Journal of Esthetic and Restorative Dentistry最新文献

{"title":"Ultra-High-Speed Sintering of 3.5Y-TZP Zirconia: Time Reduction Without Compromising Translucency","authors":"Tatiana Roman, Hamdi Jmal, Teissir Ben Ammar , Adrien Greffet, Marc Lenertz, Olivier Etienne","doi":"10.1111/jerd.70221","DOIUrl":"10.1111/jerd.70221","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>To assess, firstly, the impact of three sintering speeds on translucency and grain size of 3.5Y-TZP zirconia (Katana HT) across clinically relevant thicknesses, and secondly, the effect of thermocycling on translucency.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Disc specimens were fabricated at six thicknesses (0.7–2.0 mm) and sintered using SLOW (7 h), FAST (90 min), or UHSS (18 min) protocols. Translucency (TP<sub>00</sub>, TP<sub>ab</sub>) was calculated after color measurements with a VITA Easyshade V on white and black background before and after thermocycling (<i>n</i> = 15). Grain size and crystalline composition were assessed was analyzed using SEM images (linear intercept). The effects of thickness, sintering, and thermocycling were quantified using a three-way ANOVA with η2a linear mixed-effects model with specimen as a random factor and partial η<sup>2</sup>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Thickness was the primary factor determining translucency (<i>pη</i>\u0000 <sup>2</sup> = 0.97, <i>p</i> < 0.001). In addition, the sintering protocol had a statistically significant, but limited effect (<i>pη</i>\u0000 <sup>2</sup> = 0.360.29). FAST produced higher translucency than UHSS (<i>p</i> = 0.01)Sintering protocols resulted in statistically significative translucency differences, yet within the acceptability thresholds (ΔTP<sub>00</sub> < 2.627). The effects of thermocycling were negligible (<i>pη</i>\u0000 <sup>\u0000 <i>2</i>\u0000 </sup> < 0.001 = 0.003). Grain size decreased with faster sintering (<i>p</i> < 0.05), with no SEM-detected degradation after thermocycling. Crystalline composition was affected by sintering protocol. The effects of thermocycling were negligible for all outcomes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Considering the 3.5Y-TZP zirconia composition and the furnace specificity, translucency was predominantly influenced by thickness, while sintering speed exhibited minimal clinical impact. UHSS enables major time reduction without compromising optical performance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Significance</h3>\u0000 \u0000 <p>Within the limitations of this in vitro study and within the tested furnace systems, ultra-high-speed sintering protocolUHSS allowed a substantial reduction in 3.5Y-TZP processing time while maintaining translucency within clinically accep","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2177-2191"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70221","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148375939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"6-Month Clinical Evaluation of Reduced Dentin Etching Time Using Universal Adhesives in Noncarious Cervical Lesions: A Double-Blind Randomized Clinical Trial","authors":"Mario Felipe Gutiérrez,&nbsp;Natalia Amo-Nicolás,&nbsp;Alondra Beniscelli-Vásquez,&nbsp;Romina Aliaga-Gálvez,&nbsp;Alessandro D. Loguercio","doi":"10.1111/jerd.70224","DOIUrl":"10.1111/jerd.70224","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>To evaluate the effect of reduced dentin etching time on the clinical performance of two universal adhesive systems in noncarious cervical lesions (NCCLs).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>A total of 144 NCCLs restorations were randomly placed in 36 participants according to four experimental groups: SUP5 (Scotchbond Universal Plus adhesive [pH ≈2.5–2.7] applied on dentin etched for 5 s [experimental group]); SUP15 (SUP applied on dentin etched for 15 s [control group]); GBU5 (Gluma Bond Universal adhesive [pH ≈1.5–1.8] applied on dentin etched for 5 s [experimental group]); GBU15 (GBU applied on dentin etched for 15 s [control group]). Restorations were evaluated at baseline and after 6 months, using the updated FDI criteria. Appropriate statistical analyses were performed (<i>α</i> = 0.05).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The recall rate was 100% at 6 months. Retention/material fracture rates were 97.2% (87.3–100) for SUP5 and SUP15, and 94.4% (83.1–100) for GBU5 and GBU15. No significant differences among the groups were observed for retention or material fracture. Two restorations showed minor marginal staining, two restorations showed minor postoperative (hyper-) sensitivity, and 25 restorations presented minimal marginal adaptation defects. No significant differences were observed among the groups for any secondary clinical parameters evaluated (<i>p</i> &gt; 0.05).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Reducing dentin etching time did not negatively affect the 6-month clinical performance of NCCLs resin restorations bonded with universal adhesives. Therefore, shorter dentin etching times represent a viable clinical approach in adhesive clinical procedures, reducing chair time.