Journal of Dental Sciences最新文献

{"title":"Accuracy and fitness of digital light processing-fabricated resin-based permanent crowns after thermal aging","authors":"Pei-Wen Peng ,&nbsp;Wei-Jen Chang ,&nbsp;Jia-Syuan Chou ,&nbsp;Le-Xin Chen ,&nbsp;Cheng-Cho Chuang ,&nbsp;Yi-Jie Lu ,&nbsp;Min-Chieh Hsieh ,&nbsp;Wei-Fang Lee","doi":"10.1016/j.jds.2025.07.007","DOIUrl":"10.1016/j.jds.2025.07.007","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Resin-based materials fabricated using digital light processing (DLP) have received increasing attention for use in permanent dental restorations. This study investigated the accuracy and fit of DLP-fabricated resin-based permanent crowns before and after thermal aging.</div></div><div><h3>Materials and methods</h3><div>A maxillary right first premolar resin tooth was scanned and digitally designed as a reference computer-aided design (CAD) model. Twenty DLP-fabricated permanent resin crowns were produced. Half of the specimens remained unaged, while the others underwent thermal aging through 10,000 cycles between 5 °C and 55 °C. To evaluate crown accuracy, trueness was assessed by comparing virtual models of the fabricated crowns to the design reference model. Precision was evaluated through inter-sample comparisons among the virtual models of the fabricated crowns. Color difference maps were generated for four distinct crown regions, and root mean square (RMS) values were calculated for each. Crown fitness was evaluated using the silicone replica method by measuring silicone thickness at four intaglio areas with a digital microscope. Data differences before and after thermal aging were analyzed using paired <em>t-</em>tests (α = 0.05).</div></div><div><h3>Results</h3><div>Thermal aging significantly increased RMS values for external surface trueness (<em>P &lt;</em> 0.001). Marginal and internal gaps remained within the clinically acceptable discrepancy threshold of 120 μm. Significant differences were observed in the marginal and occlusal gaps in both the coronal and sagittal planes after aging.</div></div><div><h3>Conclusion</h3><div>DLP-fabricated resin permanent crowns demonstrated acceptable trueness and clinically acceptable marginal and internal fitness. However, thermal aging reduced both the accuracy and fitness of these crowns.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2135-2142"},"PeriodicalIF":3.1,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020875","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":"Effects of horizontal dimensional malocclusion on changes in smile measurements in frontal, oblique, and lateral views","authors":"Johnson Hsin-Chung Cheng ,&nbsp;Ming-Han Feng ,&nbsp;Ching-Cheng Hsu ,&nbsp;Ardiansyah Pawinru","doi":"10.1016/j.jds.2025.07.005","DOIUrl":"10.1016/j.jds.2025.07.005","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Horizontal skeletal discrepancies can influence smile esthetics, but their impact on smile dynamics from different photographic perspectives remains underexplored. This study aimed to evaluate how horizontal malocclusion affects soft tissue changes in frontal, oblique, and lateral smile views.</div></div><div><h3>Materials and methods</h3><div>This retrospective study analyzed pre-treatment facial photographs of 200 patients. Subjects were divided into subgroups based on ANB angle and overjet values. Smile characteristics were measured from frontal, oblique, and lateral views at rest and during smiling. Variables were expressed as ratios relative to subnasale-menton distance. Statistical comparisons were made using ANOVA, Scheffé post hoc tests, and multiple regression analysis.</div></div><div><h3>Results</h3><div>Significant differences in smile measurements were more prominent in the oblique and lateral views than in the frontal view. Among ANB groups, greater discrepancies were noted in lower facial landmarks such as menton and pogonion. Oblique views were most sensitive in detecting differences in smile change, particularly among subjects with Class III malocclusion.</div></div><div><h3>Conclusion</h3><div>Horizontal dimensional malocclusion significantly affects soft tissue smile dynamics, particularly in the oblique view. Multiview smile analysis enhances diagnostic accuracy and should be considered in orthodontic assessment and treatment planning.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2143-2153"},"PeriodicalIF":3.