The effect of milling and postmilling procedures on the surface roughness of<scp>CAD/CAM</scp>materials

Mota, Eduardo Gonçalves; Smidt, Laura Nunes; Fracasso, Lisiane Martins; Burnett, Luiz Henrique; Spohr, Ana Maria

doi:10.1111/jerd.12326

Cited by 55 publications

(49 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[23][24][25] Some studies reported that polishing was as effective as glazing in reducing surface roughness of ground ceramics. [26][27][28][29][30][31][32][33] Similar findings were reported for monolithic and opaque zirconia. 34,35 On the other hand, other studies reported that glazing is the best procedure for obtaining surface smoothness.…”

supporting

confidence: 60%

“…Porcelain polishing reduced surface flaws and defects and enhanced the resistance of the restoration to fracture . Some studies reported that polishing was as effective as glazing in reducing surface roughness of ground ceramics . Similar findings were reported for monolithic and opaque zirconia .…”

supporting

confidence: 56%

“…The layered digital group (TriLuxe forte) demonstrated the highest Ra and Rz values at the glazed stage. Surface roughness has been reported to be affected by milling and post‐milling procedures . Therefore, a thicker glaze layer would probably provide a smoother surface for machined feldspathic ceramics.…”

Section: Discussionmentioning

confidence: 99%

“…Surface roughness has been reported to be affected by milling and post-milling procedures. 33 Therefore, a thicker glaze layer would probably provide a smoother surface for machined feldspathic ceramics. Nevertheless, the longevity of the glaze is not well established when restorations are in function; further investigation is needed in this area.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Surface Roughness of Monolithic and Layered Zirconia Restorations at Different Stages of Finishing and Polishing: An In Vitro Study

Hamad

Al‐Addous

Al‐Wahadni

et al. 2019

Journal of Prosthodontics

View full text Add to dashboard Cite

Purpose To evaluate surface roughness and topography of different zirconia‐based restorations at various steps of finishing and polishing. Materials and Methods Seventy‐five zirconia discs were fabricated and divided into 3 layered and 2 monolithic groups: layered conventional (VM9; Vita), layered pressed (PM9; Vita), layered digital (TriLuxe Forte; Vita), opaque monolithic (Ceramill Zi; Amann Girrbach), and translucent monolithic (Zolid FX; Amann Girrbach). Surface roughness testing (Ra, Rz) and scanning electron microscopy were performed at the glazed, unglazed, finished, polished, super‐polished, and super‐polished with diamond paste steps. One‐way ANOVA and Tukey tests were used for statistical analysis. Results There were significant differences in all groups among the different steps (p < 0.001, F = 77.67 for layered conventional; p < 0.001, F = 133.90 for layered pressed; p < 0.001, F = 47.94 for layered digital; p < 0.001, F = 48.05 for zirconia opaque; p < 0.001, F = 43.91 for zirconia translucent). For the layered groups, glazed stage was significantly different from all other steps (p < 0.001). For the layered conventional and digital groups, polishing using diamond paste was not significantly different from the polished and super‐polished steps (p = 0.448, p = 0.153), while for the layered pressed group, polishing using diamond paste was not significantly different from the super polished step (p = 0.815). For monolithic groups, there were no significant differences between the polished and super‐polished steps (p = 0.957 for zirconia opaque, p = 1.00 for zirconia translucent). Both the diamond paste and super‐polished steps showed no significant differences (p = 0.620, p = 0.550) from the glazed surface in the opaque zirconia group. Conclusions Surface roughness of monolithic and layered zirconia was improved by polishing; however, only opaque zirconia reached the level of surface roughness of the glazed stage. Type of buildup affected the surface roughness of adjusted ceramics, with monolithic zirconia showing lower surface roughness than layered zirconia. Polishing with diamond paste provided no significant improvement in the surface roughness of monolithic or layered zirconia.

show abstract

supporting

confidence: 60%

supporting

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Surface Roughness of Monolithic and Layered Zirconia Restorations at Different Stages of Finishing and Polishing: An In Vitro Study

Hamad

Al‐Addous

Al‐Wahadni

et al. 2019

Journal of Prosthodontics

View full text Add to dashboard Cite

show abstract

“…Previous studies 19,20 reported that glaze treatment is preferred to surface polishing for LDS restorations. Based on these studies, 26,27 the effects of different glazing treatments on the optical properties and roughness of an LDS material were investigated in this study.…”

Section: Discussionmentioning

confidence: 99%

Effects of Different Glaze Treatments on the Optical Properties and Roughness of Lithium Disilicate Ceramics

