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Adaptation of Relined Fiber Post Using Discontinuous Short Fiber-Reinforced Resin Composite to Restore Weakened Endodontically-Treated Premolars 不连续短纤维增强树脂复合材料修复弱根管治疗的前磨牙
Q4 Dentistry Pub Date : 2023-04-21 DOI: 10.1055/s-0043-57245
Dawood Salman Dawood Alshetiwi, N. A. Muttlib, H. M. El-Damanhoury, Rabihah Alawi, N. Rahman, N. Elsahn
Abstract Objective  This study aimed to investigate the effect of relining prefabricated fiber-reinforced composite (FRC) posts using bulk-fill, flowable, discontinuous short fiber-reinforced composite (SFRC) on intracanal adaptation in weakened endodontically-treated premolar teeth. Materials and Methods  Forty extracted human premolar teeth were selected and randomly allocated to five groups ( n  = 8) according to the canal preparation method and restorative technique after endodontic treatment: Group 1 (control): nonflared, closed apex root canals; group 2, 4: flared, open-apex root canals; group 3, 5: flared, closed apex root canals. Groups 1 to 3 were restored with standard RelyX fiber post size #1, while groups 4 and 5 were restored with customized RelyX fiber post size #1 and relined with bulk-fill flowable SFRC (everX Flow, GC, Tokyo, Japan). To evaluate intracanal adaptation, the empty root of each sample with the corresponding fiber post (standard or customized) inserted was measured twice using a micro-digital scale and the average value was calculated. The post was then removed, followed by the insertion of a light body polyvinyl siloxane (PVS) impression material into the canal, followed by reinsertion of the post and removal of excess material once the PVS was set. Finally, the sample weight was recorded, and the data were analyzed using one-way analysis of variance and the Bonferroni post hoc test ( p -value = 0.05). Results  A statistically significant difference ( p  < 0.05) in PVS material weight was identified between the groups. Group 1 (control) had the lightest weight of PVS material, followed by groups restored with customized fiber posts (groups 4 and 5) and standard fiber posts (groups 2 and 3). Conclusion  Anatomically-customized fiber posts with bulk-fill flowable SFRC provided better intracanal adaptation compared with standard fiber posts in teeth with compromised root canals.
抽象目标 本研究旨在研究使用大块填充、可流动、不连续的短纤维增强复合材料(SFRC)重新填充预制纤维增强复合物(FRC)桩对弱化牙髓治疗的前臼齿的管内适应的影响。材料和方法 选取40颗拔除的人类前臼齿,随机分为5组(n = 8) 根据根管预备方法和根管治疗后的修复技术:第1组(对照组):无肥大、封闭的根尖根管;第2、4组:扩口,开放的根尖根管;第3组,第5组:扩口,封闭的根尖根管。第1组至第3组用标准RelyX纤维桩尺寸#1恢复,而第4组和第5组用定制RelyX光纤桩尺寸#1进行恢复,并用散装填充可流动SFRC(everX Flow,GC,Tokyo,Japan)重新衬里。为了评估肛门内适应,使用微型数字量表测量插入相应纤维桩(标准或定制)的每个样本的空根两次,并计算平均值。然后移除柱,随后将轻质聚乙烯基硅氧烷(PVS)印模材料插入管中,随后重新插入柱并在PVS设置后移除多余材料。最后,记录样本权重,并使用单向方差分析和Bonferroni事后检验(p值 = 0.05)。结果 统计学显著性差异(p < 0.05)。第1组(对照组)的PVS材料重量最轻,其次是用定制纤维桩修复的组(第4组和第5组)和标准纤维桩(第2组和第3组)。结论 在根管受损的牙齿中,与标准纤维桩相比,具有大量填充可流动SFRC的解剖定制纤维桩提供了更好的管内适应能力。
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引用次数: 1
Dimensional Optimization of Graphene-Modified Polymethyl Methacrylate Material Used as an Aesthetic Removable Partial Denture Clasp Material 石墨烯改性聚甲基丙烯酸甲酯材料美学可摘局部义齿卡环材料的尺寸优化
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0043-1768046
Mostafa Omran Hussein
