Journal of Prosthetic Dentistry最新文献

{"title":"Precision of stereophotogrammetry in complete arch implant recordings: A clinical study.","authors":"Maria Estibalez-Recasens, Carlos Serrano-Granger, Andrea Santamaría-Laorden, Cristina Andreu-Vázquez, Jaime Orejas-Pérez","doi":"10.1016/j.prosdent.2024.12.021","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.021","url":null,"abstract":"<p><strong>Statement of problem: </strong>Stereophotogrammetry has been proposed as an alternative to intraoral scanners for recording the location of multiple dental implants. Most studies evaluating its accuracy have been in vitro, and clinical studies are lacking.</p><p><strong>Purpose: </strong>The purpose of this clinical study was to evaluate the precision of a stereophotogrammetry system for complete arch prostheses supported by 6 implants.</p><p><strong>Material and methods: </strong>A total of 10 participants with a completely edentulous maxilla with 6 multiunit implant abutments were recruited. For each participant, 5 recordings were made using a stereophotogrammetry device (PIC system; PIC dental). From the resulting standard tessellation language (STL) files, linear and angular Euclidean distances were recorded. A statistical analysis of the measurements obtained was used to determine their repeatability and to identify maximum discrepancy values. A comparative analysis of the standard deviation values was performed with the Kruskal-Wallis and Sidak statistical tests. (α=.05).</p><p><strong>Results: </strong>For linear distances, the mean ±standard deviation precision was 14.71 ±12.2 µm, with a maximum discrepancy of 61 µm. For the angular measurements, the mean ±standard deviation precision was 0.072 ±0.064 degrees, with a maximum discrepancy of 0.345 degrees. Statistically significant differences (P<.05) were found among the different implant spans.</p><p><strong>Conclusions: </strong>The results suggested that the stereophotogrammetry device was sufficiently precise for recording implant locations in complete arch prostheses supported by 6 implant abutments.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of microbiota and interleukin-1 beta in tears and conjunctival secretions of patients with ocular defects after using unilateral ocular prosthesis.","authors":"Rohit Bhandari, Raghuwar Dayal Singh, Jitendra Rao, Shuchi Tripathi, Prashant Gupta, Sanjiv Kumar Gupta","doi":"10.1016/j.prosdent.2024.12.009","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.009","url":null,"abstract":"<p><strong>Statement of problem: </strong>Clinical studies evaluating the levels of interleukin-1 beta (IL-1β) in tears and conjunctival secretions of patients with ocular defects after using ocular prostheses are lacking. Therefore, a comparative evaluation of IL-1β levels in the defective eye before and after placement of an ocular prosthesis is needed.</p><p><strong>Purpose: </strong>The purpose of this clinical study was to compare the microbiota and IL-1β in tears and conjunctival secretions of patients with an ocular defect after using an ocular prosthesis.</p><p><strong>Material and methods: </strong>Patients visiting the prosthodontic department for the rehabilitation of an eye defect that could be restored with an ocular prosthesis were screened with predetermined inclusion and exclusion criteria. Twenty participants were enrolled in the study, and written informed consent was obtained. An ocular prosthesis was provided for each participant to manage anophthalmia. Tear samples for the evaluation of microbiota and IL-1β levels were collected from each participant from the healthy and the defective eye before and after using the ocular prosthesis. The culture method was used to identify microbiotas, and the IL-1β was quantified using an enzyme-linked immunosorbent assay sandwich kit. The obtained data of all parameters were tabulated and compared by using a statistical software program (α=.05).</p><p><strong>Results: </strong>A statistically significant difference was observed on comparing microbiota and the levels of IL-1β, with a significant increase in the levels after the ocular prosthesis was provided (P<.05).</p><p><strong>Conclusions: </strong>Levels of IL-1 β in the test group increased as compared with the control group. The increase might be attributed to the inflammatory changes as a result of change in microbiota.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gingival margin interfacial microleakage, staining, and push-out strengths of gingival colored composite resins in denture bases.","authors":"Adriana Pinto Bezerra, Alexandra Feldmann, Luiz Carlos de Lima Dias Junior, Bruno Manoel Medeiros E Silva, Laura Costa Beber Copetti, Thais Marques Simek Vega Gonçalves","doi":"10.1016/j.prosdent.2024.12.027","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.027","url":null,"abstract":"<p><strong>Statement of problem: </strong>Staining at the gingival margin could impact denture longevity, but the behavior of gingival colored composite resins (GCCs) in this area remains unclear.