American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics
-
Am J Orthod Dentofacial Orthop · Nov 2009
Randomized Controlled Trial Comparative StudyLow-level laser therapy for pain caused by placement of the first orthodontic archwire: a randomized clinical trial.
The purpose of this study was to clinically evaluate the effect of low-level laser therapy (LLLT) as a method of reducing pain reported by patients after placement of their first orthodontic archwires. ⋯ Based on these findings, we concluded that LLLT efficiently controls pain caused by the first archwire.
-
Am J Orthod Dentofacial Orthop · Nov 2009
Are studies reporting significant results more likely to be published?
Our objective was to assess the hypothesis that there are variations of the proportion of articles reporting a significant effect, with a higher percentage of those articles published in journals with impact factors. ⋯ Journals seem to prefer reporting significant results; this might be because of authors' perceptions of the importance of their findings and editors' and reviewers' preferences for significant results. The implication of this factor in the reliability of systematic reviews is discussed.