Journal of dentistry最新文献_第3页

The health impacts of dental amalgam and alternative restorative materials: a systematic review. 牙科汞合金和替代修复材料对健康的影响：系统综述。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-03 DOI: 10.1016/j.jdent.2026.106530

Liz Shaw, Hassanat Mojirola Lawal, Simon Briscoe, Clara Martin Pintado, Noreen Orr, Lauren Asare, G J Melendez-Torres, Ruth Garside, Jo Thompson Coon

Objective: Conduct a systematic review of quantitative evidence comparing the adverse health impacts of dental amalgam versus other dental restorative materials.

Data sources: Bibliographic database searches, limited by a date of 2007 and English language, were supplemented by citation chasing, searches of Google Search and checking topically similar systematic reviews.

Study selection: We sought empirical studies evaluating the health impacts of materials used for direct dental restorations. Two reviewers independently conducted title and abstract and full-text screening. Data extraction and quality appraisal using the Effective Public Health Practice Project Tool were carried out by one reviewer and checked by a second. We used narrative synthesis to group studies by restorative material and health impact evaluated.

Conclusions: 195 studies (245 articles) were included, with 61 studies (87 articles) prioritised for narrative synthesis. Studies evaluated a variety of health impacts for the following restorative materials: amalgam versus composite: (n=6), amalgam only (n=52), resin-based composite (RBC) only (n=16), glass ionomer versus RBC (n=3). Both amalgam and non-amalgam materials may be associated with various health impacts. However, confidence in these findings is limited due to the small quantity of direct comparative evidence and heterogeneity of outcome measure and findings within health impact categories. Findings of this review may support policy makers and researchers to identify and address future research needs.

Clinical significance: Findings highlight what is known regarding the comparative health impacts of different restorative materials, which may inform clinical decision-making alongside consideration of international guidelines, cost, material longevity, potential environmental impacts and patient-preference.

目的：对定量证据进行系统回顾，比较牙科汞合金与其他牙科修复材料对健康的不良影响。数据来源：书目数据库搜索，限于2007年的日期和英语，辅以引文追踪，谷歌搜索和检查主题相似的系统评论。研究选择：我们寻求评估直接牙齿修复材料对健康影响的实证研究。两位审稿人独立进行了标题、摘要和全文筛选。使用有效公共卫生实践项目工具进行数据提取和质量评估由一名审稿人进行，并由另一名审稿人进行检查。我们采用叙述性综合方法对恢复性材料和健康影响进行评估。结论：纳入195项研究（245篇文章），其中61项研究（87篇文章）优先用于叙事综合。研究评估了下列修复材料对健康的各种影响：汞合金与复合材料（n=6）、纯汞合金（n=52）、纯树脂基复合材料（n=16）、玻璃离子与RBC （n=3）。汞合金和非汞合金材料都可能与各种健康影响有关。然而，由于直接比较证据的数量较少，以及在健康影响类别中结果测量和结果的异质性，对这些发现的信心有限。本综述的发现可能支持决策者和研究人员确定和解决未来的研究需求。临床意义：研究结果强调了已知的不同修复材料对健康的比较影响，这可能为临床决策提供信息，同时考虑国际指南、成本、材料寿命、潜在环境影响和患者偏好。

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引用次数: 0

Over-the-counter whitening strips: Evaluation of color change and hydrogen peroxide penetration into a pulp chamber 非处方美白条：评价颜色变化和过氧化氢进入牙髓腔。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-03 DOI: 10.1016/j.jdent.2026.106544

Emanuel Adriano Hul , Michael Willian Favoreto , Laryssa Mylenna Madruga Barbosa , Deisy Cristina Ferreira Cordeiro , Gabrielle Gomes Centenaro , Christiane Philippini Ferreira Borges , Alessandra Reis , Alessandro D. Loguercio

Objectives

To evaluate the color change (CC) and hydrogen peroxide (HP) penetration into the pulp chamber of extracted teeth subjected to different commercial whitening strips, as well as the pH stability and surface morphology induced by these products.

Materials and Methods

Ninety-six premolars were randomly allocated into six groups: (1) NC, negative control (no bleaching); (2) UP, Up&Up™ Timeless White Whitening Strips; (3) LX, Lumineux® Whitening Strips; (4) CT, Crest® 3DWhitestrips™; (5) WG, Walgreens® Ultra Whitening Strips; and (6) PC, positive control (6% HP, FGM WhiteClass). CC was measured using digital spectrophotometry before treatment and 14 days post-bleaching (ΔL*, Δa*, Δb*, ΔE_ab, ΔE_00,and ΔWI_D). HP penetration into the pulp chamber was analyzed using UV–Vis spectrophotometry, pH stability was measured with a pH meter, and surface morphology by scanning electron microscopy. Statistical analysis was performed using one-way ANOVA, followed by Tukey’s post hoc test (α = 0.05).

Results

PC, CT, and UP showed higher ΔE_ab, ΔE₀₀, and ΔWI_D values than LX and NC. Color change was mainly driven by reductions in Δb*. HP was detected in the pulp chamber of PC, CT, and UP, with the highest levels in PC; no HP was detected in LX and NC. Only LX maintained stable pH. SEM analysis showed preserved enamel surface morphology in all groups.

Conclusion

HP–containing whitening strips promoted clinically relevant color changes with lower pulp chamber penetration than the at-home bleaching gel, despite a pH decrease. Peroxide-free strips were ineffective and showed no HP penetration.

Clinical relevance

Over-the-counter whitening strips vary in effectiveness and biological behavior according to their composition. HP-containing strips may offer effective whitening with a more conservative diffusion profile, while peroxide-free products may not achieve clinically meaningful results.

