Susana Maria Salazar Marocho

@umc.edu

Assistant Professor, Department of Biomedical Materials Science
University of Mississippi Medical Center



              

https://researchid.co/ssalazar

RESEARCH INTERESTS

Dental ceramics, fracture mechanics, fatigue, lifetime

36

Scopus Publications

1145

Scholar Citations

15

Scholar h-index

16

Scholar i10-index

Scopus Publications

  • Screening dental implant design parameters for effect on the fatigue limit of reduced-diameter implants
    Megha Satpathy, Matthew Loeb, Rose M. Jose, Matthew J. Sinclair, Yuanyuan Duan, Susana M. Salazar Marocho, Michael D. Roach, and Jason A. Griggs
    Elsevier BV


  • Unraveling the antimicrobial mechanisms and multifunctional performance of boron-doped glass coatings on dental zirconias
    Ana Carolina da Silva, Juliana de Freitas Gouveia Silva, Camila da Silva Rodrigues, Evelyn Luzia de Sousa Santos, Juliana Campos Junqueira, Tiago Moreira Bastos Campos, Gilmar Patrocínio Thim, Kartikeya Singh Jodha, Susana Maria Salazar Marocho, Jason Alan Griggs,et al.
    Elsevier BV

  • Fatigue lifetime of reduced-diameter implants placed in different bone models
    Pedro Henrique Wentz Tretto, Jason Alan Griggs, Kartikeya Singh Jodha, Yuanyuan Duan, Susana María Salazar Marocho, and Alvaro Della Bona
    Elsevier BV

  • Effect of the CAD/CAM Milling Protocol on the Fracture Behavior of Zirconia Monolithic Crowns
    Andressa Restani Oliveira, Natalia Ulmi Ziglioli, Susana M. Salazar Marocho, Julian Satterthwaite, and Marcia Borba
    MDPI AG
    Although advancements in CAD/CAM technology allow for more personalized treatments, it is not clear how modifications in the CAD/CAM milling process could affect the restoration surface conditions and their mechanical behavior. The objective of this study was to evaluate the effect of different CAD/CAM milling protocols on the topography and fracture behavior of zirconia monolithic crowns (3Y-PSZ) subjected to a chewing simulation. Monolithic 3Y-PSZ premolar crowns were milled using three protocols (n = 13) (slow (S), normal (N), and fast (F)). Crowns were cemented on a dentin analog abutment and subjected to mechanical aging (200 N, 2 Hz, 1,500,000 cycles, 37 °C water). Surviving crowns were subjected to compressive load test and analyzed using fractography. Fracture load data were analyzed with two-parameter Weibull analysis. The surface topography of the crowns was examined with a stereomicroscope and a 3D non-contact profiler. All crowns survived the chewing simulation. Crowns milled using the F protocol had the greatest characteristic fracture load, while crowns produced with the S protocol showed high Weibull modulus. Groups N and S had a more uniform surface and detailed occlusal anatomy than group F. The CAD/CAM milling protocol affected the topography and mechanical behavior of 3Y-PSZ monolithic crowns.

  • Fatigue behavior of multilayer ceramic structures in traditional and reverse layering designs
    Lisseth Patricia Claudio Contreras, Camila Silva Rodrigues, Camila Pauleski Zucuni, Luiz Felipe Valandro, Susana Maria Salazar Marocho, and Renata Marques de Melo
    Wiley
    PURPOSE This study evaluated the fatigue failure load (FFL) and the number of cycles for fatigue failure (CFF) of traditional (porcelain layer up) and reversed (zirconia layer up) designs of porcelain-veneered zirconia samples prepared with heat-pressing or file-splitting techniques. MATERIALS AND METHODS Zirconia discs were prepared and veneered with a heat-pressed or machined feldspathic ceramic. The bilayer discs were bonded onto a dentin-analog according to the bilayer technique and sample design: traditional heat-pressing (T-HP), reversed heat-pressing (R-HP), traditional file-splitting with fusion ceramic (T-FC), reversed file-splitting with fusion ceramic R-FC), traditional file-splitting with resin cement (T-RC), and reversed file-splitting with resin cement (R-RC). The fatigue tests were performed using the stepwise approach at 20 Hz, 10,000 cycles/step, step-size of 200N starting at 600N, and proceeding until failure detection or up to 2600 N if enduring. The failure modes (from radial and/or cone cracks) were analyzed in a stereomicroscope. RESULTS The reversed design decreased the FFL and CFF of bilayers prepared with heat-pressing and file-splitting with fusion ceramic. The T-HP and T-FC reached the highest results, which were statistically similar between them. The bilayers prepared by the file-splitting with resin cement (T-RC and R-RC) were similar to the R-FC and R-HP groups regarding FFL and CFF. Almost all reverse layering samples failed by radial cracks. CONCLUSIONS The reverse layering design did not improve the fatigue behavior of porcelain veneered zirconia samples. The three bilayer techniques behaved similarly when used in the reversed design. This article is protected by copyright. All rights reserved.