</p><p><strong>Purpose: </strong>This in vitro study evaluated surface staining, microleakage, and push-out bond strength at the gingival margin of artificial teeth, comparing two consistencies of GCCs with two resin base materials.</p><p><strong>Material and methods: </strong>Specimens included artificial teeth (Ivostar; Ivoclar AG) and two acrylic resin base materials: conventional (Ondacryl; Clássico) and high-impact (Diamond D; Keystone Industries) (n=300). Specimens were divided in three groups: control (acrylic resin) and experimental groups, receiving one of the two GCCs consistencies: paste (SR Nexco; Ivoclar AG) or flowable (Gradia Plus Gum; GC Europe)). Initial artificial aging treatment in distilled water (5 days at 55º C) was performed and the specimens were then immersed in 5% methylene blue dye or coffee for 7 days at 37º C. Staining was visually assessed, and the specimens were sectioned for dye infiltration analysis at the gingival margin using a stereomicroscope. Bond strength was measured with the push-out test in the gingival colored composite resin specimens. Data were analyzed using 2-way and 3-way ANOVA with Bonferroni post hoc test and Kruskal-Wallis test with Dunn post hoc test (α=.05).</p><p><strong>Results: </strong>A significantly higher surface staining and microleakage was observed in experimental groups compared to the control (acrylic resin) (P<.001). Surface staining revealed that paste consistency GCC was more susceptible to discoloration in coffee, while flowable GCC was more affected by methylene blue. Lower microleakage values were observed in the control (acrylic resin) groups (0.11 ±0.13 mm for the conventional base and 0.08 ±0.11 mm for the high-impact base) in comparison with the experimental groups (P<.05). The flowable GCC showed the highest microleakage with methylene blue (0.98 ±0.21 mm for the conventional base and 0.91 ±0.31 mm for the high-impact base), significantly greater than the paste consistency for both base materials (0.53 ±0.22 mm for the conventional base and 0.66 ±0.34 mm for the high-impact base; P<.001). For coffee immersion, both GCC consistencies displayed similar microleakage values (P>.05). Push-out bond strength was comparable between paste and flowable GCCs (P>.05).</p><p><strong>Conclusions: </strong>Microleakage at the gingival margin was significantly greater when GCC was applied, regardless of the consistency. However, the GCC consistency seems to not affect push-out bond strength. Further clinical studies are needed to better understand the impact of these findings on prosthesis longevity.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143028963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of sintering temperature and aging on the color and translucency of zirconia.","authors":"Madalena Lucia Pinheiro Dias Engler, Ana Elisa Colle Kauling, Joseane Silva, Caroline Freitas Rafael, Anja Liebermann, Claudia Angela Maziero Volpato","doi":"10.1016/j.prosdent.2024.12.022","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.022","url":null,"abstract":"<p><strong>Statement of problem: </strong>Translucent zirconias are promising materials for monolithic prostheses. However, information on their optical behavior after sintering and aging protocols is scarce.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the color and translucency of zirconia subjected to different sintering temperatures and aging.</p><p><strong>Material and methods: </strong>A total of 180 1.5-mm-thick disks were produced from translucent zirconia blocks: DD cubeX² white, DD cubeX² A2 shade, DD Bio ZX² white (Dental Direkt GmbH), and Lava Plus white (3M ESPE). White and A2 shade disks were made for each zirconia. DD Bio ZX² and Lava Plus were colored by immersion in dyeing liquids. All disks were divided according to the sintering temperature: 1400 ºC, 1450 ºC, and 1500 ºC (T₀). Subsequently, the disks were subjected to an aging protocol in an autoclave for 5 (T₁) and 20 hours (T₂). The L*a*b* coordinates were measured with a spectrophotometer. ∆E₀₀, ∆L', ∆C', ∆H', and TP were calculated using CIEDE2000, and CR was obtained using CIEXYZ. Repeated measures ANOVA and the Tukey HSD test were used for statistical analysis (α=.05).</p><p><strong>Results: </strong>The 1400 ºC temperature produced the greatest ΔE₀₀ (5.25). A progressive increase in ΔE₀₀ was found after aging (especially in T₂), with a reduction in lightness and an increase in saturation in most groups (P<.001). The DD cubeX² white (DCW) and A2 (DCC) groups presented the highest TP₀₀ values, mainly at 1500 °C. The highest CR values were observed in the Lava Plus colored (LPC) group (1400 °C) (P<.001).</p><p><strong>Conclusions: </strong>Sintering at a lower temperature than that recommended by the manufacturer can reduce lightness and increase saturation and opacity, especially after aging.