目的：评价不同商品美白条对拔牙牙体的颜色变化（CC）和过氧化氢（HP）对牙体髓腔的渗透，以及美白条对拔牙体pH稳定性和表面形貌的影响。材料与方法：96颗前磨牙随机分为6组：(1)阴性对照组（无漂白）；(2) UP， UP & UP™永恒美白贴；(3) LX， Lumineux®美白贴片；(4) CT, Crest®3dwhitstripes™；(5) WG，沃尔格林®超美白贴片；(6) PC，阳性对照（6% HP，女性生殖器切割WhiteClass）。在治疗前和漂白后14天使用数字分光光度法测定CC （ΔL*， Δa*， Δb*， ΔEab， ΔE00和ΔWID）。用紫外-可见分光光度法分析HP对浆腔的渗透，用pH计测定pH稳定性，用扫描电镜测定表面形貌。采用单因素方差分析进行统计分析，并进行Tukey事后检验（α = 0.05）。结果：PC、CT、UP的ΔEab、ΔE00、ΔWID值高于LX、NC。颜色变化主要是由于Δb*的减少。HP在PC、CT和UP的髓腔中检测到，其中PC的水平最高；LX和NC未检测到HP。只有LX保持ph稳定，SEM分析显示各组牙釉质表面形态均保存完好。结论：尽管pH值降低，但与家用漂白凝胶相比，含有hp的美白贴促进了临床相关的颜色变化，其牙髓腔渗透性更低。无过氧化物试纸条无效，无HP穿透。临床相关性：非处方美白贴片的有效性和生物学行为因其成分而异。含有hp的贴片可能提供更保守的扩散轮廓的有效美白，而无过氧化物的产品可能无法达到有临床意义的结果。

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引用次数: 0

Evaluation of developmental defects of enamel and differential diagnosis from dental caries using quantitative light-induced fluorescence technology: A cross-sectional investigation 定量光诱导荧光技术评价牙釉质发育缺陷与龋病鉴别诊断的横断面研究。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-03 DOI: 10.1016/j.jdent.2026.106546

Seong Joon Lee , Hyung-Jun Choi , Jaeho Lee , Je Seon Song , Ko Eun Lee , Chung-Min Kang

Objectives

Dental caries and developmental defects of enamel (DDE) are common conditions that impact oral health. Quantitative light-induced fluorescence (QLF) is widely used for detecting dental caries, but its ability to identify DDE remains unclear. This study aimed to investigate fluorescence differences among sound, carious, and DDE-affected teeth using QLF, and to differentiate white hypomineralization from incipient caries.

Methods

Data from 704 teeth in 137 patients under 20 years old were analyzed. QLF images were acquired, and fluorescence parameters were measured. Statistical tests included Chi-square, Fisher’s exact, Mann–Whitney, Kruskal–Wallis, Linear mixed-effects models, and receiver operating characteristic (ROC) analyses.

Results

ΔF values progressively decreased and ΔR values increased from sound to DDE-affected to carious teeth (p < 0.001). Within DDE, fluorescence changes differed significantly according to defect subtype, with combined defects showing the greatest mineral loss and bacterial activity (p < 0.001 for ΔF, p = 0.008 for ΔR). White hypomineralization showed higher ΔF values and lower ΔR values than yellow/brown hypomineralization (p < 0.001). Significant fluorescence differences were observed between white hypomineralization and International Caries Detection and Assessment System scores 1 and 2 lesions (p < 0.001). ROC analysis revealed excellent accuracy for distinguishing white hypomineralization from incipient caries, with areas under the curve of 0.970 for ΔF mean and 0.979 for ΔR mean. The optimal cutoff values were −7.65 for ΔF mean and 23.50 for ΔR mean, respectively.

Conclusions

QLF provides effective quantitative support for differentiating DDE from incipient caries.

Clinical Significance

Quantitative light-induced fluorescence provides objective parameters for differentiating developmental defects of enamel from incipient dental caries. By offering quantitative cutoff values, this approach supports more accurate diagnosis of clinically ambiguous white spot lesions, reduces the risk of overtreatment, and facilitates prevention-oriented and minimally invasive treatment planning in routine dental practice.

目的：龋病和牙釉质发育缺陷（DDE）是影响口腔健康的常见疾病。定量光诱导荧光（QLF）被广泛用于检测龋病，但其识别DDE的能力尚不清楚。本研究旨在利用QLF研究健全、龋齿和dde影响牙齿的荧光差异，并区分白色低矿化和早期龋齿。方法：对137例20岁以下患者704颗牙齿资料进行分析。获得QLF图像，并测量荧光参数。统计检验包括卡方、Fisher’s exact、Mann-Whitney、Kruskal-Wallis、线性混合效应模型和受试者工作特征（ROC）分析。结果：从健全到dde影响再到龋齿，ΔF值逐渐降低，ΔR值逐渐升高（p < 0.001）。在DDE中，不同缺陷亚型的荧光变化差异显著，综合缺陷显示最大的矿物质损失和细菌活性（ΔF p < 0.001， ΔR p = 0.008）。白色低矿化的ΔF值高于黄色/棕色低矿化，ΔR值低于黄色/棕色（p < 0.001）。白色低矿化与国际龋齿检测和评估系统评分1分和2分之间的荧光差异显著（p < 0.001）。ROC分析显示，区分白色低矿化和早期龋的准确度很高，曲线下面积ΔF平均值为0.970，ΔR平均值为0.979。最佳截断值ΔF均值为-7.65，ΔR均值为23.50。结论：QLF为鉴别DDE与早期龋提供了有效的定量支持。临床意义：定量光致荧光为鉴别牙釉质发育缺陷和早期龋提供了客观参数。通过提供定量的临界值，该方法可以更准确地诊断临床上模棱两可的白斑病变，减少过度治疗的风险，并有助于在常规牙科实践中制定以预防为导向的微创治疗计划。

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引用次数: 0

Clinical acceptability and repeatability of three-dimensional maxillary positioning following orthognathic surgical wafer placement: An in vitro study 临床可接受性和可重复性的三维上颌定位后正颌手术晶片置入：在口腔内扫描仪和传统的印模工作流程下的体外研究。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-02 DOI: 10.1016/j.jdent.2026.106536

Eun-Hack Andrew Choi , Yunji Shin , Jae-Hun Yu , Jeenyoung Kim , Utkarsh Mangal , Jun-Young Kim , Sung-Hwan Choi

Objectives

To quantify the three-dimensional (3D) deviation between planned and achieved maxillary positions after transfer using a surgical wafer under in vitro conditions, and assess clinical acceptability and repeatability for each workflow.

