Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry最新文献

{"title":"Mechanical behavior and weight reduction of titanium frameworks with topology-optimized lattice structures for implant-supported prostheses.","authors":"Safa Ozden, Muhammed Esad Kayacan, Farhad Salmanpour, Hasan Camci, Bekir Yalcin","doi":"10.1111/jopr.70259","DOIUrl":"https://doi.org/10.1111/jopr.70259","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to investigate the mechanical behavior of titanium frameworks with triply periodic minimal surface (TPMS) lattice structures designed for additive manufacturing by topology optimization for complete arch implant-supported fixed dental prostheses.</p><p><strong>Materials and methods: </strong>A maxillary model supported by four implants (two posteriorly tilted and two anterior parallel) was virtually modeled using a dental computer-aided design program. Titanium frameworks for complete arch implant-supported fixed dental prostheses, which incorporated three distinct TPMS lattice structures (Schwarz, Diamond, and Lidinoid) with variable cell wall thicknesses, were designed using topology optimization software. A total of 36 optimized framework designs were analyzed by finite element analysis under vertical and oblique loading (200 N) at the canine, premolar, and molar (cantilever) regions. A solid, non-optimized titanium framework was the control group. von Mises stress (MPa), maximum displacement (µm), reaction forces (N), and weight reduction ratios (%) were analyzed. Statistical analyses were performed with ANOVA and Tukey's post hoc test (α = 0.05).</p><p><strong>Results: </strong>All topology-optimized frameworks achieved >30% weight reduction, with the Diamond lattice structure demonstrating the highest reduction of 39.92 ± 2.60 (p < 0.001). Although optimized frameworks exhibited higher displacement and stress values than solid controls because of increased flexibility, the peak stress values (190-210 MPa) remained significantly below the yield strength of titanium. Optimized frameworks generated significantly lower reaction forces than solid controls under canine and premolar loading, indicating an energy-absorbing effect.</p><p><strong>Conclusions: </strong>Topology optimization created a semi-rigid framework that incorporates the shock-absorbing benefits of polymers while maintaining the inherent fracture resistance of metallic alloys. Topology-optimized titanium frameworks provide a clinically viable solution for reducing prosthetic weight and minimizing reaction forces at the abutment interface, particularly in complete-arch rehabilitations.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149197385","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":"Clinical evaluation of porcelain-veneered zirconia crowns with 3D-printed textured cores: A preliminary randomized clinical trial.","authors":"Mengwei Wang, Jiabao Liu, Boxuan Xu, Wei-Shao Lin, Jianguo Tan, Li Chen","doi":"10.1111/jopr.70260","DOIUrl":"https://doi.org/10.1111/jopr.70260","url":null,"abstract":"<p><strong>Purpose: </strong>Porcelain-veneered zirconia crowns (PVZCs) provide the opacity required to mask discolored substrates and translucency needed for a natural appearance. Although in vitro studies have demonstrated that three‑dimensionally (3D)‑printed textures on zirconia cores can strengthen the zirconia-porcelain bond and thereby may reduce chipping incidence of PVZCs, their clinical performance remains to be verified. The purpose of this randomized clinical trial was to preliminarily investigate the influence of 3D-printed textures of zirconia cores on the clinical performance of PVZCs, particularly the influence on esthetic properties.</p><p><strong>Materials and methods: </strong>Sixteen participants requiring PVZCs for anterior tooth defects to mask severely discolored abutment teeth or metal post-and-core restorations were randomly allocated to two groups (eight participants per group). All zirconia cores were 3D-printed using advanced customized jetting (ACJ) technology and veneered with feldspathic porcelain. Cores in the experimental group were fabricated with 200 µm high textures on the veneering surface, whereas cores in the control group were fabricated smooth; airborne-particle abrasion (APA) was applied to both surfaces of the control cores and to the internal surface only of the textured cores. Color matching against target teeth was assessed using a spectrophotometer. Clinical evaluations were performed at baseline and at the 1-, 3-, and 6-month follow-ups and included assessment of color match, translucency, chipping/fracture, and participant satisfaction. Color differences (ΔE₀₀) were compared between groups by using independent-samples t tests, and the repeatedly measured clinical ratings were analyzed by using linear mixed-effects models (α = 0.05).