Dental Materials最新文献

{"title":"Antibacterial coatings for dental implants: A systematic review","authors":"Marta Teulé-Trull ,&nbsp;Pablo Altuna ,&nbsp;María Arregui ,&nbsp;Xavier Rodriguez-Ciurana ,&nbsp;Conrado Aparicio","doi":"10.1016/j.dental.2024.12.001","DOIUrl":"10.1016/j.dental.2024.12.001","url":null,"abstract":"<div><h3>Objectives</h3><div>Despite the high survival rates of dental implants, peri-implantitis is a prevalent complication. Peri-implantitis is related to biofilm that adheres to the surface of implants and causes peri-implant chronic inflammation and bone destruction. Different surface treatments have been proposed to prevent biofilm formation. The objective of this systematic review was analyzing different types of antimicrobial coatings and identifying the most effective one(s) to control bacterial colonization over extended periods of analysis.</div></div><div><h3>Data, sources and study selection</h3><div>We performed a bibliographic search in <em>Pubmed</em> and <em>Cochrane base</em> of articles published after 2010 to answer, according to the PICO system, the following question: What is the most effective antibacterial surface coating for dental implants? Only papers including a minimum follow-up bacteria growth analysis for at least 48 h were selected. After selection, the studies were classified using the PRISMA system. A total of 40 studies were included.</div></div><div><h3>Conclusions</h3><div>Three main categories of coatings were identified: Antibacterial peptides, synthetic antimicrobial molecules (polymers, antibiotics, …), and metallic nanoparticles (silver). Antibacterial peptide coatings to modify dental implant surfaces have been the most studied and effective surface modification to control bacterial colonization over extended periods of incubation as they are highly potent, durable and biocompatible. However, more in vitro and pre-clinical studies are needed to assess their true potential as a technology for preventing peri-implant infections.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"41 3","pages":"Pages 229-247"},"PeriodicalIF":4.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface and bulk viscoelastic stability of solvent-stored bulk-fill resin-based composite","authors":"Halah Thanoon ,&nbsp;Nikolaos Silikas ,&nbsp;David C. Watts","doi":"10.1016/j.dental.2024.10.006","DOIUrl":"10.1016/j.dental.2024.10.006","url":null,"abstract":"<div><h3>Objective</h3><div>Investigate the effect of solvent-storage on surface hardness and bulk creep of <em>fast</em> photo-cured bulk-fill resin-based composite (RBC) compared to <em>conventionally irradiated</em> bulk-fill RBCs.</div></div><div><h3>Methods</h3><div>Three bulk-fill RBCs were studied: Tetric® PowerFill (<em>fast</em> photo-cured bulk-fill RBC) (TPF), Tetric EvoCeram® (EVO), and GrandioSO® x-tra (GSOx) (<em>conventional</em>). Disk-shaped specimens of clinically realistic thickness (4 mm) were prepared from each material for: Group A: <em>surface</em> measurements (18 mm diameter) and Group B: 4 mm diameter for <em>bulk</em> compressive creep measurements. Group A disks were light-cured from the upper ‘occlusal’ surface for either 3 s or 20 s according to the manufacturer’s recommendation. Martens hardness (H_M) of both top and bottom surfaces of each specimen were measured. Group B: 4 × 4 mm cylindrical specimens were fully cured to measure bulk creep (C_B). A 20 MPa static compressive stress was applied for 2 h, followed by 2 h of unloading. Strain deformation was recorded continuously for 4 h. Both Martens and bulk creep studies were performed under the following storage conditions at 37 °C: (i) dry at 24 h post curing (baseline), and (ii) after 7 and 30 d of storage in two different media: distilled water (DW) and 75 % ethanol/water (75 % E/W).</div></div><div><h3>Results</h3><div>At baseline, H_M for all materials ranged from 587 to 439 N/mm² (top) and 398 to 342 N/mm² (bottom). After 30 d of solvent-storage, more pronounced H_M changes were observed, with the bottom surface being more affected. Normalised H_M for TPF decreased by 44 % after 30 d in 75 % E/W. Maximum creep strain ranged from 1.1 % to 2.1 % at baseline, and after 30 d in 75 % E/W this increased from 1.9 % to 2.9 %. Depending on the material and storage condition, the percentage creep strain <em>recovery</em> after 30 d ranged between 65.2 % and 80 %. Increased filler loading in the bulk-fill RBCs decreased the creep strain magnitude and increased the surface hardness.