Journal of oral science最新文献_第5页

Novel method for using a single impression and additive technologies to fabricate a metal post and core and metal coping. 一种利用单压痕和增材技术制造金属柱芯和金属顶盖的新方法。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0418

Luigi G Bernardo Sichi, Rodrigo M Araújo

{"title":"Novel method for using a single impression and additive technologies to fabricate a metal post and core and metal coping.","authors":"Luigi G Bernardo Sichi, Rodrigo M Araújo","doi":"10.2334/josnusd.24-0418","DOIUrl":"https://doi.org/10.2334/josnusd.24-0418","url":null,"abstract":"Purpose: To investigate a novel method that uses a single impression, facilitated by additive technologies, to fabricate a metal post and core and metal coping.Methods: Twenty-four human single-rooted teeth were divided into two groups-one for use with a conventional two-appointment method (CT group) and the other for a novel, one-appointment method (OA group). The CT group required separate impressions and cast models for the metal post and core and coping. In contrast, the OA group used a novel single-impression method to obtain both the metal post and core and metal coping. Silicone replica technique was used to assess marginal and internal adaptation of the copings in each group. Statistical analysis was performed using the Mann-Whitney U test (α = 0.05). Additionally, three-dimensional digital evaluation was used for comparison of teeth and coping internal areas.Results: The mean marginal gap did not significantly differ between the CT group (83.77 ± 51.84 µm) and OA group (77.09 ± 31.65 µm) (P = 0.8835). However, the CT group had significantly larger internal gaps (P < 0.05).Conclusion: The findings suggest that it is feasible to fabricate a metal post and core and metal coping from a single impression.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 3","pages":"127-133"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144649768","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

Quantification of clinical plastic waste in a university dental clinic in Peru. 秘鲁一所大学牙科诊所的临床塑料废物量化。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.25-0059

Nadia M Millan-Moquillaza, Mariajosé Ordoñez-Cavero, Julissa A Dulanto-Vargas, Kilder M Carranza-Samanez

{"title":"Quantification of clinical plastic waste in a university dental clinic in Peru.","authors":"Nadia M Millan-Moquillaza, Mariajosé Ordoñez-Cavero, Julissa A Dulanto-Vargas, Kilder M Carranza-Samanez","doi":"10.2334/josnusd.25-0059","DOIUrl":"https://doi.org/10.2334/josnusd.25-0059","url":null,"abstract":"Purpose: To quantify plastic waste (PW) generated during undergraduate clinical care in a private university dental center in Peru.Methods: This cross-sectional study quantified PW produced during a 19-day period by five clinical sections and one radiology section in relation to type of care (n = 7) and procedure (n = 21) in 40 dental units (DUs). PW was characterized by type, composition, number, and weight. Results were projected by year and analyzed with the Kruskal-Wallis test, with P < 0.05 indicating statistical significance.Results: The projected annual PW was 4,254.9 ± 2,498.1 kg, 22.2 ± 18.5% of which comprised DU protective film. The mean number of pieces and weight of PW per patient was 18.6 ± 15.5 pieces and 126.7 ± 166.2 g; however, the values were higher for pediatric dentistry (25.3 pieces) and periodontics (278.9 g) (P ≤ 0.0002). PW was classified into 53 types, eg, pure composition (65.3%), gloves mainly (21.4%), sterilization packaging (10.6%), and standard dental bibs (9.8%), and by proportion by weight, eg, disposable aprons (31.3%), gloves (21.4%), and dental bibs (11.2%).Conclusion: Pediatric dentistry and periodontics generated the most PW by amount and weight. PW comprised personal protective equipment, sterilization packaging, and dental protective film. These results highlight the need to decrease waste and increase awareness of efforts to reduce the adverse environmental effects of dental practice.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 3","pages":"140-145"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144649769","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

Synergistic effects of reduced graphene oxide on the antibacterial activity of calcium hydroxide-based intracanal medicaments containing different vehicles. 还原氧化石墨烯对含不同载体的氢氧化钙基管内药物抗菌活性的协同作用。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0223