Subaşı

Alp

2019

Cumhuriyet Dental Journal

View full text Add to dashboard Cite

Objectives: To investigate effects of different glaze procedures on the colour, translucency, and roughness of lithium disilicate (LDS) ceramics after short-term ageing. Materials and Methods: Eighteen LDS specimens (thickness: 0.6 mm) were divided into three groups (paste (EP), spray (ES), and powder-liquid glaze (EL)) based on the type of glaze treatment (n=6). After glaze firings, specimens were thermally aged (5000 cycles). Before and after thermocycling, the colour, translucency, and roughness values of the specimens were measured. Before and after thermocycling, the translucency and roughness data were analysed using a one-way analysis of variance (ANOVA) and compared using a Wilcoxon signedrank test. Changes in colour, translucency, and roughness data were analysed using one-way ANOVA, and the correlations between them were analysed using Spearman's correlation analysis (p=.05). Results: The EL group showed the highest and clinically unacceptable colour change value (p≤.005). Before and after ageing, the EL group exhibited higher translucency than the other groups (p<.001), and the EL and EP groups exhibited higher roughness values than the ES group (p≤.001). Wilcoxon signed-rank test results showed that although a significant difference between the initial and final translucency values was observed in the EL group (p=.028), no significant differences between the initial and final roughness values were observed in each group. Only in the EL group, a significant correlation was found between the colour and translucency change values (r=.943, p=.005). Conclusions: After short-term ageing, based on the evaluation of the LDS ceramics' colour and translucency changes, ES and EP treatments are preferable for glazing. When dentists select a material (EP, EL, ES) for glazing LDS ceramics, they should consider the effects of this material on the optical properties and surface roughness of LDS ceramics.

show abstract

Guided protocol for indirect fabrication of a custom provisional restoration prior to immediate implant surgery in the esthetic zone

Vargas

Dimalanta

2023

Clin Adv Periodontics

View full text Add to dashboard Cite

BackgroundDelivery of a high‐quality provisional restoration at a maxillary anterior immediate implant site enhances patient‐centered outcomes and promotes development of favorable hard and soft tissue architecture. The purpose of this report is to present a protocol relying upon compatible guided surgery and laboratory systems for fabrication of a custom provisional crown prior to immediate implant surgery in the esthetic zone.Methods and ResultsA female patient, aged 33 years, presented to the Army Postgraduate Dental School, Fort Gordon, Georgia, with an unfavorable prognosis for tooth #9. The patient elected extraction with immediate implant placement. Prior to the surgery, we utilized a cone‐beam computed tomography volume, stone models, implant planning software, and an implant indexing system to fabricate a custom provisional crown. Following extraction of tooth #9 and immediate implant placement, the provisional crown exhibited excellent fit and finish, requiring virtually no chairside adjustment. We noted minimal change in baseline mucosal contours throughout the healing phase.ConclusionThe clinical/restorative protocol described in this report assured accurate three‐dimensional implant positioning and permitted indirect fabrication of a high‐quality custom provisional crown in advance of surgery. The laboratory workflow—which dental technicians/auxiliaries can master—has the potential to shorten surgery, enhance treatment outcomes, and increase patient satisfaction.Key pointsWhy is this case new information? This report provides a stepwise workflow guiding indirect fabrication of a custom provisional crown prior to immediate implant placement. What are the keys to successful management of this case? The described technique requires compatible laboratory and guided surgery systems to assure that the restoration accounts for the three‐dimensional position and timing of the implant. What are the primary limitations to success in this case? Dental technicians/auxiliaries can master this protocol and independently produce high‐quality provisional implant restorations under supervision, potentially enhancing practice efficiency. However, practitioners should provide adequate staff training to optimize reliability and quality.

show abstract

The effect of milling and postmilling procedures on the surface roughness ofCAD/CAMmaterials

Abstract: All hard-milling CAD/CAM materials, that is, fully sintered, should be only hand polished. The glaze step can be suppressed resulting in time saving. However, the glaze step in soft-milling lithium disilicate is imperative.

Cited by 55 publications

References 23 publications

Surface Roughness of Monolithic and Layered Zirconia Restorations at Different Stages of Finishing and Polishing: An In Vitro Study

Surface Roughness of Monolithic and Layered Zirconia Restorations at Different Stages of Finishing and Polishing: An In Vitro Study

Effects of Different Glaze Treatments on the Optical Properties and Roughness of Lithium Disilicate Ceramics

Guided protocol for indirect fabrication of a custom provisional restoration prior to immediate implant surgery in the esthetic zone

Contact Info

Product

Resources

About