Brazilian oral research最新文献_第7页

Impact of COVID-19 on pediatric dental care in two epicenters: Italy and Brazil. COVID-19 对两个震中地区儿童牙科护理的影响：意大利和巴西。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-08-05 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0068

Camilla Karoline de Carvalho Beckman, Valentina Luppieri, Letícia Martins Pereira, Camila Ribeiro Silva, Paula Midori Castelo, Milena Cadenaro, Regina Maria Puppin Rontani, Aline Rogéria Freire de Castilho

{"title":"Impact of COVID-19 on pediatric dental care in two epicenters: Italy and Brazil.","authors":"Camilla Karoline de Carvalho Beckman, Valentina Luppieri, Letícia Martins Pereira, Camila Ribeiro Silva, Paula Midori Castelo, Milena Cadenaro, Regina Maria Puppin Rontani, Aline Rogéria Freire de Castilho","doi":"10.1590/1807-3107bor-2024.vol38.0068","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0068","url":null,"abstract":"The study aimed to compare the adherence of Brazilian and Italian pediatric dentists to the biosafety measures and operative protocols recommended by the health authorities during COVID-19 pandemic and to classify the participants according to their risk of infection. An online questionnaire with 34 questions about sociodemographic and occupational data, dental practice organization, biological risk management, and clinical operative protocols was sent to Brazilian and Italian pediatric dentists using a convenience sampling strategy. Chi-square test and multivariate analysis (two-step cluster) were performed (α = 5%). Of 641 respondents (377 Brazilians and 264 Italians), most were female (94% and 70%, respectively), aged 20-39 years (63%), with over 10 years of professional experience (58% and 49%, respectively). Based on adherence to recommended biosafety measures, participants were classified as \"safer\" (n = 219) or \"less safe\" (n = 422). Adherence to recommended protocols by the majority of participants resulted in low contagion rates (Brazilians = 5%; Italians = 12.5%). Participants with extensive professional experience in the dental setting exhibited a greater tendency to implement multiple adaptations (three or more) in their practice. Most participants (Brazilians = 92%; Italians = 80.7%) adopted the recommended minimal intervention dentistry approaches, with the use of fissure sealants and the use of non-rotary instruments for caries removal the most frequently techniques used among Brazilians (36%) and Italians (66%), respectively. Two different profiles of pediatric dentists were identified based on the biosafety protocols adopted during the pandemic. In addition, changes were implemented in the dental care provided to children, with focus on the minimal intervention dentistry.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e068"},"PeriodicalIF":1.5,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376669/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141896793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validity and reliability of the Brazilian version of the Illness Perception Questionnaire-Revised for Dental. 巴西版牙科疾病认知问卷（修订版）的有效性和可靠性。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-08-05 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0029

Marjorie Izabella Batista Aguiar, Maria Beatriz Duarte Gavião, Rogério Lacerda Dos Santos, Renata Andréa Salvitti de Sá Rocha, Taís de Souza Barbosa