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143023843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement of volumetric wear of printed polymer resin and milled polymer infused ceramic network definitive restorative materials.","authors":"Christian A Loo, Damian J Lee, Robert R Seghi, Scott R Schricker","doi":"10.1016/j.prosdent.2024.11.020","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.11.020","url":null,"abstract":"<p><strong>Statement of problem: </strong>Currently there is no regulatory requirement or international standard for the wear resistance of dental materials and therefore no need to test prior to market launch.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate and compare the total volumetric wear characteristics of milled polymer infiltrated ceramic network (MPICN) and printed polymer resin (PPR) as substrates opposing five antagonists, human enamel (EN), lithium disilicate (LD), zirconia (ZR), MPICN, and PPR, and to evaluate and compare the volumetric wear of these same materials as antagonists.</p><p><strong>Material and methods: </strong>Ten of each antagonist for a total of 50 EN, LD (IPS e.max CAD), ZR (IPS e.max ZirCAD MT), MPICN (Crystal Ultra), and PPR (Crowntec for NextDent) were shaped into spherical heads and were tested against 2 disk-shaped substrates, MPICN (Crystal Ultra) and PPR (Crowntec for NextDent). Specimens were tested in a wear machine with a third-body food substitute and loaded with a force of 20 to 70 N at 1 Hz for 100 000 cycles. The total wear volume was digitally measured by comparing scans before and after cycling. The area of the wear facet of the antagonists was measured in a similar way and used to estimate the total volume loss of the antagonists. Data were analyzed using 2-way and 1-way ANOVA followed by the Tukey multiple comparisons post hoc test (α=.05).</p><p><strong>Results: </strong>Antagonist type was found to significantly affect the total volume wear of the substrate (P=.022). EN was found to cause significantly more wear in opposing substrates than ZR and PPR. Substrate material did not significantly affect the wear rate of the substrates (P=.345) nor did the interaction between substrate and antagonist type (P=.150). Antagonist wear was significantly affected by antagonist type (P<.001), with ZR showing no visible signs of wear and MPICN showing the most wear overall; substrate type (P=.002), with antagonists opposing MPICN showing more wear than PPR; and their interaction (P=.031).</p><p><strong>Conclusions: </strong>Differences in the wear resistance of milled polymer infiltrated ceramic network and printed polymer resin definitive restorative materials were found but varied depending on the opposing material. No material showed superior wear resistance across all tests. Overall, printed polymer resins created less wear in opposing antagonists than milled polymer infiltrated ceramic network materials.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep learning-based detection of incisal translucency patterns.","authors":"Sthithika Shetty, Sivaranjani Gali, Venkatesh R, Jeswin Ms, Thippeswamy Mn","doi":"10.1016/j.prosdent.2024.11.018","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.11.018","url":null,"abstract":"<p><strong>Statement of problem: </strong>The evaluation of incisal translucency in anterior teeth greatly influences esthetic treatment outcomes. This evaluation is mostly subjective and often overlooked among dental professionals. The application of artificial intelligence-based models to detect the incisal translucency of anterior teeth may be of value to dentists in their restorative dental practice, but studies are lacking.</p><p><strong>Purpose: </strong>The purpose of this study was to assess the accuracy of deep learning models in predicting the translucency patterns of anterior teeth.</p><p><strong>Material and methods: </strong>Approximately 240 Joint Photographic Experts Group (JPEG) images of anterior teeth from participants over 18 years were collected using a smartphone. These images were resized to 224×224 pixels and classified by the presence or absence of translucency. Augmentation techniques enhanced the training dataset, and a 3-model deep learning approach was used: YOLOv5 detected central incisors, Vision Transformers (ViT) identified translucency, and U-Net segmented the translucent areas. The images were split 80 to 20 for training and testing, with performance evaluated using accuracy, precision, recall, F1 score, confusion matrix, and dice scores.</p><p><strong>Results: </strong>YOLOv5 achieved a precision of 1.00 at a confidence threshold of 0.910. The ViT system showed an accuracy of 91.66%, with 58 of 64 images predicting correctly with an F1 score of 94.83%. U-Net segmentation after training with annotated images achieved an accuracy of 91% with a dice score of 0.948.</p><p><strong>Conclusions: </strong>The integration of YOLOv5 for detection, ViT for classification, and U-Net for segmentation demonstrates a comprehensive approach to addressing the classification of incisal translucencies. By leveraging the strengths of deep learning models, high accuracy and precision can be achieved in detecting the incisal translucency patterns of anterior teeth.