Overview authors rarely defined systematic reviews that are included in their overviews.

Objectives: To report systematic review definitions that are published in overviews of reviews and to propose a new classification of systematic reviews.

Study Design And Setting: In this review of overviews, we searched PubMed for systematic review definitions that were reported in overviews of reviews that were published in the medical literature between November 2017 and May 2018. Two independent authors extracted and descriptively reported the systematic review definitions from the overviews.

Risk of bias over time in updates of Cochrane oral health reviews.

Objectives: To assess the changes in the risk of bias (RoB) across different versions of the same Cochrane systematic review, and to identify characteristics of systematic reviews which may be associated with different RoB scores by means of regression analysis.

Methods: We examined changes in RoB ratings in domains of randomized controlled trials (RCTs) and controlled trials (CTs) included in original Cochrane systematic reviews and their updates published in oral health. First, we checked the number of domains assessed for RoB in the different versions of the systematic review.

Use of Biologic Agents to Promote Bone Formation in Implant Dentistry: A Critical Assessment of Systematic Reviews.

Purpose: The use of biologic agents is emerging in bone regeneration procedures due to their ability to increase cellular events in wound healing and therefore to obtain more predictable outcomes. Hence, the aim of the present study was to critically evaluate the methodology of systematic reviews investigating biologic agents in promoting bone formation and implant site development.

Materials And Methods: A literature search for systematic reviews with and without meta-analyses was performed in Medline, Embase, and the Cochrane database, as well as in journals with high impact factors in periodontics and implant dentistry.

The Quality of Reporting of Measures of Precision in Animal Experiments in Implant Dentistry: A Methodological Study.

Purpose: Information on precision of treatment-effect estimates is pivotal for understanding research findings. In animal experiments, which provide important information for supporting clinical trials in implant dentistry, inaccurate information may lead to biased clinical trials. The aim of this methodological study was to determine whether sample size calculation, standard errors, and confidence intervals for treatment-effect estimates are reported accurately in publications describing animal experiments in implant dentistry.

Schneiderian Membrane Thickness and Clinical Implications for Sinus Augmentation: A Systematic Review and Meta-Regression Analyses.

Background: Schneiderian membrane thickness (SMT) has been regarded as a key factor for influencing membrane perforation, which may jeopardize the final clinical outcome of sinus augmentation. Hence, this systematic review aims at studying the mean SMT and further investigating patient-related factors that may affect SMT. As a secondary goal, the association between SMT and membrane perforation rate was studied.

The risk of bias of animal experiments in implant dentistry: a methodological study.

Objectives: To evaluate the risk of bias (ROB) in reports of randomised controlled trials (RCTs) of animal experiments published in implant dentistry, and to explore the association between animal experiment characteristics and ROB.

Material And Methods: We searched the MEDLINE (via PubMed), SCOPUS and SciELO databases from 2010 to March 2015 for reports of RCTs of animal experiments published in implant dentistry. We evaluated independently and in duplicate the ROB of these experiments by the use of a tool specifically developed to evaluate ROB in animal studies, the SYRCLE's tool.