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Differences in anxiety, depression, and oral health-related quality of life among dental anxiety patients with and without reported abuse experience 有和没有虐待经历的牙科焦虑症患者在焦虑、抑郁和口腔健康相关生活质量方面的差异
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2024-02-02 DOI: 10.1111/eos.12976
Vilde Aardal, Tiril Willumsen, Kjersti Berge Evensen

This study aimed to explore the differences in anxiety, depression, and oral health-related quality of life between people with dental anxiety who reported abuse experience (n = 60) and people with dental anxiety who did not report abuse experience (n = 97). Both groups attended a dental service focused on the treatment of dental anxiety intended for people with a history of physiological or psychological trauma, or odontophobia. The participants responded to a questionnaire that included the Hospital Anxiety and Depression Scale (HADS), Oral Impacts on Daily Performance (OIDP), and the Index of Dental Anxiety and Fear (IDAF-4C+). The differences between groups were tested for statistical significance using Welch's T-tests, and linear regression was used to adjust for gender. The participants with reported abuse experience expressed greater psychological symptoms of anxiety and poorer oral health-related quality of life. The participants with reported abuse experience also expressed a higher fear of losing control, as well as feeling shame and disgust. This study shows that individuals with dental anxiety and a history of abuse may face more complex challenges than those with dental anxiety and no history of abuse.

本研究旨在探讨有虐待经历的牙科焦虑症患者(60 人)与无虐待经历的牙科焦虑症患者(97 人)在焦虑、抑郁和口腔健康相关生活质量方面的差异。这两组人都参加了一项以治疗牙科焦虑症为重点的牙科服务,服务对象是有生理或心理创伤或牙科恐惧症病史的人。参与者回答了一份问卷,其中包括医院焦虑和抑郁量表(HADS)、口腔对日常表现的影响(OIDP)以及牙科焦虑和恐惧指数(IDAF-4C+)。使用韦尔奇 T 检验法检验了组间差异的统计学意义,并使用线性回归法对性别进行了调整。报告有虐待经历的参与者表现出更严重的焦虑心理症状,口腔健康相关的生活质量也更差。有虐待经历的参与者也更害怕失去控制,并感到羞耻和厌恶。这项研究表明,有牙科焦虑症和虐待史的人可能比没有虐待史但有牙科焦虑症的人面临更复杂的挑战。
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引用次数: 0
Reviewers 2023 2023 年审查员。
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2024-01-24 DOI: 10.1111/eos.12974
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引用次数: 0
Prisoners’ perceived oral and general health and their experience with accessing, understanding and assessing health information: A qualitative study 囚犯感知的口腔和一般健康状况,以及他们在获取、理解和评估健康信息方面的经验:定性研究。
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2024-01-20 DOI: 10.1111/eos.12972
Kathrine Høyvik Bergum, Vibeke Hervik Bull, Linda Maria Stein, Kjersti Berge Evensen

Prisoners’ oral health and general health are closely connected and generally poorer than that of the wider population. Moreover, knowledge of prisoners’ health literacy is scarce. This study aimed to explore prisoners’ perceived oral and general health and how they accessed, understood and assessed health information to gain insight into their health literacy. Twelve prisoners in a high-security prison and a halfway house participated in individual semi-structured interviews. Data was analysed through thematic analysis, which identified five themes: inconsistent self-reporting of general and oral health; autonomous health behaviour through utilizing personal resources; preference for personalized adapted health information; psychological and physical proximity; and barriers. The prisoners perceived their oral and general health as good despite several health problems. They expressed scepticism towards health information from public authorities and made their own health-related choices based on previous experiences, their own ‘common sense’ and the experiences of people they trusted. Health information was considered useful when adjusted to their needs. Obtaining health-related information through physical encounters was considered more accessible than through online platforms. Adapting the communication to prisoners’ expressed needs and their health literacy can enhance the accessibility to improve their oral and general health. In-person encounters would be preferable.