  • EFFECT OF LOW-POWER LASER IRRADIATION ON THE SHEAR BOND STRENGTH AND THERMAL CHANGES ACROSS DIFFERENT ZIRCONIA THICKNESSES USING DIFFERENT IRRADIATION TIMES
    Jaccare T. Jauregui-Ulloa, Nena W. Hawkins, Seth T. Lirette, Taylor J. Ward, and Susana M. Salazar Marocho
    Quintessence Publishing
    PURPOSE To investigate the effect of irradiation time and zirconia thickness using low power Er,Cr:YSGG laser irradiation (for debonding purposes) on the thermal changes and shear bond strength of resin-bonded 3% mol yttrium oxide stabilized tetragonal zirconia polycrystal (3Y-TZP) specimens. MATERIALS AND METHODS 3Y-TZP slices of 0.5, 2, and 3 mm thick were used. The temperature during laser irradiation using single spot irradiation at different times (30, 60, 90, and 120 s) and line scanning irradiation from one spot tanother at three different distances (2-, 4-, and 6- mm) were recorded. Single spot and line scanning irradiation data were analyzed using three-way ANOVA (α: 0.05) and generalized linear mixed model, respectively. Non-irradiated (control) and irradiated resin-bonded 3Y-TZP specimens were shear tested, and the data were analyzed using two-way ANOVA (α: 0.05). RESULTS Under single spot irradiation, the laser-induced temperature was higher through thin 3Y-TZP at any time compared to thick 3Y-TZP. For the line scanning method, short distances (2 and 4 mm) resulted in a significant increase in temperature in 0.5 mm thick specimens. Laser irradiation significantly decreased the shear bond strength of the 0.5 mm group compared to the non-irradiated group. After irradiation, the bond strength of the 2- and 3-mm thick 3Y-TZP was similar to the non-irradiated group. CONCLUSION The temperature and bond strength of low-power laser irradiated 3Y-TZP specimens was affected by the specimen thickness but not by the irradiation time tested. Low-power laser irradiation is an effective debonding method for thin Y-TZP restorations.

  • Influence of Different Surface Finishing Protocols on the Wear Behavior of Lithium Disilicate Glass-Ceramics
    Katia R. Weber, Megha Satpathy, Susana Salazar Marocho, Jason A. Griggs, and Márcia Borba
    Quintessence Publishing
    PURPOSE This study aims to evaluate the effect of different finishing protocols on the wear behavior of a lithium disilicate glass-ceramic. MATERIAL AND METHODS Specimens were produced from lithium disilicate glass-ceramic prefabricated CAD/CAM blocks and divided into three groups, according to the surface treatment (n = 8): control; polishing; glaze. Ceramic specimens were subjected to wear test using a dual-axis chewing simulator. A 49 N load was applied in the axial direction combined with a lateral movement (1 mm path) using a lithium disilicate glass-ceramic spherical piston for a total of 106 cycles. Qualitative analysis of the wear surface was performed using an optical microscope. Quantitative analysis of surface roughness and volume loss was performed using a confocal microscope and a 3D-image editing software, respectively. Surface roughness and volume loss data were analyzed using Friedman's non-parametric statistical test for repeated measures and the Student-Newman-Keuls test (α = 0.050). RESULTS There were statistical differences for surface roughness and volume loss of lithium disilicate glass-ceramic specimens in the different experimental conditions (P˂0.001). Control and polishing groups showed similar surface roughness and volume loss values for all testing times. Glaze group had greater wear volume after 103, 104 and 105 cycles. After 106 cycles, surface roughness and volume loss were similar among groups. For the piston, surface roughness was similar over time and among groups. CONCLUSIONS A distinct wear behavior was found for glazed glass-ceramic specimens in comparison to control and polished specimens. The end of the simulation, the surface roughness and volume loss was similar for the groups.

  • Functionalized Collagen/Elastin-like Polypeptide Hydrogels for Craniofacial Bone Regeneration
    Pallabi Pal, Michelle A. Tucci, Lir‐Wan Fan, Ratna Bollavarapu, Jonathan W. Lee, Susana M. Salazar Marocho, and Amol V. Janorkar
    Wiley

  • Strength of a Zirconia-Reinforced Glass-Ceramic After Diamond Bur Adjustment
    B. Moura Pereira, A. Restani Oliveira, R. Leal do Prado, A. B. Gomes de Carvalho, R. Marques de Melo, K. Singh Jodha, S. M. Salazar Marocho and G. Ávila Galhano

    INTRODUCTION Adjustments with diamond burs on the ceramic surface can affect its roughness and decrease flexural strength. This study evaluated the effect of polishing or glazing on the surface roughness and biaxial flexural strength of a zirconia-reinforced lithium silicate glass-ceramic upon adjustment with diamond burs. METHODS Seventy disks were prepared according to ISO 6872 and divided into seven groups (n = 10) according to different adjustments and finishing processes. Surface roughness was measured prior to biaxial flexural strength testing. The topography was analyzed using an atomic force microscope , fracture markings were identified using a stereomicroscope and representative specimens were analyzed using scanning electron microscopy. RESULTS The use of diamond burs significantly increased the surface roughness and decreased the strength of the evaluated ceramic (p⟨0.05). Polishing reduced the ceramic's roughness but resulted in flexural strength similar to that of the groups with wear (p⟩0.05). The glaze-treated specimens showed flexural strength statistically similar to the control group (p>0.05) but higher roughness, similar to those with wear. CONCLUSIONS Polishing reduced the surface roughness but did not affect the biaxial flexural strength of the ZLS ceramic. At the same time, the application of glaze after wear increased the strength.

