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Wyatt TD, Roberts HW. Simulated Hydrostatic Pulpal Pressure Effect on Microleakage-An Initial Study. Oper Dent 2024; 49:290-299. [PMID: 38632850 DOI: 10.2341/23-123-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2023] [Indexed: 04/19/2024]
Abstract
PURPOSE This study's purpose was to evaluate the effect of simulated in vitro hydrostatic pulpal pressure (HPP) on microleakage. METHODS AND MATERIALS Extracted third molars (n=12) were sectioned 5 mm below the cementoenamel junction, pulp tissue removed, and the sectioned crowns mounted on a Plexiglas plate penetrated by an 18-gauge stainless steel tube. The mounted specimen mesial surface received a 2×4×6 mm Class V preparation followed by restoration with a strongly acidic, one-step dental adhesive and a flowable microfilled resin, following all manufacturers' instructions. Restorations were finished to contour, and tubing was attached to a 20-cm elevated, 0.2% rhodamine G reservoir to the specimen steel tube for 48 hours. Specimens then received a nail polish coating to within 1 mm of the restoration margins and were placed in 2% methylene blue (MB) dye for 24 hours, followed by rinsing, embedding in epoxy resin, and sectioning into 1 mm slices using a diamond saw. Controls were intact molars (n=12) processed as above but without HPP. Specimen slices were evaluated using laser confocal microscopy with images exported to ImageJ software with microleakage assessed as the MB linear penetration as a percentage of the total interfacial wall length. Mean values were evaluated with the Kruskal Wallis/Dunn test at a 95% confidence level. RESULTS The control specimens demonstrated significantly greater (p<0.0001) MB penetration than experimental specimens with simulated HPP. Under this study's conditions, simulated HPP significantly decreased MB dye penetration. CONCLUSION Studies accomplished without simulated HPP may overestimate microleakage results.
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Affiliation(s)
- T D Wyatt
- Taylor D Wyatt DMD, dental student, University of Kentucky College of Dentistry, Lexington, KY, USA
| | - H W Roberts
- *Howard W Roberts DMD MS, associate professor, University of Kentucky College of Dentistry, Lexington, KY, USA
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2
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ABDIN ARMF, AL-TAYYAN MH. Methodologies used for testing the sealability of endodontic temporary fillings in vitro: A narrative review. Saudi Dent J 2023; 35:769-779. [PMID: 38025591 PMCID: PMC10658378 DOI: 10.1016/j.sdentj.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 06/21/2023] [Accepted: 07/02/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction The ability of the temporary filling to seal endodontic access cavities may be crucial for the success of endodontic treatment. Numerous in vitro studies have investigated the sealability of the temporary fillings used in endodontic treatments. However, in vitro sealability studies have been criticized for their inconsistent results and questionable clinical relevance. Some journals have imposed moratoriums on publishing such studies to encourage researchers to test their validity and clinical relevance. Since the implementation of this moratorium, little progress has been made in this field. To further encourage researchers to investigate the reliability of these studies, this review presents an overview of the methodologies of studies that examine the ability of temporary filling materials to seal the endodontic access cavity in vitro and discusses the criticisms of these studies in detail. Materials and Methods PubMed, Scopus, and Embase electronic databases were searched to identify studies that tested in vitro the ability of temporary filling materials to seal endodontic access cavities. Only original articles published in English between 01/01/1970 and 28/02/2022 were included. Results The search yielded 551 results. After removing duplicates and excluding studies that did not meet the inclusion criteria, 94 studies were included in this review. Conclusion Although clinical studies may be the best way to test the performance of temporary fillings, the ethical importance of conducting preliminary in vitro studies is undeniable. It seems that questioning the reliability of in vitro sealability studies is not based on sufficient scientific evidence and that the inconsistencies in the results of these studies may be due to differences in the methodological and clinically relevant variables between them, rather than due to their unreliability.