</div></div><div><h3>Significance</h3><div>Solvent storage decreased the Martens hardness of both upper and lower <em>surfaces</em> and increased the <em>bulk</em> creep characteristics of bulk-fill RBCs. Nevertheless, there was a similar relative stability in surface hardness and viscoelastic stability of fast-cured PowerFill compared to <em>conventionally irradiated</em> RBCs.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2157-2163"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142491944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of 3Y-TZP grain boundaries in glazing and layering","authors":"R. Shahmiri ,&nbsp;O.C. Standard ,&nbsp;J.N. Hart ,&nbsp;N. Gharagozlu ,&nbsp;G. Bahmanrokh ,&nbsp;Y. Yin ,&nbsp;S.S. Mofarah ,&nbsp;E. Adabifiroozjaei ,&nbsp;R. Webster ,&nbsp;C.C. Sorrell","doi":"10.1016/j.dental.2024.10.005","DOIUrl":"10.1016/j.dental.2024.10.005","url":null,"abstract":"<div><h3>Objectives</h3><div>Monolithic 3 mol% Yttria-stabilized tetragonal zirconia polycrystal or 3Y-TZP exhibits transformation toughening phenomena which is suitable for dental restorations with minimizing the risk of fracture and to decrease reduction of natural tooth. However, the staining/glazing or layering is required to achieve of a match with the optical properties of natural dentition. The hypothesis under examination is that the physical, chemical, and structural aspects of the 3Y-TZP grain boundaries after the staining/glazing or layering.</div></div><div><h3>Methods</h3><div>The three sintering temperatures of 1400 °C, 1500 °C, and 1600 °C were considered followed by vacuum annealed at 750 °C for 1 min; and air post-annealed at 750 °C for 1 min</div></div><div><h3>Results</h3><div>The initial sintering step in the fabrication of zirconia restorations plays a critical role in the outcomes of the subsequent stages of glazing and layering.</div></div><div><h3>Significance</h3><div>The current study revealed for first time the advantage of vacuum annealing by the presence of ferroelastic domain switching toughening mechanism.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2148-2156"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Current approaches to produce durable biomaterials: Trends in polymeric materials for restorative dentistry applications","authors":"Carmem S. Pfeifer ,&nbsp;Fernanda S. Lucena ,&nbsp;Matthew G. Logan ,&nbsp;Devatha Nair ,&nbsp;Steven H. Lewis","doi":"10.1016/j.dental.2024.10.004","DOIUrl":"10.1016/j.dental.2024.10.004","url":null,"abstract":"<div><div>Dental caries continues to be a public health issue, especially more evident in underserved populations throughout the U.S. Unfortunately, especially with an aging population, hundreds of thousands of resin composite restorations are replaced each year due to recurring decay and fracture. According to several cohort studies, the average life span of this type of restoration is 10 years or less, depending on the caries risk level of the patient and the complexity of the restorative procedure. Any new material development must depart from the simple restoration of form paradigm, in which the filling is simply inert/biocompatible. This review will discuss novel antibiofilm structures, based on a targeted approach specifically against dysbiotic bacteria. Biofilm coalescence can be prevented by using glycosyl transferase - GTF inhibitors, in a non-bactericidal approach. On the tooth substrate side, MMP-inhibiting molecules can improve the stability of the collagen in the hybrid layer. This review will also discuss the importance of testing the materials in a physiologically relevant environment, mimicking the conditions in the mouth in terms of mechanical loading, bacterial challenge, and the presence of saliva. Ultimately, the goal of materials development is to achieve durable restorations, capable of adapting to the oral environment and resisting challenges that go beyond mechanical demands. That way, we can prevent the unnecessary loss of additional tooth structure that comes with every re-treatment.</div></div><div><h3>Clinical significance</h3><div>While proper restorative technique and patient education in terms of diet and oral hygiene are crucial factors in increasing the longevity of esthetic direct restorations, materials better able to resist and interact with the conditions of the oral environment are still needed. Reproducing the success of dental amalgams with esthetic materials continues to be the Holy Grail of materials development.