Dental Hypotheses最新文献_第5页

Efficacy of Application of Periodontal Ligament Stem Cells in Bone Regeneration: A Systematic Review of Animal Studies 牙周韧带干细胞在骨再生中的应用:动物研究的系统综述

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_136_22

Pardis Aghandeh, Farnaz Kouhestani, Fatemeh Isamorad, S. Akbari, Behrad Tanbakuchi, S. Motamedian

{"title":"Efficacy of Application of Periodontal Ligament Stem Cells in Bone Regeneration: A Systematic Review of Animal Studies","authors":"Pardis Aghandeh, Farnaz Kouhestani, Fatemeh Isamorad, S. Akbari, Behrad Tanbakuchi, S. Motamedian","doi":"10.4103/denthyp.denthyp_136_22","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_136_22","url":null,"abstract":"Introduction: We aimed to systematically review the animal studies that have investigated the efficacy of periodontal ligament stem cells (PDLSCs) in bone regeneration. Methods: Web of science, Scopus, PubMed, Embase, Cochrane Library, and ProQuest were searched to September 2022 for animal studies investigating bone regeneration using PDLSCs. Results: Twenty studies were included. Calvaria and alveolar defects were treated with stem cells. The cells were mainly carried with hydrogel, hydroxyapatite, and collagen scaffolds. PDLSCs promoted osteogenesis compared with cell-free scaffolds, except in one study where biphasic calcium phosphate block scaffolds alone or with Bone morphogenic protein 2 had superior outcomes in calvaria defects. Controversial results were reported when comparing the osteogenic potential of PDLSCs and bone marrow stem cells. Two studies reported higher potential in BMSCs, and two others reported higher bone formation and more bone quality in PDLSCs. Conclusion: With the limitations of this study, PDLSCs might have promising potential to accelerate bone regeneration in artificial defects; however, due to high heterogeneity in the outcomes of the present studies, before moving forward to human experiments, further preclinical in vivo studies are needed.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"111 - 116"},"PeriodicalIF":0.5,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48954439","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

Lessons Learned from the COVID-19 Pandemic in Implant Dentistry Settings 从2019冠状病毒病大流行中吸取的经验教训

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_119_22

Mohammed Hussein Hussein Alsharbaty, Moein Shirazi, N. Mohammed, Fatemeh Akbari

{"title":"Lessons Learned from the COVID-19 Pandemic in Implant Dentistry Settings","authors":"Mohammed Hussein Hussein Alsharbaty, Moein Shirazi, N. Mohammed, Fatemeh Akbari","doi":"10.4103/denthyp.denthyp_119_22","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_119_22","url":null,"abstract":"In 2019, Wuhan city of China announced the epidemic of COVID-19 as a public health disaster which has been recognized as an uncommon type of single stranded RNA virus belonging to Coronaviridae family and then quickly spread all over the world. Clinically symptomatic patients are identified as the primary source of COVID-19 transmission. Most of dental procedures require the use of high-speed handpieces which leads to aerosol generation. Implant dentistry is the field of dentistry which deals with prosthetic rehabilitation with minimal aerosol generation ensuring an aseptic surgical environment. There are several decisive recommendations regarding COVID-19 precautions that should be appreciated in implant dentistry. Sharp drills in slow speed drilling machines are preferred during surgery. Regular irrigation with high volume suction is greatly encouraged. Osteotomes are encouraged over ultrasonic devices to minimize the generation of aerosols during surgical procedures. Immediate implants placement is more preferred as the number of visits to the dentists is reduced. Impression techniques should be shifted to the digital approach instead of conventional methods. Full mouth rehabilitation cases requiring complex procedures should be accomplished restrictedly.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"158 - 161"},"PeriodicalIF":0.5,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44651179","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

Could Mouth Breathing Lead to Adenoid Hypertrophy? 口腔呼吸会导致腺样体肥大吗?

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_132_22

Xiao-Kai Ma, Qingyu Wang

引用次数: 0

Assessment of the Relationship between Expression of p63 with Different Clinical Types of Oral Lichen Planus: A Retrospective Immunohistochemistry Study p63表达与口腔扁平苔藓不同临床类型的关系:回顾性免疫组织化学研究

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_83_22

M. Abdulhussain, Karrar N. Shareef, M. Zubidi

{"title":"Assessment of the Relationship between Expression of p63 with Different Clinical Types of Oral Lichen Planus: A Retrospective Immunohistochemistry Study","authors":"M. Abdulhussain, Karrar N. Shareef, M. Zubidi","doi":"10.4103/denthyp.denthyp_83_22","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_83_22","url":null,"abstract":"Introduction: We aimed to assess the expression of p63 among different clinical types of oral lichen planus. Methods: The current study includes 44 oral lichen planus cases from the oral pathology laboratory, oral diagnostic department, Baghdad University. P63-PRM114P used as primary monoclonal antibodies. The intensity of immunohistochemistry activity was calculated utilizing the following criteria: weak intensity: one positive cell, moderate intensity: two positive cells, and strong intensity: three or more positive cells (magnification 20×). Results: The mean age of participants was 52.82 ± 12. No significant relationship found between gender and expression of p63 (P = 0.65). The p63 expressed in all clinical types of oral lichen planus (OLP). Yet, expression of p63 was not significantly related to the clinical type of OLP (P = 0.98). Conclusion: We could not found relationship between expression of p63 among different clinical types of oral lichen planus. With respect to the limited sample size of this study, some larger scale studies among different populations are need to reach to a definitive conclusion regarding relationship between expression of p63 among different clinical types of oral lichen planus.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"132 - 135"},"PeriodicalIF":0.5,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46101919","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

