Dental Hypotheses最新文献_第2页

Whether Enough Attention is Being Paid to the Ethical Concerns Regarding the Use of Artificial Intelligence in Dentistry? 是否对在牙科中使用人工智能的伦理问题给予了足够的关注？

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Dental Hypotheses Pub Date : 2023-07-01 DOI: 10.4103/denthyp.denthyp_96_23

P. Iranmanesh, R. Franco, Marzeyeh Taghizadeh, H. Mirmohammadi, G. Hasselgren, Heejung Bang, Jafar Kolahi

引用次数: 1

Comparison of Different Rotary Nickel–titanium Systems to Evaluate Coronal Leakage of Root Canals: An in Vitro Study 不同旋转镍钛系统评价根管冠状动脉渗漏的比较：体外研究

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Dental Hypotheses Pub Date : 2023-07-01 DOI: 10.4103/denthyp.denthyp_37_23

Rasha M. Al-Shamaa

{"title":"Comparison of Different Rotary Nickel–titanium Systems to Evaluate Coronal Leakage of Root Canals: An in Vitro Study","authors":"Rasha M. Al-Shamaa","doi":"10.4103/denthyp.denthyp_37_23","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_37_23","url":null,"abstract":"Introduction: The objective of the study was to assess coronal leakage following root canal treatment utilizing four Micro Mega rotary nickel–titanium files, specifically One shape, Two shape (s1), Two shape (s2), and Revo-S, by means of dye penetration analysis using a stereomicroscope set at 20× magnification. Methods: Fifty human lower premolar teeth that were extracted for orthodontic reasons were included in the study, excluding teeth with cracks, caries, severe curvature (<25°), or root resorption. The teeth were randomly assigned to five groups using www.random.orgwww.random.org, and standard endodontic treatments were performed as per the manufacturer’s instructions using Micro Mega One shape, Two shape (s1), Two shape (s2), and Revo-S rotary nickel–titanium systems. To measure dye penetration, the teeth were immersed in a 2% methylene blue dye solution for approximately 24 hours and then axially split using a diamond sectioning disc, with measurements taken using a stereomicroscope. Results: The study groups showed statistically significant differences (P < 0.001), and all pairwise comparisons were found to be significantly different according to the post hoc test (P < 0.001). Conclusion: Our results showed that various rotary file designs significantly affect coronal leakage.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"14 1","pages":"81 - 83"},"PeriodicalIF":0.5,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49512170","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

Effect of Dentin Surface Pretreatment With Chitosan Nanoparticles on Immediate and Prolonged Shear Bond Strength of Resin Composite: An in Vitro Study 壳聚糖纳米粒子预处理牙本质对树脂复合材料即刻和长期剪切结合强度的影响：体外研究

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Dental Hypotheses Pub Date : 2023-07-01 DOI: 10.4103/denthyp.denthyp_48_23

S. Abdul-razzaq, Muna Khalaf

{"title":"Effect of Dentin Surface Pretreatment With Chitosan Nanoparticles on Immediate and Prolonged Shear Bond Strength of Resin Composite: An in Vitro Study","authors":"S. Abdul-razzaq, Muna Khalaf","doi":"10.4103/denthyp.denthyp_48_23","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_48_23","url":null,"abstract":"Introduction: The objective of this study was to evaluate the impact of chitosan nanoparticles’ pretreatment of dentin surface on the macro shear bond strength of resin composite, both immediately and over an extended period. Methods: Thirty caries-free, unrestored human premolars were randomly assigned to six study groups. The dentin surface of the intervention groups underwent pretreatment with 0.2% chitosan and 0.05% NaF solutions for 1 minute. A standard etch-and-rinse adhesive procedure was performed for all the study groups. After 24 hours, half of the specimens underwent a macro shear bond strength test at a crosshead speed of 1 mm/min, whereas the other specimens underwent the same procedure after 300 thermal cycles between 5 and 55°C with a 30-second dwell time in the thermocycling device. Results: The study found that the type of dentin surface treatment agents did not significantly affect the shear bond strength (P = 0.52). However, there were statistically significant differences between immediate and prolonged shear bond strength in the chitosan (P < 0.01) and the control groups (P = 0.005). On the other hand, there were no significant differences between the immediate and prolonged shear bond strength in the NaF group (P = 0.997). Conclusion: Dentin pretreatment with 0.2% chitosan solution did not significantly affect the shear bond strength of the etch-and-rinse adhesive system. Pretreatment with NaF maintained the shear bond strength of the adhesive to dentin after 300 thermal cycles.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"14 1","pages":"84 - 86"},"PeriodicalIF":0.5,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46637544","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

