Pub Date : 2024-02-01Epub Date: 2022-05-19DOI: 10.1037/tra0001262
Anni Wang, Yufang Guo, Wendy Cross, Louisa Lam, Virginia Plummer, Wen Zhang, Jingping Zhang
[Correction Notice: An Erratum for this article was reported online in Psychological Trauma: Theory, Research, Practice, and Policy on Aug 11 2022 (see record 2022-88678-001). In the original article, the fourth affiliation was incorrectly listed as "Sau Po Centre on Ageing, The University of Hong Kong" and has been changed to "Department of Social Work and Social Administration, The University of Hong Kong." All versions of this article have been corrected.] Objective: Parents who lose an only child in China are stressed and traumatized due to social identity threat (SIT). This qualitative study aimed to interpret their experience to inform culturally and socially sensitive intervention strategies.
Methods: Using a phenomenological approach, 17 bereaved parents who lost an only child were interviewed. The transcripts were analyzed using Colaizzi's method.
Results: Three themes were identified, namely, "assuming a new social identity," "triggering social identity threat," and "resisting social identity threat and maintaining resilience." The study showed that SIT initially began with identity reconstruction, where self-identity and social identity occurred 1 after another. Once labeled with such social identity, the bereaved parents suffered social identity threat triggered by inner inferiority and external stigmatization. The bereaved parents undertook a variety of coping strategies to resist the threat and to maintain resilience; of these strategies, 4 patterns depicting resilience and threat were interpreted.
Conclusion: The findings offer an understanding of the multifaceted bereavement dilemma and lay a foundation for developing intervention strategies. Promoting or maintaining resilience and alleviating SIT are 2 important ways that help parents move on. To help them with identity reconstruction, the development of culturally sensitive resilience-based programs and the linking of social resources to solve practical problems are recommended. Community health professionals should encourage parents to maintain good health management to prevent their predicament from worsening. Raising economic assistance, building an elderly care support system, and promoting social acceptance are strategies that could be considered by policymakers. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
[更正通知：本文的勘误已于 2022 年 8 月 11 日在《心理创伤》（Psychological Trauma：Theory，Research，Practice，and Policy》（见2022-88678-001记录）。在原文中，第四个单位错误地列为 "香港大学秀圃老龄化研究中心"，现已改为 "香港大学社会工作及社会行政学系"。本文所有版本均已更正]。目的：在中国，失去独生子女的父母会因社会身份威胁（SIT）而感到压力和创伤。这项定性研究旨在解读他们的经历，为文化和社会敏感性干预策略提供依据：采用现象学方法，对 17 位失去独生子女的父母进行了访谈。方法：采用现象学方法对 17 位失去独生子女的丧亲父母进行了访谈，并使用科莱兹方法对访谈记录进行了分析：结果：确定了三个主题，即 "承担新的社会身份"、"引发社会身份威胁 "和 "抵御社会身份威胁并保持复原力"。研究表明，SIT 最初始于身份重建，自我身份和社会身份相继出现。一旦被贴上这样的社会身份标签，丧亲父母就会遭受由内心自卑和外部鄙视引发的社会身份威胁。丧亲父母采取了各种应对策略来抵御威胁和保持复原力；在这些策略中，有 4 种模式描述了复原力和威胁：研究结果使我们了解了丧亲之痛的多方面困境，并为制定干预策略奠定了基础。促进或维持抗逆力和减轻 SIT 是帮助父母继续生活的两个重要方法。为帮助他们重塑身份，建议开发基于文化敏感性的复原力计划，并链接社会资源以解决实际问题。社区卫生专业人员应鼓励家长保持良好的健康管理，防止困境恶化。提高经济援助、建立老年人护理支持系统、促进社会接纳，这些都是政策制定者可以考虑的策略。(PsycInfo Database Record (c) 2024 APA, all rights reserved)。
{"title":"\"Resisting social identity threat and maintaining resilience\": A qualitative study of Chinese parents following the loss of an only child.","authors":"Anni Wang, Yufang Guo, Wendy Cross, Louisa Lam, Virginia Plummer, Wen Zhang, Jingping Zhang","doi":"10.1037/tra0001262","DOIUrl":"10.1037/tra0001262","url":null,"abstract":"<p><p>[Correction Notice: An Erratum for this article was reported online in <i>Psychological Trauma: Theory, Research, Practice, and Policy</i> on Aug 11 2022 (see record 2022-88678-001). In the original article, the fourth affiliation was incorrectly listed as \"Sau Po Centre on Ageing, The University of Hong Kong\" and has been changed to \"Department of Social Work and Social Administration, The University of Hong Kong.\" All versions of this article have been corrected.] Objective: Parents who lose an only child in China are stressed and traumatized due to social identity threat (SIT). This qualitative study aimed to interpret their experience to inform culturally and socially sensitive intervention strategies.</p><p><strong>Methods: </strong>Using a phenomenological approach, 17 bereaved parents who lost an only child were interviewed. The transcripts were analyzed using Colaizzi's method.