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of edentulous areas on the accuracy of the maximum intercuspal position recorded by using different intraoral scanners or an artificial intelligence-based program.","authors":"Marta Revilla-León, Panagiotis Ntovas, Abdul B Barmak, John C Kois, Jorge Alonso Pérez-Barquero","doi":"10.1016/j.prosdent.2024.12.010","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.010","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Statement of problem: &lt;/strong&gt;Intraoral scans can be articulated in maximum intercuspal position (MIP) by using an artificial intelligence (AI) based program; however, the impact of edentulous areas on the accuracy of the MIP located using this AI-based program is unknown.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Purpose: &lt;/strong&gt;The purpose of this in vitro study was to assess the impact of edentulous areas (0, 1, 2, 3, and 4 posterior mandibular teeth) on the accuracy of the MIP located using 3 intraoral scanners (IOSs) and an AI-based program.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Material and methods: &lt;/strong&gt;Stone casts articulated in MIP in an articulator were digitized (T710). Five groups were created: no edentulous area (Group 0) or edentulous area of 1 (Group 1), 2 (Group 2), 3 (Group 3), or 4 (Group 4) posterior mandibular teeth. A maxillary and mandibular scan were obtained from the reference casts with 3 IOSs: Primescan, Aoralscan3, and i700. The nonarticulated scans were duplicated 20 times. Six subgroups were created based on the program used to locate the MIP: 3 IOS subgroups: PrimeScan, AoralScan3, and i700 and 3 subgroups for the AI-based program (Bitefinder) (Primescan-AI-articulated, Aoralscan3-AI articulated, and i700-AI articulated) (n=10). In the Group 0-Primescan subgroup, the 10 duplicated corresponding scans were articulated by recording a bilateral occlusal record. In the Group 0-Primescan-AI articulated subgroup, the 10 duplicated corresponding scans were automatically articulated in MIP by the AI-based program. In the Group 0-Aoralscan3 and Group 0-i700 subgroups, the same procedures were completed as in the Group 0-Primescan. In the Group 0-Aoralscan3-AI articulated and Group 0-i700-AI articulated subgroups, the same procedures were accomplished as in the Group 0- Primescan-AI articulated. For the data acquisition of Groups 1, 2, 3, and 4, the right mandibular posterior teeth were removed sequentially. The same procedures were completed as in Group 0. A program (Geomagic Wrap) was selected to compute interlandmark measurements on the digitized articulated casts (control) and each articulated specimen. Two-way ANOVA and pairwise multiple comparison Tukey tests were used to analyze trueness (α=.05). The Levene and pairwise multiple comparison Wilcoxon rank tests were used to analyze precision (α=.05).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Trueness and precision discrepancies were found between the groups (P&lt;.001) and subgroups (P&lt;.001), with a significant interaction group×subgroup (P&lt;.001). Groups 0, 1, and 2 obtained the best trueness and precision, while Group 4 demonstrated the worst trueness and precision. Primescan and Aoralscan3 obtained better trueness than the i700. The AI-based program obtained lower MIP trueness and precision when compared with the IOSs tested. The AI-based program revealed the best MIP accuracy when articulating scans recorded by using the i700 and the worst with the Aoralscan3.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;Edentulous areas im","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Custom ocular prostheses incorporating braille for a patient with bilateral anophthalmia: A clinical report.","authors":"Bhavita Wadhwa, Sudhir Bhandari, Manisha Khanna, Sandeep Singh, Usha Singh","doi":"10.1016/j.prosdent.2024.11.015","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.11.015","url":null,"abstract":"<p><p>Bilateral anophthalmia, a clinical condition characterized by the absence of globe and ocular tissues from both the orbits, presents considerable challenges to a patient's daily routine and use of prostheses. The patient's inability to orientate custom ocular prostheses (COPs) 3-dimensionally is understandable, and they typically rely on caregivers to manage the prostheses and prevent inadvertent injury to the socket. This clinical report describes the successful integration of braille script into COPs as a solution to these challenges by improving prosthesis management, decreasing caregiver dependence, and encouraging independence.