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Affiliation(s)
- Abdul Rahman MF ABDIN
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Damascus University, Damascus, Syria
| | - Mouhammad H AL-TAYYAN
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Damascus University, Damascus, Syria
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3
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Bürklein S, Arias A. Effectiveness of root canal instrumentation for the treatment of apical periodontitis: A systematic review and meta-analysis. Int Endod J 2023; 56 Suppl 3:395-421. [PMID: 35670625 DOI: 10.1111/iej.13782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND The development of endodontic instruments has rapidly advanced, but their impact on endodontic outcome parameters remains unclear. OBJECTIVES This systematic review aimed to answer the following PICOT questions: In patients with apical periodontitis (P) what is the effectiveness of root canal instrumentation ([Q1] performed with contemporary techniques [I] in comparison with 'traditional' techniques [C]] and ([Q2] performed with contemporary engine-driven NiTi instruments [I] compared with other types of contemporary engine-driven NiTi instruments [with different design and/or technology] [C]) in terms of clinical and patient-related outcomes (O)? METHODS After PROSPERO protocol registration, a literature search was conducted using Clarivate Analytics' Web of Science, Scopus, PubMed and Cochrane Central Register of Controlled Trials. Grey literature and major journal contents were examined. Two independent reviewers performed the study selection, data extraction and appraisal of included studies. A quantitative meta-analysis was considered, and statistical heterogeneity and overall quality of evidence were assessed. RESULTS Nine studies were identified showing substantial methodological differences. Five studies addressed PICOT 1 and three PICOT 2, whereas one study aimed both. A random-effects meta-analysis model was considered for the outcome 'radiographic evidence of normal periodontal ligament space or reduction of apical lesion size' (PICOT 1) based on three studies with 332 evaluable participants and showed that contemporary instrumentation was associated with a more favourable outcome (p = .005) compared with root canal preparation with stainless steel instruments (odds ratio = 2.07 [95%-confidence interval = 1.25-3.44]) with no evidence of statistical heterogeneity (I2 = 0%) but low quality of evidence. DISCUSSION Albeit a few studies fulfilled eligible criteria, no study had a low risk of bias. Compelling evidence indicating significantly different outcome rates using different endodontic instruments when treating teeth with apical periodontitis is lacking. CONCLUSIONS In terms of healing, the results of the meta-analysis determined the higher effectiveness of root canal instrumentation performed with contemporary techniques in comparison with conventional stainless steel instruments in patients with apical periodontitis followed for a minimum of 1 year with low quality of evidence. No differences could be demonstrated between preparations with traditional stainless steel and contemporary NiTi instruments for other clinical and patient-related outcomes. REGISTRATION PROSPERO (CRD42021274642).
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Affiliation(s)
| | - Ana Arias
- School of Dentistry, Complutense University, Madrid, Spain
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4
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Norström F, Hammarström A. Methodological perspectives on the study of the health effects of unemployment - reviewing the mode of unemployment, the statistical analysis method and the role of confounding factors. BMC Med Res Methodol 2022; 22:199. [PMID: 35864450 PMCID: PMC9306210 DOI: 10.1186/s12874-022-01670-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 06/29/2022] [Indexed: 11/11/2022] Open
Abstract
Introduction Studying the relationship between unemployment and health raises many methodological challenges. In the current study, the aim was to evaluate the sensitivity of estimates based on different ways of measuring unemployment and the choice of statistical model. Methods The Northern Swedish cohort was used, and two follow-up surveys thereof from 1995 and 2007, as well as register data about unemployment. Self-reported current unemployment, self-reported accumulated unemployment and register-based accumulated unemployment were used to measure unemployment and its effect on self-reported health was evaluated. Analyses were conducted with G-computation, logistic regression and three estimators for the inverse probability weighting propensity scores, and 11 potentially confounding variables were part of the analyses. Results were presented with absolute differences in the proportion with poor self-reported health between unemployed and employed individuals, except when logistic regression was used alone. Results Of the initial 1083 pupils in the cohort, our analyses vary between 488–693 individuals defined as employed and 61–214 individuals defined as unemployed. In the analyses, the deviation was large between the unemployment measures, with a difference of at least 2.5% in effect size when unemployed was compared with employed for the self-reported and register-based unemployment modes. The choice of statistical method only had a small influence on effect estimates and the deviation was in most cases lower than 1%. When models were compared based on the choice of potential confounders in the analytical model, the deviations were rarely above 0.6% when comparing models with 4 and 11 potential confounders. Our variable for health selection was the only one that strongly affected estimates when it was not part of the statistical model. Conclusions How unemployment is measured is highly important when the relationship between unemployment and health is estimated. However, misspecifications of the statistical model or choice of analytical method might not matter much for estimates except for the inclusion of a variable measuring health status before becoming unemployed. Our results can guide researchers when analysing similar research questions. Model diagnostics is commonly lacking in publications, but they remain very important for validation of analyses. Supplementary Information The online version contains supplementary material available at 10.1186/s12874-022-01670-1.
