A Systematic and Meta-Analysis of Survival and Failure Rates of Orthodontic Temporary Anchorage Devices in Children

Abstract

Background and aim: TADs for more than a decade, numerous case reports and scientific papers have been published
documenting the clinical feasibility of the TADs mentioned. In contrast to prosthetic oral implants, the literature exploring
the survival and failure rates of orthodontic TADs for children has not been evaluated systematically. Therefore, the aim
of the present systematic review and meta-analysis was determine the survival and failure rates of mini screws in children.
Methods: MEDLINE, PubMed, Cochrane Library, Embase, ISI, google scholar were used as electronic databases to
perform a systematic search for relevant articles published in the dental literature between 2005 and 2019. A commercially
available software program (Endnote X9) was used for electronic title management. Searches were performed with
keywords, “children”, “and temporary anchorage devices OR TADs”, “orthodontic”, “palatal implants”, “mini screws”.
Results: The electronic database search with the applied search strategy and the list of articles excluded based on their full
texts are provided. Twenty studies met the inclusion criteria with 10RCTs, 4pCCTs, 6 pCS. Failure rate of mini screws,
was reported in 17 studies. Data of 896 mini-screws were extracted and pooled in a random-effect model. The pooled
failure rate was 10.17 percent (95% CI, P = 0.000, 99.7%), by meta-analysis, the failure rate.
Conclusions: The use of TADs really expands the envelope of discrepancies in which orthodontic treatment might be
successful.