囚犯的口腔健康和一般健康状况密切相关,而且通常比更广泛人群的口腔健康状况更差。此外,有关囚犯健康素养的知识也很少。本研究旨在探讨囚犯对口腔和一般健康的看法,以及他们如何获取、理解和评估健康信息,从而深入了解他们的健康素养。一所高度戒备监狱和一所中途宿舍的 12 名囚犯参加了个人半结构式访谈。通过主题分析对数据进行了分析,确定了五个主题:对一般健康和口腔健康的自我报告不一致;通过利用个人资源实现自主健康行为;偏好个性化调整的健康信息;心理和生理接近;以及障碍。尽管存在一些健康问题,但囚犯们认为自己的口腔和一般健康状况良好。他们对公共机构提供的健康信息持怀疑态度,并根据以往的经验、自己的 "常识 "和他们信任的人的经验自行做出与健康有关的选择。他们认为,根据自己的需要调整健康信息是有用的。通过实际接触获取健康相关信息被认为比通过网络平台更容易获得。根据囚犯表达的需求和他们的健康知识水平调整信息交流,可以提高获取信息的便利性,从而改善他们的口腔健康和总体健康状况。最好是面对面交流。
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引用次数: 0
Stress analysis of horizontal mid-root fracture managed with different intraradicular fixation protocols: A 3D-finite element study 采用不同关节内固定方案处理的水平中根骨折的应力分析:三维有限元研究
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2024-01-18 DOI: 10.1111/eos.12971
Neha Jasrasaria, Saumya Johri, Ramesh Bharti, Aseem Prakash Tikku

The current study evaluated the stress distribution in a maxillary central incisor with mid-root fracture after splinting with different intra-radicular posts using 3D-finite element analysis (FEA). Five 3D-FEA models were constructed. Model 1 was an intact tooth with no fracture, Model 2: A tooth with a horizontal mid-root fracture, with no treatment. Model 3: Same as model 2, and intraradicular splinting using fiber post. Model 4: Same as model 2 and intra-radicular splinting using Protaper Gold file F3. Model 5: Same as model 2, and with intraradicular splinting with Ribbond. The FEA of all models was done to obtain the maximum Von-Mises stress in the root canal space, the dentin, the periodontal ligament, and the bone. The highest Von Mises stresses for the root canal space and the dentin were found in Model 3, followed by models 4, 5, and 2, and least in Model 1. The Von Mises stress of the periodontal ligament was the least in model 1. The Von Mises stress of bone was higher in all experimental models than in the baseline model. The results suggest that in cases where intra-radicular splinting is indicated, fiber posts and Ribbond are better alternatives to endodontic files due to the lower stresses exerted.

本研究使用三维有限元分析(FEA)评估了一颗中根骨折的上颌中切牙在使用不同的根内支柱夹板后的应力分布情况。共构建了五个三维有限元分析模型。模型 1 是一颗没有骨折的完整牙齿,模型 2:一颗牙根中段水平骨折的牙齿,没有进行任何治疗。模型 3:与模型 2 相同,使用纤维桩进行关节内夹板固定。模型 4:与模型 2 相同,使用 Protaper Gold F3 锉进行关节内夹板固定。模型 5:与模型 2 相同,使用 Ribbond 进行关节内夹板固定。对所有模型进行有限元分析,以获得根管间隙、牙本质、牙周韧带和牙槽骨的最大 Von Mises 应力。根管间隙和牙本质的 Von Mises 应力最大的是模型 3,其次是模型 4、5 和 2,模型 1 最小。牙周韧带的 Von Mises 应力在模型 1 中最小。所有实验模型中牙槽骨的 Von Mises 应力都高于基线模型。结果表明,在需要进行椎间夹板固定的情况下,纤维桩和 Ribbond 因其较低的应力而成为牙髓锉的更好替代品。
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引用次数: 0
Molecular mechanisms of saliva secretion and hyposecretion 唾液分泌和分泌不足的分子机制。
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2024-01-08 DOI: 10.1111/eos.12969
Eun-Ah Christine Song, Sul-Hee Chung, Jeong Hee Kim

