Journal of oral science最新文献_第3页

Flexural strength of repaired denture base materials manufactured for the CAD-CAM technique. 采用 CAD-CAM 技术制造的修复义齿基托材料的抗弯强度。

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-04-16 Epub Date: 2024-03-15 DOI: 10.2334/josnusd.23-0275

Şebnem Özatik, Canan Bural Alan

{"title":"Flexural strength of repaired denture base materials manufactured for the CAD-CAM technique.","authors":"Şebnem Özatik, Canan Bural Alan","doi":"10.2334/josnusd.23-0275","DOIUrl":"10.2334/josnusd.23-0275","url":null,"abstract":"Purpose: To evaluate the flexural properties of repaired poly(methylmethacrylate) (PMMA) denture base materials for computer-aided design/computer-aided manufacturing (CAD-CAM) and to compare them with heat-activated polymerized PMMA.Methods: A total of 288 specimens (65 × 10 × 2.5 mm) were prepared using both CAD-CAM and conventional blocks and repaired using autopolymerizing and visible-light polymerizing (VLC) materials. Microwave energy, water storage and hydroflask polymerization were applied as additional post-polymerization cycles after the repair process. The flexural strength (FS) of the specimens was evaluated using the three-point bending test. Data were evaluated statistically using 2-way ANOVA followed by Bonferroni's correction to determine the significance of differences between the groups (P ≤ 0.05).Results: The FS of the denture base materials for CAD-CAM was significantly higher than that for the heat-activated group (P ≤ 0.05). The FS was significantly highest when microwave energy was used for the post-polymerization cycle. The FS values for all groups repaired with VLC resin were significantly lower than for the autopolymerization group (P ≤ 0.05).Conclusion: The flexural properties of denture base materials for CAD-CAM repaired using autopolymerizing acrylic resins can recover by 50-70%. Additional post-polymerization cycles for autopolymerizing repair resin can be suggested to improve the clinical service properties of repaired dentures.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"120-124"},"PeriodicalIF":1.9,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140143693","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 and physical properties of calcium hydroxide-based pulp-capping materials and their modifications. 基于氢氧化钙的纸浆盖材料及其改性的生物和物理特性。

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-04-16 Epub Date: 2024-02-08 DOI: 10.2334/josnusd.23-0288

Dilek Akin, Cigdem Atalayin Ozkaya, Guliz Armagan, Dervis Birim, Mustafa Ates, Huseyin Tezel

{"title":"Biological and physical properties of calcium hydroxide-based pulp-capping materials and their modifications.","authors":"Dilek Akin, Cigdem Atalayin Ozkaya, Guliz Armagan, Dervis Birim, Mustafa Ates, Huseyin Tezel","doi":"10.2334/josnusd.23-0288","DOIUrl":"10.2334/josnusd.23-0288","url":null,"abstract":"Purpose: To evaluate the biological and physical properties of calcium hydroxide-containing pulp-capping materials and their modifications with different solutions and antioxidant Resveratrol (RES) addition.Methods: Calcium hydroxide+distilled-water:C, calcium hydroxide+saline:S, calcium hydroxide+synthetic tissue fluid:STF, Dycal:D, calcium hydroxide+distilled-water+RES:C+RES, calcium hydroxide+saline+RES:S+RES, calcium hydroxide+synthetic tissue fluid+RES:STF+RES, Dycal+RES:D+RES were tested. Cytotoxicity was determined by WST-1. Antibacterial-activity was evaluated by agar-diffusion. The water-absorption and solubility were examined for ISO-6876 and ISO-3107. The color-change was evaluated by spectrophotometer. Radiopacity was evaluated for ISO-6876 and ISO-9917. The normal distribution and homogeneity were determined and comparisons were made with appropriate analysis and post hoc tests (P < 0.05).Results: The highest cell-viability was determined in the C+RES and the lowest was in D and D+RES after 24 h (P < 0.0001). RES-addition increased cell-viability and the highest rate was detected in C+RES, S+RES and STF+RES after 48 h (P < 0.0001). A limited inhibition-zone against Streptococcus mutans was detected in D and D+RES. RES-addition did not change the water-absorption in S and STF or the solubility in S group.Conclusion: RES-addition may be used to increase the biocompatibility of calcium hydroxide without any adverse effect on physical properties. Saline may be the first choice as a mixing solution.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"91-95"},"PeriodicalIF":1.9,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139702759","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

Preoperative oral hygiene treatment reduces bacterial transport and colonization during intubation for orthopedic surgery 术前口腔卫生治疗可减少骨科手术插管期间的细菌迁移和定植