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of surface pre-treatment on bond strength between cement and zirconia: A systematic review and network meta-analysis.","authors":"Azita Mazaheri Tehrani, Majedeh Nami, Arash Zarbakhsh, Anahita Moscowchi, Ezatollah Jalalian","doi":"10.1016/j.prosdent.2024.12.014","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.014","url":null,"abstract":"<p><strong>Statement of problem: </strong>The optimal zirconia pretreatment, contingent upon the type of cement used, warrants further research.</p><p><strong>Purpose: </strong>The purpose of this investigation was to evaluate the influence of various surface pretreatments on the bonding efficacy of cement to zirconia.</p><p><strong>Material and methods: </strong>A comprehensive search was conducted across the PubMed, Embase, Scopus, and Web of Science databases for in vitro studies related to bonding with zirconia up to April 2024, supplemented by a manual search. A network meta-analysis was executed to compare different types of cement.</p><p><strong>Results: </strong>Of the 6118 articles screened, 21 were selected for inclusion in this review. These studies examined various surface pretreatment techniques, primers, resin cements, aging protocols, and bond strength testing methods. The highest bond strengths were observed with 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-based cements. The network meta-analysis indicated that mechanical and mechano-chemical pretreatments yielded superior results across all cement types.</p><p><strong>Conclusions: </strong>The existing evidence indicates that both surface pretreatments and the specific type of cement should be considered when interpreting the findings of in vitro studies for their application in clinical practice.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143007207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of rapid infrared radiation heating on the warping deformation and mechanical properties of selective laser melted Co-Cr dental alloy.","authors":"Yanan Zhou, Zhihao Liu, Huwei Du, Jie Jiang, Jianxin Li, Xiaoyu Ma, Yunchao Yi","doi":"10.1016/j.prosdent.2024.12.013","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.12.013","url":null,"abstract":"<p><strong>Statement of problem: </strong>Infrared radiation heating (IRH) technology has been innovatively applied to the annealing of selective laser melted (SLM) cobalt chromium (Co-Cr) frameworks. However, previous studies have not reported the effects of IRH on the warping deformation and mechanical properties of these frameworks.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to investigate the effects of IRH on the warping deformation and mechanical properties of dental SLM Co-Cr alloy and to evaluate its potential applications in dental restorations.</p><p><strong>Material and methods: </strong>Two types of specimens, bone-shaped tensile specimens and warping deformation specimens (cantilever beam structures), were fabricated by SLM, followed by annealing using IRH and general furnace heating (GFH). The specimens were divided into 4 groups (n=6) based on the applied heat treatment method and build direction (IRH-XY; IRH-Z; GFH-XY; GFH-Z). The cantilever beam support structure of the warping deformation specimen was cut using wire cutting, and the warping deformation was measured using a digital image correlation optical extensometer. Tensile tests were used to evaluate mechanical properties, with the fracture characteristics being observed using a scanning electron microscope (SEM). A micro-Vickers hardness tester was used to measure the microhardness. The microstructures were analyzed using a metallographic microscope. All data were analyzed using a 1-way ANOVA and the Tukey Honestly Significant Difference test (α=.05).</p><p><strong>Results: </strong>The surfaces of the SLM Co-Cr warping deformation specimens treated with IRH showed slight oxidation, while those treated with GFH exhibited a dark black appearance. No significant difference was found in deformation between the IRH group (0.412 ±0.039 mm) and the GFH group (0.379 ±0.070 mm) (P>.05). The elongation of the longitudinally built specimens was significantly higher than that of their transversely built counterparts (P<.05), while the yield strength showed an opposite trend. The longitudinally built specimens demonstrated ductile fracture characteristics, while the transversely built specimens displayed quasi-cleavage fractures. The specimens treated with IRH exhibited comparable tensile strength and microhardness with the GFH-treated specimens, with no statistically significant differences (P>.05). IRH treatment resulted in finer grains in the SLM Co-Cr alloy. Many fine second-phase particles precipitated from the matrix in the longitudinally built specimens, while few were observed in the transversely built specimens.</p><p><strong>Conclusions: </strong>The SLM Co-Cr specimens treated with IRH achieved comparable warping deformation and mechanical properties with those of the GFH-treated specimens. The IRH technology holds great potential for application to dental restorations.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}