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Significance</h3>\u0000 \u0000 <p>Shortened dentin etching time does not compromise the short-term clinical performance of universal adhesive systems in NCCLs.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2163-2176"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70224","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148368511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calcium Hydroxide Associated With Chitosan Nanoparticles and Propolis: Effects on the Sealer-Dentin Interface","authors":"Gabrielle Jacob,&nbsp;Pedro Rossato Lourenço,&nbsp;Flavia Moura Medina Diniz,&nbsp;Glauce Crivelaro Nascimento,&nbsp;Manoel Damião Sousa-Neto,&nbsp;Jardel Francisco Mazzi-Chaves,&nbsp;Fabiane Carneiro Lopes-Olhê","doi":"10.1111/jerd.70218","DOIUrl":"10.1111/jerd.70218","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study evaluated the effect of calcium hydroxide-based intracanal medication protocols on the sealer-dentin interface, considering bond strength, adhesive interface adaptation, failure pattern, and dentin gelatinolytic activity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Fifty extracted human single-rooted teeth were biomechanically prepared and assigned to five groups (<i>n</i> = 10): no medication, calcium hydroxide, calcium hydroxide with chitosan nanoparticles, calcium hydroxide with propolis, and calcium hydroxide with chitosan nanoparticles and propolis. After 14 days, the medications were removed and the canals were obturated with AH Plus sealer. Bond strength was assessed by the push-out test, adhesive interface adaptation by confocal laser scanning microscopy, failure mode by stereomicroscopy, and gelatinolytic activity by in situ zymography.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>No significant differences in bond strength or adhesive interface adaptation were observed among the experimental groups (<i>p</i> &gt; 0.05). Failure mode was associated with the experimental group and root third (<i>p</i> &lt; 0.05), with mixed failures predominating. The combination of calcium hydroxide, chitosan nanoparticles, and propolis showed significantly lower gelatinolytic activity than the non-medicated control and calcium hydroxide alone (<i>p</i> &lt; 0.05), whereas the other medicated groups did not differ from the control.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Calcium hydroxide-based intracanal medications, alone or combined with chitosan nanoparticles and/or propolis, did not affect sealer-dentin bond strength or adhesive interface adaptation. The combination of calcium hydroxide, chitosan nanoparticles, and propolis reduced dentin gelatinolytic activity compared with the non-medicated control and calcium hydroxide alone.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Significance</h3>\u0000 \u0000 <p>The tested calcium hydroxide-based medications did not impair sealer-dentin adhesion. The association of calcium hydroxide with chitosan nanoparticles and propolis reduced dentin gelatinolytic activity without affecting immediate adhesive outcomes.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2141-2149"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148308292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnosis and Dentists' Treatment Preferences for Vestibular Enamel Defects—A Cross-Sectional Survey","authors":"Basel Kharbot,&nbsp;Marcus Cebula,&nbsp;Vinay Pitchika,&nbsp;Falk Schwendicke,&nbsp;Susanne Effenberger","doi":"10.1111/jerd.70217","DOIUrl":"10.1111/jerd.70217","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>Vestibular enamel defects, including WSL, MIH, or fluorosis, can impair esthetics and patient well-being, making accurate diagnosis essential for selecting appropriate treatment strategies. However, distinguishing these based solely on clinical images—an increasingly common scenario in digital communication—can be challenging. This pilot study aimed to assess dentists' diagnosis accuracy and confidence in assessing clinical images of vestibular enamel defects, and how the diagnosis influenced treatment choices.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>A cross-sectional survey was distributed primarily to dentists from Europe and South America. It included demographic questions and 10 clinical images (two showing WSL, three fluorosis, four MIH, and one MIH/enamel hypoplasia combined). Reference diagnoses were established based on consensus among three specialists. Participants were asked to diagnose each image, select their preferred treatment options, and rate their diagnostic and therapeutic confidence using a 5-point Likert scale.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A total of 168 dentists completed the survey. Overall, diagnostic accuracy was 52%, with the highest for fluorosis (66%) and the lowest for the mixed case (33%). Most participants correctly diagnosed 3–8 of 10 cases. Conservative treatment options were chosen primarily, with resin infiltration selected in 70% of responses regardless of diagnosis. Diagnostic confidence was reported in 72% of cases.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The diagnostic accuracy of vestibular enamel defects based on clinical images was limited, and overconfidence was frequent. Dentists preferred conservative treatment strategies, though their choices were influenced by diagnostic accuracy.