Journal of Prosthetic Dentistry最新文献

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Time efficiency and precision of splinted complete arch implant scanning.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-13 DOI: 10.1016/j.prosdent.2025.02.017
Aly Abdelrehim, Eshamsul Bin Sulaiman, Hazrina Sofian, Nosizana Mohd Salleh
{"title":"Time efficiency and precision of splinted complete arch implant scanning.","authors":"Aly Abdelrehim, Eshamsul Bin Sulaiman, Hazrina Sofian, Nosizana Mohd Salleh","doi":"10.1016/j.prosdent.2025.02.017","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.017","url":null,"abstract":"<p><strong>Statement of problem: </strong>The precision and accuracy of intraoral scanners for complete arch implant scanning is questionable as it is affected by the absence of anatomic features, the presence of large homogenous areas, and the lack of clear reference points, all of which create inherent errors in the image stitching process by the scanner software program.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to test a newly designed scan-aid apparatus for evaluating the effect of geometric heterogeneity and additional reference points on the time efficiency and scanning precision of complete arch implant scanning.</p><p><strong>Material and methods: </strong>A total of 60 scans (20 per group) were performed using an intraoral scanner in 3 different clinical simulations: 2 parallel implants, 4 parallel implants, and 4 implants; 2 anterior implants in parallel axial orientation; and 2 distal implants with a 30-degree posterior inclination. The scanning procedure was alternated between scanning with the scan-aid apparatus (test groups; 4IP+, 4IA+, 2IP+) and without (control groups; 4IP-, 4IA-, 2IP-). A 3-dimensional (3D) inspection software program was used to assess scan precision. Test group scans were compared with a reference scan for repeatability, with and without the scan-aid apparatus. One scan per group was the reference; the others were superimposed by using a best-fit algorithm. The 3D standard deviations were recorded for repeatability analysis. To assess time efficiency, the total scanning time, actual scanning time, and time lost were measured. A paired t test was used to compare means between the groups (α=.05).</p><p><strong>Results: </strong>Precision was significantly higher in the test groups using the scan-aid apparatus than in the control groups (P<.05). Furthermore, scanning with the scan-aid apparatus was significantly more time efficient (P<.05).</p><p><strong>Conclusions: </strong>Additional reference points and geometric heterogeneity using a scan-aid apparatus significantly improved the precision and time efficiency of complete arch implant scanning.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143630502","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}
引用次数: 0
Influence of different airborne-particle abrasion pressures, cleaning methods, and artificial aging on zirconia ceramic bonding.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-12 DOI: 10.1016/j.prosdent.2025.02.014
Lisa Türp, Frank Lehmann, Sebastian Wille, Matthias Kern
{"title":"Influence of different airborne-particle abrasion pressures, cleaning methods, and artificial aging on zirconia ceramic bonding.","authors":"Lisa Türp, Frank Lehmann, Sebastian Wille, Matthias Kern","doi":"10.1016/j.prosdent.2025.02.014","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.014","url":null,"abstract":"<p><strong>Statement of problem: </strong>Airborne-particle abrasion (APA) with alumina combined with a primer or luting resin containing a phosphate monomer has been well established for resin bonding to zirconia. However, a standardized method for bonding to zirconia is unavailable, as some factors including the optimal pressure of airborne-particle abrasion, the cleaning method, and the luting resin system are still unclear because of the limited available data.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the influence of different airborne-particle abrasion pressures and different cleaning methods of zirconia on the tensile bond strength (TBS) of 2 luting resins system containing methylacryloyloxydecyl-dihydrogenphosphate (MDP) either in the primer or in the luting resin.