  • Relationship between fracture toughness and fractal dimensional increment in two types of dental glass-ceramics with different fracture surface roughness
    Kartikeya S. Jodha, Navleen Kaur, Susana M. Salazar Marocho, John J. Mecholsky, Seth T. Lirette, Yuanyuan Duan, and Jason A. Griggs
    Elsevier BV

  • CAD/CAM versus 3D-printing/pressed lithium disilicate monolithic crowns: Adaptation and fatigue behavior
    Rodrigo Ottoni, Susana M. Salazar Marocho, Jason A. Griggs, and Márcia Borba
    Elsevier BV

  • Fracture toughness and fractal analysis of ceramic benchmark materials
    W. B. Key, K. S. Jodha, N. Kaur, S. M. Salazar Marocho, J. J. Mecholsky, and J. A. Griggs
    Springer Science and Business Media LLC

  • Fracture Load of Layered Glass-Ceramic Structures
    S. M. Salazar Marocho, P. F. Cesar, J. A. Griggs, and M. A. Bottino
    Springer Science and Business Media LLC

  • Bonding and Debonding of Zirconia Using Laser Approaches
    Jaccare Jauregui-Ulloa and Susana Marocho
    Quintessence Publishing
    PURPOSE To describe the current findings regarding the use of lasers to enhance the bonding properties of zirconia and to enable its debonding. MATERIALS AND METHODS The PudMed database was searched for literature up to July 2021. The keywords used for zirconia surface treatment were: laser irradiation; zirconia; and bond strength. For ceramic laser debonding, the keywords were: laser irradiation; ceramic; and debonding. RESULTS A total of 36 studies were included for zirconia surface treatment, and 12 for ceramic laser debonding. Nd:YAG, CO2, Er:YAG, Er,Cr:YSGG, and ultrashort lasers were used for surface treatment, whereas only Er:YAG and Er,Cr:YSGG lasers were applied to debond zirconia structures. CONCLUSION The use of laser irradiation to improve the bonding properties of zirconia depends on the type of laser and the parameters used. Among the laser types included in this review, ultrashort lasers have shown the most promising results; however, more studies are needed to prove their superiority over the other lasers for enhancing zirconia bond strength. In terms of debonding, irradiation with different lasers was effective regardless of the ceramic type; however, well-established protocols (ie, laser irradiation time and motion, laser settings) are still needed for different thicknesses and material ceramic types.

  • Laboratory characterization of in-service full-mouth rehabilitation with monolithic translucent zirconia restorations
    Susana M. Salazar Marocho, Mary Beth VanLandingham, Firas Mourad, Andres Pappa, and Sreenivas Koka
    MDPI AG
    The chance to critically and microscopically inspect the quality of bonded restorations once they are delivered to the patient after several pre-cementation steps is rare or nonexistent. Replicas of in-service restorations can provide a wealth of information on the integrity of the restorations and moreover make it possible to bring this information to the laboratory for further detailed analysis. This study aimed to characterize the epoxy replicas of 27 cemented monolithic yttria-stabilized zirconia crowns of the maxillary and mandibular arch to assess surface roughness, topography, and symmetry. The topography of the facial, lingual, and occlusal/incisal surfaces of each crown was observed under the optical microscope and further characterized using the scanning electron microscope. Surface roughness measurements were performed using the atomic force microscope. The optical microscope was used to measure the golden proportion and visible width of the anterior maxillary crowns. Surface damage consistent with unpolished adjustment was identified mostly in the occlusal surface of the posterior teeth. Other irregularities, such as scratch marks, small pits, and coarse pits were also found. The surface roughness had great variability. Not all of the anterior maxillary and mandibular teeth followed the golden proportion concept. This study design allows in vitro characterization of in-service restorations. It provides a framework for using replicas for early identification of patterns or features that can trigger fracture and for analysis of morphology and symmetry.