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2124-2132"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70217","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148301784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-Term Clinical and Radiographic Outcomes of Ceramic Dental Implants: An 11-Year Retrospective Cohort Study","authors":"Mona Monzavi,&nbsp;Medis Masnavi,&nbsp;Ayman Zraiqat,&nbsp;Al Manesh","doi":"10.1111/jerd.70234","DOIUrl":"10.1111/jerd.70234","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>Evidence on zirconia dental implants remains limited. This retrospective study evaluated clinical and radiographic outcomes of contemporary ceramic implant systems placed in private practice with variable follow-up of up to 11 years.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>This retrospective cohort evaluation included 174 patients receiving 275 zirconia implants (one-piece systems and a two-piece tissue-level screw-retained system) placed between 2013 and 2025 with a minimum one-year follow-up. Implant survival and success rates were assessed. Standardized periapical radiographs were analyzed using ImageJ to measure marginal bone levels at placement and annually thereafter. Peri-implant soft tissue health was evaluated using the modified Plaque Index and modified Gingival Index.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Kaplan–Meier cumulative implant survival was 97.6%, and overall success was 95.3%. Mean first-year marginal bone loss ranged from 0.25 to 0.74 mm, with a pooled mean of 0.49 mm. Mean annual bone loss after year 1 was low at 0.12 mm/year. Soft tissue indices remained low, and no suppuration was observed. Two implant fractures occurred (0.73%); remaining failures were associated with lack of osseointegration or aseptic loosening.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Within the limitations of this retrospective study, contemporary ceramic implant systems demonstrated high survival and success with stable peri-implant bone levels and favorable soft tissue conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Significance</h3>\u0000 \u0000 <p>This study provides real-world clinical and radiographic data on contemporary ceramic implant systems, including one-piece ceramic implants and ATZ two-piece ceramic implants with carbon fiber screws. These findings may help clinicians contextualize the observed performance of ceramic implants in daily practice. Ceramic implants may represent a viable metal-free treatment option for appropriately selected patients, particularly in esthetically demanding situations, when careful case selection, system-specific training, and adherence to surgical and restorative protocols are applied.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2074-2088"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70234","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148471214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How the Build Angle Affects the Marginal and Internal Fit of 3D Printed Definitive FPDs: An in Vitro Study","authors":"Bora Akat,&nbsp;Bahar Kavafoğlu Yilmaz,&nbsp;Fehmi Gönüldaş,&nbsp;Mert Ocak,&nbsp;Stephen F. Rosenstiel,&nbsp;Evşen Tamam","doi":"10.1111/jerd.70215","DOIUrl":"10.1111/jerd.70215","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Statement of Problem</h3>\u0000 \u0000 <p>Printing parameters may influence the fit of additively manufactured dental restorations. However, the effect of small incremental build angles on the marginal and internal fit of stereolithography (SLA)-printed definitive 3-unit fixed partial dentures (FPDs) has not been sufficiently investigated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Purpose</h3>\u0000 \u0000 <p>The purpose of this in vitro study was to evaluate the effect of small incremental build angles (0°, 10°, 20°, and 30°) on the marginal and internal fit of SLA-printed definitive 3-unit FPDs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>A typodont maxillary first premolar and first molar were prepared to serve as abutments for a 3-unit FPD. After digital scanning, restorations were designed using dental CAD software and fabricated from a definitive resin using an SLA printer. Forty FPDs were produced at four different build angles (0°, 10°, 20°, and 30°) (<i>n</i> = 10). Marginal and internal fit were evaluated using microcomputed tomography. Gap measurements were obtained at five reference points for each abutment. Data were analyzed using one-way analysis of variance followed by Tukey honestly significant difference post hoc tests (<i>α</i> = 0.05).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Build angle significantly affected the marginal and internal fit (<i>p</i> &lt; 0.05). For both molar and premolar supports, the highest fit was achieved with 30°, followed by 20°. Differences between 20°–30° and 0°–10° were not statistically significant (<i>p</i> &gt; 0.05). The marginal discrepancy was higher than the internal discrepancy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Within the limitations of this in vitro study, build angle influenced the marginal and internal fit of SLA-printed 3-unit FPDs. Among the orientations tested, the 30° build angle generally produced the smallest gap values.