The Influence of Dental Implant Roughness on Biofilm Formation: A Comprehensive Strategy 种植体粗糙度对生物膜形成的影响:一个综合策略

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Dental Hypotheses Pub Date : 2023-07-01 DOI: 10.4103/denthyp.denthyp_67_23

R. Franco, Alessio Rosa, E. Lupi, M. Capogreco

引用次数: 0

Effect of Feeding Pattern and Salivary Level of Growth Hormone on the Stage of Primary Tooth Eruption: An Analytical Cross-Sectional Study 喂养方式和唾液生长激素水平对乳牙萌出阶段的影响:一项分析性横断面研究

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Dental Hypotheses Pub Date : 2023-04-01 DOI: 10.4103/denthyp.denthyp_43_23

Dhay Haider Hassan, Shahbaa Al-joranii

引用次数: 0

Collaboration Over Borders: From Clinical Dentistry To Quantum Biology 跨国界合作:从临床牙科到量子生物学

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Dental Hypotheses Pub Date : 2023-04-01 DOI: 10.4103/denthyp.denthyp_62_23

G. Hasselgren

引用次数: 0

Serum and Salivary Vitamin B12 Levels among Iron Deficiency Anemia Patient with Recurrent Aphthous Stomatitis: An Analytical Cross-Sectional Study 缺铁性贫血伴复发性口腔炎患者血清和唾液维生素B12水平:一项分析性横断面研究

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Dental Hypotheses Pub Date : 2023-04-01 DOI: 10.4103/denthyp.denthyp_59_23

Ghaith Al-hamdani, L. Yas

{"title":"Serum and Salivary Vitamin B12 Levels among Iron Deficiency Anemia Patient with Recurrent Aphthous Stomatitis: An Analytical Cross-Sectional Study","authors":"Ghaith Al-hamdani, L. Yas","doi":"10.4103/denthyp.denthyp_59_23","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_59_23","url":null,"abstract":"Introduction: We aimed to evaluate serum and salivary vitamin B12 levels in patients with iron deficiency anemia (IDA) with and without recurring aphthous ulcers (RAS). Methods: Study participants were divided into three groups, clinically healthy control group (n = 25), an IDA patient with RAS (n = 25), and an IDA without RAS (n = 25). The enzyme-linked immunosorbent assay (ELISA) method was used to assess the serum and salivary B-12 levels blindly. Data analyses were performed using one-way ANOVA and the Tukey’s post hoc test using R software. Result: There were statistically significant differences regarding serum and salivary B12 levels among study groups (P<0.001). All pairwise comparisons showed significant differences regarding serum (P<0.001) and salivary (P ≤ 0.002) B12 levels. Conclusion: The Control group (396 ± 18.2 pg/mL) was within the normal serum level of vitamin B12 (200-900 pg/mL), while in IDA with RAS (111 ± 15.4 pg/mL) and IDA without RAS (145 ± 57.2 pg/mL) serum level of vitamin B12 is lower than the normal range and significantly lower than the control group.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"14 1","pages":"55 - 58"},"PeriodicalIF":0.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46053612","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

Bilinear Numerical Analysis of the Structural Behavior of a Dental Implant Applied as a Biomaterial Carbon Fiber Reinforced Polyether-Ether-Ketone (CFR-PEEK): A Finite Element Analysis 生物材料碳纤维增强聚醚酮(CFR-PEEK)牙种植体结构行为的双线性数值分析:有限元分析

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Dental Hypotheses Pub Date : 2023-04-01 DOI: 10.4103/denthyp.denthyp_42_23

Miguel Martinez-Mondragon, G. Urriolagoitia-Sosa, B. Romero-Ángeles, Juan Pérez-Partida, Itzel Cruz-Olivares, G. Urriolagoitia-Calderón

{"title":"Bilinear Numerical Analysis of the Structural Behavior of a Dental Implant Applied as a Biomaterial Carbon Fiber Reinforced Polyether-Ether-Ketone (CFR-PEEK): A Finite Element Analysis","authors":"Miguel Martinez-Mondragon, G. Urriolagoitia-Sosa, B. Romero-Ángeles, Juan Pérez-Partida, Itzel Cruz-Olivares, G. Urriolagoitia-Calderón","doi":"10.4103/denthyp.denthyp_42_23","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_42_23","url":null,"abstract":"Introduction: This research aims to compare the distribution of stresses and general displacements between different dental implant abutments against a healthy tooth, as well as the mechanical behavior of the carbon fiber-reinforced polyether-ether-ketone (CFR-PEEK) material under load conditions. Methods: A biomodel of a healthy tooth was implemented by computed tomography (CT), considering three essential parts of the tooth (enamel, dentin, and pulp). Three different dental abutments were produced using the SolidWorks computer program. Applying the finite element method (FEM), a numerical evaluation was performed by introducing a critical load of 550 N and then unloading it to 0 N taking into consideration the behavior of the material (titanium and CFR-PEEK) as bilinear, isotropic, and homogeneous. Results: The difference in stress and total displacement between the dental implant (titanium and CFR-PEEK) and the healthy tooth was significant, going from critical stress values of 1087 to 324 MPa. Conclusion: When removing the load from the CFR-PEEK material, it presented residual stresses because the material passed its elastic limit despite this, demonstrating a better mechanical behavior than titanium.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"14 1","pages":"45 - 48"},"PeriodicalIF":0.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41496221","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