The exocrine salivary gland secretes saliva, a fundamental body component to maintain oral homeostasis. Saliva is composed of water, ions, and proteins such as amylase, mucins, and immunoglobulins that play essential roles in the digestion of food, lubrication, and prevention of dental caries and periodontitis. An increasing number of people experience saliva hyposecretion due to aging, medications, Sjögren's syndrome, and radiation therapy for head and neck cancer. However, current treatments are mostly limited to temporary symptomatic relief. This review explores the molecular mechanisms underlying saliva secretion and hyposecretion to provide insight into putative therapeutic targets for treatment. Proteins implicated in saliva secretion pathways, including Ca2+-signaling proteins, aquaporins, soluble N-ethylmaleimide-sensitive factor attachment protein receptors, and tight junctions, are aberrantly expressed and localized in patients with saliva hyposecretion, such as Sjögren's syndrome. Analysis of studies on the mechanisms of saliva secretion and hyposecretion suggests that crosstalk between fluid and protein secretory pathways via Ca2+/protein kinase C and cAMP/protein kinase A regulates saliva secretion. Impaired crosstalk between the two secretory pathways may contribute to saliva hyposecretion. Future research into the detailed regulatory mechanisms of saliva secretion and hyposecretion may provide information to define novel targets and generate therapeutic strategies for saliva hyposecretion.

唾液腺分泌唾液,是维持口腔平衡的基本人体成分。唾液由水、离子和蛋白质(如淀粉酶、粘蛋白和免疫球蛋白)组成,在消化食物、润滑以及预防龋齿和牙周炎方面发挥着重要作用。越来越多的人由于衰老、药物、斯约格伦综合症以及头颈部癌症的放射治疗而导致唾液分泌不足。然而,目前的治疗方法大多仅限于暂时缓解症状。本综述探讨了唾液分泌和唾液分泌不足的分子机制,以便深入了解可能的治疗靶点。与唾液分泌途径有关的蛋白质,包括 Ca2+ 信号蛋白、水蒸发蛋白、可溶性 N-乙基马来酰亚胺敏感因子附着蛋白受体和紧密连接,在唾液分泌过少(如斯约格伦综合征)患者体内异常表达和定位。对唾液分泌和分泌过少机制的研究分析表明,液体和蛋白质分泌途径之间通过 Ca2+ / 蛋白激酶 C 和 cAMP / 蛋白激酶 A 的串联调节唾液分泌。两种分泌途径之间的串扰受损可能会导致唾液分泌过少。未来对唾液分泌和分泌过少的详细调控机制的研究可能会为确定唾液分泌过少的新靶点和制定治疗策略提供信息。
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引用次数: 0
Chemical analysis of n-propyl gallate used as pre-treatment for resin-dentin bond strength: In vitro study 用作树脂-牙本质粘接强度预处理的没食子酸正丙酯的化学分析:体外研究。
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2024-01-03 DOI: 10.1111/eos.12970
Talita Arrais Daniel Mendes, Samuel Chillavert Dias Pascoal, Maria Clara Ayres Estellita, Marcelo Victor Sidou Lemos, Sérgio Lima Santiago, Juliano Sartori Mendonça