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2133-2140"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70215","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148308284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Papilla-Preserving Gingival Fiber Retention Osseous Surgery in the Anterior Maxilla: A Novel Clinical Technique","authors":"Abdusalam E. Alrmali,&nbsp;Hom-Lay Wang","doi":"10.1111/jerd.70226","DOIUrl":"10.1111/jerd.70226","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>To describe papilla-preserving gingival fiber retention osseous surgery (PP-FibReOS), a biologically driven resective approach intended to eliminate periodontal pockets while maintaining interproximal connective tissue and papillary stability in esthetically demanding maxillary anterior sites.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Technique</h3>\u0000 \u0000 <p>PP-FibReOS was implemented in two challenging anterior maxillary scenarios: functional crown lengthening and surgical pocket elimination in a stage IV, grade C periodontitis case. The key feature of this protocol uses a split-full-split buccal flap with selective coronal tissue removal, combined with deliberate preservation of a de-epithelialized interproximal supracrestal fiber complex attached to the palatal flap, which is designed to support papillary volume during healing. Osseous recontouring is performed conservatively, with the flap repositioned in a double-layered papillary complex closure just coronal to the bone crest. At 36-month follow-up, both cases showed shallow probing pocket depths (PPD) of 1–3 mm and absence of bleeding on probing, together with stable interdental papilla positions, high clinician-reported esthetic scores (pink esthetic score [PES] 11–12), and patient satisfaction ratings of 10/10.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Within the limits of this two-case proof-of-concept report, PP-FibReOS may offer a promising alternative for maxillary resective surgery when preservation of papillary architecture is a primary objective. Larger controlled studies are needed to clarify its indications, limitations, and long-term predictability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Significance</h3>\u0000 \u0000 <p>PP-FibReOS provides a possible approach for selected anterior maxillary defects in which pocket elimination or functional crown lengthening must be balanced against preservation of interdental soft-tissue dimensions. In patients with a thick periodontal phenotype, adequate supracrestal connective tissue, and predominantly horizontal or shallow angular defects, a fiber-retentive palatal flap combined with conservative osseous reshaping may help maintain stable, shallow probing pocket depths while limiting increases in clinical crown length and visible loss of papillary fill.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2057-2066"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70226","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148368635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rotational Stability of Non-Engaging Abutments: Influence of Positioning Guide Thickness and Definitive Prosthesis Cement Space","authors":"Jaeyoung Kim,&nbsp;Hyeonwoo Lee,&nbsp;Jihoon Shin,&nbsp;June-Sung Shim,&nbsp;Jong-Eun Kim","doi":"10.1111/jerd.70211","DOIUrl":"10.1111/jerd.70211","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>To evaluate tightening-stage–dependent rotational behavior of non-engaging abutments according to delivery method, focusing on positioning guides and cement space configuration.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Non-engaging prefabricated abutments were delivered using positioning guides of varying thicknesses or definitive prostheses fabricated with different cement space. Angular deviation was measured after initial hand tightening and subsequent tightening stages. Positional changes across tightening stages were compared among groups to assess positional reproducibility and stability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>When positioning guides were used, angular displacement was observed after initial hand tightening; however, no significant additional displacement occurred during subsequent torque application, indicating maintenance of positional reproducibility. Guide thickness did not significantly influence rotational stability. In contrast, definitive prosthesis–assisted delivery demonstrated tightening-stage–dependent rotational behavior that varied with cement space. With a conventional cement space, angular deviation remained comparable to that observed with positioning guides, whereas increased cement space resulted in progressive angular displacement during tightening. Across all groups, rotational stability was more associated with interfacial space control than with material stiffness.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Within the limitations of this study, the rotational behavior of non-engaging abutments was influenced by the delivery method and interfacial space configuration. Positioning guides promoted reproducible seating, whereas increased cement space during definitive prosthesis–assisted delivery compromised rotational stability.