European Journal of Oral Sciences最新文献

Fracture load and three-dimensional internal void analysis of direct composites used to restore worn molars. 直接复合材料修复磨牙的断裂载荷及三维内空洞分析。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-05-06 DOI: 10.1111/eos.70104

Topias Yli-Urpo, Jorma Määttä, Auli Suominen, Pekka K Vallittu, Timo Närhi, Anna-Maria Le Bell-Rönnlöf, Jasmina Bijelic-Donova

{"title":"Fracture load and three-dimensional internal void analysis of direct composites used to restore worn molars.","authors":"Topias Yli-Urpo, Jorma Määttä, Auli Suominen, Pekka K Vallittu, Timo Närhi, Anna-Maria Le Bell-Rönnlöf, Jasmina Bijelic-Donova","doi":"10.1111/eos.70104","DOIUrl":"https://doi.org/10.1111/eos.70104","url":null,"abstract":"This study evaluated (1) the load-bearing capacity of molars restored with direct occlusal veneers fabricated either from short-fiber-reinforced composite (SFRC) or particulate-filled composite (PFC) and the presence of internal voids within the materials, and (2) effect of water storage on the fracture load and correlation between internal voids and fracture load. Sixty human molars (n = 10/group) were prepared with flat occlusal surfaces and preserved enamel margins simulating worn teeth. Conventional molds were taken for each tooth to control the preparation depth and transparent molds to restore the teeth to their original shape. Following bonding procedure, teeth were restored with flowable SFRC, flowable PFC, or condensable PFC using either injectable or pressing technique. Restored teeth were stored in water for 1 d or 6 months before the static loading test. Fracture mode and three-dimensional internal void analyses were additionally conducted. SFRC occlusal veneers showed significantly higher fracture load (3661 ± 446 N) than both PFC materials, flowable PFC (2064 ± 372 N) and condensable PFC (2183 ± 563 N). SFRC redirected the fractures towards the periphery of the restoration. Prolonged water storage duration or single voids did not adversely affect the fracture load. The use of SFRC as occlusal veneers for restoring molars improves the fracture load and the fracture propagation.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70104"},"PeriodicalIF":1.8,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single- or two-visits endodontic treatment: Impact of irrigants on surface roughness, microhardness, topography, and fracture resistance of root dentin. 单次或两次根管治疗：冲洗剂对牙根表面粗糙度、显微硬度、形貌和抗折断性的影响。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-05-06 DOI: 10.1111/eos.70103

Yasmin Padoin, Sidnei Flores de Pellegrin, Duvan Cala Castillo, William Lemos Bevilaqua, Gabriel Kalil Rocha Pereira, Guilherme Pauletto

{"title":"Single- or two-visits endodontic treatment: Impact of irrigants on surface roughness, microhardness, topography, and fracture resistance of root dentin.","authors":"Yasmin Padoin, Sidnei Flores de Pellegrin, Duvan Cala Castillo, William Lemos Bevilaqua, Gabriel Kalil Rocha Pereira, Guilherme Pauletto","doi":"10.1111/eos.70103","DOIUrl":"https://doi.org/10.1111/eos.70103","url":null,"abstract":"This study evaluated the effect of the number of simulated endodontic treatment visits and the type of irrigant on the surface roughness, microhardness, topography, and fracture resistance of root dentin. Bovine roots were distributed into six groups (n = 14) according to the irrigant and number of treatment visits: 0.9% saline solution (single- or two-visits); 2.5% sodium hypochlorite (NaOCl) (single- or two-visits); 2% chlorhexidine (CHX) (single- or two-visits). Next, the roots were embedded in cylindrical acrylic molds for fracture resistance testing and fracture pattern analysis. In addition, dentin blocks were subjected to the same experimental protocols (n = 7) and analyzed for surface roughness, topography, and microhardness. Two-way anova, Tukey's post hoc and Fisher's exact tests were performed. There was no difference between the groups for fracture resistance or failure pattern. For surface roughness, highest values were observed when 2.5% NaOCl was used in combination with two simulated visits, findings that corroborate the dentin erosion observed in the microscopic analysis. For dentin microhardness, 2% CHX resulted in a reduction in this property, whereas the number of visits did not affect the outcome. In conclusion, different irrigants caused microstructural changes in dentin under simulated single- and two-visits treatments, but fracture resistance remained unaffected.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70103"},"PeriodicalIF":1.8,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How does thermocycling affect the surface properties of ion-releasing bulk‑fill resin composites? 热循环如何影响离子释放体填充树脂复合材料的表面性能？

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-05-06 DOI: 10.1111/eos.70098