Methods

A bracketed typodont mounted on a mannequin was used to define three groups—Conventional (alginate impressions/plaster casts/laboratory scanning), Trios (Trios 3 intraoral scanner (IOS)), and Prime (Primescan IOS)—each with 10 technical replicates. For each replicate, virtual surgical planning was performed, a wafer was designed and 3D-printed, and the maxilla was positioned; 3D deviation was quantified as: (1) point-based 3D positional deviation (three landmarks) and (2) matrix-based 3D translational and rotational deviations. Clinical acceptability was defined as the proportion of the 10 replicates per group with 3D deviation within predefined clinical tolerance limits (0.5 mm for positional/translational; 1.0° for rotational). Repeatability was summarized by the repeatability standard deviation (s_r) as specified in ISO 5725.

Results

The Trios and Prime groups achieved 100% clinical acceptability across all 3D deviations. In the Conventional group, acceptability was 90% for the anterior landmark’s positional and translational deviation, with all others achieving 100%. The s_r was 0.13–0.20 mm (positional), 0.23 mm (translational), and 0.22° (rotational) for the Conventional group; 0.04–0.13 mm, 0.06 mm, and 0.24° for the Trios group; 0.04–0.10 mm, 0.11 mm, and 0.17° for the Prime group.

Conclusion

Under in vitro conditions, the demonstrated clinical acceptability and repeatability provide preliminary evidence supporting the clinical feasibility of a fully digital IOS-based workflow for wafer-mediated maxillary positioning.

Clinical significance

An IOS–based workflow can be considered clinically feasible for wafer-mediated maxillary positioning without compromising accuracy, as evaluated in terms of clinical acceptability and repeatability, while potentially eliminating impression-taking and cast fabrication steps.

目的：量化在体外条件下使用手术硅片转移后计划和实际上颌位置之间的三维（3D）偏差，并评估每个工作流程的临床可接受性和可重复性。方法：使用安装在人体模型上的带支架的排印器定义三组-常规（海藻酸盐印模/石膏模型/实验室扫描），Trios （Trios 3口内扫描仪（IOS））和Prime (Primescan IOS)-每组有10个技术重复。对于每个重复，进行虚拟手术计划，设计并3d打印晶片，定位上颌骨；将三维偏差量化为：(1)基于点的三维位置偏差（三个地标）和(2)基于矩阵的三维平移和旋转偏差。临床可接受度定义为每组10个重复的3D偏差在预定义的临床公差范围内的比例（位置/平移0.5 mm；旋转1.0°）。重复性用ISO 5725中规定的重复性标准偏差（sr）来概括。结果：Trios组和Prime组在所有3D偏差中均达到100%的临床可接受性。在常规组中，前标志点的位置和平移偏差的可接受性为90%，其余均为100%。常规组的sr为0.13-0.20 mm（位置）、0.23 mm（平移）和0.22°（旋转）；Trios组为0.04 ~ 0.13 mm、0.06 mm、0.24°；Prime组为0.04-0.10 mm, 0.11 mm, 0.17°。结论：在体外条件下，临床可接受性和可重复性为基于ios的全数字化晶圆介导上颌定位工作流程的临床可行性提供了初步证据。临床意义：根据临床可接受性和可重复性进行评估，基于ios的工作流程可以在不影响准确性的情况下用于晶圆介导的上颌定位，同时可能消除印模和铸造制造步骤。

{"title":"Clinical acceptability and repeatability of three-dimensional maxillary positioning following orthognathic surgical wafer placement: An in vitro study","authors":"Eun-Hack Andrew Choi , Yunji Shin , Jae-Hun Yu , Jeenyoung Kim , Utkarsh Mangal , Jun-Young Kim , Sung-Hwan Choi","doi":"10.1016/j.jdent.2026.106536","DOIUrl":"10.1016/j.jdent.2026.106536","url":null,"abstract":"<div><h3>Objectives</h3><div>To quantify the three-dimensional (3D) deviation between planned and achieved maxillary positions after transfer using a surgical wafer under <em>in vitro</em> conditions, and assess clinical acceptability and repeatability for each workflow.</div></div><div><h3>Methods</h3><div>A bracketed typodont mounted on a mannequin was used to define three groups—Conventional (alginate impressions/plaster casts/laboratory scanning), Trios (Trios 3 intraoral scanner (IOS)), and Prime (Primescan IOS)—each with 10 technical replicates. For each replicate, virtual surgical planning was performed, a wafer was designed and 3D-printed, and the maxilla was positioned; 3D deviation was quantified as: (1) point-based 3D positional deviation (three landmarks) and (2) matrix-based 3D translational and rotational deviations. Clinical acceptability was defined as the proportion of the 10 replicates per group with 3D deviation within predefined clinical tolerance limits (0.5 mm for positional/translational; 1.0° for rotational). Repeatability was summarized by the repeatability standard deviation (s<sub>r</sub>) as specified in ISO 5725.</div></div><div><h3>Results</h3><div>The Trios and Prime groups achieved 100% clinical acceptability across all 3D deviations. In the Conventional group, acceptability was 90% for the anterior landmark’s positional and translational deviation, with all others achieving 100%. The s<sub>r</sub> was 0.13–0.20 mm (positional), 0.23 mm (translational), and 0.22° (rotational) for the Conventional group; 0.04–0.13 mm, 0.06 mm, and 0.24° for the Trios group; 0.04–0.10 mm, 0.11 mm, and 0.17° for the Prime group.</div></div><div><h3>Conclusion</h3><div>Under <em>in vitro</em> conditions, the demonstrated clinical acceptability and repeatability provide preliminary evidence supporting the clinical feasibility of a fully digital IOS-based workflow for wafer-mediated maxillary positioning.</div></div><div><h3>Clinical significance</h3><div>An IOS–based workflow can be considered clinically feasible for wafer-mediated maxillary positioning without compromising accuracy, as evaluated in terms of clinical acceptability and repeatability, while potentially eliminating impression-taking and cast fabrication steps.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106536"},"PeriodicalIF":5.5,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146119105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of cigarette smoke and Tobacco Heating System aerosol on discoloration and staining of ceramic and composite veneers 香烟烟雾和烟草加热系统气溶胶对陶瓷和复合贴面变色和染色的影响。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-02 DOI: 10.1016/j.jdent.2026.106543

Qirong Huang , Xiaoyi Zhao , Shoaib Majeed , Sophie Scheuner , Caroline Favre , Sandra Ferreira , Filippo Zanetti , Giuseppe Lo Sasso , Yanfang Ren