Mi-Ah Kim, Min-Kyeong Kim, Eun-Sook Kang, Kyung-San Min

{"title":"Synergistic effects of reduced graphene oxide on the antibacterial activity of calcium hydroxide-based intracanal medicaments containing different vehicles.","authors":"Mi-Ah Kim, Min-Kyeong Kim, Eun-Sook Kang, Kyung-San Min","doi":"10.2334/josnusd.24-0223","DOIUrl":"10.2334/josnusd.24-0223","url":null,"abstract":"Purpose: This study investigated the synergistic effects of reduced graphene oxide (RGO) on the antibacterial activity of three calcium hydroxide-based intracanal medicaments with different vehicles.Methods: Multispecies biofilms were cultured in a bovine root canal model. Intracanal medicaments containing nonaqueous vehicles, including N-methyl-2-pyrrolidone (NMP; CleaniCal), propylene glycol (PG; UltraCal XS), and polyethylene glycol (PEG; Calcipex II), were placed in the model. The synergistic effects of RGO were evaluated by analyzing colony-forming units, extracellular deoxyribonucleic acid (eDNA) levels, and findings from confocal laser-scanning microscopy (CLSM) and scanning electron microscopy. To evaluate the cytotoxicity of each vehicle, a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was performed. To determine whether RGO altered the physicochemical properties of the medicaments, flowability and pH were measured. A P-value of <0.05 was considered to indicate statistical significance.Results: In the CleaniCal group, bacterial viability, eDNA levels, and extracellular polymeric substrate (EPS) were significantly lower in the presence of RGO. However, only bacterial viability significantly differed in the other groups. PEG resulted in the highest cell viability among the vehicles. Furthermore, there was no significant difference in flowability or pH in relation to the inclusion of RGO.Conclusion: The results suggest that RGO enhances the antibacterial effect of intracanal medicaments containing NMP.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 1","pages":"35-40"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006827","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 relationship between the Cbm and Cnm genes in Streptococcus mutans isolated from arches and brackets of patients and antibiotic resistance profiles. 从患者弓和支架中分离的变形链球菌Cbm和Cnm基因与抗生素耐药谱的关系

IF 1.7 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.25-0026

Hamdullah S Bayraktar, Hakkı Yılmaz, İpek Yılmaz, Feyza Doğan

{"title":"The relationship between the Cbm and Cnm genes in Streptococcus mutans isolated from arches and brackets of patients and antibiotic resistance profiles.","authors":"Hamdullah S Bayraktar, Hakkı Yılmaz, İpek Yılmaz, Feyza Doğan","doi":"10.2334/josnusd.25-0026","DOIUrl":"https://doi.org/10.2334/josnusd.25-0026","url":null,"abstract":"Purpose: Human dental caries is a troublesome disorder of the teeth, and the bacterium mostly responsible is Streptococcus mutans. The Cbm and Cnm genes, which encode the Cbm and Cnm proteins respectively, are two of the virulence factors associated with Streptococcus mutans strains. Oral appliances such as dental arches and brackets accelerate streptococcal colonization and caries formation. The aim of this study was to determine the gene frequency of Cnm and Cbm in Streptococcus mutans strains isolated from oral arches and brackets in orthodontics patients and their relationship to antibiotic resistance.Methods: Four hundred seventy-three orthodontics patients were included in this study and 384 Streptococcus mutans strains were isolated from the arches and brackets of these patients. The strains were identified and verified using a Vitek-2 compact system and their antibiotic susceptibility was determined by the disc diffusion method. The presence of the Cbm and Cnm genes was confirmed by the PCR method.Results: It was found that 2.08% of the strains the Cbm gene and 16.14% the Cnm gene. The rate of co-existence of these two genes was 0.78%.Conclusion: Strains those harbored the Cbm and Cnm genes are more resistant to antibiotics and more likely to be major risk factors for caries in orthodontic patients.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 4","pages":"186-190"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145301562","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

Differences in the effectiveness of stabilization splints between the categories of sleep bruxism. 稳定夹板在睡眠磨牙症类别间有效性的差异。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0233

Yasushi Onoguchi, Kyosuke Oki, Yoshihiro Tsukiyma, Yasunori Ayukawa, Kiyoshi Koyano

{"title":"Differences in the effectiveness of stabilization splints between the categories of sleep bruxism.","authors":"Yasushi Onoguchi, Kyosuke Oki, Yoshihiro Tsukiyma, Yasunori Ayukawa, Kiyoshi Koyano","doi":"10.2334/josnusd.24-0233","DOIUrl":"https://doi.org/10.2334/josnusd.24-0233","url":null,"abstract":"Purpose: The present study investigated the effects of stabilization splints on two categories of sleep bruxism using a portable electromyographic recording system.Methods: Twenty-six individuals confirmed as mild to severe bruxers by nocturnal masseter electromyographic episodes were enrolled in the study. Participants wore a stabilization splint during sleep for 30 nights, and masseter muscle activity was measured at baseline, immediately after, and 1 and 4 weeks after insertion of the splint. Bursts in masseter electromyographic episodes were separated into phasic bursts or tonic bursts, then each burst was analyzed in terms of duration, frequency, and magnitude of bursts.Results: The frequency of phasic bursts significantly decreased immediately after insertion of the splint compared with the baseline. The geometric mean magnitude of tonic bursts decreased when wearing the splint compared with the baseline.Conclusion: These findings suggest that stabilization splints reduce jaw-muscle activity during sleep in patients suffering from sleep bruxism by reducing the frequency of phasic bursts in the short term and reducing the magnitude of tonic bursts over a longer period.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"101-105"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144009577","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