This study aimed to evaluate the effect of n-propyl gallate as pre-treatment for resin-dentin bond strength. The dentin pre-treatments evaluated included propyl gallate of concentrations 0.1% (w/v), 1.0% (w/v), and 10.0% (w/v), as well as glutaraldehyde 5.0% (v/v), and distilled water as a control treatment. Dentin specimens were prepared for Fourier Transformed Infrared Spectroscopy (FT-IR) (n = 3/pre-treatment). Pre-treatments were actively applied to dentin blocks before performing the adhesive procedure to composite resin. Microtensile bond strength to dentin (μTBS) (n = 8/pre-treatment) was determined after 24 h and 6 months of storage. Data were submitted to a two-way ANOVA, followed by Tukey's post hoc test. As for FT-IR, propyl gallate 1%-treated specimens presented higher water, carbonate, collagen, and amide absorbance rates compared to other tested groups, while specimens pre-treated with glutaraldehyde and distilled water presented similar absorbance curves. Regarding μTBS, all concentrations of propyl gallate resulted in statistically significant higher bond strength values than distilled water at 24 h. After 6 months of storage, propyl gallate 0.1% was the only group that maintained μTBS over time. Propyl gallate 0.1% might be a suitable dentinal pre-treatment due to being able to present chemical bonds with demineralized dentin and providing resin-dentin bond stability after 6 months of storage.

本研究旨在评估没食子酸正丙酯作为预处理对树脂-牙本质粘接强度的影响。所评估的牙本质预处理包括浓度为 0.1%(w/v)、1.0%(w/v)和 10.0%(w/v)的没食子酸正丙酯、浓度为 5.0%(v/v)的戊二醛以及作为对照处理的蒸馏水。制备牙本质样本用于傅立叶变换红外光谱分析(FT-IR)(n = 3/预处理)。在对复合树脂进行粘接之前,先对牙本质块进行预处理。与牙本质的微拉伸粘接强度(μTBS)(n = 8/预处理)在存放 24 小时和 6 个月后测定。对数据进行双向方差分析,然后进行 Tukey 后检验。在傅立叶变换红外光谱方面,与其他测试组相比,经 1%没食子酸丙酯处理的试样具有更高的水、碳酸盐、胶原蛋白和酰胺吸光率,而经戊二醛和蒸馏水预处理的试样具有相似的吸光曲线。关于μTBS,在 24 小时内,所有浓度的没食子酸丙酯都比蒸馏水的粘接强度值高,这在统计学上具有显著意义。没食子酸丙酯 0.1% 可能是一种合适的牙本质预处理方法,因为它能与脱矿牙本质产生化学键,并在存放 6 个月后仍能提供树脂-牙本质粘接稳定性。
{"title":"Chemical analysis of n-propyl gallate used as pre-treatment for resin-dentin bond strength: In vitro study","authors":"Talita Arrais Daniel Mendes,&nbsp;Samuel Chillavert Dias Pascoal,&nbsp;Maria Clara Ayres Estellita,&nbsp;Marcelo Victor Sidou Lemos,&nbsp;Sérgio Lima Santiago,&nbsp;Juliano Sartori Mendonça","doi":"10.1111/eos.12970","DOIUrl":"10.1111/eos.12970","url":null,"abstract":"<p>This study aimed to evaluate the effect of n-propyl gallate as pre-treatment for resin-dentin bond strength. The dentin pre-treatments evaluated included propyl gallate of concentrations 0.1% (w/v), 1.0% (w/v), and 10.0% (w/v), as well as glutaraldehyde 5.0% (v/v), and distilled water as a control treatment. Dentin specimens were prepared for Fourier Transformed Infrared Spectroscopy (FT-IR) (<i>n</i> = 3/pre-treatment). Pre-treatments were actively applied to dentin blocks before performing the adhesive procedure to composite resin. Microtensile bond strength to dentin (μTBS) (<i>n</i> = 8/pre-treatment) was determined after 24 h and 6 months of storage. Data were submitted to a two-way ANOVA, followed by Tukey's post hoc test. As for FT-IR, propyl gallate 1%-treated specimens presented higher water, carbonate, collagen, and amide absorbance rates compared to other tested groups, while specimens pre-treated with glutaraldehyde and distilled water presented similar absorbance curves. Regarding μTBS, all concentrations of propyl gallate resulted in statistically significant higher bond strength values than distilled water at 24 h. After 6 months of storage, propyl gallate 0.1% was the only group that maintained μTBS over time. Propyl gallate 0.1% might be a suitable dentinal pre-treatment due to being able to present chemical bonds with demineralized dentin and providing resin-dentin bond stability after 6 months of storage.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139086387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","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 salivary α-amylase and immunoglobulin A responses after endurance exercise in adolescent males and females with similar aerobic fitness 评估耐力运动后唾液α-淀粉酶和免疫球蛋白A对有氧运动能力相似的青少年男性和女性的反应。
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2023-12-22 DOI: 10.1111/eos.12968
Nobuo Yasuda, Toshihiro Tanioka, Kimitaka Nakazawa

