Journal of Prosthetic Dentistry最新文献

{"title":"Comparison of implant placement and loading protocols for single anterior maxillary implants: A systematic review and network meta-analysis","authors":"Xinyi Qian DMD ,&nbsp;Boldizsár Vánkos DMD ,&nbsp;Kata Kelemen DMD ,&nbsp;Noémi Gede PhD ,&nbsp;Gábor Varga PhD ,&nbsp;Péter Hegyi MD, PhD ,&nbsp;Gábor Gerber DMD, PhD ,&nbsp;Péter Hermann DMD, PhD ,&nbsp;Árpád Joób-Fancsaly DMD, PhD ,&nbsp;Krisztina Mikulás DMD, PhD","doi":"10.1016/j.prosdent.2024.05.033","DOIUrl":"10.1016/j.prosdent.2024.05.033","url":null,"abstract":"<div><h3>Statement of problem</h3><div>With increasing esthetic needs, patients prefer missing anterior teeth to be restored as soon as possible, but how the timing of implantation and prosthetic loading influences peri-implant tissue and the esthetic results remains unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this systematic review and network meta-analysis of randomized controlled trials was to investigate and rank the hard-tissue and soft-tissue outcomes, esthetics, and patient satisfaction of single maxillary implant placement and loading protocols.</div></div><div><h3>Material and methods</h3><div>A systematic search was conducted to identify studies with at least a 1-year follow-up that compared different implant placement and loading protocols and reported on survival, marginal bone loss (MBL), soft tissue, and esthetics. A random effects model and a Bayesian approach were applied to compare protocols by using mean differences (MD) with 95% credible intervals (CrI) and surface under the cumulative ranking curve (SUCRA) values.</div></div><div><h3>Results</h3><div>A total of 43 articles were included, with a follow-up of 1 to 5 years. All protocols had high survival rates and no significant differences for 1-year or 2-year MBL. Immediate placement with immediate loading ranked first in pink and white esthetic scores and satisfaction and was statistically significantly better than immediate placement with delayed loading or late placement protocols in pink esthetic scores, where its advantage over late placement with late loading was also clinically relevant [MD: −1.74, CrI: −2.34 to −1.15].</div></div><div><h3>Conclusions</h3><div>Immediate implantation with immediate loading showed a considerable esthetic advantage over later rehabilitation, whereas only a slight difference in MBL resulted from different protocols.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 677-688"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141759389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using a smartphone three dimensional scanning application (Polycam) to three dimensionally print an ear cast: A technique","authors":"Ceyda Başak İnal DDS, PhD ,&nbsp;Merve Bankoğlu Güngör DDS, PhD ,&nbsp;Seçil Karakoca Nemli DDS, PhD","doi":"10.1016/j.prosdent.2023.04.026","DOIUrl":"10.1016/j.prosdent.2023.04.026","url":null,"abstract":"<div><div>This technique describes the use of a smartphone application for scanning an ear for 3-dimensional (3D) printing of an auricular prosthesis cast. The intact ear was scanned by using a smartphone and a 3D scan application (Polycam). The standard tessellation language (STL) file of the 3D data was used to produce a mirror image of the ear, which was sent to the 3D printing center where a resin cast was printed. This technique is harmless for the patient compared with radiological imaging methods, more comfortable, and cost-effective and is straightforward for the maxillofacial prosthodontist.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 926-928"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9924219","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":"Effect of chairside polishing systems on the surface roughness of different CAD-CAM denture base materials","authors":"Nareudee Limpuangthip DDS, PhD ,&nbsp;Sarita Apiromwijit DDS ,&nbsp;Prarom Salimee DDS, PhD","doi":"10.1016/j.prosdent.2024.11.011","DOIUrl":"10.1016/j.prosdent.2024.11.011","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Adjusting and polishing a denture base affects surface roughness and, consequently, microbial adhesion. Since various computer-aided design and computer-aided manufacturing (CAD-CAM) denture base materials are available, the efficiency of chairside polishing systems to achieve a proper surface roughness should be investigated.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to compare the surface roughness of milled and 3-dimensional (3D) printed denture base materials with that of heat-polymerized acrylic resin after the use of 2 different chairside polishing systems.