</p><p><strong>Material and methods: </strong>A total of 128 disk specimens were milled from zirconia blocks and divided into groups according to the pressure of airborne-particle abrasion of either 0.1 MPa or 0.25 MPa (n=64). The specimens were then divided into 2 subgroups and were either cleaned in an ultrasonic device in isopropanol or with oil-free air stream (n=32). The subgroups were further divided according to the luting resin (n=16) and the bonding surfaces were perpendicularly luted to the acrylic resin tubes filled with a composite resin (Clearfil F II) with either an MDP-containing primer and a luting resin or with a self-adhesive MDP-containing luting resin. Each of the 8 groups was further divided into 2 subgroups (n=8) with either 3-days water storage at 37 °C or 150-days water storage with additional thermal cycling (37 500 thermal cycles between 5 °C and 55 °C) for artificial aging. The TBS was evaluated with a universal testing machine. All specimens underwent failure mode analysis. Statistical analysis was performed with 4-way ANOVA and, if required, with 3-way ANOVA (α=.05).</p><p><strong>Results: </strong>The mean ±standard deviations ranged from 57.0 ±11.1 MPa to 61.5 ±7.1 MPa after 3 days and from 32.3 ±11.7 MPa to 61.0 ±12.4 MPa after 150 days. The pressure of airborne-particle abrasion and the cleaning method had no significant effect on the TBS (P>.05), whereas the luting resin and artificial aging significantly influenced the TBS (P<.05).</p><p><strong>Conclusions: </strong>Irrespective of the pressure of airborne-particle abrasion and the cleaning method, the use of an MDP-containing luting resin for bonding to zirconia was found to be more advantageous compared with an MDP-containing primer and luting resin because of higher bond strength and no significant decrease after artificial aging.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625007","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}
引用次数: 0
A completely digital workflow for an anterior repositioning device.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-12 DOI: 10.1016/j.prosdent.2025.02.029
Nguyen Thu Tra, Nguyen Viet Anh, Nguyen Minh Duc
{"title":"A completely digital workflow for an anterior repositioning device.","authors":"Nguyen Thu Tra, Nguyen Viet Anh, Nguyen Minh Duc","doi":"10.1016/j.prosdent.2025.02.029","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.029","url":null,"abstract":"<p><p>An anterior repositioning device is an occlusal device that has been commonly used to treat temporomandibular joint pain associated with internal joint derangement. The functional component of the device is a ramp that guides the mandible along its habitual arc of closure and then directs it to slide forward into the required position. Traditionally, impressions could not capture the closing path, leading to significant chair time during appliance insertion, as the ramp had to be manually adjusted. The present technique fully utilizes digital scans, including the recording of the closing path, to minimize chair time during appliance insertion.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625068","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}
引用次数: 0
A complete digital approach for the functional and esthetic rehabilitation of reconstructed jaws with microvascularized bone and extraoral skin grafts: A dental technique.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-12 DOI: 10.1016/j.prosdent.2025.02.031
Vittorio Moraschini, Daniel Costa Ferreira de Almeida, Suelen Cristina Sartoretto, Rafael Seabra Louro
{"title":"A complete digital approach for the functional and esthetic rehabilitation of reconstructed jaws with microvascularized bone and extraoral skin grafts: A dental technique.","authors":"Vittorio Moraschini, Daniel Costa Ferreira de Almeida, Suelen Cristina Sartoretto, Rafael Seabra Louro","doi":"10.1016/j.prosdent.2025.02.031","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.031","url":null,"abstract":"<p><p>The oral rehabilitation of patients with microvascularized bone and extraoral skin grafts is a clinical challenge. The integration of these procedures with digital technologies has increased the treatment accuracy, minimizing the risk associated with anatomical variations, and improving esthetic and functional outcomes. This article presents a reproducible and completely digital approach for the functional and esthetic rehabilitation of reconstructed jaws with microvascularized bone and extraoral skin grafts.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625064","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}
引用次数: 0
A straightforward method to record the peak torque value when using a cantilever spring mechanical torque limiting device.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-12 DOI: 10.1016/j.prosdent.2025.02.021
