About

Russell Giordano, D.M.Sc., is a professor in the Department of Restorative Sciences and Biomaterials at Boston University College of Engineering. He received specialty training in prosthodontics at Harvard School of Dental Medicine and performed research at the Ceramics Processing Research Laboratory at the Massachusetts Institute of Technology, leading to his D.M.Sc. degree in 1991 and a Certificate in Prosthodontics. His primary appointment is at the Goldman School of Dental Medicine. His research focuses on the fabrication of multiple phase interpenetrating ceramic composites, involving the infusion of porous ceramic matrices with resins, glasses, and metals to develop materials suitable for CAD-CAM machining systems and innovative medical and dental implant devices. He investigates the effects of machining and polishing conditions on ceramic materials, analyzing residual stress development and strength alterations caused by these processes. His work includes the use of milling devices such as the CEREC 2 and Celay to fabricate test specimens from various ceramic materials, comparing different conditions to understand their impact on ceramic properties. Additionally, Dr. Giordano is involved in the characterization and analysis of new materials introduced to the dental community, focusing on their mechanical, physical, and chemical properties, particularly ceramic, composite resin, and metal restorative systems. He also serves as the Director of Biomaterials and as Assistant Dean for Patient Care in the Office of Clinical Affairs at Boston University.

Research topics

• Materials science
• Computer Science
• Composite material
• Artificial Intelligence
• Inorganic chemistry
• Dentistry
• Medicine
• Chemistry
• Mechanical engineering
• Engineering
• Statistics
• Organic chemistry
• Engineering drawing
• Crystallography
• Nuclear chemistry
• Mineralogy
• Biomedical engineering
• Mathematics

Selected publications

• Physical and mechanical properties of a strontium silicate-based sealer

  Odontology · 2026-01-25

  article
  PublisherDOI

• Comparative analysis of the bond strength of digital denture base materials

  Journal of Prosthodontics · 2025-07-21 · 1 citations

  articleSenior author

  PURPOSE: Evaluate the bond strength of commercial digital denture base materials to denture teeth and characterize composite resins. MATERIALS AND METHODS: Twenty-four square-shaped specimens were prepared from Lucitone 199 denture base disc (Dentsply Sirona), AvaDent denture base puck (AvaDent), KeyMill denture base disc (Keystone), Lucitone digital print denture base resin (Dentsply Sirona), Formlabs denture base resin (Formlabs), and Dentca denture base resin II (Dentca) to test the bond strength to manufacturer-recommended denture teeth and characterize composite resin. Bond strength was determined using the shear bond test. Data were analyzed using one-way ANOVA followed by Tukey's HSD test (α = 0.05). Failure mode for all debonded specimens was analyzed using a stereomicroscope. RESULTS: The milled bases exhibited better bonding to manufacturer-recommended denture teeth but showed a low bond strength to the characterizing composite resin. In contrast, the printed bases showed a low bond strength to the manufacturer-recommended denture teeth material but displayed a better bond strength to the characterizing composite resin. The difference was statistically significant (p < 0.05). CONCLUSION: This study demonstrates that the bond strength of milled denture bases to the manufacturer-recommended denture teeth is higher compared to that of printed denture bases, except for Lucitone 3D, which exhibited significantly higher bond strength when using Digital Fuse techniques. Future research should investigate surface modification strategies to improve long-term durability of bonds between denture bases and both denture teeth, and characterize composite resins as achieving reliable bonding to digital denture bases remains a clinical concern.

  PublisherDOI

• Color stability of pressed lithium disilicate ceramics under repeated firings evaluated by different methods