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020780","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":"Surgical management of maxillary incisor with palatal radicular groove and endodontic-periodontal lesion","authors":"Le Lu,&nbsp;Ya Shen,&nbsp;He Liu","doi":"10.1016/j.jds.2025.07.013","DOIUrl":"10.1016/j.jds.2025.07.013","url":null,"abstract":"","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2527-2529"},"PeriodicalIF":3.1,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018292","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":"The mesial–mesial/distal–distal (MM-DD) occlusal adjustment technique: A 2–21.5-year retrospective study on preventing open contacts in posterior implant restorations","authors":"Chiun-Lin Steven Liu ,&nbsp;Shih-Cheng Wen ,&nbsp;Ching-Jung Chang Chien ,&nbsp;Je-Kang Du","doi":"10.1016/j.jds.2025.06.026","DOIUrl":"10.1016/j.jds.2025.06.026","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Open contacts adjacent to posterior dental implants are a common clinical complication, often resulting in food impaction, discomfort, and periodontal deterioration. This study aimed to evaluate the long-term clinical effectiveness of the mesial–mesial/distal–distal (MM-DD) occlusal adjustment technique in preventing open contacts adjacent to posterior implant restorations.</div></div><div><h3>Materials and methods</h3><div>This retrospective study analyzed 124 single-tooth posterior implants in 100 patients over a 2–21.5-year follow-up period. The MM-DD technique involved selectively modifying occlusal contacts on the mesial occlusal surface of the mesial adjacent tooth and the distal occlusal surface of the distal adjacent tooth to influence mesial tooth movement and maintain proximal contact with implant restorations. Clinical and radiographic data were assessed for contact integrity, food impaction, discomfort, bone levels, and other outcomes. A control group with conventional occlusal adjustment was included for comparison.</div></div><div><h3>Results</h3><div>The MM-DD group demonstrated a significantly lower incidence of open contacts (2.7 %) compared to the control group (46.7 %, <em>P</em> &lt;0.001). Patients treated with the MM-DD technique reported reduced food impaction and lower discomfort scores, with less proximal bone loss around adjacent teeth. Kaplan–Meier analysis showed high rates of long-term contact stability in the MM-DD group, with 96.2 % of contacts remaining intact at 15 years.</div></div><div><h3>Conclusion</h3><div>With its straightforward application, sound biological foundation, and minimal need for specialized equipment, the MM-DD technique presents a practical and effective solution for preserving proximal contact in posterior implants and is well-suited for widespread adoption in daily dental practice.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2163-2175"},"PeriodicalIF":3.1,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020783","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":"Performance of ChatGPT-4, Gemini, and DeepSeek-V3 on answering the multiple choice questions from Taiwan national dental technician licensing examinations and their self-learning abilities over a three-week period","authors":"Ching-Yi Huang ,&nbsp;Yi-Pang Lee ,&nbsp;Andy Sun ,&nbsp;Chun-Pin Chiang","doi":"10.1016/j.jds.2025.07.011","DOIUrl":"10.1016/j.jds.2025.07.011","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Large language models (LLMs) can help the students to learn specific dental subjects and thus can be used as educational support tools for dental students. This study evaluated whether LLMs could correctly answer the multiple-choice questions (MCQs) selected from the 2023 Taiwan national dental technician licensing examination (TNDTLE) and whether the LLMs had the self-learning ability to improve their performance on correctly answering the exam questions over a three-week period.</div></div><div><h3>Materials and methods</h3><div>Three different LLMs, ChatGPT-4, Gemini, and DeepSeek-V3, were used to answer the 194 text-based MCQs selected from the 2023 TNDTLE and the initial accuracy rates (ARs) were recorded. The same process was performed one, two, and three weeks later and the subsequent ARs were also recorded. The initial and the subsequent overall ARs were compared to assess whether the three LLMs had the self-learning ability over time.</div></div><div><h3>Results</h3><div>The initial overall ARs for ChatGPT-4, Gemini, and DeepSeek-V3 were 52.1 %, 57.2 %, and 69.6 %, respectively, indicating that DeepSeek-V3 outperforms ChatGPT-4 and Gemini. However, Gemini showed significant improvement in performance one week and three weeks later, but the ChatGPT-4 and DeepSeek-V3 showed no significant improvement in performance over time. Among the 9 different subjects of dental technology, Gemini showed notable progress in several subjects, ChatGPT-4 showed limited improvement, and DeepSeek-V3 remained stable overall.</div></div><div><h3>Conclusion</h3><div>Without external prompts, Gemini demonstrates self-learning potential. DeepSeek-V3 shows stable performance but limited learning ability, while ChatGPT-4 exhibits minimal learning. For the improvement in self-learning ability over time, Gemini outperforms ChatGPT-4 and DeepSeek-V3.