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Affiliation(s)
- Fredrik Norström
- Department of Epidemiology and Global Health, Umeå University, 901 87, Umeå, Sweden.
| | - Anne Hammarström
- Department of Epidemiology and Global Health, Umeå University, 901 87, Umeå, Sweden.,Institute of Environmental Medicine, Occupational Medicine, Karolinska Institutet, Stockholm, Sweden
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Alim-Uysal BA, Goker-Kamali S, Machado R. Difficulties experienced by endodontics researchers in conducting studies and writing papers. Restor Dent Endod 2022; 47:e20. [PMID: 35692229 PMCID: PMC9160762 DOI: 10.5395/rde.2022.47.e20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/09/2021] [Accepted: 09/27/2021] [Indexed: 12/02/2022] Open
Abstract
Objectives The study investigated the difficulties experienced by endodontics researchers around the world in conducting studies and writing papers. Materials and Methods A survey consisting of 18 questions on the difficulties experienced by endodontics researchers in performing studies and writing papers was e-mailed to academics in the field of endodontics working at 202 universities. The independent risk factors were analyzed using binary logistic regression at a significance level of 0.05. Results A total of 581 individuals (10.7%) agreed to participate in the study. Almost half the participants (48.2%) reported that they had received some type of training in conducting studies and writing papers. In response to the question, “Do you get help from a statistician to perform the statistical analyses of your studies?,” 77.1% answered “yes.” Around 40% of the participants stated that the need to obtain ethical approval negatively affected their desire to conduct studies. The participants’ regions had no effect on the reported difficulties associated with writing papers in English or conducting statistical analyses (p > 0.05). Most participants (81.8%) reported difficulties in writing the Discussion section, regardless of their region, academic degrees, or years of experience. Conclusions The participants stated they experienced difficulties in many areas, such as conducting statistical analyses, finding new ideas, and writing in English. Engaging in a detailed examination of ethics committee rules, expanding biostatistics education, increasing the number of institutions providing research funding, and increasing the number of endodontics journals can increase the enthusiasm of endodontics researchers to publish papers.
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Affiliation(s)
- Betul Aycan Alim-Uysal
- Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | - Selin Goker-Kamali
- Department of Endodontics, Faculty of Dentistry, Marmara University, Istanbul, Turkey
| | - Ricardo Machado
- Clinical Practice Limited to Endodontics, Navegantes, Santa Catarina, Brazil
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6
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Torres D, Normando D. Biostatistics: essential concepts for the clinician. Dental Press J Orthod 2021; 26:e21spe1. [PMID: 33729294 PMCID: PMC8018753 DOI: 10.1590/2177-6709.26.1.e21spe1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 01/06/2021] [Indexed: 11/22/2022] Open
Abstract
Introduction: The efficiency of clinical procedures is based on practical and theoretical knowledge. Countless daily information is available to the orthodontist, but it is up to this professional to know how to select what really has an impact on clinical practice. Evidence-based orthodontics ends up requiring the clinician to know the basics of biostatistics to understand the results of scientific publications. Such concepts are also important for researchers, for correct data planning and analysis. Objective: This article aims to present, in a clear way, some essential concepts of biostatistics that assist the clinical orthodontist in understanding scientific research, for an evidence-based clinical practice. In addition, an updated version of the tutorial to assist in choosing the appropriate statistical test will be presented. This PowerPoint® tool can be used to assist the user in finding answers to common questions about biostatistics, such as the most appropriate statistical test for comparing groups, choosing graphs, performing correlations and regressions, analyzing casual, random or systematic errors. Conclusion: Researchers and clinicians must acquire or recall essential concepts to understand and apply an appropriate statistical analysis. It is important that journal readers and reviewers can identify when statistical analyzes are being inappropriately used.
