Article
Dentistry, Oral Surgery & Medicine
C. A. Jurado, K. Arndt, F. X. Azpiazu-Flores, F. Faddoul, R. Franca, N. G. Fischer, H. Watanabe
Summary: This study evaluated the effects of different polishing systems on the surface roughness of CAD/CAM lithium disilicate and virgilite ceramic. The results showed that polishing and glazing significantly improved the surface smoothness. Zirconia polishing systems provided smoother and more clinically acceptable surfaces compared to the lithium disilicate kits.
OPERATIVE DENTISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Ali Hafezeqoran, Pouya Sabanik, Roodabeh Koodaryan, Kambiz M. Ghalili
Summary: This study aimed to evaluate the impact of sintering speed, aging process, and different surface treatments on the translucency and surface structure of monolithic zirconia restorations. The results showed that speed sintering and polishing can decrease surface free energy and increase translucency, while aging process decreases surface free energy.
JOURNAL OF PROSTHETIC DENTISTRY
(2023)
Article
Engineering, Biomedical
Cheng Chen, Xiaohua Zeng
Summary: The study compared the influence of different polishing systems and durations on the surface roughness and crystal structure of zirconia, showing that the polishing duration and system can affect the surface smoothness and crystal structure of zirconia.
APPLIED BIONICS AND BIOMECHANICS
(2022)
Article
Materials Science, Ceramics
Ming Zhou, Meng Meng, Zhiguo Chai, Yaming Zhang, Ding Li, Lina Niu, Yanmin Jia, Shaofeng Zhang, Fu Wang
Summary: This study investigated the dynamic wear behavior and fracture strength of high-translucent zirconia crowns after wear fatigue. The results showed that the wear volume increased with the wear cycles, with a high wear rate in the initial stage and a lower rate in the later stage. The fracture strength significantly decreased with an increase in fatigue cycles, except after 9 x 10(5) cycles. The worn surface exhibited flattened features with scattered cracks and small punctate defects.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Lei Xu, Kihong Park, Hong Lei, Vinit Kanade, Eungchul Kim, Chaitanya Kanade, Pengzhan Liu, Taesung Kim
Summary: This study introduces the application of micro-nano bubbles in the polishing process of zirconia ceramics, assisting in the polishing of yttria-stabilized zirconia. The results show that micro-nano bubbles play a key role in promoting phase transformation on the surface of zirconia ceramics, leading to more efficient polishing.
CERAMICS INTERNATIONAL
(2022)
Article
Dentistry, Oral Surgery & Medicine
Zhenyu Tang, Xinyi Zhao, Hui Wang
Summary: After 1 year, the wear of the monolithic zirconia crown was found to be minimal, while the wear of the antagonist teeth was significantly higher than that of the natural teeth. The wearing mechanism mainly consists of abrasive and fatigue wear.
Article
Materials Science, Ceramics
Yener Okutan, Yasemin Gundogdu, Hamdi Sukur Kilic, Banucicek Kandemir, Munir Tolga Yucel
Summary: This study aimed to investigate the effects of different femtosecond (fs) laser treatment protocols on the surface roughness and shear bond strength of resin cement to zirconia. The results showed that fs laser treatment can improve the bond strength of resin cement to zirconia, but its effects on the mechanical properties of zirconia need further evaluation.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Abdelrahman Badarneh, Joanne Jung Eun Choi, Karl Lyons, Gemma Porter, Neil Waddell, Kai Chun Li
Summary: The study investigated the effects of surface treatments on the wear behavior of aged zirconia specimens, with glazed-aged zirconia resulting in the greatest enamel wear. Glazing was found to increase enamel wear compared to polishing in most cases.
Article
Chemistry, Physical
Mohit Kheur, Tabrez Lakha, Saleha Shaikh, Supriya Kheur, Batul Qamri, Lee Wan Zhen, Nadin Al-Haj Husain, Mutlu Oezcan
Summary: This study evaluated the effects of different simulated chairside grinding and polishing protocols on the physical and mechanical properties of monolithic zirconia. The results showed that grinding with diamond burs increased surface roughness, while grinding with tungsten carbide burs significantly reduced flexural strength. Compared to the control group, grinding with diamond burs did not weaken zirconia, but further polishing was required.