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2122-2134"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142454520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biofilm modulation and demineralization reduction after treatment with a new toothpaste formulation containing fluoride, casein phosphopeptide-amorphous calcium phosphate, and sodium trimetaphosphate: In situ study","authors":"Francyenne Maira Castro Gonçalves ,&nbsp;Eduarda Martins Fontes Cantarella de Almeida ,&nbsp;Christian Hannig ,&nbsp;Julia Paião Quinteiro ,&nbsp;Alberto Carlos Botazzo Delbem ,&nbsp;Mark Lloyd Cannon ,&nbsp;Marcelle Danelon","doi":"10.1016/j.dental.2024.09.018","DOIUrl":"10.1016/j.dental.2024.09.018","url":null,"abstract":"<div><h3>Objective</h3><div>This <em>in situ</em> study aimed to evaluate a new toothpaste formulation containing fluoride (F), casein phosphopeptide amorphous calcium phosphate (CPP-ACP) and sodium trimetaphosphate (TMP) on the process of dental demineralization and biofilm composition.</div></div><div><h3>Methods</h3><div>This crossover double-blind study consisted of five phases, in which 10 volunteers wore intraoral appliances containing four bovine enamel specimens. The cariogenic challenge was performed using 30 % sucrose solution. Blocks were treated 3 ×/day with the following toothpastes: 1) Placebo (No F-TMP-CPP-ACP), 2) 1100 ppm F (1100F), 3) 1100F + 3 %TMP (1100F-TMP), 4) 1100F + 10 %CPP-ACP (1100F-CPP-ACP) and 5) 1100F-CPP-ACP-TMP. After 7 days, the percentage loss of surface hardness (%SH), integrated loss of subsurface hardness (ΔKHN), F, calcium (Ca) and phosphorus (P) concentration in the enamel was determined. The concentration of F, Ca, P and insoluble extracellular polysaccharide (EPS) in the biofilm were analyzed.</div></div><div><h3>Results</h3><div>The addition of CPP-ACP-TMP to 1100F reduced %SH by 42 % and 39 % when compared to the 1100F and 1100F-CPP-ACP (p &lt; 0.001); in addition, to a reduction in lesion body (ΔKHN) by 36 % for the same treatments. The treatment with 1100F-CPP-ACP-TMP led to a significant increase in the concentration of F, P and Ca in the enamel and biofilm, and reduced the concentration of EPS (p &lt; 0.001).</div></div><div><h3>Significance</h3><div>Toothpaste formulation containing 1100F-CPP-ACP-TMP prevented the reduction of enamel hardness and significantly influenced the ionic biochemical composition and insoluble extracellular polysaccharide (EPS) in biofilm formed <em>in situ</em>. These results are promising and provide valuable insights for the design of further clinical trials.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2077-2084"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142454519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of cross-head speed on the bond strength of dental resin to tooth structure – A review and re-analysis","authors":"H. Hassan Elnadif,&nbsp;B.W. Darvell","doi":"10.1016/j.dental.2024.09.020","DOIUrl":"10.1016/j.dental.2024.09.020","url":null,"abstract":"<div><h3>Objective</h3><div>To review the published evidence for the role of cross-head speed on the apparent mechanical properties and bond strength of filled resins to tooth structure in order to identify the causes of inconsistency and contradictory results.</div></div><div><h3>Method</h3><div>The data for all available mechanical test results for studies involving dental resins at more than one strain rate was collected from 22 papers. Statistical reanalysis using linear regression was used to test the hypothesis that cross-head speed was correlated with the outcome, with the implication of causality, in each case.</div></div><div><h3>Results</h3><div>In many cases the expected trend was found, in others not. However, it was apparent that the quality of data was often less than can be achieved, and that known interferences have not been recognized.</div></div><div><h3>Significance</h3><div>Experimental work for the effect of cross-head speed on bond strength and other properties for dental resin-based materials has often failed to reach the standard which is required for useful data and thus better comprehension of behaviour. Other relevant conditions, such as temperature and water saturation, are in need of attention in this context.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2085-2100"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical analysis and performance evaluation of ClearCorrect® aligners as received and after intraoral use: Implications for durability, aesthetics, and patient safety","authors":"TSE. Bouchema ,&nbsp;J. Saunier ,&nbsp;J. Mauriello ,&nbsp;A. Tfayli ,&nbsp;B. Savard ,&nbsp;N. Yagoubi","doi":"10.1016/j.dental.2024.10.003","DOIUrl":"10.1016/j.dental.2024.10.003","url":null,"abstract":"<div><h3>Background</h3><div>Orthodontic treatment with transparent aligners is popular with patients. Any alteration of the plastic material, as subjected to the oral environment, could influence the treatment's durability, the aligner's aesthetic appearance, and the patient's safety.