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Heat-polymerized (control), milled, and 3D printed denture base materials were tested. Laboratory polished and unpolished denture bases served as positive and negative controls. Specimens were divided into 2 chairside silicone polishing systems (AcryPoint system and Exa technique). Surface roughness was measured before and after polishing. Surface morphology of the unpolished and polished specimens was observed via scanning electron microscopy. The surface hardness of unpolished specimens was measured using a Vickers hardness tester. Stress-strain behavior of the silicone matrix and abrasive filler size of each polisher was assessed. The effects of denture base materials and polishing systems on surface roughness and hardness were evaluated using 1-way, 2-way, and repeated measures analyses of variance (ANOVA) (α=.05), along with Weibull proportional hazards regression to assess the likelihood of achieving clinically acceptable surface roughness. The Spearman correlation assessed the relationship between the hardness of unpolished denture bases and final surface roughness.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;The surface roughness of all denture bases decreased with increased polishing duration, reaching a plateau after 60 seconds. For the heat-polymerized and milled dentures, the Exa technique consistently yielded lower roughness than the AcryPoint system (&lt;em&gt;P&lt;/em&gt;&lt;.001). Conversely, both polishing systems produced comparable surface roughness on the 3D printed denture base. The Vickers hardness of the unpolished milled denture was significantly higher than of the others (&lt;em&gt;P&lt;/em&gt;=.010). The stress-strain behavior of the polisher matrix revealed distinct characteristics between coarse or medium and fine polishers within each polishing system. The abrasive filler size of the AcryPoint coarse polisher was relatively larger than that of the Exa technique.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;Regardless of polishing protocols, the 3D printed denture base exhibited the highest surface roughness, followed by heat-polymerized and milled denture bases. The surface roughness of the polished denture was not related with the material hardness. For heat-polymerized and milled dentures, a chairside silicone polishing system can be used to attain a level of surface rou","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 891.e1-891.e8"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142791947","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":"Preorthodontic functional long-term trial restoration of a worn dentition for optimizing outcomes: A clinical report","authors":"Rami Albahri DDS, MMSc ,&nbsp;Chen-Hsing Lin DDS, MMSc ,&nbsp;Jason D. Lee DDS, MMSc ,&nbsp;Hani Tohme DDS, MSc, PhD ,&nbsp;Ghida Lawand BDS, MSc","doi":"10.1016/j.prosdent.2023.04.030","DOIUrl":"10.1016/j.prosdent.2023.04.030","url":null,"abstract":"<div><div><span>Orthodontic tooth movement is often required before restorative treatment to maximize the esthetic and functional outcomes. Diagnostic waxing is a crucial step before active treatment to validate the optimal tooth position for future restorations. In this clinical report, a bonded prototype of the diagnostic waxing was used to guide and facilitate </span>orthodontic treatment<span> with the definitive restorations mind. The orthodontic treatment created the required space between the teeth for the ceramic restorations, improved dental and facial features, and restored appropriate incisal guidance.</span></div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 644-648"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9622353","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":"The Essentials","authors":"","doi":"10.1016/S0022-3913(25)00166-0","DOIUrl":"10.1016/S0022-3913(25)00166-0","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Page A8"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593169","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":"Position of digitally guided implants in completely edentulous maxillae by using a modified double-scan and overlap of three digital surface protocol","authors":"Jorge Troncoso-Pazos DDS ,&nbsp;Pablo Matamala DDS ,&nbsp;María Francisca Jusari DDS ,&nbsp;Keila Risco DDS ,&nbsp;Felipe-Rodrigo Aguilera DDS, MSC ,&nbsp;Pedro Christian Aravena DDS, PhD","doi":"10.1016/j.prosdent.2023.03.028","DOIUrl":"10.1016/j.prosdent.2023.03.028","url":null,"abstract":"<div><h3>Statement of problem</h3><div><span>In patients with a completely edentulous maxilla, the variability in resilience and mucosal thickness and the lack of teeth and rigid supporting structures may lead to poor adaptation of the surgical guide and significant variation in the definitive implant position. Whether a modified double-scan technique with overlap of surfaces will improve </span>implant placement is unclear.