Article
Dentistry, Oral Surgery & Medicine
Manjia Jin, Jing Zhao, Yuanna Zheng
Summary: The effects of grinding and polishing on the surface characteristics of monolithic zirconia fabricated by different manufacturing processes were evaluated. Grinding changed the surface morphology and increased the surface roughness, but this could be improved by polishing regardless of the type of polishing kit used.
JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY
(2022)
Article
Multidisciplinary Sciences
Susana M. Salazar Marocho, Mary Beth VanLandingham, Firas Mourad, Andres Pappa, Sreenivas Koka
Summary: This study characterized epoxy replicas of cemented zirconia crowns and found surface damage on the occlusal surfaces of posterior teeth, significant variability in surface roughness, and not all anterior teeth following the golden proportion concept. The study design provides a framework for using replicas to identify early patterns or features that may lead to fracture and analyze morphology and symmetry.
Article
Materials Science, Multidisciplinary
Livia Fiorin, Paulo Eduardo Barros Souza Oliveira, Allan Oliveira da Silva, Adriana Claudia Lapria Faria, Ana Paula Macedo, Ricardo Faria Ribeiro, Renata Cristina Silveira Rodrigues
Summary: The purpose of this study was to compare the effect of staining, glazing, and polishing on the wear behavior of different restorative materials. The results showed that polishing reduced wear in most cases, while staining and glazing had variable effects on wear. The 5Y-TZP material exhibited the highest wear resistance, while the MCR material had the lowest wear resistance. Polishing was recommended to improve staining durability and reduce wear rates.
Article
Dentistry, Oral Surgery & Medicine
Isil Ozturk, Ipek Caglar, Zeynep Yesil Duymus
Summary: This study evaluates the effect of adjustment and finishing procedures, as well as thermal aging, on the surface roughness, phase transformation, and flexural strength of monolithic zirconia. The results show that grinding increases surface roughness, but finishing procedures can bring it closer to the control group. The re-glazing after grinding reduces flexural strength, while polishing has no effect. Therefore, zirconia polishing system may be an alternative to re-glazing for monolithic zirconia.
CLINICAL ORAL INVESTIGATIONS
(2022)
Review
Engineering, Biomedical
Lucas Saldanha da Rosa, Rafaela Oliveira Pilecco, Rafael Sarkis-Onofre, Karla Zanini Kantorski, Luiz Felipe Valandro, Gabriel Kalil Rocha Pereira
Summary: This systematic review and meta-analysis aimed to assess the effects of different post-processing methods on the surface roughness and flexural strength of YSZ ceramics after grinding. The findings showed that while post-processing methods were able to improve the surface roughness, the flexural strength of the ground surfaces was generally higher compared to those treated with post-processing techniques, except for polishing.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Ali Hafezeqoran, Pouya Sabanik, Roodabeh Koodaryan
Summary: This study evaluated the effect of sintering speed and polishing or glazing on the failure load (FL) of monolithic zirconia fixed partial dentures. Classic sintering led to the highest FL and strength.
INTERNATIONAL JOURNAL OF PROSTHODONTICS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Robert Bauer, Julian Zacher, Thomas Strasser, Martin Rosentritt
Summary: The study evaluated the performance and fracture load of resin anterior implant-supported interim fixed partial dentures (IFPDs), finding that these interim materials are sufficiently fracture resistant for the fabrication of implant-supported anterior IFPDs, expected to survive between 6 months and 2 years before failure. The stability of IFPDs depended on the type of material but not on the restoration design.
JOURNAL OF PROSTHETIC DENTISTRY
(2021)
Article
Engineering, Biomedical
Martin Rosentritt, Michael Behr, Thomas Strasser, Alois Schmid
Summary: The study aimed to establish a splint testing method and compare the insertion and removal performance of dental splints in-vitro. Results showed significant differences in insertion/pull-off cycles between different materials, with deep-drawn, cast, and combined systems performing better compared to printed or milled splints.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Dentistry, Oral Surgery & Medicine
Verena Hickl, Thomas Strasser, Alois Schmid, Martin Rosentritt
Summary: The study investigated the color, gloss, and roughness changes of splint materials after storage in liquids and toothbrush simulation. The results showed that contact with staining solutions/toothbrush simulation altered the color, gloss, and roughness. The material and storage time had the most significant impact on these changes. Storage and toothbrushing resulted in visible discoloration and decreased gloss values of the splint materials.