Ahmed Abdullah Al-Malwi, Abrar Nasser Bin Nooh, Rawan N Al-Kahtani, Abdulaziz Abdullah Al-Khureif, Hanan Al-Sunbul, Aftab Ahmed Khan, Muhammad Sohail Zafar, Jukka P Matinlinna

{"title":"How does thermocycling affect the surface properties of ion-releasing bulk‑fill resin composites?","authors":"Ahmed Abdullah Al-Malwi, Abrar Nasser Bin Nooh, Rawan N Al-Kahtani, Abdulaziz Abdullah Al-Khureif, Hanan Al-Sunbul, Aftab Ahmed Khan, Muhammad Sohail Zafar, Jukka P Matinlinna","doi":"10.1111/eos.70098","DOIUrl":"https://doi.org/10.1111/eos.70098","url":null,"abstract":"This in vitro study evaluated the effect of thermocycling on the surface properties of ion-releasing and non-ion-releasing bulk-fill resin composites. Disc-shaped samples were fabricated from three commonly used ion-releasing resin composites and one non-ion-releasing control (Filtek Bulk). The baseline readings were recorded for one-third of randomly selected samples, whereas the rest underwent thermocycling (5000 and 10,000 cycles between 5 and 55°C, 30 s dwell time, 10 s transfer). Surface morphology, topography, nanoindentation, contact angle, pH, and color changes were evaluated. Data were analyzed using one-way analysis of variance, followed by post hoc tests (p < 0.05). Thermocycling led to increased roughness, reduced hardness, and elastic modulus in ion-releasing groups. Filtek Bulk exhibited minimal changes, with roughness increasing slightly (0.64 ± 0.08 to 0.79 ± 0.08 µm) and nanohardness decreasing (0.67 to 0.58 GPa). Beautifil Bulk Restorative and Fill-Up! showed moderate degradation, whereas Cention Forte experienced the sharpest decline in tested properties. Filtek Bulk maintained the highest color stability, whereas Cention Forte showed pronounced discoloration. Thermocycling was pronounced in ion-releasing bulk-fill restorative resin composites compared to non-ion-releasing ones. These findings suggest that, alongside therapeutic benefits, surface integrity, mechanical stability, and long-term esthetics must be considered when selecting ion-releasing bulk-fill restorative composites.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70098"},"PeriodicalIF":1.8,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biological effects of a premixed calcium silicate pulp-capping material containing dimethyl sulphoxide as a vehicle: In vitro and in vivo study. 以二甲基亚砜为载体的硅酸钙浆盖料的生物效应：体外和体内研究。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-05-06 DOI: 10.1111/eos.70096

Min-Ji Choi, Eun-Sook Kang, Min-Kyeong Kim, Kenta Tsuchiya, Jukka P Matinlinna, Kwang-Won Lee, Kyung-San Min

{"title":"Biological effects of a premixed calcium silicate pulp-capping material containing dimethyl sulphoxide as a vehicle: In vitro and in vivo study.","authors":"Min-Ji Choi, Eun-Sook Kang, Min-Kyeong Kim, Kenta Tsuchiya, Jukka P Matinlinna, Kwang-Won Lee, Kyung-San Min","doi":"10.1111/eos.70096","DOIUrl":"https://doi.org/10.1111/eos.70096","url":null,"abstract":"This study aimed to compare the biological performance of a hydraulic calcium silicate cement (EndocemMTA Premixed) containing dimethyl sulphoxide (DMSO), developed to improve handling properties, in comparison with ProRoot mineral trioxide aggregate and Biodentine. Human dental pulp cells were used for in vitro evaluation of cytocompatibility, cell migration and cell-material interactions. Odontogenic differentiation was assessed using a 3D culture model designed to simulate the clinical environment. Pulp capping was performed in vivo on rat maxillary molars, and reparative dentin formation and pulpal inflammatory responses were evaluated using micro-computed tomography (µCT) and histological analyses. In vitro, all investigated materials exhibited comparable cytocompatibility, cell migratory behaviour and odontogenic marker expression, with no significant differences among study groups. The µCT analysis demonstrated significantly greater reparative dentin formation in all experimental groups compared with the control, with Biodentine producing a higher dentin volume than EndocemMTA Premixed. Histological evaluation revealed no significant differences among the experimental groups with respect to pulpal inflammation or dentin bridge continuity. These findings suggest that the incorporation of DMSO into premixed formulations would not adversely affect cytocompatibility or pulp healing. Moreover, the 3D model used in this study might serve as a clinically relevant platform for evaluating pulp-material interactions.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70096"},"PeriodicalIF":1.8,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147835131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving fatigue resistance of translucent 4Y-PSZ zirconia through glass gradation. 通过玻璃级配提高半透明4Y-PSZ氧化锆的抗疲劳性能。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-05-03 DOI: 10.1111/eos.70101

