Comparative in vitro evaluation of two provisional restorative materials

Young, Henry; Smith, C. T.; Morton, Dean

doi:10.1067/mpr.2001.112797

Cited by 110 publications

(88 citation statements)

References 13 publications

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“…3 Recently, composites have gained in popularity for making provisional restorations, because of their ease of manipulation, reportedly low polymerization shrinkage, minimum exothermal reactions and lack of an objectionable odor. [4][5] Most of these materials use bis-acryl resin, a hydrophobic material that is similar to bis-GMA, and they are mixed with an inorganic filler to reinforce their physical properties. Although research has shown that bis-acryl resin composites provide several advantages compared to PMMA as provisional restoration materials, some authors reported that these materials are problematic regarding repair.…”

Section: Introductionmentioning

confidence: 99%

Shear Bond Strength of Provisional Restoration Materials Repaired with Light-cured Resins

Chen¹,

Lai²,

Chou³

et al. 2008

Operative Dentistry

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SUMMARYThis study evaluated the repair bond strengths of light-cured resins to provisional restoration materials with different chemical compositions and polymerization techniques. Fifty discs (10 mm in diameter and 1.5 mm thick) were fabricated for each provisional resin base material, including a self-cured methacrylate (Alike), selfcured bis-acrylate (Protemp 3 Garant), lightcured bis-acrylate (Revotek LC) and a heat-cured methacrylate (Namilon). All specimens were stored in distilled water at 37°C for seven days before undergoing repair with one of four lightcured resins, including AddOn, Revotek LC, Dyractflow and Unifast LC and a self-cured resin (Alike), according to the manufacturers' instructions, for a total of 200 specimens. After 24 hours of storage in 37°C water, the shear bond strengths were measured with a universal testing machine and fracture surfaces were examined under a stereomicroscope. Two-way ANOVA revealed that provisional resin-base material (p<0.001), repair material (p<0.001) and their interactions (p<0.001) significantly affected the repair strength. Tukey's multiple comparisons showed that the lowest bonding strengths were found in specimens of heat-cured methacrylate resin materials repaired with bis-acryl resins, with their failure modes primarily being of the adhe- Clinical RelevanceSpecific repair resins should be chosen for certain provisional materials, since optimal bond strength can be achieved only when the repair resin has similar chemical components to those of the resin matrix (either methacrylate or bis-acryl) for the provisional restoration.sive type. The highest bond strengths were recorded when the provisional resin-base materials and repairing resins had similar chemical components and the failure modes tended to be of the cohesive type.

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Section: Introductionmentioning

confidence: 99%

Shear Bond Strength of Provisional Restoration Materials Repaired with Light-cured Resins

Chen¹,

Lai²,

Chou³

et al. 2008

Operative Dentistry

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“…A 50-µm-thick polyester film was placed over the thermocouples. To cater to the different resin volumes, a Teflon plate with cavities of 6 mm diameter and of different heights (4,6,8,10, and 12 mm) was prepared and placed over the polyester film. Mold heights and their resultant resin volumes are presented in Table 3.…”

Section: Monomer Conversion Calculationmentioning

confidence: 99%

“…Nonetheless, the direct method remains widely used because of time constraints and inadequate laboratory support 10) . Apart from the fabrication technique of direct method versus indirect method, deficiencies of high exotherm and high shrinkage were alternatively addressed by improving the provisional material, culminating in the introduction of provisional composite resins such as bis-acryl resin 11) .…”

Section: Introductionmentioning

confidence: 99%

Influence of the volumes of bis-acryl and poly(methyl methacrylate) resins on their exothermic behavior during polymerization

Kim

et al. 2011

Dent. Mater. J.

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This study aimed to evaluate the influence of the volumes of a bis-acryl resin (Luxatemp) and a poly(methyl methacrylate) resin (Jet) on their exothermic behaviors during polymerization based on vinyl group conversion. The number of vinyl groups reacted and exotherm were determined based on weight percent of methacrylate groups using FTIR spectroscopy. Temperature changes during polymerization at 23°C were recorded for 20 minutes using a multiple cavity mold overlying a thermocouple. The number of vinyl groups reacted and exotherm of Luxatemp were consistently lower than those of Jet at each resin volume. Mean peak temperature rises of Luxatemp and Jet were in the range of 2.0-6.6°C and 4.2-11.6°C respectively, with Luxatemp and Jet taking 2 and 10 minutes respectively to reach their peak temperatures. As their resin volumes increased, their peak temperatures and total peak areas were also observed to increase significantly (p<0.01).

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“…Numerous studies appear in the dental literature comparing the marginal fit of provisional restorations made from different types of materials [8][9][10]17] and different techniques [18][19][20][21] as well as the effect of environment's temperature [22] and storage conditions [23]. Dental implant companies, on the other hand, have all tried to make the temporization phase of treatment more predictable and many have produced stock templates for their own implant systems.…”

Section: Introductionmentioning

confidence: 99%

“…However, Bis-GMA acryl resin composites have become a popular alternative choice due to their ease of use. Research has shown Bis-GMA acryl resin composite to provide some advantages in physical properties including low polymerization shrinkage [7] and good marginal adaptation [8][9][10] low exothermic reaction [11,12] minimal pupil and soft tissue irritation [13], good surface hardness [14], and increased color stability [2,12].…”

mentioning

confidence: 99%

An Investigation into the Integrity of Fit of Provisional Crowns made over a Dental Implant Analogue Using Two Current Proprietary Provisional Crown Materials Compared to a Proprietary 'Snap On' Provisional Core

Georgakis¹

2015

JDODT

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The aim of this study was to investigate the marginal accuracy of three currently used methods of direct provisional crown construction for the accuracy of marginal fit during in vitro fabrication. Three groups of provisional crowns were investigated using a modified McLean and von Fraunhofer technique. Proprietary provisional crown coping modified to tooth shape with a Bis-acryl temporary material was compared to Bis-GMA and isobutyl methacrylate resin provisional crowns with modified margins using a light cured flowable composite and 'bead on' isobutyl methacrylate respectively. Data was analyzed with the Mann Whitney test (a = 0 .05). Reliability was determined using the Bland Altman test. Bis-GMA acryl resin composite relined with flowable composite produced significantly better fitting restorations compared to the two other groups.

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Comparative in vitro evaluation of two provisional restorative materials

Cited by 110 publications

References 13 publications

Shear Bond Strength of Provisional Restoration Materials Repaired with Light-cured Resins

Shear Bond Strength of Provisional Restoration Materials Repaired with Light-cured Resins

Influence of the volumes of bis-acryl and poly(methyl methacrylate) resins on their exothermic behavior during polymerization

An Investigation into the Integrity of Fit of Provisional Crowns made over a Dental Implant Analogue Using Two Current Proprietary Provisional Crown Materials Compared to a Proprietary 'Snap On' Provisional Core

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