CLINICAL ORAL INVESTIGATIONS
(2022)
Article
Dentistry, Oral Surgery & Medicine
Martin Rosentritt, Christina Huber, Thomas Strasser, Alois Schmid
Summary: The study focused on testing experimental rapid prototyping materials for occlusal splints made from Urethandimethacrylate (UDMA) and Urethanmethacrylate (UMA). Mechanical properties were significantly influenced by changes in the UDMA:UMA ratio, with increased amounts of UMA correlating with a decrease in flexural strength, modulus of elasticity, hardness, and wear resistance. Optic properties showed minor influence from UMA content and aging, while gloss was partly influenced by the UDMA:UMA ratio and water storage. Mean survival rates for cyclic pull-off and insertion testing ranged from 2537 to 23,857 cycles, with a correlation observed between the amount of UMA and survival rates. The addition of up to 25% UMA showed promising results, complying with clinical standards and delivering acceptable results in the cyclic pull-off and insertion test.
Article
Engineering, Biomedical
Johann Wulff, Alois Schmid, Christina Huber, Martin Rosentritt
Summary: The study found that the number of loading cycles that additively manufactured splint specimens can withstand depends on the type of material, cleaning, and post-polymerisation. Therefore, the materials, cleaning, and post-polymerisation of additive manufacturing processes should be matched to improve the dynamic loading performance of splint materials.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Engineering, Manufacturing
Felix Sepaintner, Michael Schmalzbauer, Kai Loebbicke, Johannes Jakob, Andreas Scharl, Franz Roehrl, Roman Sammer, Werner Bogner, Stefan Zorn
Summary: This article introduces a method of using inkjet technology to manufacture passive RF structures with smaller line and space dimensions, reducing production costs and improving electrical performance.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Martin Rosentritt, Sebastian Hahnel, Sibylle Schneider-Feyrer, Thomas Strasser, Alois Schmid
Summary: The study analyzed the differences in hardness and energy-converting properties of CAD/CAM resin-based composites using instrumented indentation testing. Significant differences were found between the materials, indicating that some materials may have superior stress-breaking capabilities.
APPLIED SCIENCES-BASEL
(2022)
Article
Medicine, General & Internal
Max L. Poeppel, Martin Rosentritt, Richard Sturm, Florian Beuer, Jeremias Hey, Alois Schmid, Franziska Schmidt
Summary: The study shows that color-gradient multilayer zirconia materials and new strength-gradient zirconia materials with similar yttria levels in the basal layers exhibit comparable mechanical properties and are suitable for anterior FDPs.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Dentistry, Oral Surgery & Medicine
Karin Schnitzhofer, Angelika Rauch, Michael Schmidt, Martin Rosentritt
Summary: This study investigated the impact of occlusal contact situation and occlusal adjustment on wear, roughness, and fracture force of molar crowns. The results showed that resin composite crowns had higher wear area and depth, as well as lower fracture forces. Adjusted crowns exhibited increased wear areas and depths. For zirconia crowns, the adjustment resulted in greater wear area and depth, as well as lower fracture forces. These findings emphasize the importance of adapting occlusal design and adjustment to improve the performance and stability of zirconia and resin composite crowns.
JOURNAL OF DENTISTRY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Thomas Strasser, Markus Wertz, Andreas Koenig, Torsten Koetzsch, Martin Rosentritt
Summary: The objective of this study was to compare the composition, microstructure, and mechanical strength of current multilayer zirconia blanks. Bar-shaped specimens were made from different multilayer zirconia blanks, and the microstructure and crystal structure were analyzed using scanning electron microscopy and X-ray diffraction. The results showed significant differences in flexural strength and grain size between the different layers. The findings suggest that the milling position in the blanks should be considered when using multilayer zirconia as a restorative material.