</div></div><div><h3>Purpose</h3><div>This study concerns the physicochemical properties of ClearCorrect® aligners before and after intraoral use, focusing on transparency, surface topography, leachable, polymer glass transition temperature, and viscoelastic properties.</div></div><div><h3>Methods</h3><div>Aligners were collected after two weeks of intraoral use. Unused samples were obtained from the manufacturers. Transparency was measured by UV–visible spectroscopy. Chemical modifications were studied using infrared and Raman spectroscopies. Thermal degradation, glass transition (T_g), and storage modulus (E') were characterized by thermal analysis (DSC, TGA, DMA). Surface morphology and roughness were studied thanks to SEM and AFM. Aligners were immersed in water-based solutions to identify and quantify organic leachable by HPLC chromatography and trace elements by atomic absorption spectroscopy.</div></div><div><h3>Results</h3><div>ClearCorrect® aligners have a three-layer structure (outer PETG/inner PU layers). Slight chemical alterations occurred after aging. There was also no significant evolution in T_g and thermal degradation temperatures and only a minimal evolution of E'. Surface and transparency alterations occurred. A difference in organic compound and trace element release levels between new and used aligners was evidenced, suggesting an intraoral release during use.</div></div><div><h3>Significance</h3><div>Intra-oral aging mainly impacts the aligner transparency and surface. The leachable study suggests significant ingestion of organic and non-organic compounds by the patient: investigations are needed to assess the impact of the long-term use of trays on patient health.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2135-2147"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of polyaryletherketone materials as post-core abutments for removable partial dentures: A finite element analysis","authors":"Filiz Yagci ,&nbsp;Ravza Eraslan ,&nbsp;Emir Esim","doi":"10.1016/j.dental.2024.10.011","DOIUrl":"10.1016/j.dental.2024.10.011","url":null,"abstract":"<div><h3>Objective</h3><div>The purpose was to compare the biomechanical behavior of single-piece post-core restorations made from polyaryletherketone materials with fiber post-core restorations when serving as abutments for RPD using finite element analysis (FEA).</div></div><div><h3>Methods</h3><div>Phantom maxillary central incisor and mandibular second premolar were trimmed 1-mm coronally to cemento-enamel junction; root canals were enlarged and the teeth were scanned. Data was transferred to a solid modeling software.Twenty four models, including six post-core restorations:glass-fiber post/composite core (GFH/GFL) and single-piece post-core groups as, PEKK(PKH/PKL);Ti0₂-reinforced PEEK(TH/TL);ceramic reinforced PEEK(CeH/CeL);carbon fiber reinforced PEEK(CaH/CaL);glass fiber reinforced PEEK(GFPH/GFPL) with hybrid ceramic/lithium disilicate crowns on each tooth were constructed.Loads of 100 N for central incisor, and 300 N for premolar in a 45°oblique direction were applied to simulate masticatory forces. Clasp removal force of a RPD was simulated as 5 N vertically.FEA was employed to evaluate the von Mises stresses.Strain at cement layer was also investigated.</div></div><div><h3>Results</h3><div>CaH/CaL groups revealed the lowest stress for both teeth at root while TH/TL groups revealed the highest stress. The lowest stress values in the post-core were in GFH/GFL groups while the highest stress occurred in the CaH/CaL groups for both teeth.</div></div><div><h3>Significance</h3><div>Glass-fiber post-cores exhibited the lowest stresses in the post under masticatory and clasp removal forces. It may suggest a potentially lower risk of post fracture compared to polyaryletherketone group materials. TiO₂-reinforced PEEK post-cores exhibited the lowest stresses among PAEK materials, indicating a potentially high fracture resistance.