Brazilian Dental Science最新文献_第5页

UV-C light as an alternative for disinfecting orthodontic pliers UV-C光作为消毒正畸钳的替代品

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3738

Leidiani Rossi Lucas, R. S. Navarro, Andréia de Oliveira, S. Suzuki, A. Garcez

引用次数: 0

Clinical study of different composite resin systems in Class I cavities (an 18-month randomized clinical trial) 不同复合树脂系统在I类牙槽中的临床研究(18个月随机临床试验)

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3737

Hend Ali Ibrahim, A. Abdalla, H. El-Sayed

引用次数: 0

Estrogen deficiency influences TNF-± and IL-1² gene expression in the odontogenic region of dental hypofunctional condition 雌激素缺乏对牙功能障碍牙源区TNF-±和IL-1²基因表达的影响

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3790

Igor Domingos dos Anjos, Vinícius Otávio Nogueira, Martinelle Ferreira da Rocha Taranto, L. A. Ramazzotto, P. Nelson-Filho, E. Küchler, Maria Angélica Hueb Menezes-Oliveira, C. Lepri, F. Baratto-Filho, I. Madalena

引用次数: 0

Effect of laboratory and chairside polishing methods on the surface topography of occlusal splint materials manufactured using conventional, subtractive and additive digital technologies 实验室和椅边抛光方法对使用传统、减法和加法数字技术制造的咬合夹板材料表面形貌的影响

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3873

H. Bilir, Suzan Eda Eyyupoglu, Enes Karaman, M. Özcan, N. Lukic

引用次数: 0

Peri-implant bone level assessment of early loaded dental implants submitted to different prosthetic protocols: a case report 提交不同修复方案的早期加载牙种植体的种植体周围骨水平评估:一个病例报告

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3569

Rodrigo Hideki Yoshiyasu, C. A. Cartelli, Camila Pereira Vianna, Waleska Caldas, S. Bernardes, L. Trojan, Rubens Moreno de Freitas

引用次数: 1

Magnetic resonance imaging texture analysis of the temporomandibular joint for changes in the articular disc in individuals with migraine headache 偏头痛患者颞下颌关节关节盘改变的磁共振成像结构分析

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3649

K. Fardim, Thais Mara Aparecida Monfredini Ribeiro, E. Araújo, C. M. Ogawa, A. Costa, S. Lopes

引用次数: 0

The influence of the retention feature in artificial teeth on its attachment to the thermoplastic resin denture base 人工牙固位特性对热塑性树脂义齿基托附着的影响

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3770

Paulo Roberto Vieira MARTINS, Marcio Katsuyoshi MUKAI, Bruno COSTA, Carolina Mayumi IEGAMI, Roberto Chaib STEGUN

{"title":"The influence of the retention feature in artificial teeth on its attachment to the thermoplastic resin denture base","authors":"Paulo Roberto Vieira MARTINS, Marcio Katsuyoshi MUKAI, Bruno COSTA, Carolina Mayumi IEGAMI, Roberto Chaib STEGUN","doi":"10.4322/bds.2023.e3770","DOIUrl":"https://doi.org/10.4322/bds.2023.e3770","url":null,"abstract":"Objective: Teeth play a crucial role in masticatory efficiency and esthetic harmony making rehabilitation of partially edentulous patients a challenge because of the limitations of conventional removable partial dentures. As a therapeutic alternative, thermoplastic polymers are used in current dental practice either for practical processing purposes or aesthetics. However, it is recognized that the bond between acrylic resin artificial teeth and thermoplastic polymers has no chemical interaction, and depends on retentive features added to the teeth. This study analyzed the efficacy of two retentive forms of features through compressive strength test and as a secondary outcome, fracture and displacement resistance test. Material and Methods: Three groups of samples each with 14 sets of acrylic teeth were compared when two retentive features, single hole and groove retention, and a control group with teeth without any specific form. The experimental unit consisted of six maxillary anterior teeth, positioned in a linear pattern into a polypropylene block, where each tooth was submitted to a static load until its removal, on a universal testing machine. Results: Those specimens with a groove retention presented larger resistance to displacement when compared to the other groups (p <0.05). This was emphasized by the fracture of the tooth tested, with part of the cervical portion remaining embed in the base, and not its displacement as with (or without) the retentive feature. Conclusion: In this study, the type of retention influenced significantly to a better retention considering teeth and thermoplastic polymer base. The data in this study indicates that a groove placed on the artificial tooth offers significantly better retention efficacy to the point where the displacement was only possible after its fracture. KEYWORDS Artificial teeth; Acrylic resins; Denture base; Polypropylene; Retention.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135555973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate 基材、水泥和老化对二硅酸锂双轴抗折强度的影响

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3923

Leonardo Custódio de LIMA, Jean Soares MIRANDA, Ronaldo Luis Almeida de CARVALHO, Aline Serrado de Pinho BARCELLOS, Marina AMARAL, Estevão Tomomitsu KIMPARA