Felipe Machado Souza, Larissa M M Alves, Edisa O Sousa, Tiago Moreira Bastos Campos, Giovana Assis Marcolino, Mariana Miranda de Toledo Piza, Rainã S Dias, Satoshi Yamaguchi, Petra C Gierthmuehlen, Lukasz Witek, Paulo G Coelho, Estevam A Bonfante, Ernesto B Benalcazar-Jalkh

{"title":"Improving fatigue resistance of translucent 4Y-PSZ zirconia through glass gradation.","authors":"Felipe Machado Souza, Larissa M M Alves, Edisa O Sousa, Tiago Moreira Bastos Campos, Giovana Assis Marcolino, Mariana Miranda de Toledo Piza, Rainã S Dias, Satoshi Yamaguchi, Petra C Gierthmuehlen, Lukasz Witek, Paulo G Coelho, Estevam A Bonfante, Ernesto B Benalcazar-Jalkh","doi":"10.1111/eos.70101","DOIUrl":"https://doi.org/10.1111/eos.70101","url":null,"abstract":"To evaluate the effect of graded glass infiltration on the fatigue behavior and mechanical reliability of translucent 4Y-PSZ zirconia before and after hydrothermal aging, disc-shaped specimens were fabricated by uniaxial pressing and divided into control and glass-graded groups (n = 36/group). Glass infiltration was performed on pre-sintered specimens followed by final sintering, and half of the specimens from each group underwent hydrothermal aging (134°C, 2.2 bar, 20 h). Microstructure and phase composition were assessed by scanning electron microscopy and x-ray diffraction. Mechanical performance was evaluated using step-stress accelerated life testing, with Weibull statistics, reliability analysis, and inverse power-law modeling. Glass-graded specimens demonstrated higher reliability and characteristic strength (≈330 MPa increase) with similar Weibull modulus compared to controls. The inverse power-law parameter α0 was higher for the glass-graded group, indicating extended fatigue life, whereas comparable α1 values suggested similar life-stress relationships. Hydrothermal aging did not significantly affect mechanical performance, although phase transformation occurred in the control group. Fractography revealed surface-initiated failures in controls and interface-related crack initiation in glass-graded specimens. Graded glass infiltration improved the fatigue reliability and characteristic strength without compromising hydrothermal stability of 4Y-PSZ. These results suggest that glass-graded 4Y-PSZ may expand the clinical applicability of translucent zirconia for long-span (≥4-unit) prosthetic reconstructions.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70101"},"PeriodicalIF":1.8,"publicationDate":"2026-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147812737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The association between oral health clusters and oral health-related quality of life: A population‑based study of 5‑yr‑old children. 口腔健康集群与口腔健康相关生活质量之间的关系：一项以5岁儿童为基础的人群研究

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-04-30 DOI: 10.1111/eos.70100

Pedro Henrique Duarte França de Castro, Maria Augusta Bessa Rebelo, Mario Vianna Vettore

{"title":"The association between oral health clusters and oral health-related quality of life: A population‑based study of 5‑yr‑old children.","authors":"Pedro Henrique Duarte França de Castro, Maria Augusta Bessa Rebelo, Mario Vianna Vettore","doi":"10.1111/eos.70100","DOIUrl":"https://doi.org/10.1111/eos.70100","url":null,"abstract":"This study aimed to describe oral health clusters that combine dental conditions and perceived oral health and to examine the association of oral health indicators and their clusters with oral health-related quality of life (OHRQoL) in 5-yr-old children. This cross-sectional study analysed data from 4354 5-yr-old children participating in the Brazilian National Oral Health Survey (SB Brasil 2023). Oral health assessment included decayed, missing and filled teeth; clinical consequences of untreated dental caries (pufa index); malocclusion; perceived oral health; and OHRQoL (SOHO-5). Latent profile analysis was performed to identify oral health clusters, and regression models examined associations between clusters, oral health indicators and OHRQoL. Four distinct clusters emerged: healthy teeth and very good/good perceived oral health (56.3%), restored teeth and good/fair perceived oral health (8.9%), high caries and good/fair perceived oral health (24.9%) and high caries/high pufa and fair/poor perceived oral health (9.9%). Oral health indicators (except malocclusion) and oral health clusters were associated with worse OHRQoL, but cluster-based associations were stronger. Children in clusters with high caries, pufa and poor perceived oral health showed markedly poorer OHRQoL across all domains. This approach may explain OHRQoL better than oral health indicators, providing a more nuanced understanding of oral health disparities.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70100"},"PeriodicalIF":1.8,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147765958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of aging on healing of mandibular tooth extraction socket in a rat model. 衰老对大鼠下颌拔牙槽愈合的影响。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-04-30 DOI: 10.1111/eos.70099