  • Delayed Systemic Treatment with Cannabinoid Receptor 2 Agonist Mitigates Spinal Cord Injury-Induced Osteoporosis More Than Acute Treatment Directly after Injury
    Michelle A. Tucci, Yilianys Pride, Suzanne Strickland, Susanna M. Salazar Marocho, Ramon J. Jackson, Joshua R. Jefferson, Alejandro R. Chade, Raymond J. Grill, and Bernadette E. Grayson
    Mary Ann Liebert Inc
    Nearly all persons with spinal cord injury (SCI) will develop osteoporosis following injury, and further, up to 50% of all persons with SCI will sustain a fracture during their lives. The unique mechanisms driving osteoporosis following SCI remain unknown. The cannabinoid system modulation of bone metabolism through cannabinoid 1/2 (CB1/2) has been of increasing interest for the preservation of bone mass and density in models of osteoporosis. Using a thoracic vertebral level 8 (T8) complete transection in a mouse model, we performed daily treatment with a selective CB2 receptor agonist, HU308, compared with SCI-vehicle-treated and naïve control animals either immediately after injury for 40 days, or in a delayed paradigm, following 3 months after injury. The goal was to prevent or potentially reverse SCI-induced osteoporosis. In the acute phase, administration of the CB2 agonist was not able to preserve the rapid loss of cancellous bone. In the delayed-treatment paradigm, in cortical bone, HU308 increased cortical-area to total-area ratio and periosteal perimeter in the femur, and improved bone density in the distal femur and proximal tibia. Further, we report changes to the metaphyseal periosteum with increased presence of adipocyte and fat mass in the periosteum of SCI animals, which was not present in naïve animals. The layer of fat increased markedly in HU308-treated animals compared with SCI-vehicle-treated animals. Overall, these data show that CB2 agonism targets a number of cell types that can influence overall bone quality.

  • Characterization of Reinforced and Unreinforced Glass-Ceramic Veneers
    AR Oliveira, KS Jodha, SM Salazar Marocho, and GA Galhano
    Operative Dentistry
    SUMMARY This study aimed to characterize the surface topography, effect of polishing on surface roughness, residual stresses, and hardness in two glass-ceramic veneers. Fifty-two (52) upper incisors were collected, prepared, and scanned for ceramic veneers. Half of the teeth were restored with veneers made up of feldspathic ceramic (FE), and the other half with zirconia-reinforced lithium silicate ceramic (SZ). All the veneers were designed and milled using a CAD/CAM system and later cemented following the manufacturer's guideline. An optical microscope analyzed the topography of the specimens before and after polishing. The surface roughness was measured using the roughness meter (n=12) and the topographical analysis was carried out using an atomic force microscope (n=6). The residual stresses and Vickers' hardness were evaluated by the indentation method in a micro-hardness indenter (n=6). The surface roughness was analyzed using a three-way analysis of variance (ANOVA) followed by a post hoc Tukey test. The Student t-test was used to compare the residual stresses and hardness between the two ceramics. The topographical analysis revealed that both glass-ceramic veneers had similar percentages of specimens with cracks, before (34.6%) and after (42.3%) polishing. The surface roughness decreased after polishing (p<0.001), and the polishing smoothed out the surface of the veneers. The zirconia-reinforced lithium silicate veneer had a lower roughness as compared to the feldspathic one after polishing, while the residual stresses (p=0.722) and hardness (p=0.782) were statistically similar for both ceramic veneers.

  • Fractal analysis at varying locations of clinically failed zirconia dental implants
    Kartikeya S. Jodha, Susana M. Salazar Marocho, Susanne S. Scherrer, and Jason A. Griggs
    Elsevier BV
    OBJECTIVES Previous studies have shown that the fracture toughness of ceramics can be determined from the fractal dimensions (D) of their fracture surfaces and that the surface should be leveled to obtain an accurate D measurement. This study was to determine the effects of leveling operations and distance from the failure origin on the D values. METHODS Twelve clinically failed zirconia implants from four different manufacturers: Axis Biodental (n=7), Z-Systems (n=3), Straumann (n=1), and Swiss Dental Solutions (n=1) were obtained from one of the authors and thoroughly cleaned. Epoxy replicas were made of three locations along the crack path in the center region of each fracture surface (near origin (O), hackle (H), and near compression curl (CC)) using a light body polyvinyl siloxane impression material. Surfaces were scanned in ScanAsyst mode with a scan size of 5μm×5μm and a scan rate of 0.592Hz using the atomic force microscope. The surface scans were then leveled using 1st order flattening operation in the AFM analysis software. The height data before and after the operation were imported into a custom MathCAD script, and FRACTALS software was used to determine the D value by Minkowski Cover algorithm, which was shown previously to be the algorithm with the highest precision. A Wilcoxon signed-rank test, two-way repeated-measures ANOVA, and one-way repeated-measures ANOVA were performed as detailed below. RESULTS The data were not normally distributed (S-W p≤0.05), so a non-parametric repeated measures test (Wilcoxon signed-rank test) was selected. The median D values before and after leveling were 2.161 and 2.174, respectively. There was a significant difference before and after leveling (p<0.001). The two-way repeated-measures ANOVA showed no significant difference among the D values for different implant brands (p=0.66) and scanning locations on the fracture surface (p=0.83). After eliminating the implant brand as a factor, the data passed normality and equal variance tests (S-W p=0.88, BF p=0.15). The mean D values and standard deviations from the three locations (O, H, CC) were 2.183±0.031, 2.179±0.024, and 2.175±0.018, respectively. One-way repeated measures ANOVA showed no significant effect of scanning location (p=0.74). SIGNIFICANCE The leveling operation successfully removed the tilt without decreasing surface tortuosity, as it increased the D values significantly. The fractal dimension was the same at the three locations on the fracture surfaces. This means that hackle and compression curl regions can be used to determine fracture toughness when the failure origin has been lost.