Abstract Objective  Although graphene-modified polymethyl methacrylate material is a good candidate for partial denture clasp material, it lacks adequate strength. Therefore, the study aims to assess the optimal dimension of this nanomodified material required for such an application. Materials and Methods  A parametric finite element analysis study was conducted on 54 clasp 3D models at two displacement levels (0.25–0.5 mm) placed 3 mm from the clasp tip. The clasp models were categorized based on the dimensions into A, B, and C (3 subgroups in each) and six tapers from the tip to the base (0.5–1). Both reaction force in (N) and maximum principal stress in (MPa) were recorded and analyzed. The study was validated using the mechanical tester after digital manufacturing of the clasp specimens that showed satisfactory results. Statistical Analysis  The correlations between width and thickness against reaction force and maximum principal stress were checked by a statistical analysis software package (SPSS version 22; IBM Corp., Armonk, New York, United States). Data of the reaction force demonstrated nonparametric behavior, as tested by the Kolmogorov–Smirnov test. Accordingly, Spearman's rho test for correlation was used. In contrast, the maximum principal stress data showed normal distribution, as tested by the Kolmogorov–Smirnov test. Thus, Pearson's test of correlation was applied. Results  The results demonstrated the best retention force values, considering aesthetics, in subgroups C3 (taper 0.6), C3 (taper 0.8), and B3 (taper 1). The maximum principal stress results showed the highest values in group C followed by group B and then group A. Positive correlations were calculated between thickness and width versus reaction force and maximum principal stress. The correlation coefficient value between thickness and reaction force was 0.699 and that between width and reaction force was 0.621, while the correlation coefficient between thickness and maximum principal force was 0.899 and that between the width and maximum principal force was 0.740. Conclusion  It could be concluded that the studied material might be recommended as a valid aesthetic clasp material. Both clasp thickness and width showed a positive correlation with the clasp retention force with more impact by the thickness.
抽象目标 尽管石墨烯改性聚甲基丙烯酸甲酯材料是局部义齿卡环材料的良好候选者,但它缺乏足够的强度。因此,本研究旨在评估这种应用所需的纳米改性材料的最佳尺寸。材料和方法 在两个位移水平(0.25–0.5 mm)放置3 mm。根据尺寸将卡扣模型分为A、B和C(各3个子组)和从尖端到底部的六个锥度(0.5-1)。记录并分析(N)中的反作用力和(MPa)中的最大主应力。在对卡环样品进行数字化制造后,使用机械测试仪对该研究进行了验证,结果令人满意。统计分析 宽度和厚度与反作用力和最大主应力之间的相关性通过统计分析软件包(SPSS版本22;IBM Corp.,Armonk,New York,United States)进行检查。通过Kolmogorov–Smirnov检验,反作用力数据显示出非参数行为。因此,使用了Spearman的rho检验进行相关性分析。相反,通过Kolmogorov–Smirnov检验,最大主应力数据显示正态分布。因此,应用了皮尔逊相关性检验。后果 结果表明,考虑美观性,C3(锥度0.6)、C3(锥度0.8)和B3(锥度1)组的保持力值最佳。最大主应力结果显示,C组的值最高,其次是B组,然后是A组。厚度和宽度与反作用力和最大主应力正相关。厚度与反作用力之间的相关系数值为0.699,宽度与反作用力的相关系数字为0.621,厚度与最大主力之间的相关系数为0.899,宽度与其最大主力的相关系数是0.740。结论 可以得出结论,所研究的材料可能被推荐为一种有效的美学卡环材料。卡环厚度和宽度与卡环固位力呈正相关,卡环厚度对卡环固力的影响更大。
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引用次数: 0
Presurgical Nasoalveolar Molding—Efficacy and Biomechanics in Management of Cleft Lip and Palate: A Review of the Literature 唇腭裂术前鼻窝塑形的疗效及生物力学研究——文献综述
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0042-1760447
H. M. Alkhames, Murali Venkata Rama Mohan Kodali, E. Nasir, Mohamed Hassan, Unati Sai Kodali
Abstract Presurgical infant orthopaedics (PSIO) appliances are used in the management of cleft lip and palate. Frequently, among all PSIO appliances utilized is presurgical nasoalveolar molding (NAM) appliance. In this review, we looked for the application of the NAM appliance, its efficacy, and biomechanics. A comprehensive search strategy was performed in two databases (Google Scholar and PubMed) for articles using NAM in the treatment plan of patients with cleft lip and palate. Six articles were included in this study with one randomized control trial, two retrospective, and three case reports studies. The studies reveal the NAM is efficient as a presurgical modality treatment for complete cleft lip and palate with multiple benefits, including reducing surgical scars and alveolar gap, used as feeding plate, improve nasal contour, and decreased the number of rectifying surgical procedure.