Objectives

To compare the effects of conventional cigarette smoke (CS) and Tobacco Heating System (THS) aerosol on surface staining and discoloration of ceramic and composite veneers using a clinically relevant in vitro model. Methods: Forty-six human premolars were restored with either lithium-disilicate ceramic or direct composite veneers and assembled in an in vitro setup model simulating adjacent teeth and gingiva. Specimens were randomly assigned to a 3-week exposure to CS or THS aerosol. Following each daily exposure, specimens were brushed with a standard toothpaste. Color change (ΔE00) and whiteness index for dentistry (WID) were measured spectrophotometrically at baseline and weeks 1, 2, and 3 after exposure. Surface staining was scored in the gingival, mesial, distal, and body areas using a modified Lobene stain index, and cervical marginal discoloration was evaluated with modified USPHS criteria. Results: Composite veneers exposed to CS showed significantly more post-brushing discoloration (ΔE00≈ 4.0; ΔWID≈ –7.2) than ceramic veneers. THS exposure caused minimal color change in both veneer types. Surface staining was consistently greater after CS than THS exposure, but accumulated over time, even with THS, especially at interproximal and gingival regions. Cervical marginal discoloration was significantly higher in CS-exposed specimens for both veneer types. Conclusions: Cigarette smoke leads to composite veneer discoloration exceeding the clinically perceptible threshold (ΔE00 > 2.25) and more severe marginal and interproximal staining than THS aerosol. When routine brushing was included, ceramic veneers showed high color stability under both exposures. Although THS induces less veneer discoloration than CS, meticulous interdental hygiene and smoking cessation remain critical for maintaining optimal esthetics. Clinical significance statement: Cigarette smoking leads to discoloration and marginal staining of composite veneers, even with regular brushing, whereas ceramic veneers offer greater color stability. Although heated tobacco aerosol causes less staining than cigarette smoke, both can impact interproximal areas. This highlights the importance of materials selection, hygiene instructions, and smoking cessation counseling.

目的：采用临床相关的体外模型，比较传统香烟烟雾（CS）和烟草加热系统（THS）气溶胶对陶瓷和复合材料贴面表面染色和变色的影响。方法：采用二硅酸锂陶瓷或直接复合贴面修复46颗人类前磨牙，并在模拟邻牙和牙龈的离体模型中组装。样本被随机分配到接触CS或三手烟气溶胶3周的组。每天暴露后，用标准牙膏刷标本。在基线和暴露后1、2和3周，分光光度法测量牙科的颜色变化（ΔE00）和白度指数（WID）。使用改良的Lobene染色指数对牙龈、中、远端和身体区域的表面染色进行评分，并使用改良的USPHS标准评估宫颈边缘变色。结果：与陶瓷贴面相比，复合贴面接触CS后出现明显的刷后变色（ΔE00≈4.0；ΔWID≈-7.2）。三手烟暴露导致两种贴面类型的颜色变化很小。CS后的表面染色始终大于三手烟，但随着时间的推移而积累，即使是三手烟，特别是在近端间和牙龈区域。两种贴面类型的cs暴露标本的宫颈边缘变色明显更高。结论：香烟烟雾导致复合贴面变色超过临床可感知阈值（ΔE00 > 2.25），边缘和近端间染色比三手烟气溶胶更严重。当包括常规涂刷时，陶瓷贴面在两种暴露下都表现出高的颜色稳定性。虽然与CS相比，这种方法引起的贴面变色较少，但细致的牙间卫生和戒烟仍然是保持最佳美学的关键。临床意义声明：吸烟导致复合贴面变色和边缘染色，即使定期刷牙，而陶瓷贴面具有更好的颜色稳定性。虽然加热的烟草气溶胶比香烟烟雾造成的染色少，但两者都可以影响近端间区域。这突出了Aries系统公司的Powered by Editorial Manager®和production Manager®材料选择，卫生说明和戒烟咨询的重要性。

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引用次数: 0

Evaluation of the 5-year clinical efficacy of cross-arch fixed dental prostheses as periodontal splints on periodontal tissue stability 十字弓固定义齿作为牙周夹板对牙周组织稳定性的5年临床疗效评价

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-01 DOI: 10.1016/j.jdent.2026.106529

Weijie Wu , Jun Chen , Yan Liu , Ganggang Qi , Chuchu Xu , Xiaoyu Chen , Hongye Lu , Fuming He

Objectives

To investigate the clinical efficacy of the cross-arch fixed dental prostheses as periodontal splints and to identify the key factors influencing its treatment outcomes.

Materials and Methods

Thirty-seven patients with 51 tooth-supported cross-arch prostheses (mean follow-up: 63 months; mean bridge length: 10.24 units) were retrospectively analyzed. Survival rates, complications, alveolar bone level (ABL), probing pocket depth (PPD), bleeding on probing (BoP), plaque index (PI), prosthesis characteristics, and patient satisfaction were documented at baseline (T0), 1 year (T1), 3 years (T2) and 5 years (T3) after loading. Cumulative survival rates (CSRs) were calculated using Kaplan-Meier curves. Risk factors for changes in PPD (ΔPPD) and alveolar bone level (ΔABL) were screened by univariate analyses and assessed using multivariable generalized linear and logistic regression models.

Results

Five-year prosthesis survival was 95.16% (100% at 1- and 3-year). PPD decreased significantly from T0 (3.84 ± 0.81 mm) to T1 (3.26 ± 0.92 mm) and T2 (3.33 ± 0.84 mm; p < 0.05), while ABL remained clinically stable, and BoP and PI were maintained at low levels throughout the study period. Quadrilateral abutment configuration was significantly associated with reduced bone loss (β = -0.551, p = 0.002) and reduced ΔPPD (β = -0.704, p < 0.001). Bilateral terminal abutment prostheses (β = -0.389, p = 0.013) also showed a protective effect on ΔPPD. Patient satisfaction remained high (p > 0.05).

Conclusion

Cross-arch fixed prostheses provided predictable periodontal stabilization with high survival rates. Periodontal maintenance and prosthetic design are key determinants of outcomes.

Clinical significance

Tooth-supported cross-arch prostheses achieved long-term survival and maintained periodontal parameters in Stage III/IV periodontitis, supporting their use as long-span splints when properly planned and maintained. Abutment distribution and strict supportive periodontal care were key determinants, guiding prosthetic design and follow-up.