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Affiliation(s)
- Darlyane Torres
- Universidade Federal do Pará, Programa de Pós-Graduação em Odontologia (Belém/PA, Brazil)
| | - David Normando
- Universidade Federal do Pará, Departamento de Odontologia (Belém/PA, Brazil)
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Vula V, Ajeti N, Kuçi A, Stavileci M, Vula V. An In Vitro Comparative Evaluation of Apical Leakage Using Different Root Canal Sealers. Med Sci Monit Basic Res 2020; 26:e928175. [PMID: 33235182 PMCID: PMC7702640 DOI: 10.12659/msmbr.928175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background Successful endodontic therapy requires a fluid-tight apical seal. The aim of this in vitro study was to evaluate and compare the apical sealing ability of 3 root canal sealers: Apexit Plus, AH Plus, and Resilon/Epiphany sealers. Material/Methods Samples of 152 single-rooted teeth were divided into 2 test groups, and each group was divided into 3 subgroups based on the preparation and obturation technique. After preparation with the step-back technique, the first group of root canals were obturated with lateral gutta-percha compaction in combination with AH Plus sealer or Apexit Plus or with the Resilon/Epiphany system alone. In the second group, preparation was done with the crown-down technique and root canals were then obturated with Thermafil obturator in combination with AH Plus or Apexit Plus or with Resilon/Epiphany sealer alone. Apical leakage was determined using a dye leakage test observed with a stereomicroscope. The degree of dye leakage was assessed using the t test to comparing the arithmetic averages of the groups. Results In the groups prepared with the step-back technique, the average dye leakage was lower in samples obturated with Resilon/Epiphany, than in those filled with AH Plus/lateral gutta-percha compaction or Apexit Plus/lateral gutta-percha compaction. In groups prepared with the crown-down technique and obturated with the Resilon/Epiphany system, the average dye leakage was lower than in those filled with AH Plus/Thermafil obturation and those filled with Apexit Plus/Thermafil obturation. Conclusions Although all preparation and obturation techniques showed dye penetration, the crown-down technique paired with the Resilon/Epiphany system showed the least leakage.
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Affiliation(s)
- Violeta Vula
- Department of Dental Pathology and Endodontics, Faculty of Medicine, University of Prishtina, Prishtina, Kosovo
| | - Nexhmije Ajeti
- Department of Operative Dentistry and Endodontology, University for Business and Technology, Prishtina, Kosovo
| | - Astrit Kuçi
- Department of Dental Pathology and Endodontics, AAB College, Prishtina, Kosovo
| | - Miranda Stavileci
- Department of Dental Pathology and Endodontics, Faculty of Medicine, University of Prishtina, Prishtina, Kosovo
| | - Vegim Vula
- Private Dentistry Clinic "Viodent", Prishtina, Kosovo
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Matranga D, Matera F, Pizzo G. Evaluating the statistical methodology of randomized trials on dentin hypersensitivity management. J Oral Sci 2017; 59:461-468. [PMID: 28855442 DOI: 10.2334/josnusd.16-0663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The present study aimed to evaluate the characteristics and quality of statistical methodology used in clinical studies on dentin hypersensitivity management. An electronic search was performed for data published from 2009 to 2014 by using PubMed, Ovid/MEDLINE, and Cochrane Library databases. The primary search terms were used in combination. Eligibility criteria included randomized clinical trials that evaluated the efficacy of desensitizing agents in terms of reducing dentin hypersensitivity. A total of 40 studies were considered eligible for assessment of quality statistical methodology. The four main concerns identified were i) use of nonparametric tests in the presence of large samples, coupled with lack of information about normality and equality of variances of the response; ii) lack of P-value adjustment for multiple comparisons; iii) failure to account for interactions between treatment and follow-up time; and iv) no information about the number of teeth examined per patient and the consequent lack of cluster-specific approach in data analysis. Owing to these concerns, statistical methodology was judged as inappropriate in 77.1% of the 35 studies that used parametric methods. Additional studies with appropriate statistical analysis are required to obtain appropriate assessment of the efficacy of desensitizing agents.