</p><p><strong>Results: </strong>Three themes were identified, namely, \"assuming a new social identity,\" \"triggering social identity threat,\" and \"resisting social identity threat and maintaining resilience.\" The study showed that SIT initially began with identity reconstruction, where self-identity and social identity occurred 1 after another. Once labeled with such social identity, the bereaved parents suffered social identity threat triggered by inner inferiority and external stigmatization. The bereaved parents undertook a variety of coping strategies to resist the threat and to maintain resilience; of these strategies, 4 patterns depicting resilience and threat were interpreted.</p><p><strong>Conclusion: </strong>The findings offer an understanding of the multifaceted bereavement dilemma and lay a foundation for developing intervention strategies. Promoting or maintaining resilience and alleviating SIT are 2 important ways that help parents move on. To help them with identity reconstruction, the development of culturally sensitive resilience-based programs and the linking of social resources to solve practical problems are recommended. Community health professionals should encourage parents to maintain good health management to prevent their predicament from worsening. Raising economic assistance, building an elderly care support system, and promoting social acceptance are strategies that could be considered by policymakers. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"167-175"},"PeriodicalIF":2.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89773592","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400008
M. Alves-Rezende, F. Lorenzato
Impressions carried out in the dental office are potential contamination pathways. The aim of this paper was to evaluate the effects of spray disinfection on the wetting of polyether material (Impregum F) by stones. Three kinds of stones (Herostone, Durone and Polirock) and two disinfectant solutions (2% glutaraldehyde and 1% hypochlorite) were used. The impressions were submitted to spray disinfection, and the contact angles between them and their respective casts were measured. The smaller the angle, the better the adaptation of the stone to the polyether material. No adverse effects were observed with the two disinfectant solutions. Durone presented the best results.
{"title":"Efeito da desinfeccao por aerossois sobre a capacidade de umedecimento de moldes de polieter por gesso tipo IV","authors":"M. Alves-Rezende, F. Lorenzato","doi":"10.1590/S0103-06631999000400008","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400008","url":null,"abstract":"Impressions carried out in the dental office are potential contamination pathways. The aim of this paper was to evaluate the effects of spray disinfection on the wetting of polyether material (Impregum F) by stones. Three kinds of stones (Herostone, Durone and Polirock) and two disinfectant solutions (2% glutaraldehyde and 1% hypochlorite) were used. The impressions were submitted to spray disinfection, and the contact angles between them and their respective casts were measured. The smaller the angle, the better the adaptation of the stone to the polyether material. No adverse effects were observed with the two disinfectant solutions. Durone presented the best results.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"363-367"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0103-06631999000400008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654656","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400006
Luciana Silva Andrade Tarozzo, M. C. T. D. Mattos, Ricardo Faria Ribeiro, Osvaldo Luiz Bezzon, M. Semprini
The objective of the present investigation was to evaluate the resistance of metal-resin bonding using the Silicoater® MD system (Kulzer), five types of retention in the metal structure, and three commercial Ni-Cr alloys: Duceranium U, Wiron 99 and Wirocer. A total of 90 samples were submitted to the shearing test. Statistical analysis of the results permitted us to conclude that retention versus alloy interaction was statistically significant at a 1% level of probability, the highest mean value being obtained with the Wirocer alloy with mechanical retention with 0.6 mm spheres. The lowest mean values were observed with the Wiron 99 alloy with chemical retention.