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2154-2162"},"PeriodicalIF":3.1,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020782","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":"Impact of language and question types on ChatGPT-4o's performance in answering oral pathology questions from Taiwan National Dental Licensing Examinations","authors":"Yu-Hsueh Wu ,&nbsp;Kai-Yun Tso ,&nbsp;Chun-Pin Chiang","doi":"10.1016/j.jds.2025.07.010","DOIUrl":"10.1016/j.jds.2025.07.010","url":null,"abstract":"<div><h3>Background/purpose</h3><div>ChatGPT has been utilized in medical and dental education, but its performance is potentially influenced by factors like language, question types, and content complexity. This study aimed to assess how English translation and question types affect ChatGPT-4o's accuracy in answering English-translated oral pathology (OP) multiple choice questions (MCQs).</div></div><div><h3>Materials and methods</h3><div>A total of 280 OP MCQs were collected from Taiwan National Dental Licensing Examinations and English-translated as a testing set for ChatGPT-4o. The mean overall accuracy rates (ARs) for English-translated and non-translated MCQs were compared by the dependent <em>t</em>-test. The difference in ARs between English-translated and non-translated OP MCQs within each of three question types (image-based, case-based, and odd-one-out questions) was assessed by chi-square test. The binary logistic regression was used to determine which type of question was more likely to be answered incorrectly.</div></div><div><h3>Results</h3><div>ChatGPT-4o showed significantly higher mean overall AR (93.2 ± 5.7 %) for English-translated MCQs than for non-translated MCQs (88.6 ± 6.5 %, <em>P</em> &lt; 0.001). There were no significant differences in the ARs between English-translated and non-translated MCQs within each question type. The binary logistic regression revealed that, within the English-translated condition, image-based questions were significantly more likely to be answered incorrectly (odds ratio = 9.085, <em>P</em> = 0.001).</div></div><div><h3>Conclusion</h3><div>Translation of exam questions into English significantly improved ChatGPT-4o's overall performance. Error pattern analysis confirmed that image-based questions were more likely to result in incorrect answers, reflecting the model's current limitations in visual reasoning. Nevertheless, ChatGPT-4o still demonstrated its strong potential as an educational support tool.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2176-2180"},"PeriodicalIF":3.1,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020784","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":"Bidirectional association between obesity and chronic periodontitis: Inflammatory pathways and clinical implications","authors":"Tsung-Po Chen ,&nbsp;Hui-Chieh Yu ,&nbsp;Wen-Yuan Lin ,&nbsp;Yu-Chao Chang","doi":"10.1016/j.jds.2025.07.009","DOIUrl":"10.1016/j.jds.2025.07.009","url":null,"abstract":"<div><div>Obesity and chronic periodontitis are the prevalent chronic conditions significantly linked through shared common inflammatory and immune mechanisms. This review aimed to synthesize current knowledge on the association between obesity and chronic periodontitis, exploring biological mechanisms, epidemiological evidence, and clinical relevance. Obesity induces systemic low-grade inflammation marked by elevated pro-inflammatory cytokines, altered immune responses, and disrupted adipokine profiles that may influence periodontal inflammation. Conversely, chronic periodontitis, characterized by oral microbial dysbiosis and local inflammation, contributes to systemic inflammatory burden and potentially exacerbates obesity-related complications. Obesity-associated dietary habits further promote pathogenic oral microbiome shifts as well as aggravate periodontal inflammation. Clinically, obese patients frequently exhibit more severe chronic periodontitis and diminished responsiveness to conventional periodontal therapies, highlighting the need for tailored clinical interventions and integrated healthcare approaches. Public health efforts should make dental care easier to access, support teamwork between health professionals, and offer clear education to help manage both obesity and chronic periodontitis. Although researches have advanced significantly, the exact causal mechanisms still remain unclear. Further studies are needed to improve prevention as well as treatment strategies, ultimately reducing the global burden of obesity and chronic periodontitis.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2021-2025"},"PeriodicalIF":3.