Diabetes, Age, and Duration of Supplementation Subgroup Analysis for the Effect of Coenzyme Q10 on Oxidative Stress: A Systematic Review and Meta-Analysis

2021 ◽  
pp. 1-14
Author(s):  
Ghazaleh Hajiluian ◽  
Javad Heshmati ◽  
Sahar Jafari Karegar ◽  
Mahdi Sepidarkish ◽  
Ali Shokri ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Systematic Review ◽  
Coenzyme Q10 ◽  
Antioxidant Defense ◽  
Randomized Clinical Trials ◽  
Assessment Tool ◽  
Meta Analysis ◽  
The Body ◽  
Cochrane Library ◽  
Positive Effects

<b><i>Background:</i></b> Coenzyme Q10 (CoQ10) has been known as ubiquinone or ubidecarenone, which is a kind of lipid-soluble and vitamin-like antioxidant. It has a potent antioxidant effect against oxidation status via various mechanisms, including its ability to regenerate other antioxidants, such as vitamin E and vitamin C, and to increase antioxidant enzymes. Moreover, CoQ10 can quench free radicals and prevent lipid peroxidation. The aim of this systematic review and meta-analysis was to evaluate the effect of CoQ10 on oxidative stress variables. <b><i>Methods:</i></b> A comprehensive electronic database search in Scopus, Web of Science, Embase, Cochrane Library, and Medline was performed to identify eligible randomized clinical trials. A meta-analysis of included studies was performed on selected variables using a random-effects model. Quality assessment was conducted by means of the Cochrane risk of bias assessment tool. <b><i>Results:</i></b> To evaluate the effect of CoQ10 supplementation, 17 trials and 972 participants were included for the meta-analysis. The pooled analysis of primary studies showed that CoQ10 increased serum total antioxidant capacity (standardized mean difference [SMD] 0.62 mmol/L, 95% CI 0.18–1.05, <i>I</i><sup>2</sup> = 76.1%, <i>p</i> ˂ 0.001) and superoxide dismutase (SMD 0.40 U/mg, 95% CI 0.12–0.67, <i>I</i><sup>2</sup> = 9.6%, <i>p</i> ˂ 0.345) levels and decreased malondialdehyde (SMD –1.02 mmol/L, 95% CI –1.60 to –0.44, <i>I</i><sup>2</sup> = 88.2%, <i>p</i> ˂ 0.001) level significantly compared to the placebo group. Although the effect of CoQ10 on nitric oxide (SMD 1.01 µmol/L, 95% CI –1.53 to 3.54, <i>p</i> ˂ 0.001, <i>I</i><sup>2</sup> = 97.8%) and glutathione peroxidase (SMD –0.01 mmol/L, 95% CI –0.86 to 0.84, <i>p</i> ˂ 0.001, <i>I</i><sup>2</sup> = 88.6%) was not significant, CoQ10 can be mentioned as an improvement in antioxidant defense status against reactive oxygen species. <b><i>Conclusion:</i></b> These supplements have positive effects on antioxidant defense against oxidizing agents and elevate antioxidant enzyme levels in the body. However, due to limited research the results should be taken with caution.

scholarly journals Effect of electronic health interventions on metabolic syndrome: a systematic review and meta-analysis

BMJ Open ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. e036927
Author(s):  
Dandan Chen ◽  
Zhihong Ye ◽  
Jing Shao ◽  
Leiwen Tang ◽  
Hui Zhang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Metabolic Syndrome ◽  
Usual Care ◽  
Assessment Tool ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Biochemical Indicators ◽  
Positive Effects