</p><p><strong>Results: </strong>No statistically significant differences in ΔE₀₀ were found between the groups in any evaluated region, and no significant effects of group, time, or their interaction were found for color match, translucency, or participant satisfaction (p > 0.05). No chipping or fracture occurred in either group, and participant satisfaction remained high in both groups. The mean ΔE₀₀ values ranged from 2.52 to 3.54 across regions and groups.</p><p><strong>Conclusions: </strong>Over a 6-month clinical evaluation, PVZCs with 3D-printed textured cores showed esthetic and clinical performance comparable with that of air-abraded nontextured cores. These findings are preliminary and require confirmation in studies with larger samples and longer follow-up.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149197290","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":"Clinical performance of ultratranslucent monolithic zirconia posterior crowns compared with lithium disilicate crowns: A pilot, randomized, double-blind, controlled clinical trial.","authors":"Larissa Mendonça Miranda, Isabelle Helena Gurgel de Carvalho, Lidya Nara Marques de Araújo, Mutlu Özcan, Rodrigo Othávio de Assunção E Souza","doi":"10.1111/jopr.70250","DOIUrl":"https://doi.org/10.1111/jopr.70250","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate, through a pilot, randomized, double-blind, controlled clinical trial, the clinical performance of ultratranslucent monolithic zirconia (UTZr) compared to lithium disilicate (LD) posterior crowns after 24 months of follow-up.</p><p><strong>Materials and methods: </strong>Twenty-four crowns were fabricated and placed in 18 patients, assigned to 2 groups: Control (LD-IPS e.max CAD/Ivoclar) and Experimental (UTZr-Zircon FitPlus/Talmax). Longevity was assessed using the modified United States Public Health Service (USPHS) Ryge criteria, visual analog scales (VAS) for patients' self-perceived esthetics, and the Oral Impacts on Daily Performances (OIDP) index for quality-of-life evaluation. Evaluations were conducted at baseline (T0) and 1 (T1), 6 (T2), 12 (T3), and 24 (T4) months after cementation. Survival analysis was performed using the Kaplan-Meier method with log-rank test (α = .05). OIDP and USPHS data were analyzed descriptively, while VAS esthetic satisfaction was analyzed using Mann-Whitney, Friedman, and Wilcoxon post-hoc tests.</p><p><strong>Results: </strong>The mean age of participants was 38.5 years. Eleven crowns were fabricated with LD and 13 with UTZr. After 24 months, the cumulative survival rate was 100% for both groups. Both groups showed a significant improvement in esthetic satisfaction over time (P<.05). No ceramic fractures, occlusal changes, marginal integrity alterations, or secondary caries were observed; however, one UTZr crown presented minor marginal discoloration.</p><p><strong>Conclusions: </strong>Both materials, ultratranslucent monolithic zirconia and lithium disilicate, demonstrated high survival rates and satisfactory clinical performance after 24 months.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149197340","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":"Patient's denture assessment cutoff values for classifying denture-treatment needs in removable complete denture wearers.","authors":"Tin Thinzar Linn, Phichaya Phimonwongsaphor, Pinpinut Wanichsaithong, Pimduen Rungsiyakull","doi":"10.1111/jopr.70252","DOIUrl":"https://doi.org/10.1111/jopr.70252","url":null,"abstract":"<p><strong>Purpose: </strong>To determine the patient's denture assessment (PDA) cutoff values for classifying treatment needs in patients wearing conventional complete dentures (CCDs) and implant-retained overdentures (IODs).