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020953","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":"Human umbilical cord mesenchymal stem cells secretome and nanoemulsion propolis combination ameliorate osteoclastogenesis in lipopolysaccharide-induced osteolysis in hyperglycemia rats","authors":"Alexander Patera Nugraha ,&nbsp;Kunhua Yang ,&nbsp;Adya Pramusita ,&nbsp;Nurul Aisyah Rizky Putranti ,&nbsp;Muhammad Luthfi ,&nbsp;Nastiti Faradilla Ramadhani ,&nbsp;Ratri Maya Sitalaksmi ,&nbsp;Putri Cahaya Situmorang ,&nbsp;Muh. Ade Artasasta ,&nbsp;Ananto Ali Alhasyimi ,&nbsp;Wibi Riawan ,&nbsp;Albertus Putera Nugraha ,&nbsp;Khairul Anuar Shariff ,&nbsp;Kotaro Tanimoto ,&nbsp;Guang Hong","doi":"10.1016/j.jds.2025.07.003","DOIUrl":"10.1016/j.jds.2025.07.003","url":null,"abstract":"<div><h3>Background/purpose</h3><div>Human umbilical cord mesenchymal stem cell secretome (HUCMSCS) and nanoemulsion propolis (NEP) from Tetragonula biroi may be beneficial regenerative medicine to reduce LPS-induced osteolysis with hyperglycemia. This study aimed to investigate the HUCMSCS and NEP effect on nuclear factor associated T-cell-1 (NFATc1), sclerostin, receptor activator kappa beta (RANK), its ligand (RANKL), the osteoprotegerin (OPG) expression, tartrate-resistant acid phosphatase (TRAPase), and cathepsin K (Ctsk) serum level in LPS-induced osteolysis in hyperglycemic Wistar rats (<em>Rattus novergicus</em>).</div></div><div><h3>Materials and methods</h3><div>Twenty-eight healthy male Wistar rats, 1–2 months old and 250–300 g body weight, were divided into seven groups, namely K1: control group; K2: 100 μl LPS; K3: hyperglycemia (≥230 mg/dL); K4: 100 μl LPS with hyperglycemia; K5: LPS, hyperglycemia, and 100 μl NEP; K6: LPS, hyperglycemia, and 100 μl HUCMSCS; and K7: LPS, hyperglycemia, and 100 μl HUCMSCS and NEP. <em>Escherichia coli`s</em> LPS was used to induce osteolysis on the calvaria. NEP and HUCMSCS were formulated and collected, then injected subcutaneously on the calvaria. Hyperglycemia-induced streptozotocin 30 mg/kg injection for one week, intraperitoneally. All samples were sacrificed on day 8. Blood samples were collected to examine TRAP and Ctsk levels with enzyme-linked immunosorbent assay. NFATc1, sclerostin, and RANK-RANKL-OPG expression investigated with immunohistochemistry.</div></div><div><h3>Results</h3><div><em>HUCMSCS</em> and NEP administration inhibit TRAP and Ctsk levels, reduce NFATc1, sclerostin, and RANK-RANKL, but enhance OPG expression in LPS-induced osteolysis with hyperglycemia with significant differences between groups (<em>P</em> ≤ 0.05).</div></div><div><h3>Conclusion</h3><div>HUCMSCS and NEP post-administration reduced osteoclastogenesis in LPS-induced osteolysis calvaria with hyperglycemic <em>in rats</em> in the early phase of bone remodelling.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2181-2188"},"PeriodicalIF":3.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020785","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":"Carbon dioxide laser-assisted bone regenerative therapy without membrane use","authors":"Yoichi Taniguchi ,&nbsp;Akira Aoki ,&nbsp;Koji Mizutani ,&nbsp;Taichen Lin ,&nbsp;Takanori Iwata","doi":"10.1016/j.jds.2025.06.018","DOIUrl":"10.1016/j.jds.2025.06.018","url":null,"abstract":"<div><div>Favorable outcomes have been reported with periodontal regeneration therapies using dental lasers for blood clot formation. Herein, we presented the clinical and radiographic outcomes of carbon dioxide laser-assisted bone regenerative therapy (LBRT) in periodontology. A 60-year-old man presented with mobility in teeth 43 and 44. Accordingly, the extraction of tooth 44 and periodontal regeneration using carbon dioxide-LBRT around tooth 43 were planned. After thorough debridement, enamel matrix derivative and carbonated apatite (CA) were applied to the root surface and bone defects, respectively. Thereafter, the filled blood-mixed CA was irradiated using a carbon dioxide laser to accelerate blood clot formation for stabilizing the bone graft. At the 13-month follow-up, significant improvements in clinical parameters were observed, indicating substantial bone regeneration. In this patient, the excellent clinical and radiographic healing demonstrated the efficacy of carbon dioxide-LBRT for periodontal regeneration. Blood clot formation using a carbon dioxide laser may lead to favorable outcomes.</div></div>","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2479-2482"},"PeriodicalIF":3.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020781","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":"Nonsurgical calcium hydroxide endodontic treatment of a maxillary lateral incisor with a periapical radiolucent lesion resulting in complete healing of the periapical lesion","authors":"Feng-Chou Cheng,&nbsp;Julia Yu-Fong Chang,&nbsp;Chun-Pin Chiang","doi":"10.1016/j.jds.2025.06.025","DOIUrl":"10.1016/j.jds.2025.06.025","url":null,"abstract":"","PeriodicalId":15583,"journal":{"name":"Journal of Dental Sciences","volume":"20 4","pages":"Pages 2530-2532"},"PeriodicalIF":3.1,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019325","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}