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Affiliation(s)
- Domenica Matranga
- Department of Health Promotion Sciences and Mother-Child Care "G. D' Alessandro", University of Palermo
| | - Federico Matera
- Department of Surgical, Oncological and Oral Sciences, University of Palermo
| | - Giuseppe Pizzo
- Department of Surgical, Oncological and Oral Sciences, University of Palermo
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9
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Arias A, Peters OA, Broyles IL. New curricular design in biostatistics to prepare residents for an evidence-based practice and lifelong learning education: a pilot approach. Int Endod J 2016; 50:999-1010. [PMID: 27783428 DOI: 10.1111/iej.12714] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 10/24/2016] [Indexed: 11/26/2022]
Abstract
AIM To develop, implement and evaluate an innovative curriculum in biostatistics in response to the need to foster critical thinking in graduate healthcare education for evidence-based practice and lifelong learning education. METHODOLOGY The curriculum was designed for first-year residents in a postgraduate endodontic programme using a six-step approach to curriculum development to provide sufficient understanding to critically evaluate biomedical publications, to design the best research strategy to address a specific problem and to analyse data by appropriate statistical test selection. Multiple learner-centred instructional methods and formative and summative assessments (written tasks, simulation exercises, portfolios and pre-post knowledge tests) were used to accomplish the learning outcomes. The analysis of the achievement of the group of students and a satisfaction survey for further feedback provided to the residents at the end of the curriculum were used for curriculum evaluation. RESULTS All residents demonstrated competency at the end of the curriculum. The correct answer rate changed from 36.9% in the pre-test to 79.8% in the post-test. No common errors were detected in the rest of the assessment activities. All participants completed the questionnaire demonstrating high satisfaction for each independent category and with the overall educational programme, instruction and course in general. CONCLUSIONS The curriculum was validated by the assessment of students' performance and a satisfaction survey, offering an example of a practical approach to the teaching of statistics to prepare students for a successful evidence-based endodontic practice and lifelong learning education as practicing clinicians.
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Affiliation(s)
- A Arias
- Department of Endodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA.,Department of Conservative Dentistry, School of Dentistry, Complutense University, Madrid, Spain
| | - O A Peters
- Department of Endodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, USA
| | - I L Broyles
- Medical Education Leadership, University of New England, Biddeford, ME, USA
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Lucena C, Souza EM, Voinea GC, Pulgar R, Valderrama MJ, De-Deus G. A quality assessment of randomized controlled trial reports in endodontics. Int Endod J 2016; 50:237-250. [DOI: 10.1111/iej.12626] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 02/28/2016] [Indexed: 11/29/2022]
Affiliation(s)
- C. Lucena
- Department of Conservative Dentistry; School of Dentistry; University of Granada; Granada Spain
| | - E. M. Souza
- Department of Dentistry II; Federal University of Maranhão UFMA; São Luis Brazil
| | | | - R. Pulgar
- Department of Conservative Dentistry; School of Dentistry; University of Granada; Granada Spain
| | - M. J. Valderrama
- Department of Statistics and Operations Research; Faculty of Pharmacy; University of Granada; Granada Spain
| | - G. De-Deus
- Department of Endodontics; Grande Rio University (UNIGRANRIO); School of Dentistry; Rio de Janeiro Brazil
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11
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Jokstad A. Secondary caries and microleakage. Dent Mater 2016; 32:11-25. [DOI: 10.1016/j.dental.2015.09.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 08/24/2015] [Accepted: 09/04/2015] [Indexed: 10/23/2022]