{"title":"Avaliação da resistência da união metal-resina usando sistemas de retenção mecânico e químico","authors":"Luciana Silva Andrade Tarozzo, M. C. T. D. Mattos, Ricardo Faria Ribeiro, Osvaldo Luiz Bezzon, M. Semprini","doi":"10.1590/S0103-06631999000400006","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400006","url":null,"abstract":"The objective of the present investigation was to evaluate the resistance of metal-resin bonding using the Silicoater® MD system (Kulzer), five types of retention in the metal structure, and three commercial Ni-Cr alloys: Duceranium U, Wiron 99 and Wirocer. A total of 90 samples were submitted to the shearing test. Statistical analysis of the results permitted us to conclude that retention versus alloy interaction was statistically significant at a 1% level of probability, the highest mean value being obtained with the Wirocer alloy with mechanical retention with 0.6 mm spheres. The lowest mean values were observed with the Wiron 99 alloy with chemical retention.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"349-355"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654996","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400004
Margareth Oda, A. B. Matos, E. A. Liberti
The constant recurrence of indicated treatments for dentine hypersensitivity has motivated many studies on the subject, in the search for good long-term clinical results. The aim of this in vitro study was to evaluate, by SEM, the formation of an impermeable film when desensitizing substances are applied after acid etching of the dentine surface. Dentine discs with a standardized smear layer were acid etched with 35% phosphoric acid and substances based on glutaraldehyde, oxalate and sodium fluoride were applied according to manufacturers instructions. Discs without treatment were used as the control group and only one of them was acid etched. Morphological results showed that acid etching of the dentine surface prior to the application of substances based on glutaraldehyde and oxalate are not able to form a uniform, impermeable film over dentine. On the other hand, sodium fluoride containing substances can form a layer over dentine, but it is easily removable, probably with no long-term effect.
{"title":"Morfologia da dentina tratada com substâncias dessensibilizantes: avaliação através da microscopia eletrônica de varredura","authors":"Margareth Oda, A. B. Matos, E. A. Liberti","doi":"10.1590/S0103-06631999000400004","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400004","url":null,"abstract":"The constant recurrence of indicated treatments for dentine hypersensitivity has motivated many studies on the subject, in the search for good long-term clinical results. The aim of this in vitro study was to evaluate, by SEM, the formation of an impermeable film when desensitizing substances are applied after acid etching of the dentine surface. Dentine discs with a standardized smear layer were acid etched with 35% phosphoric acid and substances based on glutaraldehyde, oxalate and sodium fluoride were applied according to manufacturers instructions. Discs without treatment were used as the control group and only one of them was acid etched. Morphological results showed that acid etching of the dentine surface prior to the application of substances based on glutaraldehyde and oxalate are not able to form a uniform, impermeable film over dentine. On the other hand, sodium fluoride containing substances can form a layer over dentine, but it is easily removable, probably with no long-term effect.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"337-342"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0103-06631999000400004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67655023","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400012
C. Costa, Marcelo Bidóia dos Santos, Antônio Carlos Bombana
The authors evaluated, in simulated curved canals, the distortion caused by the use of two rotary systems, the Quantec and the RBS. Twenty epoxy resin simulated root canals were obtained through silver cones #15 with 21 mm and 30 degree curves, checked by a profile projector, according to Schneider "modified" technique, and divided in two groups. They were covered with black adhesive band and instrumented, with the respective rotary systems, according to the manufacturers directions, up to size 35 at the apex. After instrumentation, the blocks were uncovered and the angle of each prepared canal was measured again, thus revealing the curvature distortion of the canals through a percental distortion index. The results showed that for the Quantec system the percental average distortion was 8.14%, while that for the RBS was 12.48%, difference statistically significant at the level of 1% (a = 0.01%).