目的：探讨十字弓固定义齿作为牙周夹板的临床疗效，探讨影响其治疗效果的关键因素。材料与方法：回顾性分析37例51根牙支撑交叉弓修复体患者，平均随访63个月，平均桥长10.24个单位。在装填后的基线（T0）、1年（T1）、3年（T2）和5年（T3）记录了生存率、并发症、牙槽骨水平（ABL）、探诊袋深度（PPD）、探诊出血（BoP）、斑块指数（PI）、假体特征和患者满意度。累积生存率（CSRs）采用Kaplan-Meier曲线计算。通过单因素分析筛选PPD （ΔPPD）和牙槽骨水平（ΔABL）变化的危险因素，并使用多变量广义线性和逻辑回归模型进行评估。结果：5年假体存活率为95.16%（1年和3年为100%）。PPD从T0（3.84±0.81 mm）降至T1（3.26±0.92 mm）和T2(3.33±0.84 mm, p < 0.05)， ABL保持临床稳定，BoP和PI在整个研究期间维持在较低水平。四边形基台配置与减少骨质流失（β = -0.551,p = 0.002）和减少ΔPPD （β = -0.704,p < 0.001）显著相关。双侧末端基牙修复体对ΔPPD也有保护作用（β = -0.389, p = 0.013）。患者满意度保持较高（p < 0.05）。结论：十字弓固定修复体具有可预测的牙周稳定性和较高的成活率。牙周维护和假体设计是影响预后的关键因素。临床意义：牙支撑交叉弓假体在III/IV期牙周炎患者中实现了长期生存并维持了牙周参数，在适当的计划和维护下支持其作为大跨度夹板的使用。基台分布和严格的牙周支持性护理是指导义齿设计和随访的关键决定因素。

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引用次数: 0

Feasibility and accuracy of a partial point cloud registration method for transoral robot-assisted surgery of zygoma fracture: A phantom study 经口机器人辅助颧骨骨折手术中局部点云配准方法的可行性和准确性：一项模拟研究。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-01 DOI: 10.1016/j.jdent.2026.106533

Hangyu Liu , Bimeng Jie , Chunheng Lu , Haoliang Chen , Junchen Wang , Yang He

Objectives

To propose a novel registration method based on partial point cloud registration for transoral robot-assisted zygoma fracture surgery and validate its accuracy via a phantom study.

Methods

This study comprised two validation phases. 1) Feasibility of partial zygomatic surface point cloud registration. Forty sets of normal CT data were selected from an established normative database. After segmentation and 3D reconstruction of zygoma, point clouds from different exposure ranges on the zygomatic bone surface (Group A: Full Zygomatic Bone Outer Surface; Group B: Area Below Infraorbital Margin; and Group C: Area Below Infraorbital Foramen.) were extracted and registered to the intact zygoma using the Iterative Closest Point (ICP) algorithm. The Fiducial Registration Error (FRE) was computed for each group. 2) Accuracy of partial point cloud registration: 10 pre-operative CT scans of zygomatic fractures were selected. Registration using fiducial markers served as the control (Group A). Using a self-developed and previously validated binocular vision camera and probe, point clouds of different exposure range (Group B1, B2, and B3) on the zygomatic bone surface were collected and registered using ICP algorithm. The accuracy of partial point cloud registration for different zygomatic bone surface areas was comparatively evaluated using both FRE and Target Registration Error (TRE).

Results

Feasibility of partial zygomatic surface point cloud registration: The FRE for Group A, B, and C was 0.16 ± 0.16 mm, 0.18 ± 0.14 mm and 0.22 ± 0.13 mm (P > 0.05). Accuracy of partial point cloud registration: The TRE for Group A, B1, B2, and B3 was 0.47 ± 0.17 mm, 0.70 ± 0.17 mm, 0.70 ± 0.17 mm, 0.86 ± 0.24 mm. (P < 0.001)

Conclusion

The proposed method, based on partial point cloud registration, demonstrated both accuracy and feasibility, offering a foundation for future advancements in transoral robot-assisted surgery of zygoma fracture.

Clinical significance

For transoral robotic-assisted zygoma reduction, the most crucial part is to enable the robot to accurately localize bone fragments following limited surgical exposure. The innovative registration approach based on partial point cloud registration has been proven to possess both accuracy and feasibility, which lays a solid foundation for the future development of transoral robot-assisted surgical techniques in the treatment of zygomatic fractures.

目的：提出一种基于局部点云配准的经口机器人辅助颧骨骨折手术配准方法，并通过模拟实验验证其准确性。方法：本研究分为两个验证阶段。1)部分颧骨面点云配准的可行性。从已建立的规范数据库中选择40组正常CT数据。对颧骨进行分割和三维重建后，提取颧骨表面不同暴露范围的点云（A组：完整颧骨外表面；B组：眶下缘下区域；C组：眶下孔下区域），并采用迭代最近点（ICP）算法对完整颧骨进行配准。计算各组的基准配准误差（FRE）。2)部分点云配准的准确性：选取10例颧骨骨折术前CT扫描。采用基准标记注册作为对照（A组）。使用自行研制并经过验证的双目视觉相机和探头，采集颧骨表面不同曝光范围（B1、B2、B3组）的点云，采用ICP算法进行配准。利用FRE和目标配准误差（Target registration Error， TRE）对不同颧骨表面积的部分点云配准精度进行了比较评价。结果：部分颧面点云配准的可行性：A、B、C组的TRE分别为0.16±0.16 mm、0.18±0.14 mm和0.22±0.13 mm （P < 0.05）。部分点云配准精度：A、B1、B2、B3组的TRE分别为0.47±0.17 mm、0.70±0.17 mm、0.70±0.17 mm、0.86±0.24 mm。结论：基于部分点云配准的方法具有较好的准确性和可行性，为今后经口机器人辅助颧骨骨折手术的进一步发展奠定了基础。临床意义：对于经口机器人辅助颧骨复位，最关键的部分是使机器人能够在有限的手术暴露后准确定位骨碎片。基于部分点云配准的创新配准方法已被证明具有准确性和可行性，为未来经口机器人辅助手术治疗颧骨骨折技术的发展奠定了坚实的基础。