The objective of this study was to clarify whether there are sex-specific differences in salivary α-amylase and immunoglobulin A responses following acute endurance exercise in adolescent males and females with equivalent cardiorespiratory fitness levels. Twenty-six aerobically trained adolescent males and females with similar training status were enrolled in this study. Each individual executed a 1-h prolonged cycling exercise corresponding to a constant power output at 65% of peak oxygen uptake. Unstimulated whole salivary samples were taken with the passive drooling method at the 10-min period before and after exercise for the determination of salivary responses [α-amylase, immunoglobulin A, total protein and flow rate]. Salivary α-amylase activity, immunoglobulin A concentration and total protein concentration were significantly augmented immediately after acute endurance exercise. Regarding sex differences, only the salivary flow rate was significantly lower in females than in males. The findings of the present study imply that adolescent males and females appear to have similar salivary responses after acute endurance exercise, as represented by salivary α-amylase activity and immunoglobulin A concentration in connection with total protein concentration and salivary flow rate, when they are matched for peak oxygen uptake relative to fat-free body mass.

本研究的目的是要弄清心肺功能水平相当的青少年男性和女性在急性耐力运动后唾液α-淀粉酶和免疫球蛋白A的反应是否存在性别差异。本研究选取了 26 名接受过有氧运动训练且训练状况相似的青少年男性和女性作为研究对象。每个人都进行了 1 小时的长时间自行车运动,以 65% 的峰值摄氧量进行恒定功率输出。在运动前和运动后 10 分钟,采用被动流口水法采集未受刺激的全唾液样本,以测定唾液反应[α-淀粉酶、免疫球蛋白 A、总蛋白和流速]。急性耐力运动后,唾液中的α-淀粉酶活性、免疫球蛋白A浓度和总蛋白浓度立即显著增加。在性别差异方面,只有女性的唾液流速明显低于男性。本研究的结果表明,青少年男性和女性在急性耐力运动后似乎有相似的唾液反应,表现为唾液α-淀粉酶活性和免疫球蛋白A浓度与总蛋白浓度和唾液流速的关系,当他们的峰值摄氧量与去脂体重相匹配时,唾液α-淀粉酶活性和免疫球蛋白A浓度与总蛋白浓度和唾液流速的关系也相似。
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引用次数: 0
Effects of alpha-tocopherol antioxidant on fracture strength and adhesion of endodontically treated teeth restored after dental bleaching α-生育酚抗氧化剂对牙髓治疗后牙齿漂白修复后的断裂强度和附着力的影响。
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2023-12-20 DOI: 10.1111/eos.12965
Natália Marcomini, Maria Carolina da Costa Albaricci, Joatan Lucas de Sousa Gomes Costa, João Felipe Besegato, Eduardo Fernández Godoy, Andréa Abi Rached Dantas, Milton Carlos Kuga