摘要术前婴儿整形外科(PSIO)矫治器用于唇腭裂的治疗。在所有使用的PSIO矫治器中,经常使用的是术前鼻牙槽成型(NAM)矫治器。在这篇综述中,我们寻找NAM矫治器的应用、疗效和生物力学。在两个数据库(Google Scholar和PubMed)中对唇腭裂患者治疗计划中使用NAM的文章进行了全面的搜索策略。本研究共纳入6篇文章,包括一项随机对照试验、两项回顾性研究和三项病例报告研究。研究表明,NAM是一种有效的术前治疗完全性唇腭裂的方法,具有多种益处,包括减少手术疤痕和牙槽间隙,用作喂养板,改善鼻腔轮廓,减少矫正手术次数。
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引用次数: 0
The Knowledge and Practices of the Absolute and Relative Dental Implant Contraindications of General Dental Practitioners in Riyadh, Saudi Arabia 沙特阿拉伯利雅得普通牙科医生的绝对和相对种植体禁忌症的知识和实践
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0043-1768063
K. Ababneh, F. Farook, Tala Al Kharashi, Samar Al Arfaj, Renad I. Allahim
Abstract Objectives  General dental practitioners (GDPs) are faced with increasing numbers of patients requesting dental implants (DI) to replace missing teeth. Being the first dental professional consulting with the patient, being knowledgeable about DI contraindications (DIC) would support the development of appropriate treatment plans. This study aimed to investigate the GDPs level of knowledge of a number of DICs. The study was done in Riyadh, KSA. Materials and Methods  A structured electronic questionnaire was distributed to GDPs who consented to participate. Participants were asked whether certain systemic and local conditions were considered DIC, and whether such DIC were considered absolute or relative. Descriptive statistics, t -tests, or one-way analysis of variance, and multiple linear regression were used for the statistical analysis ( p ≤ 0.05) to assess the association between the sample characteristics and knowledge of DICs. Results  Less than half (42%) of the respondents scored 25 to 50%, and only 2% scored 75 to 100%. The highest proportion of correct responses was related to questions regarding old age (74.09%), glycemic categories (68.52%), active chemotherapy (64.07%), and intravenous bisphosphonates (49.86%). The responses were significantly associated with the years of experience, place of graduation, and highest qualification in DI. Based on the linear regression analysis, higher years of practice were associated with less knowledge of DIC (inverse relationship), graduates of Saudi governmental universities scored higher than the other groups of graduates, and holders of a master's degree in DI scored higher compared to holders of other qualifications. In addition, respondents who received lectures and/or laboratory training as part of their undergraduate curriculum had higher scores than the group who did not. Conclusion  The level of DIC-related knowledge of the GDPs in Riyadh is generally good but incomplete; it is significantly influenced by the GDPs' years of practice, place of graduation, qualifications, and receiving didactic and laboratory training in the undergraduate programs. More emphasis on DI and DIC is required to improve treatment planning and patient referral.