</div></div><div><h3>Purpose</h3><div>The purpose of this prospective clinical study was to evaluate the 3-dimensional position and the correlation of 6 dental implants in participants with a completely edentulous maxilla using a mucosa-supported flapless surgical guide designed with 3 matched digital surfaces obtained with a modified double-scan protocol.</div></div><div><h3>Material and methods</h3><div>Dental implants were installed with an all-on-6 protocol in the edentulous maxilla of participants at the Santa Cruz Public Hospital, Chile. A stereolithographic mucosa-supported template<span> was fabricated from a cone beam computed tomography<span> (CBCT) scan made with a prosthesis with 8 radiopaque ceramic spheres inserted and by scanning the same prosthesis with an intraoral scanner<span>. The mucosa<span> was obtained by digitally casting the relining of the removable complete denture in the design software program. After 4 months, a second CBCT scan was obtained to evaluate the position of the installed implants measured at 3 locations: apical, coronal, platform depth, and angulation. Differences in position between the 6 implants in the completely edentulous maxilla and their linear correlation at the measured points were compared with the Kruskal-Wallis and Spearman correlation tests (α=.05).</span></span></span></span></div></div><div><h3>Results</h3><div><span>Sixty implants were installed in 10 participants (age 54.3 ±8.2 years; 7 women). The average deviation in the apical axis was 1.02 ±0.9 mm, coronal 0.76 ±0.74 mm, platform depth 0.92 ±0.8 mm, and the major axis angulation of the 6 implants was 2.92 ±3.65 degrees. The implant in the maxillary left lateral incisor region had the most significant deviation in apical and angular points (</span><em>P</em>&lt;.05). A linear correlation between apical-to-coronal deviations and apical-to-angular deviations was observed for all implants (<em>P</em>&lt;.05).</div></div><div><h3>Conclusions</h3><div><span>A stereolithographic mucosa-supported guide designed with the overlap of 3 digital surfaces had average dental implant position values similar to those reported by </span>systematic reviews and meta-analyses. In addition, implant position varied based on the location of the implant installation in the edentulous maxilla.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 780-789"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9470140","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":"Retentive force variations in three polyamide and a polyetheretherketone denture attachments for implant-supported overdentures: An in vitro study","authors":"Maria Βei DDS ,&nbsp;Savvas N. Kamalakidis DDS, PhD ,&nbsp;Argirios L. Pissiotis DDS, MS, PhD ,&nbsp;Konstantinos Michalakis DDS, MSc, PhD ,&nbsp;Olga Naka DDS, MClinDent, PhD","doi":"10.1016/j.prosdent.2023.04.019","DOIUrl":"10.1016/j.prosdent.2023.04.019","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The loss in the retentive capability of implant-supported overdenture attachments has been related to the wear of the retentive inserts. Wear of the abutment coating material when following the replacement period for the retentive inserts requires investigation.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to compare the changes in retentive force of 3 polyamide&lt;span&gt; and a polyetheretherketone denture attachments under repeated insertion and removal cycles in wet conditions while following their manufacturers’ replacement time recommendations.&lt;/span&gt;&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Four different denture attachments (LOCKiT, OT-Equator, Ball attachment, and Novaloc) with their retentive inserts were tested. Four implants were embedded into individual acrylic resin blocks, and 10 abutments for each attachment were used. Forty metal housings with their retentive inserts were attached to polyamide screws with autopolymerizing acrylic resin. A customized universal testing machine was used to simulate insertion and removal cycles. The specimens were mounted on a second universal testing machine at 0, 540, 2700, and 5400 cycles, and the maximum retentive force was recorded. The retentive inserts for LOCKiT (light retention), OT-Equator (soft retention), and Ball attachment (soft retention) were replaced every 540 cycles, while the Novaloc (medium retention) attachments were never replaced. All the abutments were weighed with a precision scale at 0, 2700, and 5400 cycles. The surface of every abutment was examined under a stereomicroscope at ×10 magnification. Data were analyzed with descriptive statistics. Two-way repeated measures ANOVA was used to compare the mean retentive force and mean abutment mass of all groups