Surface Evaluation of Resilient CAD/CAM ceramics after Contouring and Polishing

Siddanna, Geetha Duddanahalli; Valcanaia, André; Fierro, Pilar Herrera; Neiva, Gisele F.; Fasbinder, Dennis J.

doi:10.1111/jerd.12735

Cited by 7 publications

(4 citation statements)

References 36 publications

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“…This could be attributed to the bidirectional sliding as scratches from one sliding direction were overrun by the abrader in the opposite direction (28) . This recorded Ra value at baseline is comparable to that recorded in a previous study (29) following the same polishing protocol. All recorded Ra values were not above 0.2 μm which is critical for bacterial adhesion with subsequent risk of caries and periodontal inflammation.…”

Section: Discussionsupporting

confidence: 87%

Wear and Surface Roughness of 3D Printed and Milled CAD-CAM Restorative Materials

Arafa

Ghanem

2023

Al-Azhar Journal of Dental Science

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Objective: to assess wear behavior and surface roughness of CAD-CAM restorative materials and their opposing enamel antagonists. Materials and methods: Rectangular-shaped specimens (n=22) (14×12×1.5 mm) were prepared; 3D printed VarseoSmile Crown plus (VS) (n=11) and milled brilliant crios (BC) (n=11). Both groups were finished with composite polishing kit. Wear testing was performed in chewing simulator with twenty-two freshly extracted mandibular premolars antagonists. The wear of specimens and opposing enamel antagonists was calculated by weight loss. The surface roughness (Ra) of the specimens and their opposing enamel antagonist was analyzed by using a digital image analysis software at baseline and after chewing simulation then inspected by SEM. Data were statistically analyzed using Paired t-test, Independent t-test, and Chi square test (p = 0.05). Results: A significant weight loss in tested groups and their opposing enamel antagonists after chewing simulation was noticed by Paired t-test (p < 0.05) where insignificant percentage change of weight between tested groups (p = 0.93) and between their antagonists (p = 0.79) was noticed by Chi square test. Also, A significant difference in Ra value after chewing simulation between tested groups was noticed (p < 0.05) where insignificant percentage change in Ra value between tested groups (p =0.74) and between their antagonists (p = 0.88) was noticed by Chi square test. Conclusions: Based on their properties, each material was affected by chewing simulation at different intensities; The tested CAD-CAM restorative materials and their opposing enamel antagonists showed wear demonstrated by weight loss and difference in surface roughness.

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Section: Discussionsupporting

confidence: 87%

Wear and Surface Roughness of 3D Printed and Milled CAD-CAM Restorative Materials

Arafa

Ghanem

2023

Al-Azhar Journal of Dental Science

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“…Additionally, PIC ceramics with polymer matrix content are predisposed to water absorption and degradation during the thermocycling process [39]. Siddanna [40] reconfirmed the effectiveness of spiral polishers on resin-based ceramics. Rubber cup polishers are not effective due to the limited rounding of protruded filler particles and the abrading of a soft matrix [41].…”

Section: Discussionmentioning

confidence: 91%

Effectiveness of Porcelain Polishing Methods on the Roughness and Color Stability of CAD–CAM Ceramics after Orthodontic Bracket Debonding