Assessment of the Correlation between Gender and Third Molar Surgery Duration 性别与第三磨牙手术时间的相关性评估

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_101_22

E. Abdulkareem, Mohammed M. Ali, Sabah Abdul Rasool Hammoodi, Riyam Talib

引用次数: 0

Comparative Evaluation of Marginal Microleakage Between Bulk-Fill, Preheated Bulk-Fill, and Bulk-Fill Flowable Composite Resins Above and Below Cemento-Enamel Junction Using Micro-Computed Tomography: An In Vitro Study 使用微型计算机断层扫描技术对水泥-搪瓷连接上方和下方的散装填充、预热散装填充和散装填充可流动复合树脂的边际微渗漏进行比较评估：一项体外研究

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_104_22

Nidhal Dilian, A. Kadhim

{"title":"Comparative Evaluation of Marginal Microleakage Between Bulk-Fill, Preheated Bulk-Fill, and Bulk-Fill Flowable Composite Resins Above and Below Cemento-Enamel Junction Using Micro-Computed Tomography: An In Vitro Study","authors":"Nidhal Dilian, A. Kadhim","doi":"10.4103/denthyp.denthyp_104_22","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_104_22","url":null,"abstract":"Objective: The aim of this study was to compare the marginal microleakage between bulk-fill, preheated bulk-fill, and bulk-fill flowable composite resins above and below cemento-enamel junction (CEJ) using micro-computed tomography. Methods: Sixty freshly extracted premolar teeth were prepared with a slot shaped cavities of a total of 120 Class II: 3 mm (bucco-lingual), 2 mm (mesio-distal) with mesial gingival margin located 1 mm coronal to CEJ, and distal gingival margin located 1 mm apical to the CEJ. The samples were randomly divided into two main groups according to the restorative material (Tetric EvoCeram and 3M Filtek), and each group was further sub-divided into three subgroups according to the consistency (bulk fill, preheated bulk fill, and bulk fill flowable). The specimens were thermocycled (500 cycles, 5–55 °C, 30 seconds dwell time) and immersed in a 50% ammonical silver nitrate for 24 hours. Microleakage was evaluated using micro-CT. Data analyzed via three-way ANOVA and random forest model (a machine learning algorithm). Results: There was no statistically significant three-way interaction between type of composite, location of gingival margin related to CEJ, and filling technique (P = 0.103). However, the random forest model (a machine learning algorithm) showed type of composite is the most influential factor. Conclusion: Within the limitations of this study, considering the importance of the type of composite, the teeth restored with preheated bulk fill composite showed decrease in microleakage in comparison with bulk fill flowable composite.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"128 - 131"},"PeriodicalIF":0.5,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47412971","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: 3

Comparison of Shear Bond Strength of Three Luting Materials Used in Band and Loop Space Maintainer Cementation: An In Vitro Study 三种Luting材料用于带和环空间保持器胶结的剪切强度比较:体外研究

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_114_22

Sara Zaidan, Reem A. Rafeeq

引用次数: 1

Efficacy of Three Commercially Available Fluoride Releasing Varnishes in Remineralization of Artificial White Spot Lesions Evaluated by Laser Fluorescence: An In Vitro Study 三种市售释氟清漆对人工白斑损伤再矿化作用的激光荧光评价：体外研究

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_79_22

Abeer Abdul-Kareem Hussain, Reem A. Rafeeq

引用次数: 1

Shade Matching of OMNICHROMA Analyzed by Four Digital and Visual Shade Selection Techniques: An In Vitro Study 用四种数字和视觉阴影选择技术分析OMNICHROMA的阴影匹配：体外研究

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Dental Hypotheses Pub Date : 2022-10-01 DOI: 10.4103/denthyp.denthyp_88_22

A. Al-Hadithi, M. Gholam

引用次数: 2

Does the Position of the Third Molar Have an Influence on the Location of Mandibular Fractures? 第三磨牙的位置对下颌骨骨折的位置有影响吗？

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Dental Hypotheses Pub Date : 2022-07-01 DOI: 10.4103/denthyp.denthyp_64_22

Julio Cesar Moretti, Rubens Camino Junior, Celso Palmieri Jr, J. Luz

{"title":"Does the Position of the Third Molar Have an Influence on the Location of Mandibular Fractures?","authors":"Julio Cesar Moretti, Rubens Camino Junior, Celso Palmieri Jr, J. Luz","doi":"10.4103/denthyp.denthyp_64_22","DOIUrl":"https://doi.org/10.4103/denthyp.denthyp_64_22","url":null,"abstract":"Introduction: This study evaluated the possible influence of the lower third molar and its position on the location of fractures in all mandibular regions. Methods: Computed tomography scans of patients with mandibular fractures in any region seen between August 2018 and July 2019 were evaluated. The presence and classification of third molars according to their vertical and horizontal positions and angulations were analyzed. Data were analyzed using the chi-square test, tree algorithm, and random forest model. Results: A total of 49 patients with mandibular fractures were seen and 40 patients (80% men), with a mean age of 33.4 years, were included. There was no correlation between fracture location and the vertical (P = 0.93) and horizontal (P = 0.76) Pell and Gregory classifications. There was a statistically significant relationship between fracture location and the Winter angulation classification (P = 0.01). Conclusion: Relative to the possible influence of lower third molars and their position on the location of mandibular fractures in all mandibular regions, only the angulation of the third molar had an influence. There was no correlation between the presence and the classifications of third molar impaction.","PeriodicalId":43354,"journal":{"name":"Dental Hypotheses","volume":"13 1","pages":"86 - 89"},"PeriodicalIF":0.5,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49325697","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