</p><p><strong>Materials and methods: </strong>Ninety-six edentulous patients wearing mandibular CCDs or IODs (with opposing maxillary CCDs) for ≥3 months were clinically categorized into three treatment-need groups: no treatment required (G1), chairside maintenance required (G2), and laboratory modification required (G3) for the denture. The participants then completed the 19-item PDA using a 100-mm visual analogue scale. Data were analyzed using Spearman's rank correlation for association between PDA scores and treatment needs, Kruskal-Wallis tests for pairwise comparisons, and multinomial logistic regression to evaluate the association between the PDA subscale scores and treatment needs. Receiver operating characteristic curves were used to identify optimal PDA cutoffs on the basis of the highest Youden's index values alongside likelihood ratios (LRs).</p><p><strong>Results: </strong>Overall PDA scores correlated significantly with treatment needs (r = 0.606, p < 0.0001). Overall PDA scores differed significantly between G3 and G1 (p ≤ 0.001) and between G3 and G2 (p ≤ 0.02), but did not differ significantly between G1 and G2. For discriminating G3 from G1/G2, the optimal cutoff score was ≤83 mm (area under the curve [AUC]: 0.96, sensitivity: 0.86, specificity: 0.91, positive LR [LR+]: 6.6, negative LR [LR-]: 0.1). To identify any treatment need (G2/G3 vs. G1), the optimal cutoff score was ≤91 mm (AUC: 0.79, sensitivity: 0.81, specificity: 0.70, LR+: 2.7, LR-: 0.3). Lower \"upper denture\" subscale scores were significantly associated with the need for laboratory modifications (p = 0.03).</p><p><strong>Conclusions: </strong>The PDA is an effective clinical screening tool for complete-denture treatment needs, particularly for identifying laboratory-modification requirements. Suggested overall PDA cutoff scores are 84-91 mm for chairside adjustments and ≤83 mm for laboratory modifications.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149148448","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":"Accuracy of complete-arch implant positions recorded by analog impressions, intraoral scanning, and extraoral and intraoral photogrammetry.","authors":"Richard Lee, Darren Littlefair, Dale Howes","doi":"10.1111/jopr.70249","DOIUrl":"https://doi.org/10.1111/jopr.70249","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this in vitro study was to compare the accuracy of analog impressions, intraoral scanning, extraoral photogrammetry, and intraoral photogrammetry in recording complete-arch implant positions.</p><p><strong>Materials and methods: </strong>A stainless-steel reference model representing an edentulous maxilla with six parallel implants and multiunit abutments was tested using two analog impression techniques; seven intraoral scanners with vertical scan bodies: Omnicam, Primescan, Trios 3, Trios 4, Trios 5, i700, and Aoralscan 3; three extraoral photogrammetry systems: PIC, iCam4D, and Tupel 3D; and one intraoral photogrammetry system: Aoralscan Elite (n = 10 per group). A coordinate-measuring machine measured the abutment center positions and axes on the reference model and analog stone casts, and a computer-aided design program measured the intraoral scanning and photogrammetry digital files. The inter-abutment distances and angles were compared to determine the accuracy of each technique.</p><p><strong>Results: </strong>The analog groups recorded linear trueness of 39-47 µm (precision 17-18 µm) and angular trueness of 0.07°-0.08° (precision 0.02°-0.05°). The intraoral scanning groups recorded linear trueness of 78-141 µm (precision 18-83 µm) and angular trueness of 0.23°-0.71° (precision 0.05°-0.24°). The extraoral photogrammetry groups recorded linear trueness of 53-77 µm (precision 2-30 µm) and angular trueness of 0.22°-0.57° (precision 0.01°-0.05°). The intraoral photogrammetry recorded linear trueness of 15 µm (precision 6 µm) and angular trueness of 0.11° (precision 0.02°).</p><p><strong>Conclusions: </strong>Intraoral scanning demonstrated deviations (mean 101 µm) over twice that of analog impressions (mean 43 µm), while extraoral photogrammetry (mean 62 µm) and intraoral photogrammetry (mean 15 µm) demonstrated accuracy comparable or superior to analog impressions.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149148477","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":"Bond strength of vinyl polysiloxane tray adhesive to 3D-printed tray materials: A comparison study.","authors":"Gregory Neil Wilkins, Sloan D McLaughlin, Steven E Handel, Jennifer V Sabol","doi":"10.1111/jopr.70254","DOIUrl":"https://doi.org/10.1111/jopr.70254","url":null,"abstract":"<p><strong>Purpose: </strong>To understand the effectiveness of traditional vinyl polysiloxane (VPS) tray adhesive on 3D-printed custom tray material.