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-04-16 DOI: 10.2334/josnusd.23-0425

Yu Shuai, Xin Wang, Songli Chen, Tixue Huang, Zhao Wang, Yi Zhang

{"title":"Preoperative oral hygiene treatment reduces bacterial transport and colonization during intubation for orthopedic surgery","authors":"Yu Shuai, Xin Wang, Songli Chen, Tixue Huang, Zhao Wang, Yi Zhang","doi":"10.2334/josnusd.23-0425","DOIUrl":"https://doi.org/10.2334/josnusd.23-0425","url":null,"abstract":"Purpose: The process of infection by bacteria and viruses involves invasion, establishment, growth, and parasitization. Poor oral hygiene and dysbiosis are significant risk factors for pneumonia. The aim of this study was to evaluate bacterial transport into the trachea during intubation for orthopedic surgery and the impact of oral hygiene treatment.Methods: The study cohort included 53 patients with fracture who underwent surgical procedures under general anesthesia and were divided into two groups: an oral hygiene treatment (OHT) group (n = 27) and a control group (n = 26). Before intubation, the OHT group underwent preoperative oral hygiene treatment. Microbiological culture was used for detection and counting of bacteria from the oropharynx, trachea, and tip of the endotracheal tube (ETT).Results: Patients in the OHT group had a lower pathogen detection rate and lower degree of bacterial colonization in the oropharynx, trachea, and ETT tip.Conclusion: Preoperative oral hygiene treatment is able to reduce bacterial transport and colonization during orthopedic surgery, thus providing an important adjunct to pre-anesthesia care.\u0000","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"1 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140594178","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

Possible roles of short-chain fatty acids produced by oral bacteria in the development of alveolar osteitis. 口腔细菌产生的短链脂肪酸在牙槽骨炎发展过程中的可能作用。

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-04-16 Epub Date: 2024-02-29 DOI: 10.2334/josnusd.23-0410

Takayuki Asayama, Ayaka Takada, Yoshikazu Mikami, Hirofumi Yamaguchi, Muneaki Tamura, Kunihito Matsumoto, Kiwa Miyake, Yoshiyuki Yonehara, Hiromasa Tsuda

{"title":"Possible roles of short-chain fatty acids produced by oral bacteria in the development of alveolar osteitis.","authors":"Takayuki Asayama, Ayaka Takada, Yoshikazu Mikami, Hirofumi Yamaguchi, Muneaki Tamura, Kunihito Matsumoto, Kiwa Miyake, Yoshiyuki Yonehara, Hiromasa Tsuda","doi":"10.2334/josnusd.23-0410","DOIUrl":"10.2334/josnusd.23-0410","url":null,"abstract":"Purpose: Alveolar osteitis (dry sockets) is a painful condition characterized by a limited immune response. It is typically caused by the removal of blood clots from extracted tooth sockets, which leads to the fermentation of trapped food remnants by oral bacteria in the cavities, producing high concentrations of short-chain fatty acids (SCFAs). This study examined the effects of SCFAs on immunity and bone metabolism.Methods: Mouse macrophage Raw264.7 cells were treated with oral bacteria supernatants or SCFA mixtures, and inducible nitric oxide synthase (iNOS) levels were determined by western blot. The same cells were treated with SCFA mixtures in the presence of receptor activator of nuclear factor-kappa B ligand (RANKL), and osteoclast-like cells were counted. MC3T3-E1 cells were treated with SCFA mixtures and stained with alizarin red S.Results: Raw264.7 cells treated with oral bacterial culture supernatants of Porphyromonas gingivalis and Fusobacterium nucleatum inhibited lipopolysaccharide (LPS)-induced iNOS production, likely due to SCFA content. SCFA mixtures mimicking these supernatants inhibited the number of RANKL-induced tartrate-resistant acid phosphatase (TRAP)-positive cells and MC3T3-E1 cell mineralization.Conclusion: These data suggest that SCFAs produced by P. gingivalis and F. nucleatum may reduce the inflammatory response and mildly induce mineralization of the alveolar walls. These results may contribute to the understanding of alveolar osteitis.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":" ","pages":"102-106"},"PeriodicalIF":1.9,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139990384","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

Association between oral health and nutritional status among older patients requiring long-term care who received home-visit dental care 接受上门牙科护理的需要长期护理的老年患者的口腔健康与营养状况之间的关系

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-03-08 DOI: 10.2334/josnusd.23-0344