Management Of Clear Aligner-related Severe Enamel Demineralization With A Modified Resin Infiltration Technique: A Case Report 改良树脂浸润技术治疗透明矫正器相关重度牙釉质脱矿1例

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Dental Hypotheses Pub Date : 2023-04-01 DOI: 10.4103/denthyp.denthyp_18_23

V. Ngoc, Pham Ha, Dang Hung, N. Anh

{"title":"Management Of Clear Aligner-related Severe Enamel Demineralization With A Modified Resin Infiltration Technique: A Case Report","authors":"V. Ngoc, Pham Ha, Dang Hung, N. Anh","doi":"10.4103/denthyp.denthyp_18_23","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_18_23","url":null,"abstract":"Introduction: Enamel demineralization expressed as white spot lesions (WSLs) has been reported to be associated with both fixed and removable orthodontic appliances. Case report: This case report described the management of a patient with clear aligner-related severe enamel demineralization using a modified resin infiltration technique. Microabrasion with Opalustre (Ultradent, Utah, USA) was performed to remove the remineralized enamel surface followed by repeated etching with ICON Etch (DMG, Hamburg, Germany) until the WSLs disappeared after ethanol application. A #12 blade could be used to check whether the superficial layer was demineralized enough for the resin to infiltrate. The ICON-Infiltrant (DMG, Hamburg, Germany) was applied to the etched enamel and light-cured. After treatment, all the WSLs showed improvement with the color nearly matching the adjacent sound enamel. Discussion: Modified resin infiltration technique combined with microabrasion could be an effective noninvasive method to treat severe enamel demineralization including shallow localized enamel breakdown. However, more clinical studies are required to assess the efficacy and safety of this method.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"14 1","pages":"66 - 68"},"PeriodicalIF":0.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49164257","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

Evaluation Of The Push-out Bond Strength Of The Bio-C Repair And Compare It With The Mineral Trioxide Aggregate And Amalgam When Used As Root-end Filling Material: An In Vitro Study 生物c修复体的推出粘结强度评价及与三氧化二矿骨料和银汞合金作为根端充填材料的比较

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Dental Hypotheses Pub Date : 2023-04-01 DOI: 10.4103/denthyp.denthyp_160_22

F. Hammadi, Zainab M. Abdul-Ameer

{"title":"Evaluation Of The Push-out Bond Strength Of The Bio-C Repair And Compare It With The Mineral Trioxide Aggregate And Amalgam When Used As Root-end Filling Material: An In Vitro Study","authors":"F. Hammadi, Zainab M. Abdul-Ameer","doi":"10.4103/denthyp.denthyp_160_22","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_160_22","url":null,"abstract":"Introduction: We aimed to assess the push‐out bond strength of BIO-C REPAIR (a ready-to-use bioceramic material), and compare it with the mineral trioxide aggregate (MTA) and аmаlgаm. Methods: A total of 30 single-rooted, straight human maxillary central incisors were chosen. To keep the root canal length at 15 mm, the crown was resected. The teeth underwent endodontic treatment, along with the resection of their root ends and preparation of root-end cavities. The teeth were randomly allocated into three groups as follows: BIO-C REPAIR, MTА, and Zinc-free аmаlgаm. Utilizing a universal testing machine, the push-out test was done and the digital microscope was used to assess failure made. Data were analyzed by the one-way ANOVA and chi-square test using the Python software. Results: Statistically significant difference was found among study groups regarding push-out bond strength (p < 0.001) and mode of failure (p < 0.001). Post-hoc test showed MTA has significantly lower push-out bond strength than BIO-C REPAIR and amalgam (p < 0.001). Conclusion: Within the limitation of this study, the push‐out bond strength for BIO-C REPAIR was higher than the MTA and nearly similar to the amalgam.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"14 1","pages":"62 - 65"},"PeriodicalIF":0.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46701070","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