</p><p><strong>Materials and methods: </strong>Custom tray specimens were designed using Meshmixer (Meshmixer, San Rafael, CA, USA) and made of urethane dimethacrylate (UDMA) Megatray (Select Dental, New York, USA), Formlabs Custom Tray Resin (Formlabs, Somerville, MA, USA), and Asiga DentaTRAY (Asiga, Sydney, Australia). Each tray was designed to have a flat 25 mm x 25 mm base, a wall of 6 mm height angled at 45 degrees to the base, and an attachment area for testing. The UDMA samples served as the study's control group. Printed trays were either unaltered or abraded with 100-µm aluminum oxide at 30 bar. VPS Tray Adhesive (Kerr, Michigan, USA) was placed on the trays and allowed to dry in accordance with the manufacturer's instructions for use. Aquasil Ultra + Smart Wetting Tray Impression Material (Charlotte, North Carolina, USA) was placed on the tray and allowed to set. A universal testing machine (Model E10000, Instron Corp, Massachusetts, USA) was used to place 1.4 kg of pressure on the tray specimen to mimic intraoral pressure. Then, it was pulled to conduct the peel test, separating the custom tray from the VPS. A one-way ANOVA was performed with tray group serving as the independent variable and maximum load to peel as the dependent variable. Two independent planned comparisons were performed to test impression material (Asiga vs. Formlabs) and effects of abrasion (Unaltered vs. Air-Particle Abrasion).</p><p><strong>Results: </strong>The Asiga-Unaltered tray group exhibited the highest adhesive properties of all trays, with a mean force of adhesive failure of 76.94 ± 6.98 N. The lowest was the Asiga-Air-Particle Abrasion group with a mean value of 56.78 ± 6.07 N. The Asiga-Unaltered test group results reflect the most similar results to the UDMA control group with values of 76.94 ± 6.98 N and 75.12 ± 6.77 N, respectively.</p><p><strong>Conclusions: </strong>The Asiga DentaTRAY Resin performed the best with the highest load to peel values when compared to the control and Formlabs Custom Tray Resin. It was also determined that air-particle abrading of the 3D-printed trays resulted in lower values of adhesion. Some 3D-printed resins could provide comparable, if not better retention of VPS when compared to traditional UDMA tray material.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149149337","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":"An innovative approach for retreatment of prosthetically failing implant-supported fixed prostheses with a complete digital workflow: A technique report.","authors":"Sinem Kahya Karaca, Fatmanur Demir Boz, Kıvanç Akça","doi":"10.1111/jopr.70255","DOIUrl":"https://doi.org/10.1111/jopr.70255","url":null,"abstract":"<p><p>Complications in fixed implant prostheses are frequently encountered and can negatively impact patients' quality of life. This technique outlines a complete digital workflow for the remake of full-mouth, implant-supported, cement-retained restorations necessitated by esthetic and functional impairments. For the digital recording of reused abutments, a contemporary technique was employed in which extraorally scanned abutment data were digitally superimposed onto their corresponding counterparts in the intraoral scans. The jaw relation record procedures were completed in stages. Initially, centric relation was recorded using a graphic recording technique with a gothic arch tracer. This was followed by capturing mandibular movements under anterior guidance as real movement data using the Jaw Motion Analyzer (Zebris). Based on these digital records, the definitive prostheses were designed and delivered. Follow-up was conducted at six months to evaluate clinical outcomes.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149138984","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 influence of shade guide presentation sequence and psychosocial factors on patient tooth shade selection: A three-arm randomized controlled trial","authors":"Alaa Al-Haddad BDS, MSc, PhD,&nbsp;Rawan Abu Zaghlan DDS, MSc, MEndo,&nbsp;Noor H. Ismail DDS, MPros,&nbsp;Alaa Sabrah PhD,&nbsp;Omar Al-karadsheh BDS, (D.Ch.Dent)","doi":"10.1111/jopr.70200","DOIUrl":"10.1111/jopr.70200","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Purpose&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;To determine whether the presentation sequence of natural and bleached-shade options influences patient shade selection and to evaluate the association between the psychosocial impact of dental esthetics (PIDAQ) and final selected shade lightness.