  The International Journal of Prosthodontics · 2024-03-01

  articleSenior author

  PURPOSE: To determine and compare color differences of pressed lithium-disilicate ceramic specimens after repeated firing cycles. Another objective was to determine and evaluate the correlation of CIEDE2000 values analyzed using X-Rite Color i5 spectrophotometer, VITA EasyShade Advance 4.0, and Adobe Photoshop. MATERIALS AND METHODS: Tile specimens (n = 36) with 8 × 10 × 1.5 mm dimensions were prepared using lithium-disilicate monochromatic ingots (IPS e.max Press MT, Ivoclar) and lithium-disilicate multichromatic ingots (IPS e.max Multi Press, Ivoclar). Specimens were exposed to seven repeated firing cycles. Color analysis was performed after the first, second, third, fifth, and seventh firing cycles. CIE L*a*b* values were measured with Color i5 spectrophotometer, EasyShade, and Photoshop. CIE DE*2000 (ΔE*00) was calculated to estimate color differences. RESULTS: Linear regression and multiple comparison analysis (Tukey HSD test) showed a statistically significant (P < .001) color difference ΔE*00 after multiple firing cycles. Statistically significant differences (P < .05) were also noted in different shade groups and between different instruments used for shade evaluation. Moreover, significant differences (P < .05) were found in interactive effects between different shades tested using different instruments, different shades tested after multiple firing cycles, and different instruments after multiple firing cycles. CONCLUSIONS: Lithium-disilicate material shows significant color differences after repeated firing cycles tested with three color analysis instruments. However, those differences are considered clinically acceptable. Measuring instruments used to evaluate CIE L*a*b* color values showed significant differences in color values analysis. Nevertheless, those differences are within the human perceptible tolerance threshold.

  PublisherDOI

• Effect of different storage conditions on dimensional accuracy of 3D‐printed dental models

  Journal of Prosthodontics · 2024 · 11 citations

  Senior authorCorresponding
  • Computer Science
  • Artificial Intelligence
  • Materials science

  PURPOSE: The objective was to determine the accuracy of 3D-printed dental models subjected to different storage conditions using six different material and printer combinations. MATERIALS AND METHODS: Three completely dentate models were designed using dental CAD software (3Shape Dental System). A horseshoe-shaped solid base with a posterior horizontal bar was used. The models were printed in a horizontal direction against the building platform without support. The models were printed using six printers with the corresponding recommended resin material: Carbon M2 (DPR10), HeyGears A2D4K (Model HP UV2.0), Stratasys J5 (MED610), Stratasys Origin One (DM200), Envision One (E-Model LightDLP), and Asiga Pro4K (VeriModel) with a standard layer thickness of 50 μm. All printed models underwent scanning using a laboratory scanner (Sirona inEOS X5) after printing. Subsequently, the models were randomly assigned into three groups of storage conditions, LT: cold environment (4 ± 1°C), HT: hot and dry environment (50 ± 2°C), and RT: room temperature (25 ± 2°C) serving as the control. Each group was kept under the designated condition and was scanned at 1, 2, 3, 4, and 8 weeks. The total number of models (N) was 72, with 6 printers producing 12 models per printer for 3 storage conditions, resulting in 4 models for each storage condition and each printer. The generated STL files were imported into a 3D inspection software for comparison with the original STL files. In-tolerance percentage, the deviation RMS, trueness, and precision were obtained and analyzed with least square mean linear regression using JMP Pro 15 to identify the significant effects (α = 0.05). RESULTS: The in-tolerance percentage as-printed was significantly different among different printers. Significant dimension deviations were observed after the first week of storage at HT and with subsequent weeks of storage. RT and LT did not show significant dimensional changes. Models printed with Carbon M2 showed the highest in-tolerance percentages compared to the other printers. CONCLUSIONS: The model deviations were affected by storage conditions and the printer used, with high-temperature storage showed least stability compared to low and room temperatures. No significant difference was observed between low and room temperature storage conditions. The Carbon M2 printer showed the highest accuracy among all printers tested. The region had a significant effect on the deviation measured, with the abutment body showing the least deviation. Among the 3D printers evaluated, A2D4K by HeyGears and Carbon M2 printers demonstrated the highest accuracy in terms of both precision and trueness.