{"title":"Avaliação da distorção da curvatura em canais simulados, instrumentados por dois sistemas rotatórios: Quantec Series 2000TM e RBSTM Moyco Union Broach","authors":"C. Costa, Marcelo Bidóia dos Santos, Antônio Carlos Bombana","doi":"10.1590/S0103-06631999000400012","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400012","url":null,"abstract":"The authors evaluated, in simulated curved canals, the distortion caused by the use of two rotary systems, the Quantec and the RBS. Twenty epoxy resin simulated root canals were obtained through silver cones #15 with 21 mm and 30 degree curves, checked by a profile projector, according to Schneider \"modified\" technique, and divided in two groups. They were covered with black adhesive band and instrumented, with the respective rotary systems, according to the manufacturers directions, up to size 35 at the apex. After instrumentation, the blocks were uncovered and the angle of each prepared canal was measured again, thus revealing the curvature distortion of the canals through a percental distortion index. The results showed that for the Quantec system the percental average distortion was 8.14%, while that for the RBS was 12.48%, difference statistically significant at the level of 1% (a = 0.01%).","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"391-394"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67655534","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400002
A. R. Vieira, I. Souza, A. Modesto
We evaluated the surface of composite resins and glass-ionomer cements in a situation of high cariogenic challenge. Based on seventy-five standard test specimens of one glass-ionomer cement (Chelon Fil - ESPE), one resin-modified glass-ionomer (Vitremer - 3M), two polyacid-modified composite (VariGlass and Dyract - Dentsply) and one composite resin (Heliomolar - Vivadent), submitted to fourteen days of demineralization and remineralization cycling to simulate a high cariogenic challenge, the erosive aspects of the surface of the materials were assessed. All of the samples were evaluated by scanning electronic microscope and compared with another five test specimens of each material, prepared in the same way and serving as control. All of the materials studied suffered erosive action by the media, with different characteristics due to the different compositions, after being submitted to in vitro simulation of a high cariogenic challenge.
{"title":"Study of surface alterations of composite and ionomeric materials submitted to simulation of a high cariogenic challenge","authors":"A. R. Vieira, I. Souza, A. Modesto","doi":"10.1590/S0103-06631999000400002","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400002","url":null,"abstract":"We evaluated the surface of composite resins and glass-ionomer cements in a situation of high cariogenic challenge. Based on seventy-five standard test specimens of one glass-ionomer cement (Chelon Fil - ESPE), one resin-modified glass-ionomer (Vitremer - 3M), two polyacid-modified composite (VariGlass and Dyract - Dentsply) and one composite resin (Heliomolar - Vivadent), submitted to fourteen days of demineralization and remineralization cycling to simulate a high cariogenic challenge, the erosive aspects of the surface of the materials were assessed. All of the samples were evaluated by scanning electronic microscope and compared with another five test specimens of each material, prepared in the same way and serving as control. All of the materials studied suffered erosive action by the media, with different characteristics due to the different compositions, after being submitted to in vitro simulation of a high cariogenic challenge.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"321-327"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0103-06631999000400002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654373","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400007
T. N. Campos, Matsuyoshi Mori, Alberto Tsutomu Henmi, Tetsuo Saito
One of the main goals of the luting agent, which bonds the cast restoration to the prepared tooth, is to seal the gap between them. Standardized preparations were made on 20 extracted teeth in order to evaluate microleakage. The crowns were made in NiCr, and in one group of 10 crowns zinc phosphate was used as the luting agent; in the other 10, Panavia 21 was used. The samples were thermocycled and then put into methylene blue solution (0.5%). After buccolingual sectioning of the cemented crowns, the samples were examined with a magnifier. There was a significant difference between the two groups: 100% of the zinc phosphate cemented crowns presented microleakage reaching the dentin and the pulp and 100% of the samples with Panavia 21 did not suffer any microleakage. So, as to the marginal microleakage with cast metal crowns in NiCr, the Panavia 21 luting agent presented better results than did zinc phosphate.