Haralur,

Shiban,

Alqahtani

2023

Materials

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Increased utilization of all ceramic restorations for aesthetic consideration in combination with routine adult orthodontic practice has led to numerous clinical challenges. Obtaining adequate bond strength between the orthodontic bracket and all-ceramic restoration and damage to the ceramic surface during the bracket debonding procedure needs to be better understood. This study analyzed the surface texture and color change of glazed and bracket-debonded ceramic CAD–CAM materials and the efficiency of porcelain polishing systems in restoring surface morphology and color. A total of 30 rectangular test specimens from each lithium disilicate CAD (LD-CAD), polymer-infiltrated ceramic (PICN), zirconia-reinforced lithium silicate glass ceramic (ZLS), and 5YTZP zirconia (5YZP) were prepared. The ceramic samples were embedded within acrylic resin, and baseline surface roughness and color were recorded using an optical profilometer and a reflected color spectrophotometer. The porcelain samples were bonded with lower incisor ceramic brackets. The samples were thermocycled 2000 times between 5 and 55 °C. Afterward, the brackets were peeled with bracket-removing pliers. The resin adhesive from the debonded surface was eliminated with tungsten carbide bur, and samples were randomly divided into three subgroups of (n = 10) to be polished with Diapol-twist (DT), a Keramik-Politur 4313B Komet polishing kit (KK), and a Horico diamond polisher (HDP). The polished surface roughness and color were recorded. The data were statistically analyzed using a two-way analysis of variance at p < 0.05. The debonded porcelain surfaces across the groups displayed significantly higher mean surface roughness (Ra) compared to glazed surfaces. The debonded 5YZP showed the least Ra at 0.661 (0.09), while the highest Ra was recorded by PICN at 4.057 (0.82). All of the polishing systems evaluated in the study significantly reduced the surface roughness. However, they were unsuccessful in regaining the surface topography of the glazed surface. The flexible discs (DT) produced the smoothest surface, followed by the diamond-impregnated rubber points (KK). Unpolished porcelain surfaces had a discernable mean color difference from glazed surfaces. Polished surfaces from the different polishing systems among the all-ceramic groups achieved a clinically acceptable mean color difference. Polishing debonded rough porcelain surfaces is imperative, and flexible discs performed better in all of the tested CAD–CAM ceramic materials.

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“…The composite resin, Brilliant Crios, had the lowest surface roughness rating this in line with our study. [ 23 ]…”

Section: Discussionmentioning

confidence: 99%

Clinical performance and wear resistance of milled resin composite material versus direct nanohybrid bulk-fill resin composite in the restoration of endodontically treated posterior teeth over 1 year: Randomized clinical trial

Elhaddad,

Mohsen,

Mohamed

2024

Journal of Conservative Dentistry and Endodontics

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Context: The restorative complexities associated with endodontically treated teeth surpass those encountered with vital ones. The field of adhesive dentistry experienced a significant advancement that led to a shift in treatment approach toward bonded restorations. Aim: The aim of the study was to assess the clinical performance of using indirect Milled composite or direct bulk-fill resin composite restorations for endo-treated teeth, as well as to measure the amount of wear on the occlusal tables of both restorations using a digital scanner. Subjects and Methods: Participants were divided into two groups, where R1 represents the endodontically treated teeth restored with Milled composite, R2 represents the endodontically treated teeth restored with direct bulk-fill composite where 13 patients in each group were treated with a total number of 26 restorations in all patients. Where each restoration was assessed immediately at baseline (T0), 6 months (T6), and 12 months (T12) using the modified United States Public Health Service criteria. Moreover, wear was measured immediately at (T0) and (T12) intraorally and extraorally using intraoral scanners and three-dimensional surface-based superimposition software. Statistical Analysis Used: Chi-squared test, Mann–Whitney U-test, Friedman’s test, Nemenyi post hoc test, Shapiro–Wilk test, paired t-tests, intraclass correlation coefficient. Results: At all intervals, the majority of the cases in both groups had an alpha score. Some cases exhibited bravo scores in both groups at T6 and T12 regarding the color match, marginal adaptation, marginal discoloration, and marginal integrity without statistically significant difference (P > 0.05). Direct nanohybrid bulk-fill resin composite showed a greater amount of wear without a statistically significant difference (P > 0.05). Extraoral measurement was significantly higher than intraoral measurement (P < 0.001). There was no significant reliability/agreement between both methods. Conclusions: Both milled composite and direct bulk-fill resin composite restorations in endodontically treated teeth demonstrated appropriate clinical performance and minimal wear over an 1-year follow-up period.

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Surface Evaluation of Resilient CAD/CAM ceramics after Contouring and Polishing

Cited by 7 publications

References 36 publications

Wear and Surface Roughness of 3D Printed and Milled CAD-CAM Restorative Materials

Wear and Surface Roughness of 3D Printed and Milled CAD-CAM Restorative Materials

Effectiveness of Porcelain Polishing Methods on the Roughness and Color Stability of CAD–CAM Ceramics after Orthodontic Bracket Debonding

Clinical performance and wear resistance of milled resin composite material versus direct nanohybrid bulk-fill resin composite in the restoration of endodontically treated posterior teeth over 1 year: Randomized clinical trial

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