Stereomicroscopic evaluation of marginal fit of E.Max press and E.Max computer-aided design and computer-assisted manufacturing lithium disilicate ceramic crowns: An in vitro study

Elrashid, Afra Hassan; AlKahtani, Amjad Hamod; Alqahtani, Shatha Jarallah; Alajmi, Nouf Bati; Alsultan, Fatimah Hussain

doi:10.4103/jispcd.jispcd_18_19

Cited by 12 publications

(4 citation statements)

References 33 publications

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“…(19) Direct measurement of marginal gap was performed using a digital microscope, as it was presented as the most reliable, commonly used test. (20,21) The marginal gaps of the uncemented vonlays were evaluated on the prepared tooth for standardization & to exclude the effect of cement. (22,23) Results revealed no statistically significant difference, where CD group showed the best marginal adaptation followed by VE then BC.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Marginal Accuracy & Fracture Resistance of Different CAD/CAM Fabricated Monolithic Vonlays

Asaad,

Fahim,

Kotb Salem

2024

Egyptian Dental Journal

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Objective: This research aimed to evaluate & compare marginal accuracy & fracture resistance of three different CAD/CAM fabricated monolithic vonlays. Materials & Methods:A typodont maxillary second premolar was prepared to receive thirty CAD/CAM monolithic vonlays. Three groups of different materials (n=10) were constructed. Group(CD): Zirconia-reinforced lithium silicate (Celtra Duo). Group(VE):Hybrid ceramic(Vita Enamic). Group(BC): Reinforced composite (BRILLIANT Crios). Measurement of vertical marginal gap distance was performed at 16 predetermined points without cementation. Fracture resistance test was conducted for cemented vonlays on their respective epoxy dies.Results: Difference in vertical marginal gap of the three groups was not statistically significant, while fracture resistance showed a significant difference between the three groups. Conclusions:The three tested materials offered vonlays with comparable & clinically acceptable marginal gaps. Concerning the fracture resistance, only Brilliant Crios & Celtra Duo vonlays were proven to have acceptable fracture resistance in premolar area, while Vita Enamic is not recommended as a vonlay in the same area.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Marginal Accuracy & Fracture Resistance of Different CAD/CAM Fabricated Monolithic Vonlays

Asaad,

Fahim,

Kotb Salem

2024

Egyptian Dental Journal

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“…In this investigation, a stereomicroscope was used to assess interior fit. Elrashid et al (2019) claim that it is a straightforward and practical procedure (18) .…”

Section: Discussionmentioning

confidence: 99%

Assessment of Ceramic Repressing Effect on internal fit of Two Different Pressable Ceramic Materials

kamal elbeheiry,

mohsen,

Badr

et al. 2023

Egyptian Dental Journal

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Objective:The aim of this study is to evaluate the effect of ceramic repressing on internal fit of two different pressable ceramic materials.Materials and Methods: Two commercially available glass ceramic materials were used in this study; IPS E-max press (Ivoclar, vivadent) and Celtra press (Dentsply, Sirona). The two materials were used to fabricate veneer samples as which a total of twenty veneers were constructed. The samples for each material(n=10) were randomly divided into two equal groups; Group A: Pressed specimens (n=5) veneer shaped wax patterns were invested and heat-pressed according to the manufacturer's recommendations and Group B: Re-pressed specimens (n=5) the leftover material from 1st pressing was recovered and the buttons were adjusted to fabricate the specimens by repeated heat-pressing using the same procedures as for (A The internal gap distance between the veneers and the resin dies substance ware measured with the stereomicroscope at three preselected locations at 70× magnification. Internal fit adaptation was recorded and mean values for each group determined. Data was statistically analyzed. Results:For IPS E.max or Celtra press; there was no statistically significant difference between mean values of press and repress conditions (P <0.05) between tested groups. It was found that internal gab mean values was recorded for Celtra repress recorded (96.6±6.4) μm which was the highest value which gave poorest fit then E-max repress was recorded (92.6±7.6) μm , Celtra press recorded (91.8±2.8) μm, however E-max press recorded (91.6±5.6) μm which was the lowest mean value for internal fit test. Conclusions:The optimum properties for lithium disilicate Press ceramic materials are obtained with the first pressing. However the microstructure and mechanical characteristics could be impacted by numerous heat repressions, but there would be no statistically significant change in how the internal fit would adjust.

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“…There were a variety of results reported across all the studies; the lowest marginal gap recorded was from Elrashid et al [ 33 ]. A custom-made holder was used with a pin to lock the restoration in place on the dye when measuring the marginal gap, which ensured a very close fit to the corresponding dye.…”

Section: Discussionmentioning

confidence: 99%

A Scoping Review of Marginal and Internal Fit Accuracy of Lithium Disilicate Restorations

et al. 2022

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Objective: To assess and compare the accuracy of the marginal and internal fit of lithium disilicate crowns and onlays fabricated by conventional and digital methods. Sources: An electronic search was carried out on MEDLINE, Embase, Web of Science and Cochrane Library between 2010 and 2021. Study selection: Seventeen studies published between 2014 & 2021 were included, of which thirteen were in vitro laboratory-based studies; three were in vivo clinical studies and one randomised controlled trial. Data: Twelve studies focused on the marginal fit, five focused on the marginal and internal fit. Five studies found that the marginal and internal fit of crowns were more accurate using digital techniques. Five studies noted that there was no difference using either technique and two noted that conventional methods had a more accurate marginal fit. Conclusion: Digital techniques were comparable to conventional methods in terms of accuracy although there was insufficient evidence to indicate that one technique was more accurate than the other with respect to Lithium Disilicate restorations. Clinical significance: Digital impressions are reliable and viable alternatives for clinicians compared to conventional impression techniques when restoring teeth with lithium disilicate restorations.

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Stereomicroscopic evaluation of marginal fit of E.Max press and E.Max computer-aided design and computer-assisted manufacturing lithium disilicate ceramic crowns: An in vitro study

Cited by 12 publications

References 33 publications

Evaluation of Marginal Accuracy & Fracture Resistance of Different CAD/CAM Fabricated Monolithic Vonlays

Evaluation of Marginal Accuracy & Fracture Resistance of Different CAD/CAM Fabricated Monolithic Vonlays

Assessment of Ceramic Repressing Effect on internal fit of Two Different Pressable Ceramic Materials

A Scoping Review of Marginal and Internal Fit Accuracy of Lithium Disilicate Restorations

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