Survey on adhesive performance of acrylic-based stick adhesive. 丙烯酸基胶粘剂粘接性能的研究。

IF 1.7 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.25-0088

Yuki Wakabayashi, Midori Kawamura, Tomohiro Michida, Keigo Nishikawa, Takayoshi Suzuki, Yasuo Ueda

引用次数: 0

Tomographic and 3-dimensional imaging of the larger recurved caniniform teeth on the jawbone of Caprodon schlegelii. 施莱格龙下颌骨大犬齿的层析成像和三维成像。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0414

Bin Honjo, Yosuke Yamazaki, Maki Yuguchi, Keitaro Isokawa

{"title":"Tomographic and 3-dimensional imaging of the larger recurved caniniform teeth on the jawbone of Caprodon schlegelii.","authors":"Bin Honjo, Yosuke Yamazaki, Maki Yuguchi, Keitaro Isokawa","doi":"10.2334/josnusd.24-0414","DOIUrl":"10.2334/josnusd.24-0414","url":null,"abstract":"Purpose: This study aimed to characterize the 3-dimensional morphology of larger recurved caniniform teeth (LrCTs) and their underlying intraosseous structures in Caprodon schlegelii.Methods: Specimens (n = 5) with a total length of approximately 32 cm were fixed and processed for micro-computed tomography and/or stereomicroscopy. Volume data of the LrCT-bearing jaws were examined using volume rendering images.Results: The LrCTs were identified in six locations on the jawbones: anteriorly, a pair of LrCTs in each of the jaw quadrants, and posteriorly, tandemly aligned rows of LrCTs in the dentary bones. In both cases, two adjacent LrCTs were in different stages of tooth life, namely, developmental and functional stages. Large intraosseous chambers contained the tooth germ area or were connected to the pulp of the overlying LrCTs. In the lower jaw, the chambers beneath the anterior and posterior LrCTs were connected to the canal systems, which were distributed in the lower and upper halves of the dentary bone, respectively.Conclusion: The presence of LrCTs in six different locations on the jaws is a distinguishing feature of C. schlegelii, and a balanced replacement between developing and functional LrCTs is likely to ensure the mode and behavior of feeding in this species.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 1","pages":"46-52"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006837","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

Retrospective dental hospital-based study of survival of permanent teeth replanted after avulsion injury. 以牙科医院为基础的回顾性研究：撕脱伤后再植恒牙的存活率。

IF 1.7 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.25-0100

Derya Ceyhan, Zuhal Kırzıoğlu

{"title":"Retrospective dental hospital-based study of survival of permanent teeth replanted after avulsion injury.","authors":"Derya Ceyhan, Zuhal Kırzıoğlu","doi":"10.2334/josnusd.25-0100","DOIUrl":"https://doi.org/10.2334/josnusd.25-0100","url":null,"abstract":"Purpose: This study used descriptive and inferential statistics to evaluate healing complications and survival time of avulsed permanent teeth.Methods: Records of children and adolescents with avulsion injury were identified, and data on age, gender, cause of trauma, number of affected teeth, and status of other teeth and supporting tissues were analyzed. In addition, data on root formation status, duration and medium of extraoral storage, and healing complications of avulsed and replanted permanent teeth were obtained for patients who attended follow-up appointments.Results: During a period of almost 20 years, 187 permanent teeth of 138 patients were avulsed. Avulsion injuries were more frequent in males and at 10-12 years of age. Falls were the main cause of avulsion, and the teeth most frequently affected were the maxillary central incisors. Seventeen of 51 replanted and followed teeth were retained. Retention was shorter for teeth stored in dry medium. Duration of tooth retention was positively correlated with patient age at the time of trauma. The most common healing complications were ankylosis (70.6%) and inflammatory root resorption (54.9%).Conclusion: Outcomes of traumatic injuries are multifactorial, and favorable storage conditions, shorter duration of extraoral storage, and biological response are important for survival of avulsed teeth.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 4","pages":"172-180"},"PeriodicalIF":1.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145301516","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