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2112-2123"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148295276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of Periodic Repolishing on the Surface and Mechanical Properties of Resin-Based CAD/CAM Materials After Different Cycles of Combined Simulated Toothbrushing and Mechanical Cycling","authors":"Gabriel Nunes Sampaio,&nbsp;Amanda Martinelli Moretti,&nbsp;Mariana Nogueira Bianchi,&nbsp;Victor Alves Nascimento,&nbsp;Aldiéris Alves Pesqueira","doi":"10.1111/jerd.70235","DOIUrl":"10.1111/jerd.70235","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study aimed to evaluate the effectiveness of periodic repolishing on the surface and mechanical properties of resin-based CAD/CAM materials subjected to combined mechanical cycling and simulated toothbrushing, with or without periodic repolishing.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Two resin-based CAD/CAM materials were investigated (Tetric CAD [TC] and Shofu HC [SH]). Groups (<i>n</i> = 12) were assigned according to the evaluation period and repolishing (RPL) condition. The aging protocol comprised simulated toothbrushing (ST—200 g load, 250 cycles/min) combined with mechanical cycling (MC—50 N load, 1.67 Hz frequency) performed in aging intervals (AI—2.4 × 10⁵ MC + 10,000 ST), totaling two periods (5 × AI and 10 × AI). Periodic repolishing was performed using a clinical polishing system (OptraGloss, Diamond High-Gloss polisher [HP]). Surface roughness (Ra), Vickers microhardness (VH), flexural strength (FS), and elastic modulus (EM) were quantitatively evaluated, while SEM and AFM analyses were performed qualitatively. Data normality and homogeneity were verified, followed by two-way ANOVA and Tukey's post hoc test (<i>α</i> = 0.05).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Aging significantly increased surface roughness and reduced microhardness in both resin-based CAD/CAM materials (<i>p</i> &lt; 0.05). Periodically repolished groups (T_1RPL and T_2RPL) showed higher VH and lower Ra values (<i>p</i> &lt; 0.05) than their non-repolished counterparts (T₁ and T₂). No significant differences in FS or EM were observed after aging (<i>p</i> = 0.664 and 0.185, respectively).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Aging significantly affected the surface roughness and microhardness of both materials. Periodic repolishing proved to be an effective strategy for minimizing the effects of aging, thereby reducing surface roughness and preserving microhardness.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Clinical Significance</h3>\u0000 \u0000 <p>Intraoral repolishing at yearly recall intervals may help control surface degradation, maintain smoother surfaces, and preserve microhardness over time, particularly for indirect restorations fabricated from resin-based CAD/CAM materials.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2217-2232"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jerd.70235","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148520323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Combined Mechanical and Thermal Cycling on Adhesion of a New Self-Cure Bulk-Fill Composite","authors":"Bruna Perazza,&nbsp;Érika Mayumi Omoto,&nbsp;Anderson Catelan,&nbsp;Caio César Pavani,&nbsp;Ticiane Cestari Fagundes","doi":"10.1111/jerd.70236","DOIUrl":"10.1111/jerd.70236","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study aimed to evaluate the adhesive performance of a new self-cure bulk-fill restorative system compared with conventional and light-cured bulk-fill resin composites after mechanical and thermal cycling.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Sixty molars were prepared for Class I cavities and restored according to the restorative systems from each group. After 24 h of storage, 30 specimens were sectioned to obtain rectangular sticks (0.9 ± 0.1 mm²), which were submitted to microtensile bond strength testing. The remaining specimens were submitted to mechanical cycling; subsequently, beams were thermocycled and tested. Three beams from each group were subjected to nanoleakage testing to obtain illustrative images. Two-way ANOVA and Tukey's post hoc tests were performed, with a significance level of 5%.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>No difference on bond strength was observed among groups after 24 h (<i>p</i> &gt; 0.05). Although all restorative systems showed adhesion reduction, self-cure bulk-fill resin composite showed higher values compared to other resin composites after cycling (<i>p</i> &lt; 0.05). Nanoleakage images revealed a continuous adhesive interface between the self-cure bulk-fill composite and dentin, which was maintained after cycling.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>New self-cure bulk-fill resin composite showed initially similar adhesive performance to other restorative systems; however, it demonstrated superior adhesion after mechanical and thermal aging.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":"38 11","pages":"2207-2216"},"PeriodicalIF":4.6,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148471221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}