tailieunhanh - báo cáo khoa học: " Comparative analysis of slot dimension in lingual bracket systems"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Comparative analysis of slot dimension in lingual bracket systems | Head Face Medicine BioMed Central Research Comparative analysis of slot dimension in lingual bracket systems Anton Demling Marc P Dittmer and Rainer Schwestka-Polly Open Access Address Department of Orthodontics Hannover Medical School Carl-Neuberg-Strasse 1 30625 Hannover Germany Email Anton Demling - Marc P Dittmer - Rainer Schwestka-Polly - Corresponding author Published 15 December 2009 Head Face Medicine 2009 5 27 doi 1746-160X-5-27 Received 25 September 2009 Accepted 15 December 2009 This article is available from http content 5 1 27 2009 Demling et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Orthodontic treatment with fixed appliances requires - among others - the correct clinical expression of torque which depends on the precise fitting of archwire and slot. Especially in the lingual technique torque problems become clinically more evident than in labial appliances also with respect to the vertical alignment of teeth due to different distances from the center of resistance. The purpose of the present study was to compare the preciseness of slot dimensions of different lingual bracket systems. Methods Three lingual bracket systems were included in the study 7th Generation and STb Ormco Glendora CA USA Incognito TOP-Service 3 M Unitek Monrovia CA USA . Non destructive analysis of vertical slot dimensions was performed using precision pin gauges Azurea Belprahon Switzerland that were tapered in increments of mm inch . The sizes of 240 incisor and canine brackets were measured per system total 720 . Data were compared using one-way ANOVA. A p-value was