Chandur Pk Wadhwani, Kwok Hung Chung
{"title":"A straightforward method to record the peak torque value when using a cantilever spring mechanical torque limiting device.","authors":"Chandur Pk Wadhwani, Kwok Hung Chung","doi":"10.1016/j.prosdent.2025.02.021","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.021","url":null,"abstract":"<p><p>Implant cantilever beam torque limiting devices suffer from two prominant issues. 1. They do not record the peak torque applied. 2. They suffer from viewing angle parallax. A simple, inexpensive device, placed between the measurement reader arms of th instrument that can resolve these issues is described.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625072","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}
引用次数: 0
Influence of an artificial intelligence-based application on the accuracy of complete arch implant scans recorded by using an intraoral scanner.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-12 DOI: 10.1016/j.prosdent.2025.02.010
Marta Revilla-León, Rocio Cascos, Abdul B Barmak, John C Kois, Miguel Gómez-Polo
{"title":"Influence of an artificial intelligence-based application on the accuracy of complete arch implant scans recorded by using an intraoral scanner.","authors":"Marta Revilla-León, Rocio Cascos, Abdul B Barmak, John C Kois, Miguel Gómez-Polo","doi":"10.1016/j.prosdent.2025.02.010","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.010","url":null,"abstract":"<p><strong>Statement of problem: </strong>Artificial intelligence (AI)-based applications have been integrated into intraoral scanner (IOS) programs aiming to assist the digitizing procedure, including the automatic alignment of the computer-aided design (CAD) file of the selected implant scan body (ISB). However, the impact of this AI-based application on the accuracy of complete arch implant scans remains unknown.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to assess the impact of an AI-based application on the accuracy of complete arch implant scans recorded by using an IOS.</p><p><strong>Material and methods: </strong>A maxillary edentulous stone cast with 6 implant abutment analogs (MultiUnit Abutment Plus Replica) was obtained. Three groups were created based on the technique used to record complete arch implant scans by using an IOS (i700): prescan with the posterior ISB scan activating (Pre-AI group) or disabling the AI-based application (Pre-NoAI group) or obtaining a complete arch implant scan without prescan (NoPre group) (n=10). A complete arch scan involving the implant abutments was obtained (prescan) and duplicated 20 times. Then, an ISB (Elos Accurate IO 2C-A) was hand tightened into each implant abutment analog. In the Pre-AI group, for each duplicated prescan, each ISB was scanned until each scanned ISB was automatically aligned with the CAD file by the AI-based program. In the Pre-NoAI group, for each duplicated prescan, the ISBs were digitized to obtain the experimental complete arch implant scans. In the NoPre group, a complete arch implant scan was obtained. Lastly, a laboratory scan (reference scan) was obtained (T710). For each scan, an implant-supported bar was designed by using a program (DentalCAD). The bar designs were imported into another program (Geomagic), and linear and angular measurements among the implants were made. The measurements obtained in the control scan were used as a reference to measure the scanning distortion of each specimen. A 1-way Welch ANOVA test followed by the post hoc pairwise multiple comparison Tukey test was used to analyze trueness (α=.05). The Levene test was used to analyze precision (α=.05).</p><p><strong>Results: </strong>Significant linear (P<.001) trueness discrepancies were found among the groups. The Pre-AI group obtained significantly worse linear trueness than the other 2 groups. Additionally, significant angular trueness (P<.001) and precision (P<.001) discrepancies were revealed among the groups. The Pre-AI group obtained significantly worse angular trueness and precision than the other groups tested.</p><p><strong>Conclusions: </strong>The implant scanning technique impacted the 3-dimensional implant positions recorded by using the IOS tested.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143625076","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}
引用次数: 0
Capturing complete arch implant positions in two partial photogrammetry scans: Does it impact the accuracy of complete arch implant scans?
