The marginal accuracy of treatment restorations: A comparative analysis

Crispin, Bruce J.; Watson, Janet; Caputo, Angelo A.

doi:10.1016/0022-3913(80)90012-8

Cited by 69 publications

(21 citation statements)

References 11 publications

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“…The provisional crown margins fabricated by the indirect technique are considered to be more accurate than those fabricated by the direct technique. [1213]…”

Section: Discussionmentioning

confidence: 99%

Effect of water temperature on the fit of provisional crown margins during polymerization: An in vitro study

Ramkumar¹,

Sangeetha²,

Kumar

2012

J Pharm Bioall Sci

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Aim:To evaluate the effect of water temperature on the marginal fit of bis-acrylic composite provisional crown during resin polymerization.Materials and Methods:Precisely machined 10 brass master dies were designed to simulate molar teeth. Five brass dies were selected and precisely machined to simulate all ceramic crown preparation. An acrylic jaw replica was made in which brass dies were arranged equidistant from each other. A custom-made metallic tray was fabricated on the acrylic jaw replica to make polyvinyl siloxane impression matrix. Bis-acrylic composite resin provisional crowns were made using polyvinyl siloxane impression matrix. Provisional crowns were polymerized at room temperature (Group I direct technique, on dental stone cast; Group I indirect technique crowns) and at different water temperatures (Group II direct technique crowns). The vertical marginal gap between all the provisional crown margins and the finish line of brass dies was measured using a Research Stereomicroscope System.Results:The results were statistically analyzed using one-way analysis of variance (ANOVA) test and Newman–Keul's test. The results showed that crowns polymerized in 20°C and 30°C water had marginal gap approximately three times smaller than those polymerized in 30°C air, due to the reduced polymerization shrinkage.Conclusion:This study shows that crowns polymerized in 20°C and 30°C water had mean vertical marginal gap approximately three times smaller than those polymerized in 30°C air. It was approximately closer to that of crowns fabricated by indirect technique. Warmer water also supposedly hastens polymerization.

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“…The provisional crown margins fabricated by the indirect technique are considered to be more accurate than those fabricated by the direct technique. [1213]…”

Section: Discussionmentioning

confidence: 99%

Effect of water temperature on the fit of provisional crown margins during polymerization: An in vitro study

Ramkumar¹,

Sangeetha²,

Kumar

2012

J Pharm Bioall Sci

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“…Removal of provisional restorations before significant curing can result in distortion especially in critical areas such as restorations margins [9]. The removal technique in which restorations are left on the bench to complete polymerization also results in increased marginal discrepancies than other techniques that allow curing of the restorations on the prepared natural tooth or implant abutment [19] or the indirect fabrication of provisional restorations [19,20]. Relining techniques with or without venting of the restoration are proven to significantly improve marginal adaptation [17,19,21].…”

Section: Discussionmentioning

confidence: 99%

“…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%

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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“…The indirect method has been associated with superior fit 11,12 and pulp protection but its disadvantage is that an intermediate impression and stone cast are required to fabricate the provisional restoration. On the contrary direct provisional restoration fabrication method efficiently uses time and materials, and also inadequate or absence of in-house lab support has led to its continued use.…”

Section: Introductionmentioning

confidence: 99%

Intrapulpal thermal changes during direct provisionalization using various autopolymerizing resins: Ex-vivo study

Singh¹,

Tripathi

Dhiman

et al. 2015

Medical Journal Armed Forces India

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Provisionalization Autopolymerizing resins Abutment preparationsRemaining dentine thickness a b s t r a c t Background: Resin materials used in the fabrication of direct provisional restoration exhibit an exothermic reaction and the extent of damage may also depend on the remaining dentine thickness. An ex-vivo study was envisaged to compare the time related temperature changes in the pulp chamber during the fabrication of fixed partial denture provisional restorations using direct technique. The effect of differently prepared teeth (with varying remaining dentine thickness) on the above mentioned temperature changes were also evaluated.Methods: Thermal changes were calculated in pulp chamber of three differently prepared tooth having different amount of remaining dentinal thickness (45 samples) and control with no tooth media (15 samples), using three different types of autopolymerizing provisional restorative materials using Cr/Al thermocouple connected to digital thermometer.Results: The data for the mean peak temperature rise was subjected to one way ANOVA analysis for relative comparison among subgroups within each main group and across the main groups. The results showed a statistically significant difference across both the subgroups and the main groups ( p < 0.001). Then Turkey HSD test was applied to determine the significance of statistical difference between the means, within the groups. The differences in temperature rise were statistically significant for the three resins ( p < 0.001).Conclusion: Polymethylmethacrylate (DPI) showed the highest temperature rise value followed by polyethyl methacrylate (Tempron) and Bis-acrylate composite (CoolTemp). The maximum temperature rise was found on molar full veneer preparation followed by molar three quarter preparation and premolar three quarter preparation. Data and results from current study may assist clinicians to select an autopolymerizing provisional restorative resin when employing direct technique of fabricating provisional restorations for a specific tooth preparation which would cause minimal thermal trauma to pulpal tissue. ª

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The marginal accuracy of treatment restorations: A comparative analysis

Cited by 69 publications

References 11 publications

Effect of water temperature on the fit of provisional crown margins during polymerization: An in vitro study

Effect of water temperature on the fit of provisional crown margins during polymerization: An in vitro study

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

Intrapulpal thermal changes during direct provisionalization using various autopolymerizing resins: Ex-vivo study

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