抽象目标 全科医生(GDP)面临着越来越多的患者要求种植牙(DI)来替换缺失的牙齿。作为第一位咨询患者的牙科专业人士,了解DI禁忌症(DIC)将有助于制定适当的治疗计划。本研究旨在调查一些DIC的GDP知识水平。这项研究是在沙特阿拉伯首都利雅得进行的。材料和方法 向同意参与的GDP分发了一份结构化的电子问卷。参与者被问及某些系统性和局部性疾病是否被视为DIC,以及这种DIC是绝对的还是相对的。统计分析采用描述性统计、t检验或单向方差分析和多元线性回归(p≤0.05)来评估样本特征与DIC知识之间的相关性。后果 不到一半(42%)的受访者得分在25%到50%之间,只有2%的人得分在75%到100%之间。正确回答的比例最高的是关于老年(74.09%)、血糖类别(68.52%)、主动化疗(64.07%)和静脉注射双磷酸盐(49.86%)的问题。这些回答与DI的经验年限、毕业地点和最高资格显著相关。根据线性回归分析,实践年限越长,对DIC(反比关系)的了解越少,沙特政府大学的毕业生得分高于其他毕业生群体,DI硕士学位持有者得分高于其他学历持有者。此外,作为本科课程的一部分接受讲座和/或实验室培训的受访者比没有接受讲座和(或)实验室培训的人得分更高。结论 利雅得GDP的DIC相关知识水平总体良好,但不完整;这在很大程度上受到GDP实践年限、毕业地点、资格以及在本科项目中接受教学和实验室培训的影响。需要更加重视DI和DIC,以改进治疗计划和患者转诊。
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引用次数: 0
In vitro Study of Temperature Changes on the Outer Root Surface of Extracted Human Teeth Under Different Parameters of Intracanal Cryotherapy 不同肛门内冷冻治疗参数下拔除人牙外根表面温度变化的体外研究
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0042-1760674
Marieta Valentinova Todorova, S. Dimitrova, P. Zagorchev
Abstract Objectives  The aim of the present study is to investigate the temperature changes on the outer root surface of extracted human teeth during irrigation with different volumes of solutions at different temperatures. Materials and Methods  Thirty premolars extracted for orthodontic or periodontal indications were used for the first experiment and 12 for the second experiment. Root canals were instrumented using WaveOne Gold. Thermosensors were attached to the apical 5 mm and to the middle 5 mm of the outer root surface. Control irrigations with 0.9% NaCl, 2.5% NaOCl, and 17% EDTA at room temperature and experimental irrigations at 2.5°C with 0.9% NaCl, 2.5°C with 2.5% NaOCl, and 2.5°C with 17% EDTA were conducted. Results  During the intracanal cryotherapy, a minimum temperature more than 10°C lower than the initial temperature value was reached. There was no significant difference between the lowest temperature values reached in the irrigations carried out with the three irrigation solutions studied. These results indicate that the effect of intracanal cryotherapy can be successfully achieved using all three types of irrigation solutions, i.e., NaOCl, 0.9% NaCl, EDTA. Intracanal cryotherapy needed to last more than 2 minutes to achieve more than 10°C difference with the initial temperature. Conclusions  A total of 5 mL of irrigation solution for 5 min is insufficient to achieve a cryotherapeutic effect. A temperature difference of 10°C between initial and lowest temperatures recorded was reached fastest at a volume of 20 mL.