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Materials and Methods&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;In this three-arm randomized controlled trial, 210 participants seeking esthetic dental treatment were randomized to three shade-presentation protocols: Group A (natural → bleached), Group B (bleached → natural), or Group C (simultaneous full range with confirmation). Participants completed the psychosocial impact of dental esthetics questionnaire (PIDAQ) prior to shade selection. Initial “first-impression” and final shade selections were recorded using the VITA 3D-MASTER system with bleached tabs (0M1–5M3). Primary outcomes included switching between selections, lightness change (Δ&lt;i&gt;L&lt;/i&gt;), and the association between PIDAQ and final selected lightness (final &lt;i&gt;L&lt;/i&gt;). Secondary outcomes included bleached-shade selection, color-difference discrepancies (Δ&lt;i&gt;E&lt;/i&gt;&lt;sub&gt;00&lt;/sub&gt;) versus objective baseline and clinician recommendation, and patient-reported rationale.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Results&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Presentation protocol significantly affected switching frequency, Δ&lt;i&gt;L&lt;/i&gt;* direction and magnitude, and bleached-shade selection (all &lt;i&gt;p&lt;/i&gt; &lt; 0.001). Switching was highest in Group A (31.4%) and lowest in Group C (1.4%). Δ&lt;i&gt;L&lt;/i&gt;* showed protocol-dependent direction: a net shift toward lighter shades in Group A (+2.10) and toward darker shades in Group B (−0.93). Bleached-shade selection was most frequent in Group B (84.3%) and least frequent in Group A (31.4%). Higher PIDAQ scores were independently associated with lighter final selections (&lt;i&gt;p&lt;/i&gt; &lt; 0.001), with a significant Group × PIDAQ interaction (&lt;i&gt;p&lt;/i&gt; = 0.006), indicating that the strength of this association varied by presentation protocol. Patient–clinician color discrepancies (Δ&lt;i&gt;E&lt;/i&gt;&lt;sub&gt;00&lt;/sub&gt;) were smallest in Group A (7.68) and largest in Group B (16.24).&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Conclusions&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Shade guide presentation sequence is a modifiable determinant of patient esthetic preference and decision stability. Patients with a higher psychosocial impact related to dental appearance prefer lighter shades, but this preference is modulated by how options are presented. A structured protocol presenting the full shade range with a confirmation step minimizes decision volatility and may enhance patient–clinician alignment. Standardizing shade visualization by presenting the complete shade range con","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":"35 8","pages":"1219-1230"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148537589","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":"Relative accuracy of intraoral photogrammetry and intraoral scanning with conventional scan-body for full-arch implants.","authors":"Sherif Aly Sadek, Mona Samir Gaber, Marwa Hassan Mostafa, Hadiel Zamzam","doi":"10.1111/jopr.70237","DOIUrl":"https://doi.org/10.1111/jopr.70237","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the relative accuracy of intraoral photogrammetry (IPG) and intraoral scan (IOS) with conventional scan bodies (IOS-CB) for complete-arch implant impressions, using the conventional splinted open-tray impression digitized with a laboratory scanner (COT-LS) as the reference standard.