{"title":"Validity and reliability of the Brazilian version of the Illness Perception Questionnaire-Revised for Dental.","authors":"Marjorie Izabella Batista Aguiar, Maria Beatriz Duarte Gavião, Rogério Lacerda Dos Santos, Renata Andréa Salvitti de Sá Rocha, Taís de Souza Barbosa","doi":"10.1590/1807-3107bor-2024.vol38.0029","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0029","url":null,"abstract":"This study aimed to test the validity and reliability of the Brazilian version of the \"Illness Perception Questionnaire-Revised for Dental\" (IPQ-RD) in parents/guardians of children aged six to 14 years. The sample consisted of 63 parents/guardians of schoolchildren from the municipal school system of Teófilo Otoni, MG. Remote and virtual data collection consisted of self-completion of personal data, socioeconomic questionnaire and the Brazilian short versions of the \"Parental-Caregiver Perceptions Questionnaire\" (16-P-CPQ) and the \"Family Impact Scale\" (4-FIS). The IPQ-RD was applied by telephone interview. Almost half of the sample belonged to socioeconomic classes C1 and C2. Approximately 1/3 classified their child's oral health as \"regular\" or \"poor\", while 11.1% reported \"strong\" or \"very strong\" impact on their child's well-being. The items most frequently cited as having an impact on the four domains of the 16-P-CPQ were: \"bad breath\" (23.8%), \"mouth breathing\" (20.7%), \"feeling anxious or afraid\" (20.7%), and \"paying attention at school\" (10%). In the 4-FIS, 11.1% \"had little time for themselves or the family\". There were higher IPQ-RD scores in the \"disease coherence\" domain for women and lower values of \"emotional dimensions\" for parents/guardians with incomplete education. The mean IPQ-RD score was 126.4 (±15.1), and domain scores were positively correlated. The internal consistency was \"almost perfect\" for the IPQ-RD total score, ranging from \"moderate\" to \"almost perfect\" for the \"child-control\" and \"child-consequences\" domains. The intraclass correlation coefficient ranged from 0.04 (poor) to 0.68 (substantial). The Brazilian Portuguese version of the IPQ-RD proved to be valid and reliable for assessing the cognitive and emotional perception of parents/guardians about childhood dental caries.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e029"},"PeriodicalIF":1.5,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376666/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141896825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Restoration-repair potential of resin-modified glass ionomer cement. 树脂改性玻璃离聚物水泥的修复潜力。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-23 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0076

Carolina Lopes da Silva, Cleber Paradzinski Cavalheiro, Cassiane Gonçalves de Oliveira da Silva, Daniela Prócida Raggio, Luciano Casagrande, Tathiane Larissa Lenzi

{"title":"Restoration-repair potential of resin-modified glass ionomer cement.","authors":"Carolina Lopes da Silva, Cleber Paradzinski Cavalheiro, Cassiane Gonçalves de Oliveira da Silva, Daniela Prócida Raggio, Luciano Casagrande, Tathiane Larissa Lenzi","doi":"10.1590/1807-3107bor-2024.vol38.0076","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0076","url":null,"abstract":"This in vitro study aimed to evaluate the repair bond strength of resin-modified glass ionomer cement using either the same material or a universal adhesive in the etch-and-rinse and self-etch modes plus resin composite. Twenty-four resin-modified glass ionomer cement blocks were stored in distilled water for 14 d and thermocycled. Sandpaper ground specimens were randomly assigned to three experimental groups according to the repair protocol: resin-modified glass ionomer cement (Riva Light Cure, SDI) and universal adhesive (Scotchbond Universal Adhesive, 3M Oral Care) in etch-and-rinse or self-etch modes and nanohybrid resin composite (Z350 XT, 3M Oral Care). After 24 h of water storage, the blocks were sectioned, and bonded sticks were subjected to the microtensile bond strength (μTBS) test. One-way ANOVA and Tukey's test were used to analyze the data. The failure mode was descriptively analyzed. The highest μTBS values were obtained when the resin-modified glass ionomer cement was repaired using the same material (p < 0.01). In addition, the mode of application of the universal adhesive system did not influence the repair bond strength of the resin-modified glass ionomer cement. Adhesive/mixed failures prevailed in all groups. Repair of resin-modified glass ionomers with the same material appears to be the preferred option to improve bond strength.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e076"},"PeriodicalIF":1.5,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376604/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142016431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum. 勘误。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-15 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0025.erratum

引用次数: 0

Erratum. 勘误。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-15 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0020.erratum

引用次数: 0

Spin in dental publications: a scoping review. 牙科出版物中的自旋：范围界定审查。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-12 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0065

Laís Rueda Cruz, Stephanie Fumagalli Braga, Paulo Nadanovsky, Ana Paula Pires Dos Santos