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Norström F. Poor quality in the reporting and use of statistical methods in public health - the case of unemployment and health. Arch Public Health 2015; 73:56. [PMID: 26576268 PMCID: PMC4645480 DOI: 10.1186/s13690-015-0096-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 09/14/2015] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND It has previously been reported that many research articles fail to fulfill important criteria for statistical analyses, but, to date, these reports have not focused on public health problems. The aim of this study was to investigate the quality of reporting and use of statistical methods in articles analyzing the effect of unemployment on health. METHODS Forty-one articles were identified and evaluated in terms of how they addressed 12 specified criteria. RESULTS For most of these criteria, the majority of articles were inadequate. These criteria were conformity with a linear gradient (100 % of the articles), validation of the statistical model (100 %), collinearity of independent variables (97 %), fitting procedure (93 %), goodness of fit test (78 %), selection of variables (68 % for the candidate model; 88 % for the final model), and interactions between independent variables (66 %). Fewer, but still alarmingly many articles, failed to fulfill the criteria coefficients presented in statistical models (48 %), coding of variables (34 %) and discussion of methodological concerns (24 %). There was a lack of explicit reporting of statistical significance/confidence intervals; 34 % of the articles only presented p-values as being above or below the significance level, and 42 % did not present confidence intervals. Events per variable was the only criterion met at an undoubtedly acceptable level (2.5 %). CONCLUSIONS There were critical methodological shortcomings in the reviewed studies. It is difficult to obtain unbiased estimates, but there clearly needs to be some improvement in the quality of documentation on the use and performance of statistical methods. A suggestion here is that journals not only demand that articles fulfill the criteria within the STROBE statement, but that they include additional criteria to decrease the risk of incorrect conclusions being drawn.
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Affiliation(s)
- Fredrik Norström
- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, SE-901 87 Umeå, Sweden
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13
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Souza E. Research that matters: setting guidelines for the use and reporting of statistics. Int Endod J 2015; 47:115-9. [PMID: 24397818 DOI: 10.1111/iej.12198] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erick Souza
- Federal University of Maranhão,, São Luis, MA, Brazil
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14
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Publication of statistically significant research findings in prosthodontics & implant dentistry in the context of other dental specialties. J Dent 2015; 43:1195-202. [DOI: 10.1016/j.jdent.2015.08.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 07/15/2015] [Accepted: 08/11/2015] [Indexed: 12/30/2022] Open
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15
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Bertolaccini L, Viti A, Terzi A. The chicken-and-egg debate about statistics and research. J Thorac Dis 2014; 6:1349-50. [PMID: 25276381 DOI: 10.3978/j.issn.2072-1439.2014.08.26] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 07/26/2014] [Indexed: 11/14/2022]
Affiliation(s)
- Luca Bertolaccini
- 1 Thoracic Surgery Unit, Sacro Cuore Research Hospital, Negrar, Verona, Italy ; 2 Thoracic Surgery Unit, S. Croce e Carle Hospital, Cuneo, Italy
| | - Andrea Viti
- 1 Thoracic Surgery Unit, Sacro Cuore Research Hospital, Negrar, Verona, Italy ; 2 Thoracic Surgery Unit, S. Croce e Carle Hospital, Cuneo, Italy
| | - Alberto Terzi
- 1 Thoracic Surgery Unit, Sacro Cuore Research Hospital, Negrar, Verona, Italy ; 2 Thoracic Surgery Unit, S. Croce e Carle Hospital, Cuneo, Italy
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16
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Moinzadeh AT, Mirmohammadi H, Hensbergen IAM, Wesselink PR, Shemesh H. The correlation between fluid transport and push-out strength in root canals filled with a methacrylate-based filling material. Int Endod J 2014; 48:193-8. [DOI: 10.1111/iej.12300] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 04/16/2014] [Indexed: 11/30/2022]
Affiliation(s)
- A.-T. Moinzadeh
- Department of Endodontology; Academic Centre for Dentistry Amsterdam (ACTA); University of Amsterdam and VU University; Amsterdam The Netherlands
| | - H. Mirmohammadi