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-11 DOI: 10.1016/j.prosdent.2025.02.024
Marta Revilla-León, Abdul B Barmak, Michael Drone, John C Kois, Jorge Alonso Pérez-Barquero
{"title":"Capturing complete arch implant positions in two partial photogrammetry scans: Does it impact the accuracy of complete arch implant scans?","authors":"Marta Revilla-León, Abdul B Barmak, Michael Drone, John C Kois, Jorge Alonso Pérez-Barquero","doi":"10.1016/j.prosdent.2025.02.024","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.024","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Statement of problem: &lt;/strong&gt;Extraoral photogrammetry (PG) systems can record implant positions in 1 scan or in 2 scans that are then merged. However, the accuracy of implant positions recorded in 2 partial photogrammetry scans is unknown.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Purpose: &lt;/strong&gt;The purpose of this in vitro study was to compare the accuracy of complete arch implant scans recorded in 1 or 2 scans by using 3 extraoral PG systems.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Material and methods: &lt;/strong&gt;An edentulous cast with 6 implant abutment analogs (MultiUnit Abutment Plus Replica) was digitized (T710). Two groups were developed depending on the number of scans recorded to capture the 6 implant positions: 1 or 2 scans (n=30). Additionally, 3 subgroups were created based on the PG used: Icam4D, Grammee, OxoFit. In the 1-scan group, the corresponding markers of each system were placed on the implant abutment analogs of the cast. On each specimen, a scan was recorded to capture the 6 implant positions. In the 2-scan group, the corresponding markers of each system were hand tightened on the implant abutment analogs located on the right and left first molars and right and left lateral incisors. The first PG scan was obtained to capture these 4 implant positions. Afterwards, the markers of the right and left lateral incisors were removed and hand tightened on the implant abutment analogs positioned on the right and left first premolars. Lastly, the second PG scan was obtained to capture these 4 implant positions. In the ICam4D and Grammee subgroups, the partial scans were merged by the PG software program. In the OxoFit subgroup, the partial PG scans were merged by using a program (DentalCAD). Linear and angular measurements among the implants were completed on the digitized cast and used to compare the discrepancies with the same measurements acquired on each specimen. Two-way ANOVA and Tukey tests were used to analyze the trueness data. The Levene test was used to analyze the precision values (α=.05).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Linear trueness differences were found among the groups (P=.048) and subgroups (P&lt;.001). The 1-scan group achieved the best linear trueness (P=.048). The Icam4D obtained the best linear trueness. Linear precision differences were found among subgroups (P=.018). Icam4D had the best linear precision. Angular trueness differences were found among the groups (P=.022) and subgroups (P&lt;.001) with a significant group×subgroup interaction (P&lt;.001). The 1-scan group obtained better angular trueness than the 2-scan group. The Icam4D and OxoFit obtained the best angular trueness. Angular precision discrepancies were found among the groups (P&lt;.001) and subgroups (P&lt;.001) tested. The 1-scan group had the best angular precision. The Icam4D and OxoFit obtained the best angular precision.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;The number of scans and extraoral PG system impacted the implant position's accuracy of complete arch implant scans. The discrepancies me","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143615828","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}
引用次数: 0
Wear behavior of CAD-CAM zirconia, ceramic, and 3D printed nano-hybrid resin crowns for the restoration of primary and permanent molars: An in vitro study.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-11 DOI: 10.1016/j.prosdent.2025.02.040
Behrang Ghabchi, Fırat Mavi, Erhan Çömlekoğlu, Ibrahim Etem Saklakoğlu, Ilhan Uzel