{"title":"Spin in dental publications: a scoping review.","authors":"Laís Rueda Cruz, Stephanie Fumagalli Braga, Paulo Nadanovsky, Ana Paula Pires Dos Santos","doi":"10.1590/1807-3107bor-2024.vol38.0065","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0065","url":null,"abstract":"The aim of this review was to map the practice of spin in scientific publications in the dental field. After registering the review protocol (osf.io/kw5qv/), a search was conducted in MEDLINE via PubMed, CENTRAL, Embase, Scopus, LILACS, ClinicalTrials.gov, and OpenGrey databases in June 2023. Any study that evaluated the presence of spin in dentistry was eligible. Data were independently extracted in duplicate by two reviewers. After removing duplicates, 4888 records were screened and 38 were selected for full-text review. Thirteen studies met the eligibility criteria, all of which detected the presence of spin in the primary studies, with the prevalence of spin ranging from 30% to 86%. The most common types of spin assessed in systematic reviews were failure to mention adverse effects of interventions and to report the number of studies/patients contributing to the meta-analysis of main outcomes. In randomized controlled trials, there was a focus on statistically significant within-group and between-group comparisons for primary or secondary outcomes (in abstract results) and claiming equivalence/noninferiority/similarity for statistically nonsignificant results (in abstract conclusions). The practice of spin is widespread in dental scientific literature among different specialties, journals, and countries. Its impact, however, remains poorly investigated.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e065"},"PeriodicalIF":1.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376646/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141625952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dentin erosive wear is reduced by fluoride varnishes containing nanosized sodium trimetaphosphate in vitro. 含有纳米级三偏磷酸钠的氟化物清漆可在体外减少牙本质侵蚀磨损。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-12 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0056

Isabela Ferreira da Silva, Letícia Cabrera Capalbo, Renan Dal-Fabbro, Mayra Frasson Paiva, Thayse Yumi Hosida, Liliana Carolina Báez-Quintero, Caio Sampaio, Douglas Roberto Monteiro, Alberto Carlos Botazzo Delbem, Juliano Pelim Pessan

{"title":"Dentin erosive wear is reduced by fluoride varnishes containing nanosized sodium trimetaphosphate in vitro.","authors":"Isabela Ferreira da Silva, Letícia Cabrera Capalbo, Renan Dal-Fabbro, Mayra Frasson Paiva, Thayse Yumi Hosida, Liliana Carolina Báez-Quintero, Caio Sampaio, Douglas Roberto Monteiro, Alberto Carlos Botazzo Delbem, Juliano Pelim Pessan","doi":"10.1590/1807-3107bor-2024.vol38.0056","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0056","url":null,"abstract":"This study evaluated the effect of fluoride varnishes containing micrometric or nanosized sodium trimetaphosphate (TMP) on dentin erosive wear in vitro. Bovine root dentin blocks were selected by surface hardness and randomly divided into five experimental groups/varnishes (n = 20/group): placebo, 5% sodium fluoride (NaF); 5% NaF+5% micrometric TMP; 5% NaF+2.5% nanosized TMP; and 5% NaF+5% nanosized TMP. Half of the surface of all blocks received a single application of the assigned varnish, with subsequent immersion in artificial saliva for 6 h. Varnishes were then removed and the blocks were immersed in citric acid (90 s, 4×/day, 5 days). After each erosive cycle, ten blocks of each group were immersed in a placebo dentifrice for 15 s (ERO), while the other ten blocks were subjected to abrasion by brushing (ERO+ABR). Dentin erosive wear was assessed by profilometry. Data were submitted to 2-way ANOVA and to the Holm-Sidak test (p<0.05). Dentin erosive wear was significantly higher for ERO+ABR than for ERO for all varnishes. TMP-containing varnishes promoted superior effects against dentin erosive wear compared with 5% NaF alone; and 5% nanosized TMP led to the lowest wear among all varnishes. In conclusion, the addition of TMP to conventional fluoride varnish (i.e., varnish containing only NaF) enhanced its protective effects against bovine root dentin erosion and erosion+abrasion. Additionally, the use of 5% nanosized TMP led to superior effects in comparison to 5% micrometric TMP, both for erosion and erosion+abrasion in vitro.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e056"},"PeriodicalIF":1.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376609/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141626013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulation of osteoclastogenesis by macrogeometrically designed hydrophilic dual acid-etched titanium surfaces. 宏观几何设计的亲水双酸蚀钛表面对破骨细胞生成的调节作用