ObjectiveWe aimed to examine whether eHealth interventions can effectively improve anthropometric and biochemical indicators of patients with metabolic syndrome (MetS).DesignSystematic review and meta-analysis.MethodsPubMed, the Web of Science, Embase, Medline, CINAHL, PsycINFO, the Cochrane Library, the Chinese National Knowledge Infrastructure, the Wanfang and Weipu databases were comprehensively searched for papers that were published from database inception to May 2019. Articles were included if the participants were metabolic syndrome (MetS) patients, the participants received eHealth interventions, the participants in the control group received usual care or were wait listed, the outcomes included anthropometric and biochemical indicators of MetS, and the study was a randomised controlled trial (RCT) or a controlled clinical trial (CCT). The Quality Assessment Tool for Quantitative Studies was used to assess the methodological quality of the included articles. The meta-analysis was conducted using Review Manager V.5.3 software.ResultsIn our review, seven RCTs and two CCTs comprising 935 MetS participants met the inclusion criteria. The results of the meta-analysis revealed that eHealth interventions resulted in significant improvements in body mass index (standardised mean difference (SMD)=−0.36, 95% CI (−0.61 to −0.10), p<0.01), waist circumference (SMD=−0.47, 95% CI (−0.84 to −0.09), p=0.01) and systolic blood pressure(SMD=−0.35, 95% CI (−0.66 to −0.04), p=0.03) compared with the respective outcomes associated with the usual care or wait-listed groups. Based on the included studies, we found significant effects of the eHealth interventions on body weight. However, we did not find significant positive effects of the eHealth interventions on other metabolic parameters.ConclusionsThe results indicated that eHealth interventions were beneficial for improving specific anthropometric outcomes, but did not affect biochemical indicators of MetS. Therefore, whether researchers adopt eHealth interventions should be based on the purpose of the study. More rigorous studies are needed to confirm these findings.

The Effects of Resveratrol on Oxidative Stress Markers: A Systematic Review and Meta-Analysis of Randomized Clinical Trials

2020 ◽  
Vol 20 (5) ◽  
pp. 718-727 ◽  
Author(s):  
Mahsa Omidian ◽  
Mina Abdolahi ◽  
Elnaz Daneshzad ◽  
Mohsen Sedighiyan ◽  
Mohadeseh Aghasi ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Systematic Review ◽  
Clinical Trials ◽  
Randomized Clinical Trials ◽  
Meta Analysis ◽  
Serum Levels ◽  
Oxidative Stress Marker ◽  
Cochrane Library ◽  
Oxidative Stress Markers ◽  
Stress Markers

Objective: Recent trial studies have found that resveratrol supplementation beneficially reduces oxidative stress marker, but, there is no definitive consensus on this context. The present systematic review and meta-analysis aimed to investigate the effect of resveratrol supplementation on oxidative stress parameters. Methods: We searched databases of Pubmed, Scopus and Cochrane Library up to December 2018 with no language restriction. Studies were reviewed according to preferred reporting items for systematic reviews and meta-analyses (PRISMA) and Cochrane handbook. To compare the effects of resveratrol with placebo, weighted mean difference (WMD) with 95% confidence intervals (CI) were pooled based on the random-effects model. Results: Among sixteen clinical trials, we found that resveratrol supplementation increased GPx serum levels significantly (WMD: 18.61; 95% CI: 8.70 to 28.52; P<0.001) but had no significant effect on SOD concentrations (WMD: 1.01; 95% CI: -0.72 to 2.74; P= 0.25), MDA serum levels (WMD: -1.43; 95% CI: -3.46 to 0.61; P = 0.17) and TAC (WMD: -0.09; 95% CI: -0.29 to 0.11; P = 0.36) compared to placebo. Finally, we observed that resveratrol supplementation may not have a clinically significant effect on oxidative stress. Conclusion: However, the number of human trials is limited in this context, and further large prospective clinical trials are needed to confirm the effect of resveratrol supplement on oxidative stress markers.

scholarly journals Does Caffeine Consumption Affect the Symptoms of Parkinson’s Disease? A Systematic Review of Clinical Trials

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Anita Reyhanifard ◽  
Sarvin Sanaie ◽  
Mojgan Mirghafurvand ◽  
Sama Rahnemayan ◽  
Arezoo Fathalizadeh ◽  
...  
Keyword(s):  
Systematic Review ◽  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Clinical Trials ◽  
Randomized Clinical Trials ◽  
Assessment Tool ◽  
Meta Analysis ◽  
Experimental Studies ◽  
Risk Of Bias ◽  
Cochrane Library