This study evaluated the effect of different concentrations of alpha-tocopherol in gel form on fracture strength, hybrid layer formation, and microtensile bond strength of endodontically treated teeth bleached with 40% hydrogen peroxide (H2O2). Sixty bovine incisors were randomized into one of six groups (n = 10 incisors per group) defined by the interventions carried out after endodontic treatment. In the control group, no additional intervention was carried out, while all teeth in the five intervention groups were bleached with 40% H2O2 and subsequently treated with alpha-tocopherol at concentrations of 15% (15AT), 20% (20AT), or 25% (25AT), with 10% sodium ascorbate (10SA), or with nothing (40HP). Fracture strength was evaluated in a mechanical testing machine, hybrid layer formation was assessed using scanning electron microscopy, and bond strength was determined using microtensile bond-strength testing. Data were analyzed using Kruskal–Wallis and Dunn's tests. No statistically significant difference regarding fracture strength was observed among groups. Hybrid layer formation was greater in the 15AT group than in groups 40HP and 10SA. Teeth in groups 15AT, 20AT, and 25AT demonstrated higher bond strength than teeth in groups 40HP and 10SA. Alpha-tocopherol, preferably at 15%, effectively reverses the deleterious effects, of bleaching, on hybrid layer formation and bond strength to dentin.

本研究评估了不同浓度的凝胶状α-生育酚对使用 40% 过氧化氢(H2 O2)漂白的牙髓治疗牙齿的断裂强度、杂交层形成和微张力粘接强度的影响。根据牙髓治疗后所采取的干预措施,将 60 颗牛门牙随机分为六组(每组 10 颗门牙)。对照组不进行额外干预,而五个干预组中的所有牙齿都用 40% 的 H2 O2 漂白,然后用浓度为 15% (15AT)、20% (20AT) 或 25% (25AT) 的α-生育酚、10% 抗坏血酸钠 (10SA) 或不加任何物质 (40HP) 进行处理。断裂强度在机械试验机中进行评估,杂化层的形成用扫描电子显微镜进行评估,粘接强度用微拉伸粘接强度测试进行测定。数据采用 Kruskal-Wallis 和 Dunn 检验进行分析。各组在断裂强度方面没有发现明显的统计学差异。与 40HP 和 10SA 组相比,15AT 组的混合层形成更多。15AT、20AT 和 25AT 组的牙齿粘接强度高于 40HP 和 10SA 组。α-生育酚(最好含量为 15%)能有效逆转漂白对杂化层形成和牙本质粘接强度的有害影响。
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引用次数: 0
Effects of erosion and abrasion on resin-matrix ceramic CAD/CAM materials: An in vitro investigation 侵蚀和磨损对树脂基质陶瓷 CAD/CAM 材料的影响:体外研究
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2023-12-17 DOI: 10.1111/eos.12967
Cosima Reidelbach, Michael Swoboda, Mathias Spraul, Kirstin Vach, Sebastian B. M. Patzelt, Elmar Hellwig, Olga Polydorou

The aim of the study was to evaluate the effects of erosion and abrasion on resin-matrix ceramic CAD/CAM materials [CERASMART (GC); VITA ENAMIC (VITA Zahnfabrik); Lava Ultimate (3 M)] in comparison to feldspar ceramic (VITABLOCS Mark II, VITA Zahnfabrik) and resin composite materials (ceram.x universal, Dentsply Sirona). Daily brushing and acid exposure were simulated using a brushing apparatus and a solution of 0.5 vol% citric acid. Microhardness, surface roughness, and substance loss were measured at baseline and after simulation of 1 and 3 years of function. All materials showed a decrease in microhardness after 3 years and an increase in surface roughness (Ra) after 1 and 3 years. The Ra increase was statistically significantly lower for the resin-matrix ceramics than for feldspar ceramic and similar to composite material. After 3 years, only feldspar ceramic showed no significant substance loss. In conclusion, resin-matrix ceramics demonstrate reduced roughening compared to feldspar ceramics, potentially improving restoration longevity by preventing plaque buildup, but differences in abrasion resistance suggest the need for further material-specific research. Future research should aim to replicate clinical conditions closely and to transition to in vivo trials.