</p><p><strong>Materials and methods: </strong>Twenty-six edentulous maxillary arches restored with four BioHorizons Tapered Internal implants supporting multiunit abutments were included. For each patient, three impressions were obtained: (1) a conventional splinted open-tray impression poured in type IV dental stone and scanned with a laboratory extraoral scanner to generate the COT-LS dataset; (2) an IOS-CB using the Aoralscan Elite, with scan bodies present from the outset of a single continuous scanning pass; and (3) an IPG scan using the same device in photogrammetry mode with dedicated scan flags mounted on the multiunit abutments. STL files were analyzed in Geomagic Control X, with the COT-LS dataset used as the reference. Relative accuracy was quantified as centroid-based linear deviation from COT-LS following best-fit alignment. Measurement reproducibility was assessed using intraclass correlation coefficients (ICC) from two independent examiners analyzing the same datasets. The IOS-CB and IPG datasets were superimposed to calculate linear and three-dimensional positional deviations (µm). A repeated-measures two-way ANOVA with Tukey post hoc testing was performed (p < 0.05).</p><p><strong>Results: </strong>IPG demonstrated significantly lower deviations than IOS-CB in the full-arch, anterior right, and anterior left regions (p < 0.001). IOS-CB showed significantly lower deviations than IPG in both posterior right and posterior left regions (p < 0.001). The full-arch mean deviation was lower for IPG (39.2 µm) than IOS-CB (45.1 µm). All deviations for both techniques remained within the clinically acceptable threshold for passive fit. ICC values for measurement reproducibility exceeded 0.95 for both techniques.</p><p><strong>Conclusions: </strong>Within the limitations of this clinical study, IPG demonstrated a lower full-arch mean deviation than IOS-CB when evaluated against the COT-LS reference. However, as the inherent dimensional error of the COT-LS reference may approach or exceed the 5.9 µm between-technique difference, this finding should be considered hypothesis-generating rather than confirmatory evidence of a trueness advantage. Measurement reproducibility was high for both techniques (ICC >0.95).</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149116744","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 cleaning solution on surface properties of 3D-printed denture materials","authors":"Marina Rodrigues Santi DDS, MSc, PhD,&nbsp;Nadima Khodor BDS, MS,&nbsp;Michael Sekula MSc, PhD,&nbsp;David Donatelli DDS, FACP,&nbsp;Grace Mendonça De Souza DDS, MSc, PhD","doi":"10.1111/jopr.13936","DOIUrl":"10.1111/jopr.13936","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Purpose</h3>\u0000 \u0000 <p>To evaluate the effect of cleaning solutions on surface properties of 3D-printed resins.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Seven different resin materials for denture base and teeth were used in the form of 280 half-disks. Samples were randomly assigned to two cleaning groups (FD, FreshDent; PO, Polydent), with daily 2- or 3-min immersion followed by water storage, repeated for 30 days. Samples were then cleaned in an ultrasonic bath with water and analyzed for surface roughness (Keyence, VHX-7000N) and hardness (Shimadzu, HMV-2 series). The pH of cleaning solutions was analyzed over 5-min and the surface morphology of specimens was analyzed via scanning electron microscopy (SEM). Statistical analysis used two-way ANOVA (<i>α</i> = 0.05).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Surface roughness of base materials was significantly affected (<i>p</i> &lt; 0.001), whereas roughness of teeth materials was not. As for hardness, there was a significant interaction between materials and cleaning solution for both, base (<i>p</i> &lt; 0.001) and teeth (<i>p</i> &lt; 0.001). For teeth materials, PO significantly increased Denture's (Dentca) hardness and decreased that of Rodin's (Pac Dent), while PO significantly increased Rodin's Base (Pac Dent) hardness. The hardness of Flexcera Ultra (Envision Tec), Glidewell (Glidewell), Lucitone (Dentsply Sirona), and NextDent (NextDent) teeth and base materials were not affected by the cleaning solution. Overall, the pH of FD averaged 7.3 and PO averaged 6.6. All the SEM images indicated surface irregularities after immersion in either FD or PO.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>One-month of storage and cyclic cleaning of 3D- printed resins did not affect surface roughness but had a significant impact on hardness. The cleaning solutions’ effect was not homogeneous among materials.</p>\u0000 </section>\u0000 </div>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":"35 8","pages":"1249-1255"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142134204","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}