{"title":"Wear behavior of CAD-CAM zirconia, ceramic, and 3D printed nano-hybrid resin crowns for the restoration of primary and permanent molars: An in vitro study.","authors":"Behrang Ghabchi, Fırat Mavi, Erhan Çömlekoğlu, Ibrahim Etem Saklakoğlu, Ilhan Uzel","doi":"10.1016/j.prosdent.2025.02.040","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.040","url":null,"abstract":"<p><strong>Statement of problem: </strong>Early childhood caries is one the world's most common problems in infants and treatment of posterior teeth with esthetic crowns in a low rate of wear on opposite dentition is a challenge for pediatric dentists.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the wear behavior of the tooth colored crown materials and the opposing teeth in using different esthetic crown materials in the mixed dentition period.</p><p><strong>Material and methods: </strong>The following tooth type and crown materials were considered in the experiment. Primary molars consist of first and second molars that were close to exfoliation or needed to be extracted because of orthodontic treatment and were caries free and with no restorations. Permanent teeth consisted of third molars that were caries free and with no restorations. Three different types of crown materials were used: nano-hybrid resin (VarseoSmile Crown <sup>plus</sup>; Bego GmbH), tetragonal zirconia polycrystalline stabilized with 3 mol% yttria (G-CERAM; Atlas Enta), and lithium disilicate glass-ceramic (IPS e.max CAD; Ivoclar AG). The wear test was performed in an artificial saliva environment (pH=6.7), based on the pin-on-plate technique, for a 2-mm stroke, under a compressive force of 30-N, at a frequency of 2-Hz and with 10 000, 20 000, and 30 000 cycles. A multi-way ANOVA statistical method was used (α=.05).</p><p><strong>Results: </strong>Wear of the opposing teeth by the glass-ceramic was greater than by the nano-hybrid resin or zirconia materials (P<.05). All 3 crown materials wore primary teeth more than permanent teeth (P<.05). Compared with nano-hybrid resin, zirconia led to more wear of the opposing tooth (P<.05). The wear behavior of the nano-hybrid resin was more predictable compared with the other 2 materials.</p><p><strong>Conclusions: </strong>Zirconia and lithium disilicate-based glass-ceramic materials caused more wear on both primary and permanent teeth compared with nano-hybrid materials, yet exhibited less wear themselves when opposed by primary or permanent teeth.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143615844","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}
引用次数: 0
Effect of print layer thickness and finishing and polishing protocols on the flexural strength, cell adhesion, and surface properties of a 3D printed resin.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-10 DOI: 10.1016/j.prosdent.2025.02.037
Fernanda Gurgel de Gois Moreira, Anne Heloyse Teixeira Crispim, João Vitor do Nascimento Santos, Maria Heloisa de Souza Borges Grisi, Amanda Maria de Oliveira Dal Piva, Leopoldina de Fátima Dantas de Almeida, Rodrigo Othávio de Assunção E Souza
{"title":"Effect of print layer thickness and finishing and polishing protocols on the flexural strength, cell adhesion, and surface properties of a 3D printed resin.","authors":"Fernanda Gurgel de Gois Moreira, Anne Heloyse Teixeira Crispim, João Vitor do Nascimento Santos, Maria Heloisa de Souza Borges Grisi, Amanda Maria de Oliveira Dal Piva, Leopoldina de Fátima Dantas de Almeida, Rodrigo Othávio de Assunção E Souza","doi":"10.1016/j.prosdent.2025.02.037","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.037","url":null,"abstract":"<p><strong>Statement of problem: </strong>Evidence regarding standardization of finishing and polishing protocols for 3-dimensionally (3D) printed interim resins is sparse.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the influence of print layer thickness and aging on the flexural strength, cell adhesion, and surface roughness of a 3D printed resin for interim crowns submitted to different finishing and polishing protocols.</p><p><strong>Material and methods: </strong>A total of 150 bars were printed (Flash Forge Foto 6.0), (25×2×2 mm) following the International Organization for Standardization (ISO) 4049 standard and divided into 10 groups (n=15) based on the print layer thickness (25 µm or 50 µm) and finishing and polishing protocols (FP) (C: control - no treatment; T: tungsten carbide bur; TG: T + glaze; TP: T + rubber polisher; and TPG: T + P + glaze). All specimens were then stored in distilled water at 37 °C for 180 days. The specimens were then subjected to a flexural strength test (980.6 N; 1 mm/minute). Weibull analysis, surface scanning electron microscopy (SEM), optical profilometry, and microbial adhesion analysis using Candida albicans were also performed. Data for σ (MPa) and roughness (µm) were analyzed using 2-way ANOVA followed by the Tukey post hoc test (α=.05). Data for microbial adhesion analysis were evaluated using the Kruskal-Wallis test.