抽象目标 本研究的目的是研究在不同温度下用不同体积的溶液灌溉期间,被提取的人类牙齿外根表面的温度变化。材料和方法 为正畸或牙周适应症提取的30颗前磨牙用于第一个实验,12颗用于第二个实验。使用WaveOne Gold对根管进行仪器测量。热传感器连接在心尖5 mm和中间5 外部根部表面的mm。在室温下用0.9%NaCl、2.5%NaOCl和17%EDTA进行对照灌溉,并在2.5°C下用0.9%NaCl、2.5°C用2.5%NaOCl和2.5°C上用17%EDTA进行实验灌溉。后果 在肛门内冷冻治疗过程中,达到了比初始温度值低10°C以上的最低温度。所研究的三种灌溉溶液在灌溉过程中达到的最低温度值之间没有显著差异。这些结果表明,使用NaOCl、0.9%NaCl和EDTA这三种冲洗溶液都可以成功地达到肛门内冷冻治疗的效果。肛门内冷冻治疗需要持续2年以上 分钟,以实现与初始温度相差超过10°C。结论 共5个 mL冲洗溶液,用于5 min不足以达到冷冻治疗效果。在20的体积下,记录的初始温度和最低温度之间的温差达到了10°C mL。
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引用次数: 0
The Pattern in the Utilization of the First-Choice Antibiotic among Dentists in the Republic of Kosovo: A Prospective Study 科索沃共和国牙医首选抗生素使用模式:一项前瞻性研究
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0043-1768064
Lirim Mustafa, H. Islami, I. Šutej
Abstract Objective  Antibiotics are prescribed by dentists during dental treatments, depending on the diagnosis and severity of the disease. Appropriate indicators of the benefit of systematic and regular use of antibiotics in dentistry are limited, because a large number of dental and periodontal problems can be treated either by surgical intervention or by maintaining good oral hygiene. Improper use of antibiotics leads to antimicrobial resistance. In Kosovo, this problem is very evident and more studies are required to identify antibiotic prescribing patterns by health care workers. In this context, this study aims to investigate the issue of antibiotic use in dentistry. Materials and Methods  This prospective study was conducted for 6 months and followed the dental practice of 80 dentists. Data were collected from 795 patient forms. Results  After analysis, results showed that amoxicillin with clavulanic acid and amoxicillin alone were the most commonly prescribed antibiotics, each accounting for 35%. The most common indications for antibiotic prescription were dental and periodontal abscesses (24.9%), while 20.7% of antibiotics were prescribed for postextraction healing, pericoronitis (15%), chronic periodontitis (12.8%), and dry socket (11.5%). Conclusion  These results suggest that the problem of inappropriate antibiotic prescribing is not only overprescribing but also the selection of inappropriate agents, especially amoxicillin with clavulanic acid, instead of amoxicillin alone.
抽象目标 牙医在牙科治疗期间会根据疾病的诊断和严重程度开具抗生素处方。在牙科中系统和定期使用抗生素的益处的适当指标是有限的,因为大量的牙科和牙周问题可以通过手术干预或保持良好的口腔卫生来治疗。抗生素使用不当会导致抗微生物耐药性。在科索沃,这一问题非常明显,需要更多的研究来确定卫生保健工作者的抗生素处方模式。在此背景下,本研究旨在调查牙科中抗生素的使用问题。材料和方法 这项前瞻性研究进行了6个月,跟踪了80名牙医的牙科实践。数据收集自795份患者表格。后果 经过分析,结果显示,阿莫西林加克拉维酸和阿莫西林单独使用是最常见的处方抗生素,各占35%。抗生素处方最常见的适应症是牙周脓肿(24.9%),而20.7%的抗生素处方用于拔出后愈合、冠周炎(15%)、慢性牙周炎(12.8%)和干眼窝(11.5%) 这些结果表明,抗生素处方不当的问题不仅在于过量用药,还在于选择不适当的药物,尤其是阿莫西林和克拉维酸,而不是单独使用阿莫西林。
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引用次数: 0
Application of Magnesium Oxide Nanoparticles in Dentistry: A Literature Review 氧化镁纳米颗粒在牙科中的应用:文献综述
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0042-1760673
S. Sharifian, A. Loghmani, Shiva Nayyerain, Sanazgoli Javanbakht, Pouria Daneii
Abstract Magnesium oxide (MgO) nanoparticles' biocompatibility and degraded by-products are the two most important factors that make this material preferable in dental care. Their specific characteristics, such as antibacterial action against cariogenic microbes, are potential antibacterial agents for dental applications. This paper investigates the properties of MgO in dentistry and sets the groundwork for future research. Electronic databases, including PubMed/Medline, Scopus, Google Scholar, and scientific-research journals of domestic universities were reviewed from 1972 to 2022, and all the relevant papers were surveyed. After a search in electronic databases, 60 articles were involved, and the needed details were extracted. The biochemical features and application of magnesium oxide nanoparticles (MgONPs) in dentistry and new fields have been discussed in detail. Nanoparticles (NPs) may provide a unique method for treating and preventing dental infections. MgO nanoparticles are a good choice in several fields because their unique properties, such as antibacterial activity against cariogenic microorganisms, make them ideal antibacterial agents for dental applications.