and time evaluation points. Bonferroni corrections were made to adjust for multiple tests (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;The mean retention loss for LOCKiT was 12.6% after 6 months and 45.0% after 5 years of simulated use. The mean retention loss for OT-Equator was 16.0% after 6 months and 50.1% after 5 years of simulated use. The mean retention loss for Ball attachment was 15.3% after 6 months and 39.1% after 5 years of simulated use. The mean retention loss for Novaloc was 31.0% after 6 months and 59.1% after 5 years of simulated use. The mean abutment mass difference was statistically significant (&lt;em&gt;P&lt;/em&gt;&lt;.05) for LOCKiT and Ball attachment but not statistically significant (&lt;em&gt;P&lt;/em&gt;&gt;.05) for OT-Equator and Novaloc at baseline, 2.5 years, and 5 years.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;All tested attachments recorded retention loss under the experimental conditions, even when their manufacturers’ recommendations for replacement time for the retentive inserts were followed. Patients should be aware that implant abutments should be replaced after a recommended period since their surfaces also change over time.&lt;/div&gt;&lt;/d","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 838-843"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9882146","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":"FitJaw Mobile, a virtual reality device applied to dentistry: An analysis based on two patient treatments","authors":"Gema Arroyo-Cruz DMD, PhD ,&nbsp;Ana Orozco-Varo DMD, PhD ,&nbsp;Pablo Domínguez-Cardoso DMD ,&nbsp;Ana Belén Árbol-Carrero DMD ,&nbsp;Emilio Jiménez-Castellanos MD, DDS, PhD","doi":"10.1016/j.prosdent.2023.04.018","DOIUrl":"10.1016/j.prosdent.2023.04.018","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Virtual reality (VR) has improved significantly in the last decade and has been applied to different fields, including medicine, dentistry, and physiotherapy. VR has been used for the innovative treatment of painful conditions, especially when traditional exercise therapies<span> were unsuccessful because of patient noncompliance.</span></div></div><div><h3>Purpose</h3><div>The purpose of this study was to analyze the use of VR as an aid when using exercises to manage temporomandibular disorders (TMDs).</div></div><div><h3>Material and methods</h3><div><span>Two White women diagnosed with TMDs of muscular origin (one with muscular pain and the other with reduced mouth opening) were referred to the Department of Prosthodontics of the University of Seville, where they were enrolled in an exercise program using the VR software program FitJaw Mobile. Both had been treated the previous year with an </span>occlusal device for TMD of muscular origin, but their symptoms had not improved.</div></div><div><h3>Results</h3><div>For both patients, the functional movement limitation and the chronic pain improved noticeably.</div></div><div><h3>Conclusions</h3><div>The use of VR when doing jaw exercises can improve outcomes and compliance.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 805-810"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9879416","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 fabrication method on the manufacturing accuracy and internal discrepancy of removable partial dentures: A systematic review and meta-analysis","authors":"Rata Rokhshad DDS ,&nbsp;Azita Mazaheri Tehrani DDS, MSD ,&nbsp;Arash Zarbakhsh DDS, MSD ,&nbsp;Marta Revilla-León DDS, MSD, PhD","doi":"10.1016/j.prosdent.2023.04.004","DOIUrl":"10.1016/j.prosdent.2023.04.004","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Removable partial dentures (RPDs) can be fabricated with conventional casting procedures or computer-aided design and computer-aided manufacturing (CAD-CAM) technologies; however, the manufacturing accuracy and internal discrepancy differences among these manufacturing methods remain uncertain.</div></div><div><h3>Purpose</h3><div>The purpose of this systematic review and meta-analysis was to assess the influence of the fabricating method (casting, milling, or additive manufacturing) on the accuracy and internal discrepancy of RPDs.</div></div><div><h3>Material and methods</h3><div>An electronic search of the literature was performed in 6 databases: PubMed/Medline, Embase, Web of Science, Scopus, Cochrane, and Google Scholar. The studies that assessed the accuracy and internal discrepancy of RPDs fabricated from casting, milling, and additive manufacturing were included. Studies reporting gaps (mean) and standard deviations were included in the meta-analysis. Publication bias was identified using funnel plot asymmetry and the Egger test.