  • Collagen-Elastin-Like Polypeptide-Bioglass Scaffolds for Guided Bone Regeneration
    Bhuvaneswari Gurumurthy, Michelle A. Tucci, Lir‐Wan Fan, Hamed A. Benghuzzi, Pallabi Pal, Gene L. Bidwell, Susana M. Salazar Marocho, Zelma Cason, David Gordy, and Amol V. Janorkar
    Wiley
    The goals of this study are to evaluate the ability of the multicomponent collagen-elastin-like polypeptide (ELP)-Bioglass scaffolds to support osteogenesis of rat mesenchymal stem cells (rMSCs), demonstrate in vivo biocompatibility by subcutaneous implantation in Sprague-Dawley rats, monitor degradation noninvasively, and finally assess the scaffold's ability in healing critical-sized cranial bone defects. The collagen-ELP-Bioglass scaffold supports the in vitro osteogenic differentiation of rMSCs over a 3 week culture period. The cellular (rMSC-containing) or acellular scaffolds implanted in the subcutaneous pockets of rats do not cause any local or systemic toxic effects or tumors. The real-time monitoring of the fluorescently labeled scaffolds by IVIS reveals that the scaffolds remain at the site of implantation for up to three weeks, during which they degrade gradually. Micro-CT analysis shows that the bilateral cranial critical-sized defects created in rats lead to greater bone regeneration when filled with cellular scaffolds. Bone mineral density and bone microarchitectural parameters are comparable among different scaffold groups, but the histological analysis reveals increased formation of high-quality mature bone in the cellular group, while the acellular group has immature bone and organized connective tissue. These results suggest that the rMSC-seeded collagen-ELP-Bioglass composite scaffolds can aid in better bone healing process.

  • In vivo evaluation of biocompatibility, degradability, and bone regenerative potential of collagen-elastin-like polypeptide-bioglass composite scaffolds


  • Abrasion resistance of direct and indirect resins as a function of a sealant veneer
    SusanaMaría Salazar Marocho, TacianaMarco Ferraz Caneppele, DanielMaranha Rocha, MariaAmelia Máximo Araujo, and MárciaCarneiro Valera
    Medknow
    BACKGROUND Abrasive wear is one of the most common type of wear that not only affect teeth, as also dental restorations. Thus to investigate one of the etiological factors as tooth brushing procedure is clinical relevant in order to select the best material combination that may prevent damage of resin dental restoration's abrasion. AIMS This study evaluated the influence of tooth brushing on mass loss and surface roughness of direct Venus (Vs) and indirect Signum (Sg) resin composites, with and without a surface sealant, Fortify (F). MATERIALS AND METHODS Twenty-four specimens were prepared with each resin composite, using their proprietary curing units, according to manufacturer's instructions. All the specimens were polished and ultrasonically cleaned in distilled water for 5 minutes. Half of the specimens of each resin (n = 12) were covered with F (Vs F and Sg F ), except for the control (C) specimens (Vs C and Sg C ), which were not sealed. Mass loss (ML) as well as surface roughness (Ra ) was measured for all the specimens. Then, the specimens were subjected to toothbrush-dentifrice abrasion, using a testing machine for 67.000 brushing strokes, in an abrasive slurry. After brushing simulation, the specimens were removed from the holder, rinsed thoroughly and blot dried with soft absorbent paper. The abrasion of the material was quantitatively determined with final measurements of ML and surface roughness, using the method described above. RESULTS ML data were analyzed by two-way analysis of variance (ANOVA) and the analysis indicated that resin composites were not statistically different; however, the specimens sealed with F showed higher ML. Ra mean values of the groups Vs F and Sg F significantly increased. CONCLUSION Tooth brushing affects mainly the roughness of the direct and indirect resin composites veneered with a sealant.

  • Carbon film coating of abutment surfaces: Effect on the abutment screw removal torque
    Pedro Henrique Corazza, Alecsandro de Moura Silva, José Renato Cavalcanti Queiroz, Susana María Salazar Marocho, Marco Antonia Bottino, Marcos Massi, and Rodrigo Othávio de Assunção e Souza
    Ovid Technologies (Wolters Kluwer Health)
    Purpose:To evaluate the effect of diamond-like carbon (DLC) coating of prefabricated implant abutment on screw removal torque (RT) before and after mechanical cycling (MC). Materials and Methods:Fifty-four abutments for external-hex implants were divided among 6 groups (n = 9): S, straight abutment (control); SC, straight coated abutment; SCy, straight abutment and MC; SCCy, straight coated abutment and MC; ACy, angled abutment and MC; and ACCy, angled coated abutment and MC. The abutments were attached to the implants by a titanium screw. RT values were measured and registered. Data (in Newton centimeter) were analyzed with analysis of variance and Dunnet test (&agr; = 0.05). Results:RT values were significantly affected by MC (P = 0.001) and the interaction between DLC coating and MC (P = 0.038). SCy and ACy showed the lowest RT values, statistically different from the control. The abutment coated groups had no statistical difference compared with the control. Scanning electron microscopy analysis showed DLC film with a thickness of 3 &mgr;m uniformly coating the hexagonal abutment. Conclusion:DLC film deposited on the abutment can be used as an alternative procedure to reduce abutment screw loosening.