Objectives: This systematic review of the literature was carried out to see whether coffee consumption could affect Parkinson’s disease (PD) symptoms. Methods: Randomized controlled trials (RCTs), crossover studies, and quasi-experimental studies were assessed to evaluate the effect of caffeine on PD. The databases including Medline/PubMed, ProQuest, Embase, Cochrane Library, and ClinicalTrials.gov were systematically searched. The Cochrane Collaboration’s tool for assessing the risk of bias in randomized clinical trials and the Cochrane risk of bias assessment tool for non-randomized studies of interventions (ROBINS-I) were used to assess the quality of RCTs and non-randomized clinical trials, respectively. A meta-analysis of the results was not possible because of reporting different outcomes. Results: Four papers were included in this study. Only one study reported the significant effect of caffeine on ESS and UPDRS. Another study observed no significant effect of caffeine on ESS during three- and six-week interventions. However, a significant reduction in ESS scores in the sixth week was reported after excluding four protocol violations. This study reported that the UPDRS score reduced in the third week, but significant changes were observed after six weeks. The other two studies did not show a significant effect of caffeine on ESS and UPDRS. Conclusions: Since a meta-analysis was not conducted, there was insufficient evidence to evaluate the effect of caffeine on PD. Thus, it is recommended to conduct more well-designed RCTs with a larger sample size to assess the effect of caffeine on PD.

scholarly journals The effects of clinical decision support system for prescribing medication on patient outcomes and physician practice performance: a systematic review and meta-analysis

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sharare Taheri Moghadam ◽  
Farahnaz Sadoughi ◽  
Farnia Velayati ◽  
Seyed Jafar Ehsanzadeh ◽  
Shayan Poursharif
Keyword(s):  
Systematic Review ◽  
Decision Support ◽  
Patient Outcomes ◽  
Clinical Decision Support ◽  
Meta Analysis ◽  
Clinical Decision ◽  
Cochrane Library ◽  
Physician Practice ◽  
Positive Effects ◽  
Practice Performance

Abstract Background Clinical Decision Support Systems (CDSSs) for Prescribing are one of the innovations designed to improve physician practice performance and patient outcomes by reducing prescription errors. This study was therefore conducted to examine the effects of various CDSSs on physician practice performance and patient outcomes. Methods This systematic review was carried out by searching PubMed, Embase, Web of Science, Scopus, and Cochrane Library from 2005 to 2019. The studies were independently reviewed by two researchers. Any discrepancies in the eligibility of the studies between the two researchers were then resolved by consulting the third researcher. In the next step, we performed a meta-analysis based on medication subgroups, CDSS-type subgroups, and outcome categories. Also, we provided the narrative style of the findings. In the meantime, we used a random-effects model to estimate the effects of CDSS on patient outcomes and physician practice performance with a 95% confidence interval. Q statistics and I2 were then used to calculate heterogeneity. Results On the basis of the inclusion criteria, 45 studies were qualified for analysis in this study. CDSS for prescription drugs/COPE has been used for various diseases such as cardiovascular diseases, hypertension, diabetes, gastrointestinal and respiratory diseases, AIDS, appendicitis, kidney disease, malaria, high blood potassium, and mental diseases. In the meantime, other cases such as concurrent prescribing of multiple medications for patients and their effects on the above-mentioned results have been analyzed. The study shows that in some cases the use of CDSS has beneficial effects on patient outcomes and physician practice performance (std diff in means = 0.084, 95% CI 0.067 to 0.102). It was also statistically significant for outcome categories such as those demonstrating better results for physician practice performance and patient outcomes or both. However, there was no significant difference between some other cases and traditional approaches. We assume that this may be due to the disease type, the quantity, and the type of CDSS criteria that affected the comparison. Overall, the results of this study show positive effects on performance for all forms of CDSSs. Conclusions Our results indicate that the positive effects of the CDSS can be due to factors such as user-friendliness, compliance with clinical guidelines, patient and physician cooperation, integration of electronic health records, CDSS, and pharmaceutical systems, consideration of the views of physicians in assessing the importance of CDSS alerts, and the real-time alerts in the prescription.

scholarly journals Efficacy and safety of anti-epidermal growth factor receptor agents for the treatment of oesophageal cancer: a systematic review and meta-analysis

BMJ Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. e046352
Author(s):  
Lijuan Zhang ◽  
Yanli Song ◽  
Nan Jiang ◽  
Yaqi Huang ◽  
Bo Dong ◽  
...  
Keyword(s):  
Systematic Review ◽  
Growth Factor ◽  
Outcome Measures ◽  
Oesophageal Cancer ◽  
Meta Analysis ◽  
Growth Factor Receptor ◽  
Cochrane Library ◽  
Secondary Outcome ◽  
Efficacy And Safety ◽  
Positive Effects