{"title":"Feasibility and accuracy of a partial point cloud registration method for transoral robot-assisted surgery of zygoma fracture: A phantom study","authors":"Hangyu Liu , Bimeng Jie , Chunheng Lu , Haoliang Chen , Junchen Wang , Yang He","doi":"10.1016/j.jdent.2026.106533","DOIUrl":"10.1016/j.jdent.2026.106533","url":null,"abstract":"<div><h3>Objectives</h3><div>To propose a novel registration method based on partial point cloud registration for transoral robot-assisted zygoma fracture surgery and validate its accuracy via a phantom study.</div></div><div><h3>Methods</h3><div>This study comprised two validation phases. 1) Feasibility of partial zygomatic surface point cloud registration. Forty sets of normal CT data were selected from an established normative database. After segmentation and 3D reconstruction of zygoma, point clouds from different exposure ranges on the zygomatic bone surface (Group A: Full Zygomatic Bone Outer Surface; Group B: Area Below Infraorbital Margin; and Group C: Area Below Infraorbital Foramen.) were extracted and registered to the intact zygoma using the Iterative Closest Point (ICP) algorithm. The Fiducial Registration Error (FRE) was computed for each group. 2) Accuracy of partial point cloud registration: 10 pre-operative CT scans of zygomatic fractures were selected. Registration using fiducial markers served as the control (Group A). Using a self-developed and previously validated binocular vision camera and probe, point clouds of different exposure range (Group B1, B2, and B3) on the zygomatic bone surface were collected and registered using ICP algorithm. The accuracy of partial point cloud registration for different zygomatic bone surface areas was comparatively evaluated using both FRE and Target Registration Error (TRE).</div></div><div><h3>Results</h3><div>Feasibility of partial zygomatic surface point cloud registration: The FRE for Group A, B, and C was 0.16 ± 0.16 mm, 0.18 ± 0.14 mm and 0.22 ± 0.13 mm (<em>P</em> > 0.05). Accuracy of partial point cloud registration: The TRE for Group A, B1, B2, and B3 was 0.47 ± 0.17 mm, 0.70 ± 0.17 mm, 0.70 ± 0.17 mm, 0.86 ± 0.24 mm. (<em>P</em> < 0.001)</div></div><div><h3>Conclusion</h3><div>The proposed method, based on partial point cloud registration, demonstrated both accuracy and feasibility, offering a foundation for future advancements in transoral robot-assisted surgery of zygoma fracture.</div></div><div><h3>Clinical significance</h3><div>For transoral robotic-assisted zygoma reduction, the most crucial part is to enable the robot to accurately localize bone fragments following limited surgical exposure. The innovative registration approach based on partial point cloud registration has been proven to possess both accuracy and feasibility, which lays a solid foundation for the future development of transoral robot-assisted surgical techniques in the treatment of zygomatic fractures.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106533"},"PeriodicalIF":5.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Clinical validation of an automated zygomatic implant planning system: An international multicenter study 自动颧骨植入计划系统的临床验证：一项国际多中心研究。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-02-01 DOI: 10.1016/j.jdent.2026.106532

Wenying Wang , Haitao Li , Feng Wang , James Chow , Rubén Davó , Xiaojun Chen , Baoxin Tao , Yiqun Wu

Objective

To validate the performance of a novel automated zygomatic implant (ZI) planning tool (Zygoplanner) in an international multicenter cohort.

Methods

Preoperative computed tomography (CT) scans from 69 patients (276 ZIs) who underwent quad zygomatic implant surgery were retrospectively analyzed using Zygoplanner. Automated ZI plans generated by Zygoplanner were compared with the corresponding clinically placed implants. The comparison metrics included three-dimensional bone-to-implant contact (3D-BIC), Zygoma Anatomy-Guided Approach (ZAGA) classification, safety distances to the orbital rim and the inferior border of the zygoma, inter-implant spacing, surgeon subjective assessments, and a blinded Turing test.

Results

Compared with clinically-proved manual plans, Zygoplanner-based automated ZI plans achieved significantly higher 3D-BIC values (p < 0.001). In the internal dataset, automated plans showed slightly shorter orbital rim distances (4.51 vs 5.71 mm, p = 0.022) but significantly greater distances to the inferior zygomatic border (8.21 vs 7.20 mm, p = 0.015). In the external dataset, Zygoplanner demonstrated significantly larger inter-implant spacing (3.01 vs 1.18 mm, p < 0.001). Despite these differences, ZAGA classifications remained consistent between both groups. Subjective evaluations by experienced surgeons yielded high scores for stability (4.63/5), feasibility (4.51/5), and safety (4.25/5). In the blinded Turing test, Zygoplanner-generated plans were identified as human expert in 65.2 % of cases, significantly exceeds the 50 % random guessing threshold (p = 0.0075).

Conclusion

Zygoplanner automatically generates clinically acceptable quad ZI plans with improved 3D-BIC, which effectively reduces the planning complexity and facilitates better preoperative ZI planning.

Clinical Significance

Zygoplanner shows strong potential to automate and standardize quad zygomatic implant planning, thereby improving surgical predictability and safety while simplifying the planning workflow. Its automated workflow supports more consistent outcomes and may broaden access to advanced zygomatic implant rehabilitation for patients with edentulous maxillae.

目的：在一项国际多中心队列研究中验证一种新型的自动化颧骨植入（ZI）计划工具（Zygoplanner）的性能。方法：使用Zygoplanner对69例（276例）接受颧四头骨植入手术的患者的术前CT扫描结果进行回顾性分析。将Zygoplanner生成的自动ZI计划与相应的临床放置种植体进行比较。比较指标包括三维骨与种植体接触（3D-BIC）、颧骨解剖引导入路（ZAGA）分类、到眶缘（d1）和颧骨下缘（d2）的安全距离、种植体间距、外科医生主观评估和盲法图灵测试。结果：与临床计划相比，Zygoplanner获得了更高的3D-BIC值（p < 0.001）。在内部数据集中，自动计划显示眶缘距离略短（4.51 vs 5.71 mm, p = 0.022），但到颧下缘的距离明显较大（8.21 vs 7.20 mm, p = 0.015）。在外部数据集中，Zygoplanner显示出更大的种植体间距（3.01 vs 1.18 mm, p < 0.001）。尽管存在这些差异，ZAGA分类在两组之间保持一致。由经验丰富的外科医生进行的主观评价在稳定性（4.63/5）、可行性（4.51/5）和安全性（4.25/5）方面获得了高分。在盲法图灵测试中，65.2%的情况下，zygoplanner生成的计划被识别为人类专家，显著超过50%的随机猜测阈值（p = 0.0075）。结论：Zygoplanner通过改进的3D-BIC自动生成临床可接受的四边形ZI计划，有效降低了计划复杂性，便于更好地进行术前ZI计划。临床意义：Zygoplanner在四颧植入计划自动化和标准化方面显示出强大的潜力，从而提高手术的可预测性和安全性，同时简化计划工作流程。它的自动化工作流程支持更一致的结果，并可能扩大对无牙上颌患者进行高级种植康复的途径。