  • Bonding of Y-TZP to dentin: Effects of Y-TZP surface conditioning, resin cement type, and aging
    MA Bottino, C Bergoli, EG Lima, SMS Marocho, RO Souza, and LF Valandro
    Operative Dentistry
    SUMMARY Purpose To evaluate the effects of two surface treatments, aging, and two resin cements on shear bond strength between dentin and yttrium-stabilized tetragonal zirconia polycrystal ceramic (Y-TZP). Materials and Methods Eighty human molars were embedded in acrylic resin and sectioned 3 mm below the occlusal plane. These teeth and 80 cylindrical Y-TZP specimens (height, 4 mm; diameter, 3.4 mm) were divided into eight groups (n=10) using the following factors: Y-TZP surface treatment (Vi: low-fusing porcelain [vitrification] + hydrofluoric acid etching + silanization or Si: tribochemical silicatization); cementation strategies (PF: Panavia or CC: Clearfil); and storage (nonaging or aging). Bonding surfaces of 40 Y-TZP specimens received Vi treatment, and the rest received Si treatment. Half of the ceramic-tooth assemblies were cemented with Panavia, the rest with Clearfil. Shear tests were executed using 0.4-mm–thick wire at 0.5 mm/min. Data were analyzed by three-way analysis of variance and Tukey test (α=0.05). Fractures were analyzed. Results Y-TZP surface treatments did not affect bond strength (p=0.762, Vi = Si), while resin cements (p&amp;lt;0.001, Panavia &amp;gt; Clearfil) and aging (p=0.006, nonaging &amp;gt; aging) showed a significant effect. Most failures were in adhesive at dentin-cement interfaces; no failure occurred between zirconia and cement. Conclusion When Y-TZP ceramic is bonded to dentin, the weakest interface is that between dentin and resin cement. The resin cement/Y-TZP interface was less susceptible to failures, owing to Y-TZP surface treatments.

  • Repair bond strength of microhybrid, nanohybrid and nanofilled resin composites: Effect of substrate resin type, surface conditioning and ageing
    Mutlu Özcan, Pedro Henrique Corazza, Susana Maria Salazar Marocho, Silvia Helena Barbosa, and Marco Antonio Bottino
    Springer Science and Business Media LLC
    ObjectivesThis study evaluated the microtensile bond strength (MTBS) of non-aged and aged resin-based composites (RBC) (nanohybrid and nanofilled) after two surface conditioning methods, repaired using the composite of the same kind or a microhybrid composite.Materials and methodsNanohybrid (Tetric EvoCeram—TE) and nanofilled (Filtek Supreme—FS) RBC blocks (5 × 5 × 6 mm) (N = 128) were fabricated and randomly divided into two groups: (a) no ageing (control group) and (b) ageing (5.000 thermocycling, 5–55 °C). RBC surfaces were polished by up to 1,200-grit silicone carbide papers and conditioned with either (a) air abrasion with 30-μm SiO2 particles (CoJet Sand) for 4 s + silane coupling agent (ESPE-Sil) + adhesive resin (VisioBond) (n = 16) or (b) adhesive application only (Multilink A+B for TE; Adper ScotchBond 1XT for FS) (n = 16). In half of the groups, repair resin of the same kind with the RBC and, in the other half, a different kind of composite (microhybrid, Quadrant Anterior Shine—AS) with its corresponding adhesive (Quadrant UniBond) was used. The specimens were submitted to MTBS test (0.5 mm/min). Data were analysed using three-way ANOVA and Tukey's tests. Degree of conversion (DC) of non-aged and aged resin composites (TE, FS) (n = 3 per group) was measured by micro-Raman analyses.ResultsRBC type (p = 0.001) and ageing affected the MTBS results significantly (p = 0.001). Surface conditioning type did not show significant difference (p = 0.726), but less number of pre-test failures was experienced with the CoJet system compared to adhesive resin application only. Repair strength on aged TE showed significantly less (p < 0.05) MTBS than for FS. FS repaired with the same kind of RBC and adhesive resin presented the highest cohesive failures (43 %). DC was higher for TE (71 %) than for FS (58 %) before ageing.ConclusionOn the aged RBCs, less favourable repair strength could be expected especially for nanohybrid composite. For repair actions, RBC surface conditioning could be accomplished with either adhesive resin application only or with CoJet system, providing that the latter resulted in less pre-test failures.Clinical relevanceClinicians could condition the resin surface prior to repair or relayering with either CoJet system or adhesive resin application only, depending on the availability of the system.