ObjectivesDespite remarkable advances in the treatment of oesophageal cancer (OC), the role of antiepidermal growth factor receptor (anti-EGFR) agents in treating OC remains controversial. Herein, a systematic review and meta-analysis were conducted to elucidate the efficacy and safety of anti-EGFR agents in patients with OC.DesignMeta-analysis of randomised controlled trials (RCTs) identified by searching the PubMed, Embase, Web of Science, ClinicalTrials.gov, Cochrane Library, Chinese Biology Medicine, China National Knowledge Infrastructure and Wanfang Data Knowledge Service Platform databases from inception to December 2019. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.SettingRCTs from any country and healthcare setting.ParticipantsPatients with OC.InterventionsCombination therapy with anti-EGFR agents and conventional treatments versus conventional treatments alone in patients with OC.Primary and secondary outcome measuresOverall survival (OS) and progression-free survival (PFS) were primary outcome measures, and objective response rate (ORR), disease control rate (DCR) and treatment toxicities were secondary outcome measures.ResultsIn total, 25 RCTs comprising 3406 patients with OC were included. Overall, anti-EGFR treatment significantly improved the OS (HR: 0.81, 95% CI 0.74 to 0.89, p<0.00001), ORR (relative risk (RR): 1.33, 95% CI 1.16 to 1.52, p<0.0001) and DCR (RR: 1.22, 95% CI 1.11 to 1.34, p<0.0001) but not PFS (HR: 0.91, 95% CI 0.76 to 1.08, p=0.26). Anti-EGFR treatment was significantly associated with higher incidences of myelosuppression, diarrhoea, acne-like rash and hypomagnesaemia.ConclusionsOverall, anti-EGFR agents have positive effects on OS, the ORR and DCR in OC. However, considering the high incidence of adverse effects, such as myelosuppression, diarrhoea, acne-like rashes and hypomagnesaemia, careful monitoring of patients with OC is recommended during anti-EGFR treatment.Trial registration numberCRD42020169230.

scholarly journals Effect of Tai Chi on Markers of Oxidative Stress: Systematic Review and Meta-Analysis

2021 ◽  
Vol 18 (7) ◽  
pp. 3458
Author(s):  
Juana Rosado-Pérez ◽  
Osvaldo D. Castelán-Martínez ◽  
Abril J. Mújica-Calderón ◽  
Martha A. Sánchez-Rodríguez ◽  
Víctor Manuel Mendoza-Núñez
Keyword(s):  
Oxidative Stress ◽  
Systematic Review ◽  
Superoxide Dismutase ◽  
Sedentary Behavior ◽  
Tai Chi ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Stress Markers ◽  
Markers Of Oxidative Stress ◽  
Mean Differences

Background: This study aimed to synthesize the evidence of the effect of practicing Tai Chi on oxidative stress markers (OxSM). Methods: This systematic review and meta-analysis was conducting using the MEDLINE, Cochrane Library, ScienceDirect, Scopus, Epistemonikos, Lilacs, and Ovid databases to identify randomized (RCT) and non-randomized (NRCT) clinical trials that evaluated the Tai Chi effect on OxSM compared to sedentary behavior, walking or yoga. Pooled mean differences (MDs) with 95% confidence intervals (95%CI) were estimated using the inverse variance method to determine the effect of Tai Chi on OxSM. PROSPERO register: CRD42019138362. Results: Five RCT and five NRCT were included. Compared to sedentary behavior, regular Tai Chi practice increases the levels of the enzymes superoxide dismutase (MD = 34.97 U/mL, (95%CI, 9.45 to 60.48), 344 participants) and catalase (MD = 15.63 U/mL, (95%CI, 4.05 to 27.22), 110 participants), as well as reducing the levels of lipoperoxides (MD = −0.02 µmol/L, (95%CI, −0.04 to −0.00), 234 participants). For comparisons with walking or yoga, only one study per activity was identified comparing the effect on OxSM. Conclusions: Regular Tai Chi practice increases the levels of superoxide dismutase and catalase, as well as reducing the levels of lipoperoxides. More studies are necessary to determine the effect of Tai Chi on OxSM when compared to other physical activities.