- Department of Endodontology; Academic Centre for Dentistry Amsterdam (ACTA); University of Amsterdam and VU University; Amsterdam The Netherlands
| | - I. A. M. Hensbergen
- Department of Endodontology; Academic Centre for Dentistry Amsterdam (ACTA); University of Amsterdam and VU University; Amsterdam The Netherlands
| | - P. R. Wesselink
- Department of Endodontology; Academic Centre for Dentistry Amsterdam (ACTA); University of Amsterdam and VU University; Amsterdam The Netherlands
| | - H. Shemesh
- Department of Endodontology; Academic Centre for Dentistry Amsterdam (ACTA); University of Amsterdam and VU University; Amsterdam The Netherlands
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Li GH, Niu LN, Zhang W, Olsen M, De-Deus G, Eid AA, Chen JH, Pashley DH, Tay FR. Ability of new obturation materials to improve the seal of the root canal system: a review. Acta Biomater 2014; 10:1050-1063. [PMID: 24321349 DOI: 10.1016/j.actbio.2013.11.015] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 11/18/2013] [Accepted: 11/20/2013] [Indexed: 11/25/2022]
Abstract
New obturation biomaterials have been introduced over the past decade to improve the seal of the root canal system. However, it is not clear whether they have really produced a three-dimensional impervious seal that is important for reducing diseases associated with root canal treatment. A review of the literature was performed to identify models that have been employed for evaluating the seal of the root canal system. In vitro and in vivo models are not totally adept at quantifying the seal of root canals obturated with classic materials. Thus, one has to resort to clinical outcomes to examine whether there are real benefits associated with the use of recently introduced materials for obturating root canals. However, there is no simple answer because endodontic treatment outcomes are influenced by a host of other predictors that are more likely to take precedence over the influence of obturation materials. From the perspective of clinical performance, classic root filling materials have stood the test of time. Because many of the recently introduced materials are so new, there is not enough evidence yet to support their ability to improve clinical performance. This emphasizes the need to translate anecdotal information into clinically relevant research data on new biomaterials.
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Moreno-Hidalgo MC, Caleza-Jimenez C, Mendoza-Mendoza A, Iglesias-Linares A. Revascularization of immature permanent teeth with apical periodontitis. Int Endod J 2013; 47:321-31. [PMID: 23889557 DOI: 10.1111/iej.12154] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 06/29/2013] [Indexed: 01/04/2023]
Abstract
The aim of this minireview was to identify and review the scientific evidence regarding regenerative endodontic protocols claiming to revascularize permanent immature teeth with apical periodontitis. The literature was identified using the PubMed/MEDLINE, Scopus, Scirus, EMBASE and Cochrane databases up to February 2013. Studies were selected independently by two different researchers (kappa index: 0.88), based on established inclusion/exclusion criteria. The methodological quality of the reviewed papers was classified as high, medium or low (HQ, MQ, LQ). The search strategy identified 285 titles. Nine studies, both human and animal based, were selected after application of the criteria (LQ:5; MQ:4). In most of these studies (seven of nine), the revascularization protocol included a triple antibiotic combination as canal disinfectant for a period of 1-4 weeks after blood clot formation (LQ:5; MQ:4), although there is no clear consensus about the treatment protocol. Two studies reported tooth discoloration after the revascularization process (LQ:2), and only three (LQ:1; MQ:2) reported a success rate of 54.9% in dogs and 73.6% and 80% in humans, respectively. Revascularization of immature permanent teeth with apical periodontitis is possible and preferable to apexification. Nevertheless, there is a widespread lack of randomized clinical trials and blinded measures. In addition, the small sample sizes that are common in these studies as well as the generally low quality of the analysed publications require the results to be viewed with caution. There is a high risk of bias, with a low quality of available information, for developing clinical guidelines for regenerative endodontic protocols; rigorous randomized clinical trials are therefore needed.
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