  PublisherOA PDFDOI

• Effect of machining damage on the surface roughness and flexural strength of CAD-CAM materials

  Journal of Prosthetic Dentistry · 2024-09-10 · 7 citations

  articleOpen accessSenior author
  PublisherOA PDFDOI

• Comparison of the flexural strength of printed and milled denture base materials

  BMC Oral Health · 2024-08-10 · 13 citations

  articleOpen accessSenior author

  BACKGROUND: To evaluate the flexural strength of digitally milled and printed denture base materials. METHODS: The materials tested were Lucitone 199 denture base disc (Dentsply Sirona), AvaDent denture base puck (AvaDent), KeyMill denture base disc (Keystone), Lucitone digital print denture base resin (Dentsply Sirona), Formlab denture base resin (Formlabs), and Dentca base resin II (Dentca). Sixty bar-shaped specimens of each material were prepared for flexural strength testing and were divided into five groups: control, thermocycled, fatigue cycled, and repair using two different materials. The flexural strength and modulus were tested using a 3-point bend test performed on an Instron Universal Testing Machine with a 1kN load cell. The specimens were centered under a loading apparatus with a perpendicular alignment. The loading rate was a crosshead speed of 0.5 mm/min. Each specimen was loaded with a force until failure occurred. A one-way ANOVA test was used to analyze the data, followed by Tukey's HSD test (α = 0.05). RESULTS: The milled materials exhibited higher flexural strength than the printed materials. Thermocycling and fatigue reduce the flexural strengths of printed and milled materials. The repaired groups exhibited flexural strengths of 32.80% and 30.67% of the original flexural strengths of printed and milled materials, respectively. Nevertheless, the type of repair material affected the flexural strength of the printed materials; the composite resin exhibited higher flexural strength values than the acrylic resin. CONCLUSIONS: The milled denture base materials showed higher flexural strength than the printed ones.

  PublisherDOI

• Ceramics overview

  BDJ · 2022 · 56 citations

  1st authorCorresponding
  • Materials science
  • Dentistry
  • Composite material
  PublisherDOI

• Interaction of doped magnesium, zinc and fluoride ions on hydroxyapatite crystals grown on etched human enamel

  Journal of Crystal Growth · 2021 · 15 citations

  • Chemistry
  • Nuclear chemistry
  • Inorganic chemistry
  PublisherDOI

• Mechanical Properties of Translucent MultilayeredDental Zirconia

  Journal of Dentistry & Oral Disorders · 2020-02-25 · 1 citations

  articleSenior author
  Publisher

• Effect of time period on biaxial strength for different <scp>Y‐TZP</scp> veneering porcelains

  Journal of Esthetic and Restorative Dentistry · 2020-06-21 · 4 citations

  article

  Abstract Objective To assess the influence of time period on strength for different conventional Y‐TZP porcelains. Materials and methods Four types of porcelain were used. Porcelain powders were pressed in a steel die and fired in a furnace as recommended by the manufacturer. The blocks were sectioned into 2 mm‐thick discs. Seventy specimens were fabricated from each type of porcelain. Of six jars, three contained 40 mL of dH 2 O and three were dry. Ten specimens were placed in each jar and stored in an incubator at 37°C. A biaxial flexural strength test was performed for all specimens at the baseline and each succeeding year for all groups, for 3 years, using an Instron with a crosshead speed of 0.5 mm/min. Results The data were analyzed by ANOVA and Tukey at α = .05. At the baseline, the biaxial flexural strength of VitaVM9 was significantly higher than that of NobelRondo; however, there were no significant differences among Vita VM9 and Noritake CZR or NobelRondo, Lava Ceram, and Noritake CZR. There were significant reductions in the biaxial flexural strengths of all porcelains. Conclusions After 3 years, all porcelain groups showed a significant decrease in biaxial flexural strength. The medium used is found to have no significant effects on the mean biaxial flexural strength. Clinical Significance Certain commercially available Y‐TZP porcelains are susceptible to decrease in strength over time, which might impact the integrity of veneered zirconia restorations. This reduction in strength is among the most common reasons for the failure of veneered zirconia as reported in several studies.

  PublisherDOI

Recent grants

• NIH Grant F32DE005558

  NIH · $60k

Frequent coauthors

• Stephen D. Campbell

  University of Illinois Chicago

  23 shared

• Richard Pober

  Boston University

  21 shared

• Lionel B. Pelletier

  Institut National des Sciences Appliquées de Lyon

  19 shared

• Aram Sirakian

  Boston University

  9 shared

• Michael J. Cima

  Massachusetts Institute of Technology

  6 shared

• Benjamin M. Wu

  Samueli Institute

  4 shared

• Emanuel M. Sachs

  4 shared

• Yuwei Fan

  Zhejiang University of Finance and Economics

  4 shared