Novel approach for forensic dental identification using maxillary homologous models. 利用上颌同源模型进行法医鉴定的新方法。

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0332

Isuruni Kuruppuarachchige, Upul Cooray, Toshihiko Suzuki, Moe Kosaka, Yuka Hatano

{"title":"Novel approach for forensic dental identification using maxillary homologous models.","authors":"Isuruni Kuruppuarachchige, Upul Cooray, Toshihiko Suzuki, Moe Kosaka, Yuka Hatano","doi":"10.2334/josnusd.24-0332","DOIUrl":"https://doi.org/10.2334/josnusd.24-0332","url":null,"abstract":"Purpose: As three-dimensional (3D) intraoral scans are becoming popular in modern dentistry, they also offer a new category of antemortem data for forensic identification. This study proposes a novel methodology for individual identification based on 3D homologous models of the maxilla.Methods: Data from 100 maxillary plaster casts (40 monozygotic twin casts, 28 dizygotic twin casts and 32 singleton casts) were used. From the initial sample, 10 casts were randomly chosen and duplicated four times, resulting in 40 duplicates. These were divided into four groups and subjected to the following alterations: molar attrition (n = 10), canine attrition (n = 10), molar and canine attrition (n = 10), and no alteration (n = 10). All the casts were converted to 3D models and then to homologous models using a template with 24 landmarks. The 3D coordinates of each vertex in the homologous model were then calculated and used for statistical comparison of similarity between two given homologous models using the average Hausdorff distance.Results: All four groups achieved accurate matching with their original maxillary casts, with a minimal average Hausdorff distance.Conclusion: This method accurately identified individuals, including monozygotic twins, and exhibited robustness against minor tooth attrition, demonstrating its feasibility as an identification method in actual forensic settings.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"59-64"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144018553","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 sintering temperature on crystal structure, optical and thermal properties, and surface roughness and topography of nanolithium disilicate and zirconia-reinforced nanolithium silicate ceramics. 烧结温度对纳米硅酸锂和氧化锆增强纳米硅酸锂陶瓷晶体结构、光学和热性能、表面粗糙度和形貌的影响

IF 1.9 4区医学

Journal of oral science Pub Date : 2025-01-01 DOI: 10.2334/josnusd.24-0318

Supontep Teerakanok, Chatcharwin Ungurawasaporn, Pitchaporn Kosago, Boonlert Kukiattrakoon

{"title":"Effect of sintering temperature on crystal structure, optical and thermal properties, and surface roughness and topography of nanolithium disilicate and zirconia-reinforced nanolithium silicate ceramics.","authors":"Supontep Teerakanok, Chatcharwin Ungurawasaporn, Pitchaporn Kosago, Boonlert Kukiattrakoon","doi":"10.2334/josnusd.24-0318","DOIUrl":"https://doi.org/10.2334/josnusd.24-0318","url":null,"abstract":"Purpose: This study evaluated the effects of sintering temperature on the crystal structure, optical and thermal properties, and surface roughness and topography of nanolithium disilicate ceramics (NLDS) and zirconia-reinforced nanolithium silicate ceramics (ZNLS).Methods: One hundred and twenty specimens of each ceramics were prepared and divided into 4 groups on the basis of sintering temperature. The specimens were then subjected to X-ray diffraction (XRD), spectrophotometric analysis of optical properties, differential thermal analysis (DTA), thermal gravimetrical analysis (TGA), roughness analysis, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) spectrometry. The data were analyzed using one-way analysis of variance followed by Tukey's test (α = 0.05)Results: XRD confirmed the presence of lithium disilicate, lithium phosphate, lithium metasilicate, and quartz in NLDS and ZNLS specimens. TGA, DTA, and average roughness did not significantly differ between groups (P < 0.05). Among NLDS groups, NLDS4 had ∆E values that significantly differed from those of the other groups (P < 0.05). EDX showed that NLDS2 had the highest Si value (25.3 ± 0.1 wt%) followed by NLDS4 (24.8 ± 0.1 wt%). Among ZNLS groups, ZNLS2-4 had a clinically acceptable ∆E. EDX analysis showed no significant difference for any group.Conclusion: Sintering temperature did not affect the evaluated properties of NLDS. However, sintering ZNLS at different temperatures might affect the tested properties.","PeriodicalId":16646,"journal":{"name":"Journal of oral science","volume":"67 2","pages":"77-82"},"PeriodicalIF":1.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143988969","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