{"title":"Influence of substrate, cement and aging on the biaxial flexural strength of lithium disilicate","authors":"Leonardo Custódio de LIMA, Jean Soares MIRANDA, Ronaldo Luis Almeida de CARVALHO, Aline Serrado de Pinho BARCELLOS, Marina AMARAL, Estevão Tomomitsu KIMPARA","doi":"10.4322/bds.2023.e3923","DOIUrl":"https://doi.org/10.4322/bds.2023.e3923","url":null,"abstract":"Objective: To evaluate the biaxial flexural strength (BFS) of lithium disilicate (L), cemented on different substrates (epoxy resin - E and metal - M) with dual-cure resin cement (Rc) and zinc phosphate cement (Zc), not aged, thermally aged (TC) or thermo-mechanical aged (TC/MC). Material and Methods: Disks of L, E, and M were fabricated, and the cementation was performed according to the following groups: ERc (L+E+Rc); MRc (L+M+Rc); MZc (L+M+Zc); EZc (L+E+Zc). Ten samples from each described group were tested in BFS, ten more samples were subjected to TC (1×104 cycles between 5 ºC and 55 ºC water), and the last 10 samples were subjected to TC/MC (MC: 1.2×106 cycles, 50 N, 3.8 Hz). The BFS test was performed and scanning electron microscopy (SEM) was performed to evaluate the failure mode. The effect of the cementation strategy (cement/substrate) was compared in each aging method and the effect of the aging method was evaluated for each cementation strategy by one-way ANOVA and Tukey post-hoc test (a=0.05). Results: The strength values were highest to M (237.8 ~ 463.9 MPa), in comparison to the E (41.03 ~ 66.76 MPa), despite aging and luting agent. Flexural strength data decreased after TC and TC/MC in groups cemented with Zc, but was stable when cemented with Rc. SEM analysis indicated that failure origins were located at the tensile surface of the L. Conclusion: Lithium disilicate discs cemented to the metallic substrate presented the highest biaxial flexural strength. The cementation with dual-cure resin cement did not decrease BFS after aging. KEYWORDS Aging; Cementation; Ceramics; Flexural strength; Lithium disilicate.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135784777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Unlocking the secrets of saliva: the promising potential of salivary biomarkers for evaluating crack use 解开唾液的秘密:唾液生物标志物评估可卡因使用的潜力

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3892

Sandra Silva MARQUES, Taís Maria Cardoso de Oliveira, Gabriela Ribeiro ZUCCO, Fernando SABBAG, Herculano da Silva MARTINHO, Janete Dias ALMEIDA, Marcelo Ribeiro de ARAÚJO

引用次数: 0

Mechanical behavior of implant-supported full-arch prostheses in different locations in the maxilla: 3D-FEA and strain gauge analysis 上颌骨不同位置种植体全弓修复体的力学行为:3D-FEA和应变仪分析

Brazilian Dental Science Pub Date : 2023-01-01 DOI: 10.4322/bds.2023.e3771

Mateus Favero Barra Grande, G. Lopes, M. Teixeira, A. Pelegrine, J. Matos, R. S. Nishioka

{"title":"Mechanical behavior of implant-supported full-arch prostheses in different\u0000 locations in the maxilla: 3D-FEA and strain gauge analysis","authors":"Mateus Favero Barra Grande, G. Lopes, M. Teixeira, A. Pelegrine, J. Matos, R. S. Nishioka","doi":"10.4322/bds.2023.e3771","DOIUrl":"https://doi.org/10.4322/bds.2023.e3771","url":null,"abstract":"The maxillary bone restriction can limit the implants position to support a full-arch prosthesis. Objective: Therefore, this study evaluated the biomechanical behavior of a full-arch prosthesis supported by six implants in different configurations: group A (implants inserted in the region of canines, first premolars and second molars), group B (implants inserted in the region of first premolar, first molar and second molar) and group C (implants in second premolar, first premolar and second molar). Material and Methods: The models were analyzed by the finite element method validated by strain gauge. Three types of loads were applied: in the central incisors, first premolars and second molars, obtaining results of von-Mises stress peaks and microstrain. All registered results reported higher stress concentration in the prosthesis of all groups, with group C presenting higher values in all structures when compared to A and B groups. The highest mean microstrain was also observed in group C (288.8 ± 225.2 μ ε/ μ ε ), however, there was no statistically significant difference between the evaluated groups. In both groups, regardless of the magnitude and direction of the load, the maximum von-Mises stresses recorded for implants and prosthesis displacements were lower in group A. Conclusion: It was concluded that an equidistant distribution of implants favors biomechanical behavior of full-arch prostheses supported by implants; and the placement of posterior implants seems to be a viable alternative to rehabilitate totally edentulous individuals.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":"186 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77912182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2