</p><p><strong>Results: </strong>For σ, the ANOVA revealed that the interaction between the factors was not significant (P=.088), however, factors the FP and print layer thickness were significant (P<.001). The groups 25 _C (99.58 MPa) and 50 _C (97.52 MPa) presented the highest σ, which were higher (P<.05) than T_25 (70.68 MPa) and T_50 (67.09 MPa), that showed the lowest strength among the experimental groups. For roughness, T_50 (0.068 ±0.030 µm) and T_25 (0.076 ±0.073 µm) groups obtained the highest average roughness, that were different between them (P<.05). Moreover, microbial adhesion analysis found that surface polishing procedures did not significantly affect microbial adhesion (P>.05).</p><p><strong>Conclusions: </strong>The print layer thickness of 25 µm and the glaze application after finishing are recommended to increase the material's strength and reduce roughness surface. In addition, after finishing with tungsten carbide drills, a glaze layer is indicated. Microbial adhesion was not influenced by the factors studied.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143604907","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}
引用次数: 0
Dysphagia progression and related factors in community-dwelling care-dependent patients through home-visit dental care: A 12-month retrospective cohort study.
IF 4.3 2区 医学
Journal of Prosthetic Dentistry Pub Date : 2025-03-08 DOI: 10.1016/j.prosdent.2025.02.006
Kohei Yamaguchi, Sayaka Komori, Ryosuke Yanagida, Yuki Yoshimatsu, Kanako Yoshimi, Kazuharu Nakagawa, Haruka Tohara
{"title":"Dysphagia progression and related factors in community-dwelling care-dependent patients through home-visit dental care: A 12-month retrospective cohort study.","authors":"Kohei Yamaguchi, Sayaka Komori, Ryosuke Yanagida, Yuki Yoshimatsu, Kanako Yoshimi, Kazuharu Nakagawa, Haruka Tohara","doi":"10.1016/j.prosdent.2025.02.006","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.006","url":null,"abstract":"<p><strong>Statement of problem: </strong>Reports on the progress and characteristics of patients with dysphagia who require professional care at home or in a nursing home are sparse.</p><p><strong>Purpose: </strong>The purpose of this 12-month retrospective cohort study was to investigate the characteristics of care-dependent patients with dysphagia in the community and the factors related to oral intake scale outcomes over 12 months of dysphagia rehabilitation through home-visit dental care.</p><p><strong>Material and methods: </strong>A total of 323 participants receiving care at home or in a nursing facility who underwent dysphagia rehabilitation through home-visit dental care were enrolled. The outcome was the Functional Oral Intake Scale (FOIS) score at baseline and after 6 and 12 months of rehabilitation. Multivariable linear regression analysis was used to explore the factors associated with FOIS scores before and after dysphagia rehabilitation (α=.05).</p><p><strong>Results: </strong>Approximately 90% of the participants had maintained or improved FOIS scores after 12 months. A difference in associated factors was observed between FOIS scores at baseline and after rehabilitation. Aspiration pneumonia history (B=-1.040, P<.001) and residential environment (B=-0.489, P=.035) were significantly linked to baseline FOIS scores but were not significant predictors of FOIS scores after 6 months (P>.05).</p><p><strong>Conclusions: </strong>The findings demonstrate that FOIS scores improved in the community with 12-month dysphagia rehabilitation, although the rehabilitation was affected by the overall condition. This underscores the importance of accessible and tailored community-based services for those dependent on care services.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143586028","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}
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