Dental implants survival after nasal floor elevation: a systematic review

2021 ◽  
Author(s):  
Eduardo Anitua ◽  
Beatriz Anitua ◽  
Mohammad Hamdan Alkhraisat ◽  
Laura Piñas ◽  
Asier Eguia ◽  
...  
Keyword(s):  
Systematic Review ◽  
Assessment Tool ◽  
Case Reports ◽  
Meta Analysis ◽  
Lateral Approach ◽  
Cochrane Library ◽  
Good Survival ◽  
Quality Level ◽  
Level Of Evidence ◽  
Nasal Floor

Purpose The aim of this work is to assess the clinical outcomes of implants placed after a nasal floor elevation procedure. Methods A systematic review was conducted using four electronic databases; Medline (Pubmed), Cochrane library, DOAJ and SCOPUS, following the PRISMA statement recommendations to answer the PICO question: “In patients undergoing dental implant placement in the maxillary anterior region (P), Do implants placed after nasal floor elevation (I) have a different survival (O) from those implants placed without grafting procedures (C)?. The study was pre-registered in PROSPERO (CRD42021229479). Included articles quality was assessed using the “NIH quality assessment tool”, “The Newcastle-Ottawa scale” and “JBI critical appraisal tools for case reports''. Results Twelve articles were finally selected, including 151 patients and 460 implants. The weighted mean follow-up was 32.2 months, and the weighted survival rate after this period was 97.64% (range 89.2-100%). No statistical differences could be inferred between the treatments performed in one-stage or two-stage, following a lateral approach or a transcrestal approach or using different grafting materials. A great heterogeneity was found in terms of study design and methodological aspects. For this reason, a quantitative analysis followed by meta-analysis was not possible. Conclusion Within the limitations of this study, implants placed after a nasal floor elevation present a good survival and a low range of complications. In absence of randomized studies, the level of evidence was low, attending the GRADE system and based on the study quality level, the strength of evidence attending the SORT taxonomy was B.

Therapeutic effect of resveratrol supplementation on oxidative stress: a systematic review and meta-analysis of randomised controlled trials

2019 ◽  
Vol 96 (1134) ◽  
pp. 197-205 ◽  
Author(s):  
Mehdi Koushki ◽  
Mostafa Lakzaei ◽  
Hadi Khodabandehloo ◽  
Hossein Hosseini ◽  
Reza Meshkani ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Systematic Review ◽  
Publication Bias ◽  
Randomised Controlled Trials ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Controlled Trials ◽  
Oxidative Markers ◽  
Markers Of Oxidative Stress ◽  
Randomised Controlled

BackgroundResveratrol is a naturally occurring polyphenol compound mainly found in grapes and red wine. The evidence has suggested that resveratrol has an antioxidant effect. However, the results are inconsistent and inconclusive. Thus, we conducted a systematic review and meta-analysis to evaluate the effect of resveratrol supplementation on markers of oxidative stress.MethodsWe searched PubMed, ISI Web of Science, EMBASE, Scopus and the Cochrane library up to December 2018 to identify randomised controlled trials (RCTs) assessing resveratrol supplementation effects on oxidative markers. Heterogeneity, publication bias, risk of bias and subgroup analysis were analysed. This meta-analysis was conducted in accordance with the guidelines of the Preferred ReportingItems for Systematic Reviews and Meta-Analysis (PRISMA).ResultsMeta-analysis of data from 12 RCTs did not support significant effect of resveratrol supplementation on circulating levels of superoxide dismutase (SOD) (standardized mean difference (SMD) (1.12), (95% CI −0.91 to 3.1), p=0.28), catalase (CAT) (SMD (−0.07), (95% CI −1.4 to 1.3), p=0.92) and glutathione peroxidase (GPx) (SMD (−0.76), (95% CI −2.56 to 1.04), p=0.40). Although, resveratrol supplementation increased significantly circulating total antioxidant capacity (TAC) concentrations (SMD (0.52), (95% CI −0.02 to 1.07), p=0.05). Severe heterogeneity was observed between studies, and no obvious publication bias was observed in included RCTs.ConclusionCollectively, our findings of available RCTs did no show any benefit of resveratrol supplementation on SOD, CAT and GPx except for TAC. Well-designed RCTs are necessary to confirm these results.

scholarly journals Efficacy and safety of intradialytic exercise in haemodialysis patients: a systematic review and meta-analysis

BMJ Open ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. e020633 ◽  
Author(s):  
Jiang Pu ◽  
Zheng Jiang ◽  
Weihua Wu ◽  
Li Li ◽  
Liling Zhang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Blood Pressure ◽  
Short Form ◽  
Meta Analysis ◽  
The Body ◽  
Peak Oxygen Consumption ◽  
Cochrane Library ◽  
Efficacy And Safety ◽  
Sf 36 ◽  
Intradialytic Exercise