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages e113-e120"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and characterization of nitazoxanide-loaded poly(ε-caprolactone) membrane for GTR/GBR applications","authors":"Varuni Arora ,&nbsp;Ruby Yu-Tong Lin ,&nbsp;Yi Ling Tang ,&nbsp;Kai Soo Tan ,&nbsp;Vinicius Rosa ,&nbsp;Gopu Sriram ,&nbsp;Nileshkumar Dubey","doi":"10.1016/j.dental.2024.10.007","DOIUrl":"10.1016/j.dental.2024.10.007","url":null,"abstract":"<div><h3>Objective</h3><div>Guided tissue/guided bone regeneration (GTR/GBR) membranes are widely used for periodontal bone regeneration, but their success depends on a bacteria-free environment. Systemic antibiotic treatment often proves inadequate, moreover, the increasing prevalence of antibiotic resistance in oral infections exacerbates this challenge. This study aimed to fabricate antibacterial membranes using a new class of antibiotics for local drug delivery, to eradicate infections and promote tissue regeneration.</div></div><div><h3>Methods</h3><div>Membranes loaded with nitazoxanide (NTZ) were fabricated via electrospinning using poly(ε-caprolactone) (PCL) with varying concentrations of NTZ (0 %, 2.5 %, and 5 % w/w) relative to the polymer weight. Morphochemical of NTZ-loaded membranes were assessed using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and Fourier Transform Infrared spectroscopy (FTIR). Mechanical properties were evaluated using universal testing machine and NTZ release profile from membranes was determined by spectrophotometer (λ_max = 444) for 14 days. Antimicrobial efficacy against periodontal pathogens, cell compatibility and mineralization were evaluated using periodontal ligament stem cells (PDLSCs).</div></div><div><h3>Results</h3><div>Optimized spinning parameter maintained a uniform fiber diameter and successful loading of NTZ was confirmed by SEM-EDS and FTIR. NTZ incorporation did not significantly affect mechanical properties, whereas the drug release kinetics showed an initial burst, followed by sustained release over 14 days. NTZ-loaded membranes demonstrated antibacterial activity against <em>Aggregatibacter actinomycetemcomitans (Aa)</em> and <em>Fusobacterium nucleatum (Fn)</em>. Importantly, the presence of NTZ showed minimal cell toxicity; however, it reduced the mineralization potential compared with that of the pure PCL membrane, which increased over time.</div></div><div><h3>Significance</h3><div>Taken together, these findings established that NTZ-loaded membranes could be promising barrier membrane to counteract microbial environment and aid periodontal bone regeneration.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2164-2172"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142491941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of metal elements in coloring liquids used in the infiltration method on the physical properties of zirconia","authors":"Takayuki Sugiki ,&nbsp;Shohei Suzuki ,&nbsp;Munetsugu Seto ,&nbsp;Kazuhiko Ueda","doi":"10.1016/j.dental.2024.10.001","DOIUrl":"10.1016/j.dental.2024.10.001","url":null,"abstract":"<div><h3>Objectives</h3><div>This study aimed to clarify the effect of metal elements in the coloring liquids used in the infiltration method on the physical properties of zirconia.</div></div><div><h3>Methods</h3><div>Two types of zirconia discs 5Y-PSZ (SHOFU Disc ZR Lucent FA, SHOFU, Kyoto, Japan) were used: with monolayer shades from W2 to W3 (Pearl White) and 5Y-PSZ with multilayer shades from A3 to A4 (L). Five kinds of coloring liquid were used to infiltrate into semi-sintered Pearl White (T-glass [CT], A4 [CA], White-Opaque [CW], Gingiva 1 [CG], and Blue X [CB]). In addition, uncolored Pearl White set to as the control (C). These specimens were analyzed using a three-point bending test (3PBT), and the fracture surface after the test was analyzed by scanning electron microscopy, elemental analysis, and crystal structure analysis. In addition, from the polished surface part of the after the 3PBT specimens, the elemental composition was analyzed using X-ray fluorescence spectroscopy (XRF).</div></div><div><h3>Results</h3><div>The flexural strength of CB and CG were lower than that of C (p &lt; 0.05). XRF results showed that the Erbium (Er) content of CG was significantly greater than that of C (p &lt; 0.05). CB exhibited a significantly higher Yttrium (Y) content compared with C (p &lt; 0.05), and numerous pores were observed in the micrographs of the fracture surface of CG and CB.</div></div><div><h3>Significance</h3><div>In zirconia, where the content of Y and Er was significantly increased by infiltration with a coloring liquid, pores were observed between the zirconia crystals, and the mechanical strength decreased.</div></div>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":"40 12","pages":"Pages 2114-2121"},"PeriodicalIF":4.6,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142491942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}