Kyung Su Shin, Han Wool Kwak, Jong-Seong Chae, Si-On Choi, Suah Han, Hwa Young Yu, Dae Ho Leem, Hyun Seok

{"title":"Effect of aging on healing of mandibular tooth extraction socket in a rat model.","authors":"Kyung Su Shin, Han Wool Kwak, Jong-Seong Chae, Si-On Choi, Suah Han, Hwa Young Yu, Dae Ho Leem, Hyun Seok","doi":"10.1111/eos.70099","DOIUrl":"https://doi.org/10.1111/eos.70099","url":null,"abstract":"This study evaluated the effect of aging on bone regeneration in mandibular extraction sockets. Male Sprague-Dawley rats were divided into three age groups: 2-month-old (2 M, n = 6), 10-month-old (10 M, n = 6), and 18-month-old (18 M, n = 5). Two weeks post-extraction, comprehensive analyses were performed using micro-computed tomography (µ-CT), serum bone turnover markers, histology, and immunohistochemistry. Notably, to ensure accurate volumetric assessment, a specific tooth-based region of interest utilizing the extracted tooth was employed for precise µ-CT analysis. Radiologically, the 18 M group exhibited significantly reduced bone volume and trabecular thickness compared to the younger groups. Serum analysis revealed that younger rats maintained higher baseline metabolic activity, specifically regarding osteocalcin and CTX-I, and exhibited a distinct post-extraction tartrate-resistant acid phosphatase 5b response. Histological and immunohistochemical findings corroborated these results; the 10 M group demonstrated the most favorable bone regeneration with maximal alkaline phosphatase expression filling the socket, whereas the 18 M group exhibited compromised healing characterized by empty sockets and inflammatory cell accumulation. In conclusion, aging significantly deteriorates the biological healing capacity of alveolar bone. Although younger animals exhibit robust metabolic responses and bone formation, senescent rats show a marked decline in regenerative potential, emphasizing the need for age-specific considerations in dental rehabilitation.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70099"},"PeriodicalIF":1.8,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147765900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of in-office bleaching on the color stability of bulk-fill resin composites immersed in staining beverages. 室内漂白对浸泡在染色饮料中的大块填充树脂复合材料颜色稳定性的影响。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-04-29 DOI: 10.1111/eos.70097

Matheus Kury, Thaís T Feldens, Márcia V G B Queiroz, Mayara A P Oliveira, Luciano S Gonçalves, Maria Carolina G Erhardt

{"title":"Effect of in-office bleaching on the color stability of bulk-fill resin composites immersed in staining beverages.","authors":"Matheus Kury, Thaís T Feldens, Márcia V G B Queiroz, Mayara A P Oliveira, Luciano S Gonçalves, Maria Carolina G Erhardt","doi":"10.1111/eos.70097","DOIUrl":"https://doi.org/10.1111/eos.70097","url":null,"abstract":"This study evaluated the impact of in-office bleaching on color stability of bulk-fill composites submitted to staining. Bulk-fill (Aura, Opus, and Filtek One) and nanofilled (Filtek Z350) composite specimens were submitted to the following: control (CT); bleaching and immersion in distilled water (BL); and bleaching with daily 15-min immersion in coffee (BL + CF), cola-based drink (BL + CO), or red wine (BL + RW) among sessions. A spectrophotometer determined ΔE00, ΔWID, and coordinates. Degree of conversion (DC) and topography of the composites were assessed using Fourier-transform infrared spectroscopy in attenuated total reflectance (FTIR-ATR) and scanning electron microscopy (SEM), respectively. Quantitative data were submitted to statistical tests according to the factors (α = 5%). In BL, Opus and Aura displayed significantly higher ΔE00 and ΔWID than One. Compared to BL, only BL + CF significantly decreased the ΔWID and ΔL for Aura, but all staining immersions decreased ΔWID and ΔL for Opus. One and Z350 were not impacted by treatments, except for BL + CF, which significantly decreased ΔWID and ΔL. SEM revealed influence of cycling on composites' surface, but DC did not determine their staining resistance. In-office bleaching compromised bulk-fill composite color stability, with Aura and Opus showing unacceptable changes, whereas Filtek One and Z350XT remained acceptable. Staining challenges altered Opus stability, and coffee immersion affected colorimetric outcomes across all composites after bleaching.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70097"},"PeriodicalIF":1.8,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147765937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of sagittal and vertical changes after en masse and two-step retraction using mini-implant anchorage: A randomized controlled trial. 微型种植体支抗整体和两步内收后矢状面和垂直面变化的比较：一项随机对照试验。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-04-20 DOI: 10.1111/eos.70094

