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。
{"title":"Differences in anxiety, depression, and oral health-related quality of life among dental anxiety patients with and without reported abuse experience","authors":"Vilde Aardal, Tiril Willumsen, Kjersti Berge Evensen","doi":"10.1111/eos.12976","DOIUrl":"10.1111/eos.12976","url":null,"abstract":"<p>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 (<i>n</i> = 60) and people with dental anxiety who did not report abuse experience (<i>n</i> = 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<sup>+</sup>). The differences between groups were tested for statistical significance using Welch's <i>T</i>-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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eos.12976","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139665137","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}
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.
{"title":"Prisoners’ perceived oral and general health and their experience with accessing, understanding and assessing health information: A qualitative study","authors":"Kathrine Høyvik Bergum, Vibeke Hervik Bull, Linda Maria Stein, Kjersti Berge Evensen","doi":"10.1111/eos.12972","DOIUrl":"10.1111/eos.12972","url":null,"abstract":"<p>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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eos.12972","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139502068","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}
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.
{"title":"Stress analysis of horizontal mid-root fracture managed with different intraradicular fixation protocols: A 3D-finite element study","authors":"Neha Jasrasaria, Saumya Johri, Ramesh Bharti, Aseem Prakash Tikku","doi":"10.1111/eos.12971","DOIUrl":"10.1111/eos.12971","url":null,"abstract":"<p>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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139484947","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}
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。
{"title":"Molecular mechanisms of saliva secretion and hyposecretion","authors":"Eun-Ah Christine Song, Sul-Hee Chung, Jeong Hee Kim","doi":"10.1111/eos.12969","DOIUrl":"10.1111/eos.12969","url":null,"abstract":"<p>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 Ca<sup>2+</sup>-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 Ca<sup>2+</sup>/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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139402467","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}
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.
{"title":"Chemical analysis of n-propyl gallate used as pre-treatment for resin-dentin bond strength: In vitro study","authors":"Talita Arrais Daniel Mendes, Samuel Chillavert Dias Pascoal, Maria Clara Ayres Estellita, Marcelo Victor Sidou Lemos, Sérgio Lima Santiago, 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}
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.
{"title":"Evaluation of salivary α-amylase and immunoglobulin A responses after endurance exercise in adolescent males and females with similar aerobic fitness","authors":"Nobuo Yasuda, Toshihiro Tanioka, Kimitaka Nakazawa","doi":"10.1111/eos.12968","DOIUrl":"10.1111/eos.12968","url":null,"abstract":"<p>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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eos.12968","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138884752","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}
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.
{"title":"Effects of alpha-tocopherol antioxidant on fracture strength and adhesion of endodontically treated teeth restored after dental bleaching","authors":"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","doi":"10.1111/eos.12965","DOIUrl":"10.1111/eos.12965","url":null,"abstract":"<p>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 (H<sub>2</sub>O<sub>2</sub>). Sixty bovine incisors were randomized into one of six groups (<i>n</i> = 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% H<sub>2</sub>O<sub>2</sub> 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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138799549","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}
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.
{"title":"Effects of erosion and abrasion on resin-matrix ceramic CAD/CAM materials: An in vitro investigation","authors":"Cosima Reidelbach, Michael Swoboda, Mathias Spraul, Kirstin Vach, Sebastian B. M. Patzelt, Elmar Hellwig, Olga Polydorou","doi":"10.1111/eos.12967","DOIUrl":"10.1111/eos.12967","url":null,"abstract":"<p>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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eos.12967","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138717596","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}
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。
{"title":"Optical effects of graphene addition on adhesives for orthodontic lingual retainers","authors":"Shiyao Liu, Ahmed El-Angbawi, Ruidong Ji, Vinicius Rosa, Nick Silikas","doi":"10.1111/eos.12966","DOIUrl":"10.1111/eos.12966","url":null,"abstract":"<p>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 <i>t</i>-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.</p>","PeriodicalId":11983,"journal":{"name":"European Journal of Oral Sciences","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/eos.12966","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138560568","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}