ObjectiveTo assess the efficacy and safety of intradialytic exercise for haemodialysis patients.DesignSystematic review and meta-analysis.Data sourcesDatabases, including PubMed, Embase, the Cochrane Library, China Biology Medicine and China National Knowledge Infrastructure, were screened from inception to March 2017.Eligibility criteriaRandomised controlled trials (RCTs) aimed at comparing the efficacy and safety of intradialytic exercise versus no exercise in adult patients on haemodialysis for at least 3 months. A minimum exercise programme period of 8 weeks.Data extractionStudy characteristics and study quality domains were reviewed. Studies were selected, and data extracted by two reviewers.Data analysisThe pooled risk ratios and mean differences (MDs) with 95% CIs for dichotomous data and continuous data were calculated, respectively.ResultsA total of 27 RCTs involving 1215 subjects were analysed. Compared with no exercise, intradialytic exercise increased dialysis adequacy (Kt/V) (MD 0.07, 95% CI 0.01 to 0.12, p=0.02) and maximum volume of oxygen that the body can use during physical exertion peak oxygen consumption (MD 4.11, 95% CI 2.94 to 5.27, p<0.0001), alleviated depression standardised mean difference (−1.16, 95% CI −1.86 to –0.45, p=0.001) and improved physical component summary-short form-36 (SF-36) level (MD 7.72, 95% CI 1.93 to 13.51, p=0.009). Also, intradialytic exercise could significantly reduce systolic blood pressure (MD −4.87, 95% CI −9.20 to –0.55, p=0.03) as well as diastolic blood pressure (MD −4.11, 95% CI −6.50 to –1.72, p=0.0007). However, intradialytic exercise could not improve mental component summary-SF-36 level (MD 3.05, 95% CI −1.47 to 7.57, p=0.19). There was no difference in the incidence of adverse events between the intradialytic exercise and control groups.ConclusionsIntradialytic exercise resulted in benefits in terms of improving haemodialysis adequacy, exercise capacity, depression and quality of life for haemodialysis.

Do Tooth- and Cavity-related Aspects of Noncarious Cervical Lesions Affect the Retention of Resin Composite Restorations in Adults? A Systematic Review and Meta-analysis

2020 ◽  
Vol 45 (3) ◽  
pp. E124-E140
Author(s):  
AMO Correia ◽  
E Bresciani ◽  
AB Borges ◽  
DM Pereira ◽  
LC Maia ◽  
...  
Keyword(s):  
Systematic Review ◽  
Latin American ◽  
Randomized Clinical Trials ◽  
Retention Rate ◽  
Meta Analysis ◽  
Grey Literature ◽  
Composite Resins ◽  
Cochrane Library ◽  
Cervical Lesions ◽  
Composite Restorations

SUMMARY Purpose: The purpose was to perform a systematic review and meta-analysis based on the following research question: do tooth- and cavity-related aspects of noncarious cervical lesions (NCCLs) affect the retention of composite restorations? Methods: Randomized clinical trials (RCTs) that evaluated the retention rate of resin restorations in NCCLs were included for the identification and comparison of their characteristics. The search was conducted in PubMed and adapted for Scopus, Web of Science, Latin American and Caribbean Health Sciences Literature database (LILACS), Brazilian Library in Dentistry (BBO), Cochrane Library, and System for Information on Grey Literature in Europe (SIGLE) without restrictions until July 2018. Unpublished and ongoing trial registries were also searched. The Cochrane Collaboration tool was used for assessing risk of bias. The quality of the evidence was graded using the Grading of Recommendations: Assessment, Development and Evaluation. Using the random effects model, a meta-analysis was conducted for each aspect (arch distribution, tooth location, wear facets, dentin sclerosis, shape, size, depth, occluso-gingival distance, and margin location). Results: We retrieved 6738 articles. After removal of duplicates and nonrelevant articles, 24 RCTs remained. The anterior tooth location favored the retention rates of restoration of NCCLs (relative risk [RR], 1.08; 95% confidence interval [CI], 1.00-1.16). The presence of wear facets is a risk factor for the retention of restorations (RR, 0.91; 95% CI, 0.83-0.99). The evidence was moderate for arch distribution and low or very low for all other factors because of heterogeneity, imprecision, and inconsistency. Conclusion: The tooth location and the presence of wear facets can affect the retention of composite resins in NCCLs.

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