Yutaka Fukuyama, Takamasa Komiyama, Takashi Ohi, Yoshinori Hattori

{"title":"Association between oral health and nutritional status among older patients requiring long-term care who received home-visit dental care","authors":"Yutaka Fukuyama, Takamasa Komiyama, Takashi Ohi, Yoshinori Hattori","doi":"10.2334/josnusd.23-0344","DOIUrl":"https://doi.org/10.2334/josnusd.23-0344","url":null,"abstract":"Purpose: This study examined the association between oral health and nutritional status among older patients receiving home-visit dental care.Methods: This study enrolled 110 older patients (age ≥65 years) requiring long-term care who received home-visit dental care. The oral health indicators evaluated included number of teeth, occlusal support, number of functional teeth, tongue pressure, tongue coating index (TCI), and rinsing ability. Nutritional indicators included skeletal muscle mass index (SMI) and the mini-nutritional assessment short-form (MNA-SF). A multivariate modified Poisson regression analysis (adjusted for age, sex, medical history, care level, and housing type) was used to calculate prevalence ratios and 95% confidence intervals (CIs).Results: The prevalence ratio for low SMI was not significantly higher for patients with ≥20 teeth than for those with 1-19 or no teeth. Number of teeth was not significantly associated with MNA-SF score. A high TCI score (2.15, 95% CI: 1.07-4.32) and poor rinsing ability (2.32, 95% CI: 1.25-4.30) were significantly associated with low SMI. High TCI scores were associated with low scores in MNA-SF categories (1.25, 95% CI: 1.01-1.55).Conclusion: TCI and rinsing ability, rather than number of teeth, were associated with nutritional status in older patients requiring long-term care.\u0000","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"35 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140056504","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

Assessment of the color stability of two silicone elastomers for maxillofacial prostheses upon exposure to cold beverages 评估两种用于颌面修复体的硅树脂弹性体在接触冷饮后的颜色稳定性

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-03-05 DOI: 10.2334/josnusd.23-0360

Anshul Chugh, Mariko Hattori, Marwa A. Aboelez, Yuka I. Sumita, Noriyuki Wakabayashi

{"title":"Assessment of the color stability of two silicone elastomers for maxillofacial prostheses upon exposure to cold beverages","authors":"Anshul Chugh, Mariko Hattori, Marwa A. Aboelez, Yuka I. Sumita, Noriyuki Wakabayashi","doi":"10.2334/josnusd.23-0360","DOIUrl":"https://doi.org/10.2334/josnusd.23-0360","url":null,"abstract":"Purpose: This study investigated the color stability of different commercially available silicone materials for facial prostheses upon exposure to everyday beverages. It was hypothesized that the beverages would not alter the color of the silicone under conditions simulating daily exposure.Methods: Sixty specimens were fabricated using two materials – VST-50 and Silfy – and exposed to commercially available cold mineral water, tea, or coffee. Specimen color was evaluated on days 1 and 15. The color was measured with a spectrophotometer based on CIELab system and color differences were calculated as ΔE. Statistical analysis was performed using the Kruskal-Wallis test and Mann-Whitney U test.Results: The mean ΔE values after 15 days of exposure to mineral water, cold green tea, and coffee were 1.016, 3.480, and 3.636 for VST-50 and 0.440, 0.798, and 1.425 for Silfy, respectively. Both materials showed significant differences in color, and VST-50 showed a greater color change than Silfy, especially for coffee.Conclusion: Pigmented silicone elastomers have low color stability, leading to an overall color change in silicone prostheses when exposed to pigmented beverages. Color changes in such prostheses can be mitigated by selecting materials with better color stability to extend their longevity.\u0000","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"55 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140025688","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

Impact of scanning range and image count on the precision of digitally recorded intermaxillary relationships in interocclusal record using intraoral scanner 扫描范围和图像数量对使用口内扫描仪进行咬合间记录的颌间关系数字记录精度的影响

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-02-23 DOI: 10.2334/josnusd.23-0379