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-12 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0064

Rainde Naiara Rezende de Jesus, Christos Tsatsanis, Camilla Christian Gomes Moura, Darceny Zanetta-Barbosa, Andreas Stavropoulos

{"title":"Modulation of osteoclastogenesis by macrogeometrically designed hydrophilic dual acid-etched titanium surfaces.","authors":"Rainde Naiara Rezende de Jesus, Christos Tsatsanis, Camilla Christian Gomes Moura, Darceny Zanetta-Barbosa, Andreas Stavropoulos","doi":"10.1590/1807-3107bor-2024.vol38.0064","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0064","url":null,"abstract":"The aim of this study was to evaluate the influence of implant macrodesign and surface hydrophilicity on osteoclast (OC) differentiation, activation, and survival in vitro. Titanium disks were produced with a sandblasted, dual acid-etched surface, with or without additional chemical modification for increasing hydrophilicity (SAE-HD and SAE, respectively) and different macrodesign comprising trapezoidal (HLX) or triangular threads (TMX). This study evaluated 7 groups in total, 4 of which were experimental: HLX/SAE-HD, HLX-SAE, TMX/SAE-HD, and TMX/SAE; and 3 control groups comprising OC differentiated on polystyrene plates (CCPC): a positive CCPC (+), a negative CCPC (-), and a lipopolysaccharide-stimulated assay positive control group, CCPC-LPS. Murine macrophage RAW264.7 cells were seeded on the disks, differentiated to OC (RAW-OC) by receptor activator of nuclear factor-κB ligand (RANKL) treatment and cultured for 5 days. Osteoclast differentiation and cell viability were respectively assessed by specific enzymatic Tartrate-Resistant Acid Phosphatase (TRAP) activity and MTT assays. Expression levels of various OC-related genes were measured at the mRNA level by quantitative polymerase chain reaction (qPCR). HLX/SAE-HD, TMX/SAE-HD, and HLX/SAE significantly suppressed OC differentiation when compared to CCPC (+). Cell viability was significantly increased in TMX/SAE and reduced in HLX/SAE-HD. In addition, the expression of Interleukin (IL)-6 and Tumour Necrosis Factor (TNF)-α was upregulated in TMX/SAE-HD compared to CCPC (+). Hydrophilic surfaces negatively modulate macrophage/osteoclast viability. Specifically, SAE-HD with double triangular threads increases the cellular pro-inflammatory status, while surface hydrophilicity and macrodesign do not seem to have a distinct impact on osteoclast differentiation, activation, or survival.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e064"},"PeriodicalIF":1.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376645/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141625950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Test of Oral Health Literacy in Adults (TOHLA): development and psychometric evaluation of a new scale. 成人口腔健康知识测试（TOHLA）：新量表的开发和心理测量评估。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-12 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0059

Mohtasham Ghaffari, Sakineh Rakhshanderou, Fábio Luiz Mialhe, Yadollah Mehrabi, Ali Safari-Moradabadi