</div></div><div><h3>Results</h3><div><span>A total of 25 articles were included. The internal discrepancy of the additively manufactured RPDs ranged from 14.4 to 511 μm and from 7 to 419 μm in conventionally fabricated RPDs. For the milling method, 20 to 66 μm horizontal and 17 to 59 μm vertical discrepancies were reported. The Egger tests indicated no publication bias among the studies that were included in the meta-analysis. Four included studies resulted in more than the acceptable clinical gap (311 μm) for the CAD-CAM method. Independently of the manufacturing method, the greatest internal discrepancies reported were observed under the major connectors. RPDs fabricated by using CAD-CAM techniques required fewer clinical appointments, the RPD design was easier to reproduce, and laboratory time was less than with conventional procedures. However, the reviewed studies described several disadvantages, including limited RPD design programs, difficulties in defining the </span>occlusal plane, expensive materials, and increased laboratory cost.</div></div><div><h3>Conclusions</h3><div>Additive and subtractive technologies provide accurate methods for RPD fabrication; however, all challenges, including limited design software programs have not yet been overcome, and casting is still needed when the framework pattern is milled or printed.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 724-735"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9843148","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":"Trueness and intaglio fit of custom-made polyetheretherketone post-and-cores fabricated using different techniques","authors":"Dina Bassiouny MSc ,&nbsp;Sandra Petersmann PhD ,&nbsp;Maged Zohdy PhD ,&nbsp;Tarek Morsi PhD ,&nbsp;Doaa Taha PhD","doi":"10.1016/j.prosdent.2024.06.026","DOIUrl":"10.1016/j.prosdent.2024.06.026","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Applications of polyetheretherketone (PEEK) as a promising alternative to ceramic materials have extended to include post-and-cores. However, information regarding the available fabrication techniques for producing custom-made PEEK post-and-cores and their effect on accuracy is still scarce.</div></div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to evaluate the trueness and intaglio fit of custom-made PEEK post-and-cores fabricated using different techniques.</div></div><div><h3>Material and methods</h3><div>Ten mandibular second premolars were collected, decoronated, and endodontically treated. For the fabrication of custom-made post-and-cores, each post space was prepared, scanned, and designed by using the exocad software program. Each reference design was used to fabricate PEEK post-and-cores with 3 different techniques (N=30): group P, heat pressing; group S, subtractive manufacturing, and group A, additive manufacturing. All the fabricated restorations were scanned, providing the test data as standard tessellation language (STL) files, which were imported with the reference data into a reverse engineering software program to evaluate the 3D trueness of each fabrication technique. To evaluate the intaglio fit, restorations coated with silicone material were scanned to provide the test data as STL files, which were superimposed on the STL files of the scanned restorations. One-way analysis of variance (ANOVA) and 2-way mixed model ANOVA tests were used to analyze the data (α=.05).</div></div><div><h3>Results</h3><div>For 3D trueness, root mean square (RMS) values representing the deviations between the scans of the fabricated restorations and the reference designs varied significantly among different groups (<em>P</em>&lt;.001), with the highest mean deviation found in group A (102.8 ±31 µm), while the lowest mean deviation was found in group S (42.2 ±11 µm). For the intaglio fit, the deviations between the scans of the fabricated restorations and the scans of the coated restorations varied significantly among different groups (<em>P</em>&lt;.001), with the highest mean deviation found in group A (228.4 ±47 µm), while the lowest mean deviation was found in group S (96.2 ±14 µm). Simple effects comparisons showed the highest value of deviation in the apical area in group A (<em>P</em>&lt;.001).</div></div><div><h3>Conclusions</h3><div>Custom-made PEEK post-and-cores fabricated by using subtractive manufacturing and heat pressing techniques showed better trueness and intaglio fit compared with additively manufactured restorations. Before printed PEEK restorations can be considered a suitable alternative to pressed or milled ones, improvements are required to confirm their reliability.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"133 3","pages":"Pages 811-819"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875162","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}