Yusuke Koshiishi, Shinpei Tanaka, Yotaro Iwauchi, Kazuyoshi Baba

{"title":"Impact of scanning range and image count on the precision of digitally recorded intermaxillary relationships in interocclusal record using intraoral scanner","authors":"Yusuke Koshiishi, Shinpei Tanaka, Yotaro Iwauchi, Kazuyoshi Baba","doi":"10.2334/josnusd.23-0379","DOIUrl":"https://doi.org/10.2334/josnusd.23-0379","url":null,"abstract":"Purpose: The effect of scan range and the number of scanned images on the precision of in vivo intermaxillary relationship reproduction was evaluated using digital scans acquired with an intraoral scanner.Methods: The study involved 15 participants with normal occlusion. Two different interocclusal recording settings were employed using the intraoral scanner (TRIOS 4): 'MIN,' focusing on the minimal scan range of the first molar region, and 'MAX,' including the scan range from the right first premolar to the right second molar. These settings were combined with three different image counts, resulting in six experimental conditions. Interocclusal recordings were performed four times for each condition. Dimensional discrepancies between datasets were analyzed using three-dimensional morphometric software and compared using two-way analysis of variance.Results: Median dimensional discrepancies (interquartile range; IQR) of 39.2 (30.7-49.4), 42.2 (32.6-49.3), 30.3 (26.8-44.1), 20.1 (16.0-34.8), 21.8 (19.0-25.1), and 26.6 (19.9-34.5) µm were found for MIN/200, MIN/400, MIN/600, MAX/200, MAX/400, and MAX/600, respectively. Significant differences in dimensional discrepancies according to scan range were found. Wilcoxon signed-rank test showed significant differences between MAX and MIN (P < 0.01).Conclusion: Scan range may affect the precision of intermaxillary relationship reproduction. Thus, scanning of the most extensive region practically achievable is recommended.\u0000","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"76 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927996","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

Elemental composition, corrosion resistance and mechanical properties of computer-aided design and computer-aided manufacturing fixed retainers versus conventional fixed retainers 计算机辅助设计和计算机辅助制造固定卡环与传统固定卡环的元素组成、耐腐蚀性和机械性能比较

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-02-23 DOI: 10.2334/josnusd.23-0303

Yasuhiro Namura, Helen Pullisaar, Heidi Vanessa Holm, Morten Syverud, Aida Mulic, Vaska Vandevska-Radunovic

{"title":"Elemental composition, corrosion resistance and mechanical properties of computer-aided design and computer-aided manufacturing fixed retainers versus conventional fixed retainers","authors":"Yasuhiro Namura, Helen Pullisaar, Heidi Vanessa Holm, Morten Syverud, Aida Mulic, Vaska Vandevska-Radunovic","doi":"10.2334/josnusd.23-0303","DOIUrl":"https://doi.org/10.2334/josnusd.23-0303","url":null,"abstract":"Purpose: To investigate the elemental composition, corrosion resistance, and mechanical properties of computer-aided design and computer-aided manufacturing (CAD-CAM) retainers versus conventional fixed retainers (FRs).Methods: Eight different retainer wires were investigated. Energy dispersive X-ray spectroscopy was used to determine the elemental composition. Leakage was analysed according to ISO 10271:2020 guidelines. Hardness was tested using the Vickers method with a load of 0.3 kg. The tensile force and tensile strength were evaluated. Multiple comparisons among wires of hardness, tensile force, and strength were conducted using the Welch t-test, with Bonferroni correction.Results: Nickel was present in all wires. The CAD-CAM-FR wire, which contained more nickel than the other wires, had no measurable leakage. The gold-plated wires had the highest total leakage, but did not exceed the ISO standard limit. The hardness of the stainless-steel twisted wires was the highest and that of the CAD-CAM-FR wire was the lowest. The tensile strength of the CAD-CAM-FR wire was significantly lower than that of the other wires and similar to the other twisted-wire retainers.Conclusion: The CAD-CAM-FR wire is likely to have high corrosion resistance and flexibility due to its low hardness.\u0000","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"2015 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139949567","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

Metal component of dental restorations and fixed prostheses in the oral cavity of 43 cases of adults aged 55 years or older in forensic autopsy. 法医尸检中43例55岁或以上成年人口腔修复体和固定修复体的金属成分。

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-01-16 Epub Date: 2023-10-05 DOI: 10.2334/josnusd.23-0223

Hiroko Oka, Nami Ohbayashi, Mineka Yoshikawa, Narutaka Katsuya, Naoya Kakimoto, Masataka Nagao

引用次数: 0

Use of an intraoral scanner and CAD-CAM for simultaneous restoration with a personalized titanium post-core and a zirconia crown. 使用口内扫描仪和CAD-CAM同时修复个性化钛柱芯和氧化锆牙冠。

IF 1.9 4区医学

Journal of oral science Pub Date : 2024-01-16 Epub Date: 2023-10-22 DOI: 10.2334/josnusd.23-0186

Ling Lin, Yingying Zhuo, Pingping Cai, Xi Chen, Zhiqiang Zheng, Jie Lin

引用次数: 0