{"title":"Test of Oral Health Literacy in Adults (TOHLA): development and psychometric evaluation of a new scale.","authors":"Mohtasham Ghaffari, Sakineh Rakhshanderou, Fábio Luiz Mialhe, Yadollah Mehrabi, Ali Safari-Moradabadi","doi":"10.1590/1807-3107bor-2024.vol38.0059","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0059","url":null,"abstract":"This study aimed to develop and rigorously evaluate the Test of Oral Health Literacy in Adults (TOHLA) for the Iranian population, addressing the limitations of existing oral health literacy (OHL) measurement instruments and contributing to the literature on OHL assessment. The development of the TOHLA involved a qualitative approach, which included a comprehensive literature review and semi-structured interviews with a panel of 15 experts from diverse fields and 22 Iranian adults aged 18 to 64 years. The instrument was designed with 48 items categorized into four domains: cognitive skill, communication skill, media skill, and functional skill. Content validity was established through expert input and content validation indices. Construct validity was supported by factor analysis, and concurrent validity was assessed by comparing TOHLA scores with demographic variables. Internal consistency and test-retest reliability analyses were performed to assess the instrument's reliability. The psychometric evaluation of the TOHLA demonstrated strong content validity, construct validity, concurrent validity, internal consistency, and test-retest reliability. The instrument exhibited a high level of internal consistency, with a Cronbach's alpha coefficient of 0.81 for the entire scale. Test-retest reliability was satisfactory, with an intraclass correlation coefficient (ICC) of 0.83. Concurrent validity analysis showed statistically significant associations between OHL scores and demographic variables, supporting the instrument's overall performance. The TOHLA overcomes the weaknesses observed in existing instruments and offers a comprehensive tool with strong psychometric properties to assess the OHL of the Iranian adult population. Researchers, policymakers, and healthcare providers can utilize the TOHLA to address oral health challenges and enhance overall oral health outcomes among Iranian adults.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e059"},"PeriodicalIF":1.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376613/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141625953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of storage conditions on the fracture reliability and physical properties of a dental resin-based composite. 储存条件对牙科树脂基复合材料断裂可靠性和物理性能的影响。

IF 1.5 4区医学

Brazilian oral research Pub Date : 2024-07-12 eCollection Date: 2024-01-01 DOI: 10.1590/1807-3107bor-2024.vol38.0062

Afnan Omar Al-Zain, Evandro Piva, Alice Hammes Pimentel, Camila Gonçalves Duarte, Lisia Lorea Valente, Cristina Pereira Isolan, Eliseu Aldrighi Münchow

{"title":"Impact of storage conditions on the fracture reliability and physical properties of a dental resin-based composite.","authors":"Afnan Omar Al-Zain, Evandro Piva, Alice Hammes Pimentel, Camila Gonçalves Duarte, Lisia Lorea Valente, Cristina Pereira Isolan, Eliseu Aldrighi Münchow","doi":"10.1590/1807-3107bor-2024.vol38.0062","DOIUrl":"10.1590/1807-3107bor-2024.vol38.0062","url":null,"abstract":"This study investigated the impact of 'storage condition' and 'period of storage' on selected physico-mechanical properties and fracture reliability of a resin-based composite (RBC). Specimens, prepared from a nanofilled RBC (Filtek Z350 XT; 3M ESPE), underwent tests for degree of conversion (DC), flexural strength (σ), flexural modulus (E), and hardness. The specimens were initially grouped into dry storage at 37°C or wet storage in distilled water at 37°C. Subsequently, they were further divided into four subgroups based on the period of storage: 6, 24, 72, or 168 hours. Specimens tested immediately after preparation served as control. Data analysis employed two-way ANOVA and Weibull analysis (α = 5%). Compared to the control, an increase in DC was observed only after 72 hours of dry storage; σ showed higher values after both dry and wet storage, regardless of the storage period (except for the group wet-stored for 168 hours); E increased with dry storage for at least 24 hours or wet storage for 72 hours; and hardness increased after dry storage for at least 24 hours or wet storage for up to 72 hours. The Weibull modulus remained unchanged under any of the distinct storage conditions. Dry storage resulted in greater characteristic strength than the control, whereas wet storage contributed to higher strength values only at shorter periods (up to 24 hours). Overall, the inherent properties of RBCs with a similar composition to that tested in this study may change with varying storage conditions and periods.","PeriodicalId":9240,"journal":{"name":"Brazilian oral research","volume":"38 ","pages":"e062"},"PeriodicalIF":1.5,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11376674/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141626016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0