Anam Sattar, Sadia Shabbir, Hana Pervez, Sameer Uddin Shaikh, Sadia Rizwan, Imtiaz Ahmed

{"title":"Comparison of sagittal and vertical changes after en masse and two-step retraction using mini-implant anchorage: A randomized controlled trial.","authors":"Anam Sattar, Sadia Shabbir, Hana Pervez, Sameer Uddin Shaikh, Sadia Rizwan, Imtiaz Ahmed","doi":"10.1111/eos.70094","DOIUrl":"https://doi.org/10.1111/eos.70094","url":null,"abstract":"This parallel two-arm randomized trial assessed skeletal changes following en masse and two-step anterior retraction using mini-implants. Of 110 patients screened, 14 were excluded due to ineligibility or refusal, leaving 96 participants randomized equally into two groups (48 each). All received the assigned intervention. During follow-up, 16 participants were lost because of bracket debonding, mini-implant failure, or discontinuation, resulting in 80 subjects (40 per group) included in the final analysis. All patients were treated with pre-adjusted edgewise appliances. After alignment and leveling, bilateral mini-implants were inserted between the maxillary second premolars and first molars, followed by extraction of the maxillary first premolars. Retraction was carried out according to group allocation either en masse or two-step. Lateral cephalograms taken before treatment and after incisor retraction were used to evaluate skeletal changes. Data were expressed as mean and standard deviation, with Wilcoxon signed-rank and Mann-Whitney U-tests applied for intra- and intergroup comparisons. Both methods produced significant sagittal and vertical changes. Although the two-step approach showed slightly greater maxillary retraction and ANB reduction, these differences likely related to baseline variation and biomechanics rather than true superiority. Vertical parameters increased in both groups, indicating posterior mandibular rotation, suggesting both techniques are equally effective.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70094"},"PeriodicalIF":1.8,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147722132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Post-curing effects on mechanical properties staining resistance of a 3D-printed resin versus a direct composite for definitive restorations. 固化后对机械性能的影响3d打印树脂与直接复合材料的抗染色性修复。

IF 1.8 4区医学

European Journal of Oral Sciences Pub Date : 2026-04-20 DOI: 10.1111/eos.70093

Bianca Rossi, Arthur Henrique Marques Massarenti, Giulia Gamero Pizzanelli, Márcia Valéria Gualberto Barbosa de Queiroz, Filipe Milazzo Dos Santos, Matheus Kury, Adriano Fonseca Lima

{"title":"Post-curing effects on mechanical properties staining resistance of a 3D-printed resin versus a direct composite for definitive restorations.","authors":"Bianca Rossi, Arthur Henrique Marques Massarenti, Giulia Gamero Pizzanelli, Márcia Valéria Gualberto Barbosa de Queiroz, Filipe Milazzo Dos Santos, Matheus Kury, Adriano Fonseca Lima","doi":"10.1111/eos.70093","DOIUrl":"https://doi.org/10.1111/eos.70093","url":null,"abstract":"This study evaluated the mechanical performance and staining resistance of a three-dimensional (3D)-printed resin (VarseoSmile Crown Plus) subjected to different post-curing times (0, 5, 10, 15, and 20 min), compared with a conventional nanofilled resin composite (Filtek Z350XT). Specimens of both materials were fabricated and tested for flexural strength and flexural modulus using a three-point bending test, whereas cohesive strength (CS) was assessed by microtensile testing. For color analysis, disk specimens were immersed in artificial saliva, Coca-Cola, or red wine (RW) for 7 days, followed by polishing and whitening procedures. Color change (ΔE00) and whiteness index (ΔWID) were recorded. Data were analyzed using a generalized linear model and Bonferroni tests (α = 5%). The direct composite showed higher flexural and CS than the 3D-printed resin. Post-curing improved the mechanical properties of the printed material, although values remained inferior to those of the composite. Both materials exhibited color changes after staining, with RW causing the greatest discoloration. Polishing and whitening reduced staining but did not always restore baseline values. Although post-curing enhances 3D-printed resin performance, its mechanical behavior and color stability remain inferior to those of conventional composites, indicating the need for further optimization before clinical use as definitive restorations.","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":" ","pages":"e70093"},"PeriodicalIF":1.8,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147722128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0