RECENT SCHOLAR PUBLICATIONS

  • Screening dental implant design parameters for effect on the fatigue limit of reduced-diameter implants
    M Satpathy, M Loeb, RM Jose, MJ Sinclair, Y Duan, SMS Marocho, ...
    Dental Materials 2025

  • Unraveling the antimicrobial mechanisms and multifunctional performance of boron-doped glass coatings on dental zirconias
    AC da Silva, JFG Silva, C da Silva Rodrigues, EL de Sousa Santos, ...
    Ceramics International 51 (4), 4580-4592 2025

  • Comparing four different methods of measuring fracture toughness and its relationship with fractal dimension in a polycrystalline (3Y-TZP) dental ceramic
    KS Jodha, SMS Marocho, JJ Mecholsky Jr, ST Lirette, Y Duan, JA Griggs
    Dental Materials 2025

  • Fatigue lifetime of reduced-diameter implants placed in different bone models
    PHW Tretto, JA Griggs, KS Jodha, Y Duan, SMS Marocho, A Della Bona
    Dental Materials 40 (11), 1920-1926 2024

  • EFFECT OF LOW-POWER LASER IRRADIATION ON THE SHEAR BOND STRENGTH AND THERMAL CHANGES ACROSS DIFFERENT ZIRCONIA THICKNESSES USING DIFFERENT IRRADIATION TIMES.
    JT Jauregui-Ulloa, NW Hawkins, ST Lirette, TJ Ward, SMS Marocho
    International Journal of Prosthodontics 37 (5) 2024

  • Effect of the CAD/CAM Milling Protocol on the Fracture Behavior of Zirconia Monolithic Crowns
    AR Oliveira, NU Ziglioli, SMS Marocho, J Satterthwaite, M Borba
    Materials 17 (12), 2981 2024

  • Fatigue behavior of multilayer ceramic structures in traditional and reverse layering designs
    LPC Contreras, CS Rodrigues, CP Zucuni, LF Valandro, SMS Marocho, ...
    Journal of Prosthodontics 33 (4), 389-395 2024

  • Strength of a Zirconia-Reinforced Glass-Ceramic after Diamond Bur Adjustment
    BM Pereira, AR Oliveira, RL do Prado, ABG de Carvalho, RM de Melo, ...
    The European journal of prosthodontics and restorative dentistry 31 (4), 398-406 2023

  • Relationship between fracture toughness and fractal dimensional increment in two types of dental glass-ceramics with different fracture surface roughness
    KS Jodha, N Kaur, SMS Marocho, JJ Mecholsky Jr, ST Lirette, Y Duan, ...
    Dental Materials 38 (12), 1977-1988 2022

  • CAD/CAM versus 3D-printing/pressed lithium disilicate monolithic crowns: Adaptation and fatigue behavior
    R Ottoni, SMS Marocho, JA Griggs, M Borba
    Journal of Dentistry 123, 104181 2022

  • Fracture toughness and fractal analysis of ceramic benchmark materials
    WB Key, KS Jodha, N Kaur, SM Salazar Marocho, JJ Mecholsky Jr, ...
    Journal of materials science 57 (22), 10051-10058 2022

  • Fracture Load of Layered Glass-Ceramic Structures
    SMS Marocho, PF Cesar, JA Griggs, MA Bottino
    Strength of Materials 54 (3), 515-524 2022

  • Bonding and Debonding of Zirconia Using Laser Approaches
    MSS Jauregui-Ulloa J
    Int J Prosthodont 35 (4), 530-544 2022

  • Conversando con el editor jefe de la British Dental Journal, Dr. Hancocks, por los 150 aos de la revista.
    SMS Marocho
    Odontologa sanmarquina 25 (1), NA-NA 2022

  • Fracture Toughness and Fractal Dimension of Two Dental Glass-Ceramics
    KS Jodha, N Kaur, SMS Marocho, JJ Mecholsky Jr, ST Lirette, Y Duan, ...
    Dental Materials 38, e59 2022

  • Time-Lapse for Cutting Different Zirconia Thicknesses for Removal Purposes
    SMS Marocho, H Raymond, LR Corby
    Dental Materials 38, e27 2022

  • Low Power Laser Debonding: Ceramic Thickness and Irradiation Time
    JJ Ulloa, SS Marocho
    Dental Materials 38, e22-e23 2022

  • Laboratory Characterization of In-Service Full-Mouth Rehabilitation with Monolithic Translucent Zirconia Restorations
    SM Salazar Marocho, MB VanLandingham, F Mourad, A Pappa, S Koka
    Symmetry 13 (9), 1755 2021

  • Thermal Changes following Er, Cr: Ysgg Laser Irradiation through A Translucent Zirconia
    H Raymond, LR Corby, SMS Marocho
     2021

  • Characterization of reinforced and unreinforced glass-ceramic veneers
    AR Oliveira, KS Jodha, SMS Marocho, GA Galhano
    Operative Dentistry 46 (3), 339-347 2021

MOST CITED SCHOLAR PUBLICATIONS

  • Dental fluorosis: exposure, prevention and management
    JA Alvarez, KM Rezende, SM Marocho, FB Alves, P Celiberti, ...
    Med Oral Patol Oral Cir Bucal 14 (2), E103-7 2009
    Citations: 381