{"title":"Clinical validation of an automated zygomatic implant planning system: An international multicenter study","authors":"Wenying Wang , Haitao Li , Feng Wang , James Chow , Rubén Davó , Xiaojun Chen , Baoxin Tao , Yiqun Wu","doi":"10.1016/j.jdent.2026.106532","DOIUrl":"10.1016/j.jdent.2026.106532","url":null,"abstract":"<div><h3>Objective</h3><div>To validate the performance of a novel automated zygomatic implant (ZI) planning tool (Zygoplanner) in an international multicenter cohort.</div></div><div><h3>Methods</h3><div>Preoperative computed tomography (CT) scans from 69 patients (276 ZIs) who underwent quad zygomatic implant surgery were retrospectively analyzed using Zygoplanner. Automated ZI plans generated by Zygoplanner were compared with the corresponding clinically placed implants. The comparison metrics included three-dimensional bone-to-implant contact (3D-BIC), Zygoma Anatomy-Guided Approach (ZAGA) classification, safety distances to the orbital rim and the inferior border of the zygoma, inter-implant spacing, surgeon subjective assessments, and a blinded Turing test.</div></div><div><h3>Results</h3><div>Compared with clinically-proved manual plans, Zygoplanner-based automated ZI plans achieved significantly higher 3D-BIC values (<em>p</em> < 0.001). In the internal dataset, automated plans showed slightly shorter orbital rim distances (4.51 vs 5.71 mm, <em>p</em> = 0.022) but significantly greater distances to the inferior zygomatic border (8.21 vs 7.20 mm, <em>p</em> = 0.015). In the external dataset, Zygoplanner demonstrated significantly larger inter-implant spacing (3.01 vs 1.18 mm, <em>p</em> < 0.001). Despite these differences, ZAGA classifications remained consistent between both groups. Subjective evaluations by experienced surgeons yielded high scores for stability (4.63/5), feasibility (4.51/5), and safety (4.25/5). In the blinded Turing test, Zygoplanner-generated plans were identified as human expert in 65.2 % of cases, significantly exceeds the 50 % random guessing threshold (<em>p</em> = 0.0075).</div></div><div><h3>Conclusion</h3><div>Zygoplanner automatically generates clinically acceptable quad ZI plans with improved 3D-BIC, which effectively reduces the planning complexity and facilitates better preoperative ZI planning.</div></div><div><h3>Clinical Significance</h3><div>Zygoplanner shows strong potential to automate and standardize quad zygomatic implant planning, thereby improving surgical predictability and safety while simplifying the planning workflow. Its automated workflow supports more consistent outcomes and may broaden access to advanced zygomatic implant rehabilitation for patients with edentulous maxillae.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106532"},"PeriodicalIF":5.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146113381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A pilot study on professional cleansing protocols for PMMA resins produced by CAD/CAM and 3D printing technologies: Effects on surface roughness and color stability 由CAD/CAM和3D打印技术生产的PMMA树脂的专业清洗方案的试点研究：对表面粗糙度和颜色稳定性的影响。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-01-31 DOI: 10.1016/j.jdent.2026.106535

Martina Bonvicini , Davide Silvestri , Antonio Arena , Francesca Zicari , Adolfo Di Fiore , Luca Bortolotti , Luca Lusvarghi , Carlo Monaco

Objectives

This in vitro pilot study evaluated the effects of two professional cleansing protocols on surface roughness and color stability of various resins for complete dentures.

Methods

50 resin specimens were prepared and divided into five groups (n = 10): Probase Hot (PH, Ivoclar AG), IvoBase CAD (IBC, Ivoclar AG), Ivotion Dent (ID, Ivoclar AG), Dima Print Denture Base (DPDB, Kulzer), and Dima Print Denture Teeth (DPDT, Kulzer). After a 7-day immersion in coffee solution, two cleansing protocols were applied: a chemical one using an alkaline solution, and a combined mechanical+chemical one involving an acid-based cleaning agent with a rotating needle device followed by the same chemical protocol. Surface roughness was measured before and after cleaning using a structured light profilometer (Confovis) connected to a microscope (Eclipse LV150N, Nikon). Color stability was assessed with a colorimeter (Easy_Color, SmartVision). One specimen per group underwent SEM analysis at baseline and after both protocols. The data analysis was performed by using Kruskal-Wallis test and post-hoc Dunn test for comparison.

Results

Surface roughness was not significantly affected by either protocol (p>0.05). All ΔE values were below the perceptibility threshold (ΔE<1.2), except for ID after both the chemical (ΔE = 2.28) and the mechanical+chemical protocol (ΔE = 2.39) and DPDB after both the chemical (ΔE = 2.06) and the mechanical+chemical protocol (ΔE = 2.33).

Conclusions

Surface roughness and color stability of PMMA resins were not affected by the tested cleansing protocols, so they could be used by clinician during the periodically control visit.

Clinical Significance

The proposed cleansing protocols help preserve the long-term aesthetic and functional integrity of dentures, enhancing patient satisfaction and oral health.