{"title":"Infiltração marginal de agentes cimentantes em coroas metálicas fundidas","authors":"T. N. Campos, Matsuyoshi Mori, Alberto Tsutomu Henmi, Tetsuo Saito","doi":"10.1590/S0103-06631999000400007","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400007","url":null,"abstract":"One of the main goals of the luting agent, which bonds the cast restoration to the prepared tooth, is to seal the gap between them. Standardized preparations were made on 20 extracted teeth in order to evaluate microleakage. The crowns were made in NiCr, and in one group of 10 crowns zinc phosphate was used as the luting agent; in the other 10, Panavia 21 was used. The samples were thermocycled and then put into methylene blue solution (0.5%). After buccolingual sectioning of the cemented crowns, the samples were examined with a magnifier. There was a significant difference between the two groups: 100% of the zinc phosphate cemented crowns presented microleakage reaching the dentin and the pulp and 100% of the samples with Panavia 21 did not suffer any microleakage. So, as to the marginal microleakage with cast metal crowns in NiCr, the Panavia 21 luting agent presented better results than did zinc phosphate.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"357-362"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0103-06631999000400007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654607","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400003
E. Franco, A. M. Botelho
The purpose of this study was to evaluate the tensile strength of metal crowns cemented with Ketac-Cem (ESPE) glass ionomer cement, on teeth properly prepared with and without previous treatment of 40% polyacrylic acid, as well as on built-up teeth reconstructed with Vitremer (3M) ionomer cement. For comparison purposes, zinc phosphate cement (SS White) was also employed. Fifty upper pre-molar human teeth were selected, embedded in epoxy resin, and divided into 5 groups of 10 elements each. After cementing, the specimens were submitted to thermocycling at 5°C, 37°C and 55°C, and later subjected to tensile tests in a Universal Kratos testing machine. The results obtained were submitted to ANOVA, showing statistically significant differences (5%) between the distinct conditions studied. Regarding the teeth without reconstruction, we verified improved results of Ketac-Cem when using polyacrylic acid. The teeth reconstructed with Vitremer did not show significant statistical difference between the two cementing agents. The reconstruction of teeth buildup surfaces did not hinder the retentiveness of the metal crowns.
{"title":"Resistência à remoção por tração de coroas totais metálicas cimentadas em dentes com e sem reconstrução coronária","authors":"E. Franco, A. M. Botelho","doi":"10.1590/S0103-06631999000400003","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400003","url":null,"abstract":"The purpose of this study was to evaluate the tensile strength of metal crowns cemented with Ketac-Cem (ESPE) glass ionomer cement, on teeth properly prepared with and without previous treatment of 40% polyacrylic acid, as well as on built-up teeth reconstructed with Vitremer (3M) ionomer cement. For comparison purposes, zinc phosphate cement (SS White) was also employed. Fifty upper pre-molar human teeth were selected, embedded in epoxy resin, and divided into 5 groups of 10 elements each. After cementing, the specimens were submitted to thermocycling at 5°C, 37°C and 55°C, and later subjected to tensile tests in a Universal Kratos testing machine. The results obtained were submitted to ANOVA, showing statistically significant differences (5%) between the distinct conditions studied. Regarding the teeth without reconstruction, we verified improved results of Ketac-Cem when using polyacrylic acid. The teeth reconstructed with Vitremer did not show significant statistical difference between the two cementing agents. The reconstruction of teeth buildup surfaces did not hinder the retentiveness of the metal crowns.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"329-335"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654906","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}
Pub Date : 1999-12-01DOI: 10.1590/S0103-06631999000400009
S. K. Bussadori, A. Muench
The purpose of this research was to evaluate microleakage on proximal restorations of primary teeth, using four materials (Dyract, Vitremer, Z100 and Fuji II LC). Acid etching was performed in only one group. Proximal cavities were prepared with the following measures (mm): height, 4; width, 3; depth, 2. Restoring was performed according to manufacturers instructions, and specimens were stored in distilled water for seven days, at 37oC. Afterwards, thermal cycling was performed (700 cycles at 5 and 55oC, for one minute in each temperature). Specimens were then immersed in 0.5% methylene blue solution, and prepared for evaluation. The results led to the following conclusions: there were great differences of scores between materials, 0.1 (Dyract) and 4.0 (Fuji II LC); Vitremer and Z100 presented similar values (respectively, in scores, 1.7 and 1.6); Fuji II LC presented the largest microleakage, which decreased with the acid etching.