该研究旨在评估树脂基质陶瓷 CAD/CAM 材料 [CERASMART (GC);VITA ENAMIC (VITA Zahnfabrik);Lava Ultimate (3 M)]与长石陶瓷(VITABLOCS Mark II,VITA Zahnfabrik)和树脂复合材料(ceram.x universal,Dentsply Sirona)相比,受到侵蚀和磨损的影响。使用刷牙器和 0.5 Vol% 的柠檬酸溶液模拟日常刷牙和酸暴露。在基线和模拟 1 年和 3 年的功能后,对微观硬度、表面粗糙度和物质流失进行了测量。所有材料的显微硬度在 3 年后都有所下降,表面粗糙度(Ra)在 1 年和 3 年后都有所上升。据统计,树脂基质陶瓷的 Ra 增幅明显低于长石陶瓷,与复合材料相似。3 年后,只有长石陶瓷没有出现明显的物质损失。总之,与长石陶瓷相比,树脂基质陶瓷的粗糙度较低,可以通过防止牙菌斑堆积来延长修复体的寿命,但耐磨性方面的差异表明需要进一步开展针对特定材料的研究。未来的研究应以密切复制临床条件为目标,并过渡到体内试验。
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引用次数: 0
Optical effects of graphene addition on adhesives for orthodontic lingual retainers 添加石墨烯对正畸舌侧保持器粘合剂的光学效应
IF 1.9 4区 医学 Q2 Dentistry Pub Date : 2023-12-07 DOI: 10.1111/eos.12966
Shiyao Liu, Ahmed El-Angbawi, Ruidong Ji, Vinicius Rosa, Nick Silikas

The objective of this study was to determine the effects on the colour of adding increasing concentrations of graphene to orthodontic fixed retainer adhesives and to evaluate changes in optical transmission during light curing and the resultant degree of conversion. Two different types of adhesives commonly used for fixed retainers were investigated: A packable composite (Transbond) and a flowable composite (Transbond Supreme). Graphene was added to the adhesives in three different concentrations (0.01, 0.05, and 0.1 wt%). Adhesives without graphene addition were set as control groups. A Minolta colourimeter was used to measure the colour and translucency parameters. Irradiance transmitted during curing was quantified using MARC Light Collector. Fourier-transform infrared spectroscopy was used to record degree of conversion. Data were statistically analysed with the Student's t-test and one-way ANOVA with Tukey's tests (α = 0.05). The findings showed that incorporating graphene darkened the adhesive colour significantly and reduced translucency. As the graphene concentration reached 0.1 wt%, samples became opaque; yet, no adverse effect on degree of conversion was observed. The addition of graphene reduces optical transmission of lingual retainer adhesives; the effect increases with graphene concentration.

本研究的目的是确定在正畸固定保持器粘合剂中添加浓度不断增加的石墨烯对颜色的影响,并评估光固化过程中光学透射率的变化以及由此产生的转换程度。研究了固定保持器常用的两种不同类型的粘合剂:一种可包装复合材料(Transbond)和一种可流动复合材料(Transbond Supreme)。粘合剂中添加了三种不同浓度的石墨烯(0.01、0.05 和 0.1 wt%)。未添加石墨烯的粘合剂设为对照组。使用美能达色度计测量颜色和半透明参数。使用 MARC 光收集器对固化过程中透射的辐照度进行量化。傅立叶变换红外光谱法用于记录转化程度。数据的统计分析采用了学生 t 检验和单向方差分析,并进行了 Tukey 检验(α = 0.05)。研究结果表明,加入石墨烯后,粘合剂的颜色明显变深,半透明性降低。当石墨烯浓度达到 0.1 wt% 时,样品变得不透明;然而,并未观察到对转化率的不利影响。石墨烯的加入降低了舌侧固位粘合剂的光学透射率;这种影响随石墨烯浓度的增加而增大。
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引用次数: 0
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European Journal of Oral Sciences
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