目的：评价两种专业清洗方案对不同树脂全口义齿表面粗糙度和颜色稳定性的影响。方法：制备50个树脂标本，分为Probase Hot （PH, Ivoclar AG）、IvoBase CAD （IBC, Ivoclar AG）、ivtion Dent （ID, Ivoclar AG）、Dima Print义齿基托（DPDB, Kulzer）和Dima Print义齿（DPDT, Kulzer） 5组（n=10）。在咖啡溶液中浸泡7天后，采用了两种清洁方案：一种是使用碱性溶液的化学清洁方案，另一种是机械+化学组合清洁方案，使用酸基清洗剂和旋转针装置，遵循相同的化学方案。使用连接显微镜（Eclipse LV150N, Nikon）的结构光轮廓仪（Confovis）测量清洁前后的表面粗糙度。用色度计（Easy_Color, SmartVision）评估颜色稳定性。在基线和两种方案后，每组各有一个标本进行扫描电镜分析。数据分析采用Kruskal-Wallis检验和post-hoc Dunn检验比较。结果：两种方案对表面粗糙度无显著影响（p < 0.05）。所有ΔE值都低于感知阈值(ΔEConclusions: PMMA树脂的表面粗糙度和颜色稳定性不受测试清洗方案的影响，因此临床医生可以在定期控制访问期间使用它们。临床意义：提出的清洁方案有助于保持义齿的长期美观和功能完整性，提高患者满意度和口腔健康。

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引用次数: 0

3D-printed resins intended for long-term restoration vs. conventionally used materials: A systematic review and network meta-analysis of in vitro studies 用于长期修复的3d打印树脂与传统使用的材料：体外研究的系统回顾和网络荟萃分析。

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry

Pub Date : 2026-01-31 DOI: 10.1016/j.jdent.2026.106531

Eddy Jhonny Alvarez Lalvay , Fabíola Galbiatti de Carvalho , Antoni Raupp da Silva , Francisco Amaro Cruz Morganti , Fabrício Mezzomo Collares , Eliseu Aldrighi Münchow

Objectives

This systematic review with network meta-analysis (NMA) evaluated whether three-dimensional (3D) printed resin-based composites (RBCs) intended for long-term dental restorations perform similarly or superiorly to conventional restorative materials.

Data sources

The review followed the PRISMA extension for NMA. Six electronic databases were searched up to November 2025.

Study selection

In vitro studies assessing at least one commercially available 3D-printed RBC for long-term dental restorations and at least one conventional restorative material were eligible. Methodological quality was assessed using the RoBDEMAT tool, and data were synthesized using Bayesian NMA.

Results

From 2299 records, 50 studies met the inclusion criteria, of which 40 were included in the meta-analyses. Across mechanical, physical, reproducibility, and optical outcomes, 3D-printed RBCs generally performed similarly to or worse than most conventional materials. However, they demonstrated superior marginal and internal fit compared with glass ceramics, polymer-infiltrated ceramic networks, and polymeric restoratives, except when compared with direct RBCs, indicating enhanced dimensional accuracy.

Conclusions

Although 3D printing achieved superior trueness and internal/marginal fit relative to most conventional restorative materials, the inferior mechanical performance, suboptimal microstructural characteristics, and limited optical stability of 3D-printed resins underscore the need for improvements in material formulation, post-curing strategies, and finishing and polishing protocols.

Clinical significance

At present, 3D-printed resins for long-term single-unit restorations do not yet match the overall performance of established conventional restorative systems.

目的：本系统综述采用网络荟萃分析（NMA）评估用于长期牙科修复的三维（3D）打印树脂基复合材料（红细胞）是否与传统修复材料具有相似或优越的性能。数据来源：本综述遵循PRISMA对NMA的扩展。截至2025年11月，检索了六个电子数据库。研究选择：评估至少一种商用3d打印红细胞用于长期牙科修复和至少一种传统修复材料的体外研究符合条件。使用RoBDEMAT工具评估方法学质量，并使用贝叶斯NMA对数据进行综合。结果：在2299项记录中，有50项研究符合纳入标准，其中40项被纳入meta分析。在机械、物理、可重复性和光学结果方面，3d打印红细胞的性能通常与大多数传统材料相似或更差。然而，与玻璃陶瓷、聚合物浸润陶瓷网络和聚合物修复剂相比，它们表现出更好的边缘和内部配合，除了与直接红细胞相比，这表明尺寸精度更高。结论：尽管与大多数传统修复材料相比，3D打印获得了更好的真性和内部/边缘贴合，但3D打印树脂的机械性能较差，微观结构特征不佳，光学稳定性有限，因此需要改进材料配方，后固化策略以及精加工和抛光方案。临床意义：目前，用于长期单单元修复体的3d打印树脂的整体性能还不能与已建立的传统修复体系统相匹配。

{"title":"3D-printed resins intended for long-term restoration vs. conventionally used materials: A systematic review and network meta-analysis of in vitro studies","authors":"Eddy Jhonny Alvarez Lalvay , Fabíola Galbiatti de Carvalho , Antoni Raupp da Silva , Francisco Amaro Cruz Morganti , Fabrício Mezzomo Collares , Eliseu Aldrighi Münchow","doi":"10.1016/j.jdent.2026.106531","DOIUrl":"10.1016/j.jdent.2026.106531","url":null,"abstract":"<div><h3>Objectives</h3><div>This systematic review with network meta-analysis (NMA) evaluated whether three-dimensional (3D) printed resin-based composites (RBCs) intended for long-term dental restorations perform similarly or superiorly to conventional restorative materials.</div></div><div><h3>Data sources</h3><div>The review followed the PRISMA extension for NMA. Six electronic databases were searched up to November 2025.</div></div><div><h3>Study selection</h3><div><em>In vitro</em> studies assessing at least one commercially available 3D-printed RBC for long-term dental restorations and at least one conventional restorative material were eligible. Methodological quality was assessed using the RoBDEMAT tool, and data were synthesized using Bayesian NMA.</div></div><div><h3>Results</h3><div>From 2299 records, 50 studies met the inclusion criteria, of which 40 were included in the meta-analyses. Across mechanical, physical, reproducibility, and optical outcomes, 3D-printed RBCs generally performed similarly to or worse than most conventional materials. However, they demonstrated superior marginal and internal fit compared with glass ceramics, polymer-infiltrated ceramic networks, and polymeric restoratives, except when compared with direct RBCs, indicating enhanced dimensional accuracy.</div></div><div><h3>Conclusions</h3><div>Although 3D printing achieved superior trueness and internal/marginal fit relative to most conventional restorative materials, the inferior mechanical performance, suboptimal microstructural characteristics, and limited optical stability of 3D-printed resins underscore the need for improvements in material formulation, post-curing strategies, and finishing and polishing protocols.</div></div><div><h3>Clinical significance</h3><div>At present, 3D-printed resins for long-term single-unit restorations do not yet match the overall performance of established conventional restorative systems.</div></div>","PeriodicalId":15585,"journal":{"name":"Journal of dentistry","volume":"167 ","pages":"Article 106531"},"PeriodicalIF":5.5,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146105614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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