La expresión del torque de los brackets ortodóncicosrevisión sistemática

Zusammenfassung

Introduction: theoretically, the torsional play should be measured just by knowing the dimensions of brackets and slots but in practice it has been proved that there is quite a discrepancy between the information supplied by commercial suppliers and the actual dimensions of arch-brackets. Objetives: to review the published articles on authors who, using in-vitro studies, have evaluated the quantitative effects regarding torque behaviour according to the size of bracket slots and the dimension of stainless steel braces. Materials and methods: a computerized search of the existing papers up to the 09/03/2014 took place employing MEDLINE/pubmed and Scopus data bases. The keywords were: torque, orthodontic brackets. Likewise, a manual search was also conducted on four orthodontic magazines. The inclusion criteria were in-vitro studies, usage of stainless steel archwires and usage of porcelain, metal and plastic conventional or self-ligating brackets. Results: 17 articles have been included in the systematic revision. Conclusion: the insertion angle depends on the dimension and shape of the orthodontic archwire section and the dimension of the bracket slot. It is variable and wider than the published theoretical values.