Comparative evaluation of the retention of two different preformed molar bands: An in vitro study

: The purpose of giving space maintainer in primary dentition is to prevent the migration adjacent teeth, thus holding dental arch for succedaneous tooth erupt. Molar band fundamental component maintainer. retention surface important ensure fixed appliance therapy. Several methods have been described improve mechanical retentive surfaces bands including sandblasting, burs, etc. Sandblasting metal improves by roughening, thereby increasing area and improving potential degree attachment. aim study was evaluate compare forces require deband preformed pre- sandblasted in-office molar determine which type successful superior retention. Twenty sound permanent molars were selected equally divided into two groups. In group I, pre cemented onto teeth II, using ReLyX U200 as luting cement both. samples tested their resistance dislodgement on Instron Universal testing machine tensile mode. result showed that debanding required remove pre-sandblasted higher compared bands. Pre-sandblasted resulted greater roughness providing a stronger bond between