and reduced microleakage between the denture base and silicone-based soft liners. 7 In order to evaluate the durability of bonds between soft liners and pretreated denture resins, previous studies have subjected specimens to distilled water storage, 9 accelerated aging in hot water, 10 or thermocycling procedures 8,11 prior to bond strength testing.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

“…12 The square faces of PMMA bars were either treated with MMA (180 s) or left without surface treatment prior to adhesion of the 2 mm-thick denture liner. 8,13,14 Specimens were stored in 100% relative humidity before testing.…”

Section: Specimen Preparationmentioning

confidence: 99%

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Candida albicans biofilms and MMA surface treatment influence the adhesion of soft denture liners to PMMA resin

et al. 2014

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The effect of Candida albicans biofilms and methyl methacrylate (MMA) pretreatment on the bond strength between soft denture liners and polymethyl methacrylate (PMMA) resin was analyzed. Specimens were prepared and randomly divided with respect to PMMA pretreatment, soft liner type (silicone-based or PMMA-based), and presence or absence of a C. albicans biofilm. Samples were composed of a soft denture liner bonded between two PMMA bars. Specimens (n = 10) were incubated to produce a C. albicans biofilm or stored in sterile PBS for 12 days. The tensile bond strength test was performed and failure type was determined using a stereomicroscope. Surface roughness (SR) and scanning electron microscopy (SEM) analysis were performed on denture liners (n = 8). Highest bond strength was observed in samples containing a silicone-based soft liner and stored in PBS, regardless of pretreatment (p < 0.01). Silicone-based specimens mostly underwent adhesive failures, while samples containing PMMA-based liners predominantly underwent cohesive failures. The silicone-based specimens SR decreased after 12 days of biofilm accumulation or PBS storage, while the SR of PMMAbased soft liners increased (p < 0.01). The PMMA-based soft liners surfaces presented sharp valleys and depressions, while silicone-based specimens surfaces exhibited more gentle features. In vitro exposure to C. albicans biofilms reduced the adhesion of denture liners to PMMA resin, and MMA pretreatment is recommended during relining procedures.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Declaration Of Interestsmentioning

confidence: 99%

Section: Specimen Preparationmentioning

confidence: 99%

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Candida albicans biofilms and MMA surface treatment influence the adhesion of soft denture liners to PMMA resin

et al. 2014

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Effect of Surface Treatment on the Flexural Strength of Denture Base Resin and Tensile Strength of Autopolymerizing Silicone Based Denture Liner Bonded to Denture Base Resin: An In Vitro Study

Gupta

2010

J Indian Prosthodont Soc

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Silicone based denture liners are superior to acrylic based denture liners but it has a problem of failure of adhesion with the denture base. To evaluate the effect on the tensile bond strength of silicone based liner and flexural strength of denture base resin when the latter is treated with different chemical etchants prior to the application of the resilient liner. Rectangular specimens of heat cured PMMA (65 × 10 × 3.3 mm(3)) for flexural strength and (10 × 10 × 40 mm(3)) for tensile strength were fabricated and divided into four subgroups each. One subgroup of each type acted as a control and the rest were subjected to surface treatment with acetone for 30 s, MMA monomer for 180 s, methylene chloride for 15 s, respectively. Silicone based denture liner was processed between 2 PMMA specimens (10 × 10 × 40 mm(3)) in the space provided by a spacer, thermocycled (5(-)55°C) for 500 cycles and then their tensile strength measurements and flexural strength measurements were done. 180 s of MMA monomer treatment was found to be most effective in improving the bonding between the liner and denture base resin as well as producing the lowest decrease in flexural strength of denture base resin. Chemical treatment of denture base resin improves the bond strength of denture liner but it also decreases the flexural strength of denture base. So careful selection of chemical etchant should be done so as to produce minimum decrease in flexural strength of denture base resin.

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Resilient Liners: A Review

Rodrigues

Shenoy

Shetty

2012

J Indian Prosthodont Soc

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Resilient liners when used intelligently are an excellent adjunct in removable prosthodontics. However, currently they have to be best considered as temporary expedients because none of the advocated permanent liners have life expectancy comparable to resin denture base. This article reviews the literature regarding their composition, functions, gelation characteristics, bond strength and influence on denture bases. It also presents their drawbacks and attempts made to extend their longevity. A Medline search was completed for the period from 1986 to 2007, along with a manual search, to identify pertinent English peer-reviewed articles and textbooks.

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The evaluation of microleakage and bond strength of a silicone-based resilient liner following denture base surface pretreatment

Cited by 46 publications

References 22 publications

Candida albicans biofilms and MMA surface treatment influence the adhesion of soft denture liners to PMMA resin

Candida albicans biofilms and MMA surface treatment influence the adhesion of soft denture liners to PMMA resin

Effect of Surface Treatment on the Flexural Strength of Denture Base Resin and Tensile Strength of Autopolymerizing Silicone Based Denture Liner Bonded to Denture Base Resin: An In Vitro Study

Resilient Liners: A Review

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