  • Repair bond strength of microhybrid, nanohybrid and nanofilled resin composites: effect of substrate resin type, surface conditioning and ageing
    M zcan, PH Corazza, SMS Marocho, SH Barbosa, MA Bottino
    Clinical oral investigations 17, 1751-1758 2013
    Citations: 113

  • Mechanical strength and subcritical crack growth under wet cyclic loading of glass-infiltrated dental ceramics
    SMS Marocho, AR Studart, MA Bottino, A Della Bona
    dental materials 26 (5), 483-490 2010
    Citations: 93

  • Bonding of Y-TZP to dentin: effects of Y-TZP surface conditioning, resin cement type, and aging
    MA Bottino, C Bergoli, EG Lima, SMS Marocho, RO Souza, LF Valandro
    Operative dentistry 39 (3), 291-300 2014
    Citations: 71

  • Effect of resin cement type on the microtensile bond strength to lithium disilicate ceramic and dentin using different test assemblies
    SM Marocho, M Ozcan, R Amaral, MA Bottino, LF Valandro
    J Adhes Dent 15 (4), 361-8 2013
    Citations: 59

  • Flexural strength of glass‐infiltrated zirconia/alumina‐based ceramics and feldspathic veneering porcelains
    MA Bottino, SM Salazar‐Marocho, FPP Leite, VC Vasquez, LF Valandro
    Journal of Prosthodontics: Implant, Esthetic and Reconstructive Dentistry 18 2009
    Citations: 58

  • In vitro study of fracture load and fracture pattern of ceramic crowns: a finite element and fractography analysis
    RE Campos, CJ Soares, PS Quagliatto, PV Soares, OB de Oliveira, ...
    Journal of Prosthodontics: Implant, Esthetic and Reconstructive Dentistry 20 2011
    Citations: 54

  • Effect of disinfectant solutions on a denture base acrylic resin
    CF Carvalho, AD Vanderlei, SM Salazar Marocho, S Pereira, L Nogueira, ...
    Acta Odontolgica Latinoamericana 25 (3), 255-260 2012
    Citations: 47

  • Shear bond strength between metal alloy and a ceramic system, submitted to different thermocycling immersion times.
    MSM Salazar, SM Pereira, VVZ Ccahuana, SP Passos, AD Vanderlei, ...
    Acta odontologica latinoamericana: AOL 20 (2), 97-102 2007
    Citations: 33

  • CAD/CAM versus 3D-printing/pressed lithium disilicate monolithic crowns: Adaptation and fatigue behavior
    R Ottoni, SMS Marocho, JA Griggs, M Borba
    Journal of Dentistry 123, 104181 2022
    Citations: 32

  • Thermocycling effect on microhardness of laboratory composite resins
    SMB Pereira, AA Castilho, SM Salazar-Marocho, KMC Oliveira, ...
     2007
    Citations: 25

  • Carbon film coating of abutment surfaces: effect on the abutment screw removal torque
    PH Corazza, A de Moura Silva, JRC Queiroz, SMS Marocho, MA Bottino, ...
    Implant Dentistry 23 (4), 434-438 2014
    Citations: 21

  • Strength of a feldspar ceramic according to the thickness and polymerization mode of the resin cement coating
    SMS Marocho, LGS MACEDO, LF VALANDRO, MA BOTTINO
    Dental materials journal 30 (3), 323-329 2011
    Citations: 20

  • J Clin Exp Dent. 2009; 1 (1): e14-18. Dental fluorosis: Exposure, prevention and management
    JA Alvarez, KMPC Rezende, SMS Marocho, FBT Alves, P Celiberti, ...
    J Clin Exp Dent 1 (1), e14-18 2009
    Citations: 19

  • Effect of seating forces on cement–ceramic adhesion in microtensile bond tests
    SMS Marocho, M zcan, R Amaral, LF Valandro, MA Bottino
    Clinical Oral Investigations 17, 325-331 2013
    Citations: 18

  • Fractal analysis at varying locations of clinically failed zirconia dental implants
    KS Jodha, SMS Marocho, SS Scherrer, JA Griggs
    Dental Materials 36 (8), 1052-1058 2020
    Citations: 14

  • Abrasion resistance of direct and indirect resins as a function of a sealant veneer
    TMF Caneppele, DM Rocha, MAM Araujo, MC Valera, SMS Marocho
    Indian Journal of dental research 25 (3), 381-385 2014
    Citations: 8

  • Effect of bleaching agent on dental ceramics roughness
    AD Vanderlei, SP Passos, SM Salazar-Marocho, SM Pereira, VZ Vsquez, ...
    Acta Odontolgica Latinoamericana 23 (3), 249-256 2010
    Citations: 8

  • Bonding and Debonding of Zirconia Using Laser Approaches
    MSS Jauregui-Ulloa J
    Int J Prosthodont 35 (4), 530-544 2022
    Citations: 7

  • Evaluacin de la alteracin dimensional de modelos de yeso resultante de la desinfeccin de la impresin con alginato
    J Goncalves, JMFS Silva, AL Borges, SM Salazar Morocho, ES Uemura
    Acta odontol. venez 2012
    Citations: 7