摘要氧化镁(MgO)纳米颗粒的生物相容性和降解的副产物是使该材料在牙科护理中更受欢迎的两个最重要的因素。它们的特殊特性,如对致龋微生物的抗菌作用,是牙科应用的潜在抗菌剂。本文研究了MgO在牙科中的性能,为今后的研究奠定了基础。从1972年到2022年,包括PubMed/Medline、Scopus、Google Scholar在内的电子数据库以及国内大学的科研期刊进行了综述,并对所有相关论文进行了调查。在电子数据库中搜索后,共涉及60篇文章,并提取了所需的详细信息。详细讨论了氧化镁纳米粒子的生物化学特性及其在牙科和新领域的应用。纳米粒子(NP)可以为治疗和预防牙齿感染提供一种独特的方法。MgO纳米颗粒在几个领域都是一个很好的选择,因为它们独特的特性,如对致龋微生物的抗菌活性,使它们成为牙科应用的理想抗菌剂。
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引用次数: 0
Restorative Treatment Considerations for Black Triangle: A Case Series 黑三角的恢复性治疗:一个病例系列
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0043-1768047
H. M. Yusof, Nur Ayman Abdul Hayei
Abstract The interdental papilla is of utmost importance in smile aesthetics. Missing interdental tissue often raises an aesthetic concern; however, the issue is more than just an aesthetic complication. This study reviews the most commonly seen cases and methods to minimize the aesthetic complications caused by missing interdental tissue. The technique that will be discussed is from nonsurgical techniques, including composite restoration, indirect restorations, and gingival veneer. This article is clinically relevant in educating clinicians on various methods to restore and improve the optics that arise from a missing interdental papilla.
摘要齿间乳头在微笑美学中占有极其重要的地位。缺失的齿间组织通常会引起审美问题;然而,这个问题不仅仅是美学上的复杂问题。本研究综述了最常见的病例和方法,以尽量减少因齿间组织缺失引起的美学并发症。将要讨论的技术来自非手术技术,包括复合修复、间接修复和牙龈贴面。这篇文章在临床上与教育临床医生恢复和改善缺失的齿间乳头引起的光学效果的各种方法有关。
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引用次数: 0
Teledentistry: An Appraisal of Google Play Store Applications 电视医学:b谷歌Play Store应用评估
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0043-1761931
Hasan Mujtaba, Muhammad Farooq Umer, Eman Afroze, F. Chaudhary, Shumaila Zofeen, Awais Farid
Abstract Objectives  M-health technology facilitates and equips us with the required medical-related information and knowledge. This research work aims to provide an overview of m-health apps related to dentistry on the Google Play Store. Materials and Methods  This widely used official smartphone platform was screened for the most widely available apps by putting the Medical Subject Headings (MeSH) and keywords “teledentistry, dentistry, and dental” and the resultant apps were evaluated for the number of downloads, ratings, release date, and number of reviews. Results  The apps were categorized depending upon their applicability into different subgroups, which include patient education apps, dentist appointment apps, kid's apps, undergraduate apps, graduates and general dentist apps, postgraduate dentist apps, commercial and social networking apps, and other miscellaneous apps. The engagement of the users was evaluated in all the categories and the applicability of apps in respective categories was evaluated. The study concluded that despite plentiful apps in each category, the engagement of individuals with the m-health apps related to dentistry is relatively low. However, few creative apps in each category showed bright prospects for productivity and engagement. Conclusion  Centralization and appropriately supervised apps with quality information by some official health care platforms can enhance the effectiveness and prepare this platform for the future of dentistry in the world of semantic web and blockchain.