Article
Engineering, Biomedical
Martin Rosentritt, Angelika Rauch, Sebastian Hahnel, Michael Schmidt
Summary: The purpose of this study was to compare the in-vitro performance and wear behavior of additively or subtractively fabricated resin-based composite molar crowns for temporary and permanent application. The results showed that both temporary and permanent molar crowns, regardless of whether they were additively or subtractively manufactured, provided acceptable in-vitro performance and wear stability.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Chemistry, Physical
Joerg Baechle, Cordula Merle, Sebastian Hahnel, Martin Rosentritt
Summary: The microbiological behavior of dental polymer materials is crucial to ensure the success of dental restorations. This study investigated the adhesion of bacteria on dental polymers as a function of manufacturing techniques and different polishing protocols. The results showed that surface roughness and polishing significantly influenced bacterial adhesion, with horizontally printed materials showing less adhesion compared to vertically printed ones.
Article
Dentistry, Oral Surgery & Medicine
Martin Rosentritt, Dirk Bollin, Michael Benno Schmidt, Angelika Rauch
Summary: This study investigated the stability and wear of tooth-supported zirconia single crowns with micro-layering in vitro. The results showed that the micro-layering technique provided good stability and wear performance, comparable to conventional ceramic veneering systems.
JOURNAL OF DENTISTRY
(2023)
Article
Medicine, General & Internal
Angelika Rauch, Wendy Heinzmann, Martin Rosentritt, Sebastian Hahnel, Michael Benno Schmidt, Florian Fuchs, Andreas Koenig
Summary: This study aimed to investigate the in-vitro aging and fracture resistance of implant-supported molar crowns (iSCs) with a CAD/CAM resin composite veneer structure. The results showed that the choice of framework material significantly influenced the fracture resistance, while the choice of veneering material did not have a significant impact.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Materials Science, Ceramics
Thomas Strasser, Alois Schmid, Christina Huber, Martin Rosentritt
Summary: This study investigated the in vitro performance of 4-unit fixed partial dentures (FPDs) made from different types of zirconia blanks. The results showed that the positioning within multilayer blanks had a slight effect on the fracture force. The study suggests that multilayer, 3Y-TZP-A, 3Y-TZP, and 4Y-TZP are suitable for clinical applications of 4-unit molar FPDs, while the use of 5Y-TZP may be problematic.
CERAMICS-SWITZERLAND
(2022)
Article
Dentistry, Oral Surgery & Medicine
Chang Zeng, Pei Hu, Colin P. Egan, Brian E. Bergeron, Franklin Tay, Jingzhi Ma
Summary: The study compared the bacteria debridement efficacy of the first and second generations of sonic root canal irrigant activation systems. The results showed that activation of 2% NaOCl with either EndoActivator or SmartLite Pro EndoActivator significantly reduced the overall intracanal bacterial load compared to syringe-side-vented needle delivery. However, delivering 2% NaOCl for 5 minutes using the syringe-side-vented needle produced better bacteria debridement than either sonic agitation system.
JOURNAL OF DENTISTRY
(2024)
Article
Dentistry, Oral Surgery & Medicine
Alaa Husni Qari, Raghad Mohammed Alharbi, Shahd Saud Alomiri, Banan Nasser Alandanusi, Lina Ayman Mirza, Mohammad Hasan Al-Harthy
Summary: The study compares the experience of patients seen using teledentistry with traditional Orofacial Pain and TMD visits. Results indicated a borderline difference in effectively using teledentistry for follow-ups among different age groups, but no significant differences were found in patients' experience between virtual and conventional visits. This suggests that high-quality dental care services can be provided remotely without adversely affecting patient experience or quality of care.
JOURNAL OF DENTISTRY
(2024)
Article
Dentistry, Oral Surgery & Medicine
Giovanna Iezzi, Barbara Zavan, Morena Petrini, Letizia Ferroni, Tania Vanessa Pierfelice, Ugo D'Amora, Alfredo Ronca, Emira D'Amico, Carlo Mangano
Summary: This study characterized the surface topography and evaluated the biological responses of various cells to a novel 3D-printed dental implant. The surface of the implant showed a highly interconnected porous architecture and roughness, leading to good adhesion and growth of human oral osteoblasts, gingival fibroblasts, mesenchymal stem cells, and monocytes. These findings suggest that this 3D-printed implant has excellent potential for clinical applications.
JOURNAL OF DENTISTRY
(2024)