Marginal adaptation of three-unit fixed partial dentures constructed from pressed ceramic systems

Stappert, Christian F.J.; Dai, Mei-Lu; Chitmongkolsuk, Somsak; Gerds, Thomas Alexander; Strub, Jörg Rudolf

doi:10.1038/sj.bdj.4811390

Cited by 51 publications

(35 citation statements)

References 29 publications

(52 reference statements)

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“…IPS Empress2 presented the lowest values, around 63 μm [12,13,24] while the marginal misfit of ceramic restorations constructed with IPS Empress 2 and cemented with resin luting cement RelyX ARC showed satisfactory adaptation in this current study. The vertical misfit values of this study (Table 1) are in agreement with the data of previous studies, in accordance to the clinical acceptance [23,25]. At the Wolfart et al [23] study using SEM, the vertical misfits values were from 96 μm to 130 μm to completed crowns, differing with the lowest misfits values found at the present study (Table 1).…”

Section: Discussionsupporting

confidence: 92%

Impact of excess cement removal on vertical misfit and cement line quality in onlays

Soares¹,

Inoue²,

Naves³

et al. 2012

BDS

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Aim: To evaluate the vertical misfit and cement line quality of partial ceramic restorations cemented with resin luting cements using two different methods for cement remove excess. Materials & Methods: Lithium di-silicate restorations were fabricated and cemented at 24 human molars that receive onlay type preparations. The specimens were randomly divided in two groups (n=12): Group 1 (G1) where the cement excess was removed at pre-gel stage and Group 2 (G2) with the cement excess removed after the polymerization. The vertical misfits at cement line were measurements twice, before and after cementation. Epoxy resin replicas of the specimens were obtained and the cement line quality was analyzed with the scanning electron microscope before and after the finishing and polishing procedures and classified as unsatisfactory, acceptable or good conditions. The vertical misfits values were submitted to Student test (p<0.05) and the quality line data were analyzed with Mann-Whitney for independent samples (p<0.05) and Wilcoxon test for paired specimens (p<0.05).Results: The statistical analysis showed that vertical misfit and the cement line quality presented no difference values to G1 and G2. However, finishing and polishing procedures affect positively the cement line quality in the both groups. Conclusion: The excess cement removal methods had no influence on the vertical misfit and cement line quality for the restorations. The finishing and polishing procedures improved the cement line quality in both groups.

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Section: Discussionsupporting

confidence: 92%

Impact of excess cement removal on vertical misfit and cement line quality in onlays

Soares¹,

Inoue²,

Naves³

et al. 2012

BDS

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“…28 The marginal fit values of experimental all-ceramic FPDs ranged between 89 µm and 130 µm in an in vivo study. 29 On the other hand, the findings of an in vitro study revealed mean marginal gap values of Empress 2 FPDs between 58 µm and 68 µm. 30 An explanation for these differences in the literature regarding marginal gaps in all-ceramic crowns might be attributed to many parameters, such as measurement methodology, measuring instruments used, the differences in material properties, sample size and the number of measurements per specimen.…”

Section: Discussionmentioning

confidence: 98%

Influence of Cervical Finish Line Type on the Marginal Adaptation of Zirconia Ceramic Crowns

Çömlekoğlu¹,

Dündar²,

Özcan³

et al. 2009

Operative Dentistry

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Cervical finish line type has an influence on the marginal adaptation of Y-TZP restorations. Both shoulder and mini-chamfer exhibited the least marginal opening values for zirconia crowns and can be recommended for clinical applications. SUMMARYThe current study evaluated the effect of different cervical finish line designs on the marginal adaptation of a zirconia ceramic. Four different marginal finish lines (c: chamfer, mc: mini-chamfer, fe: feather-edge and s: rounded shoulder) were prepared on phantom incisors. Die models for each preparation group (N=28, n=7 per finish line design group) were made of epoxy resin. Y-TZP (ICE Zirkon) frameworks were manufactured by a copy-milling system (Zirconzahn) using prefabricated blanks and tried on the master models for initial adaptation of the framework; they were then sintered, followed by veneering (Zirconzahn). The finished crowns were cemented with a polycarboxylate cement (Poly F) under 300 g load and ultrasonically cleaned. The specimens were sliced and the marginal gap was measured, considering absolute marginal opening (AMO) and marginal opening (MO) for each coping under a stereomicroscope with image processing software (Lucia). The measurements were statistically analyzed using the Kruskal Wallis, Mann Whitney and Wilcoxon Signed Ranks tests at a significance level of α α=0.01. Means of AMO measurement (µm) for the feather-edge finish line (87 ± 10) was significantly lower than that of the chamfer (144 ± 14), shoulder (114 ± 16) and mini-chamfer finish line types (114 ± 11) (p<0.01). Means of MO measurements was the lowest for feather-edge finish line (68 ± 9) (p<0.01) and then, in ascending order, shoulder (95 ± 9), mini-chamfer (97 ± 12) and chamfer (128 ± 10). The cervical finish line type

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“…Artificial aging was previously shown to influence the marginal integrity of all-ceramic FPDs 34. However, Att et al found no significant change in the marginal fit of zirconia FPDs after masticatory and thermal stimulation 29.…”

Section: Discussionmentioning

confidence: 99%

Marginal fit of anterior 3-unit fixed partial zirconia restorations using different CAD/CAM systems

Song¹,

Kwon

Yang

et al. 2013

J Adv Prosthodont

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PURPOSEFew studies have investigated the marginal accuracy of 3-unit zirconia fixed partial dentures (FPDs) fabricated by computer-aided design/computer-aided manufacturing (CAD/CAM) system. The purpose of this study was to compare the marginal fit of zirconia FPDs made using two CAD/CAM systems with that of metal-ceramic FPDs.MATERIALS AND METHODSArtificial resin maxillary central and lateral incisors were prepared for 3-unit FPDs and fixed in yellow stone. This model was duplicated to epoxy resin die. On the resin die, 15 three-unit FPDs were fabricated per group (45 in total): Group A, zirconia 3-unit FPDs made with the Everest system; Group B, zirconia 3-unit FPDs made with the Lava system; and Group C, metal-ceramic 3-unit FPDs. They were cemented to resin dies with resin cement. After removal of pontic, each retainer was separated and observed under a microscope (Presize 440C). Marginal gaps of experimental groups were analyzed using one-way ANOVA and Duncan test.RESULTSMean marginal gaps of 3-unit FPDs were 60.46 µm for the Everest group, 78.71 µm for the Lava group, and 81.32 µm for the metal-ceramic group. The Everest group demonstrated significantly smaller marginal gap than the Lava and the metal-ceramic groups (P<.05). The marginal gap did not significantly differ between the Lava and the metal-ceramic groups (P>.05).CONCLUSIONThe marginal gaps of anterior 3-unit zirconia FPD differed according to CAD/CAM systems, but still fell within clinically acceptable ranges compared with conventional metal-ceramic restoration.

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Marginal adaptation of three-unit fixed partial dentures constructed from pressed ceramic systems

Cited by 51 publications

References 29 publications

Impact of excess cement removal on vertical misfit and cement line quality in onlays

Impact of excess cement removal on vertical misfit and cement line quality in onlays

Influence of Cervical Finish Line Type on the Marginal Adaptation of Zirconia Ceramic Crowns

Marginal fit of anterior 3-unit fixed partial zirconia restorations using different CAD/CAM systems

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