移动健康技术为我们提供了所需的医疗相关信息和知识。本研究工作旨在提供b谷歌Play Store上与牙科相关的移动健康应用程序的概述。材料和方法在这个被广泛使用的官方智能手机平台上,通过将医学主题标题(MeSH)和关键词“teledentistry, dentistry, and dental”筛选最广泛可用的应用程序,并评估由此产生的应用程序的下载次数、评级、发布日期和评论数量。结果根据应用的适用性,将这些应用分为不同的亚组,包括患者教育应用、牙医预约应用、儿童应用、本科生应用、毕业生和普通牙医应用、研究生牙医应用、商业和社交网络应用以及其他杂项应用。对所有类别的用户参与度进行了评估,并对应用程序在各自类别中的适用性进行了评估。该研究得出的结论是,尽管每个类别中都有大量的应用程序,但与牙科相关的移动医疗应用程序的个人参与度相对较低。然而,在每个类别中,几乎没有创意应用在生产力和用户粘性方面表现出光明的前景。结论一些官方医疗保健平台的应用程序集中管理,并对其进行适当的监督,提供高质量的信息,可以提高应用程序的有效性,为未来语义网和区块链世界的牙科平台做好准备。
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引用次数: 1
Effect of Horizontal Resolution of Printer on Trueness of 3D-Printed Provisional Crown: An In Vitro Study 打印机水平分辨率对3d打印临时冠真实性影响的体外研究
Q4 Dentistry Pub Date : 2023-01-01 DOI: 10.1055/s-0043-1764478
Pham Nhu Hai, T. M. Son, Nguyen Viet Anh, V. Ngoc, N. T. Tra
Abstract Objectives  Provisional crowns play an integral role in prosthodontic therapy and need to be fabricated with high accuracy to ensure good marginal fit and proper contour. The aim of this study is to evaluate the effect of 3D printer's horizontal pixel resolution on trueness of the intaglio surface, external surface, and marginal area and the actual marginal adaptation of the interim crowns. Materials and Methods  A gypsum reference model of mandible with a prepared right first molar was scanned with a dental laboratory scanner (AutoScan-DS-MIX, Shining 3D) and a digital provisional crown was design using the computer-aided design (CAD) software (Exocad). The provisional crown was manufactured by two printers with different horizontal resolutions (Sonic Mini 4K Printer and Sonic Mini 8K Printer). The printed crowns were scanned using the aforementioned scanner. The trueness of the external surface, internal surface, and marginal area of the provisional crowns was evaluated by comparing the scanned data with the reference CAD design data using a 3D inspection software (Geomagic Control X, 3D systems). The trueness of the crown manufactured by two printers was compared by a two-sided test ( α  = 0.05). Finally, the marginal adaptation of the provisional crowns was evaluated on the printed removable dies and compared. Results  The results revealed that there was a significant difference in the trueness of the marginal area and the marginal adaptation ( p  < 0.05). Conclusions  It can be concluded that the trueness of provisional crown marginal area and the marginal adaptation was affected by the horizontal resolution of the 3D printer.
抽象目标 临时牙冠在口腔修复治疗中起着不可或缺的作用,需要高精度制造,以确保良好的边缘配合和合适的轮廓。本研究的目的是评估3D打印机的水平像素分辨率对凹版表面、外表面和边缘区域的真实性以及过渡牙冠的实际边缘适应的影响。材料和方法 用牙科实验室扫描仪(AutoScan DS MIX,Shining 3D)扫描具有制备的右第一磨牙的下颌骨石膏参考模型,并使用计算机辅助设计(CAD)软件(Exocad)设计数字临时牙冠。临时牙冠由两台具有不同水平分辨率的打印机(Sonic Mini 4K打印机和Sonic Mini 8K打印机)制造。使用上述扫描仪对印刷的牙冠进行扫描。通过使用3D检查软件(Geomagic Control X,3D系统)将扫描数据与参考CAD设计数据进行比较,来评估临时牙冠的外表面、内表面和边缘区域的真实性。通过双面测试比较了两台打印机制造的牙冠的真实性(α = 0.05)。最后,在印刷的可移除模具上评估临时牙冠的边缘适应性并进行比较。后果 结果表明,边缘区域的真实性和边缘适应性存在显著差异(p < 0.05)。结论 可以得出结论,3D打印机的水平分辨率影响了临时牙冠边缘区域的真实性和边缘适应性。
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引用次数: 2
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European Journal of General Dentistry
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