本研究采用四种材料(Dyract、Vitremer、Z100和Fuji II LC)对乳牙近端修复体的微渗漏进行评价。仅一组进行酸蚀。近端空腔采用以下测量(mm):高度，4;宽度,3;深度,2。按照制造商的说明进行修复，标本在37℃的蒸馏水中保存7天。然后进行热循环(在5℃和55℃下循环700次，每种温度各1分钟)。然后将标本浸入0.5%亚甲基蓝溶液中，准备评估。结果表明:材料间的评分差异较大，分别为0.1 (Dyract)和4.0 (Fuji II LC);Vitremer和Z100的得分相近(分别为1.7分和1.6分);富士II型LC微漏最大，随酸蚀而减小。
{"title":"Microinfiltração em dentes decíduos em função de materiais restauradores e condicionamento ácido","authors":"S. K. Bussadori, A. Muench","doi":"10.1590/S0103-06631999000400009","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400009","url":null,"abstract":"The purpose of this research was to evaluate microleakage on proximal restorations of primary teeth, using four materials (Dyract, Vitremer, Z100 and Fuji II LC). Acid etching was performed in only one group. Proximal cavities were prepared with the following measures (mm): height, 4; width, 3; depth, 2. Restoring was performed according to manufacturers instructions, and specimens were stored in distilled water for seven days, at 37oC. Afterwards, thermal cycling was performed (700 cycles at 5 and 55oC, for one minute in each temperature). Specimens were then immersed in 0.5% methylene blue solution, and prepared for evaluation. The results led to the following conclusions: there were great differences of scores between materials, 0.1 (Dyract) and 4.0 (Fuji II LC); Vitremer and Z100 presented similar values (respectively, in scores, 1.7 and 1.6); Fuji II LC presented the largest microleakage, which decreased with the acid etching.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"369-373"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654756","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}
Users of total prosthesis present in general a high frequency of the so called denture stomatitis, associated to erythematous candidiasis. So, we evaluated the susceptibility of oral yeast to three antifungal agents. Strains of Candida albicans isolated from patients with denture stomatitis were evaluated in relation to the susceptibility of the antifungal drugs as amphotericin B (polyenic derivatives), and azole agents as ketoconazole and miconazole. The antifungal activity was evaluated, and the minimal inhibitory concentration (MIC) and minimal fungicide concentration (MFC) were determined utilizing the agar dilution method. The results demonstrated low values for MICs and MFCs (0.15 mg/ml) for AmB in face of all yeast present. For miconazole and ketoconazole, MICs were invariably £ 4.00 mg/ml, while values of the MFC were ³ 16.00 mg/ml for the majority of the strains. We could conclude that AmB presented a major fungicidal action in vitro, while azoles demonstrated a fungistatic but not fungicidal profile. So, we can consider that new drugs, mainly topical ones, are needed to treat lesions related to denture stomatitis, so commonly observed in wearers of dental prostheses.
{"title":"Suscetibilidade a antifúngicos de cepas de Candida albicans isoladas de pacientes com estomatite protética","authors":"Jéssica Moreira Batista, Esther Goldenberg Birman, Arlete Emily Cury","doi":"10.1590/S0103-06631999000400005","DOIUrl":"https://doi.org/10.1590/S0103-06631999000400005","url":null,"abstract":"Users of total prosthesis present in general a high frequency of the so called denture stomatitis, associated to erythematous candidiasis. So, we evaluated the susceptibility of oral yeast to three antifungal agents. Strains of Candida albicans isolated from patients with denture stomatitis were evaluated in relation to the susceptibility of the antifungal drugs as amphotericin B (polyenic derivatives), and azole agents as ketoconazole and miconazole. The antifungal activity was evaluated, and the minimal inhibitory concentration (MIC) and minimal fungicide concentration (MFC) were determined utilizing the agar dilution method. The results demonstrated low values for MICs and MFCs (0.15 mg/ml) for AmB in face of all yeast present. For miconazole and ketoconazole, MICs were invariably £ 4.00 mg/ml, while values of the MFC were ³ 16.00 mg/ml for the majority of the strains. We could conclude that AmB presented a major fungicidal action in vitro, while azoles demonstrated a fungistatic but not fungicidal profile. So, we can consider that new drugs, mainly topical ones, are needed to treat lesions related to denture stomatitis, so commonly observed in wearers of dental prostheses.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"343-348"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S0103-06631999000400005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67654778","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}
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