Fragment reattachment using a technique with no preparation and an adhesive system associated with an intermediate composite with good mechanical properties can restore part of the resistance of the fractured tooth
BACKGROUND / AIMS Fragment reattachment is a procedure that offers advantages , such as preservation of tooth structure and maintenance of color , shape , and translucency of the original tooth .
The aim of this study was to analyze the reattachment techniques used to restore anterior teeth fractured by trauma .
Fracture resistance of tooth fragment reattachment: effects of different preparation techniques and adhesive materials.
The purpose of this study was to evaluate and compare the bond strengths of experimentally fractured human tooth fragments reattached with different adhesive material s and retentive techniques in vitro . Uncomplicated crown fractures were obtained on intact human m and ibular permanent incisors by applying perpendicular load to the buccal aspect of tooth crowns . Fractured teeth were r and omly assigned into one of three reattachment protocol s : ( i ) Simple reattachment , ( ii ) Overcontour preparation , and ( iii ) Internal dentin groove . The first and second groups were divided into 10 subgroups , and the third group into five subgroups ( n = 10 per group ) with respect to five different adhesive systems ( Prime&Bond NT , Adper Single Bond II , Adper Prompt L-Pop , Clearfil S(3 ) Bond , G Bond ) used with or without a hybrid resin composite ( Z250 ) . Restored teeth were subjected to thermal cycling , and subsequently to the same loading protocol used for fracturing intact teeth . Fracture strength after reattachment procedures was recorded as a percentage of the original fracture strength . Both type of adhesive material and placement of an intermediate layer of resin composite affected the fracture resistance ( P < 0.05 ) . The highest fracture strength recovery was obtained using the internal dentin groove technique ( 54 + /- 0.58 % , P < 0.05 ) , followed by the overcontour and simple reattachment protocol s ( 49 + /- 0.58 % and 32 + /- 0.82 % , respectively , P < 0.05 ) . Ultramorphological evaluation of bonded specimens revealed voids and microcracks along the adhesive interface , which might contribute to postadhesive failure
Fragment reattachment using a technique with no preparation and an adhesive system associated with an intermediate composite with good mechanical properties can restore part of the resistance of the fractured tooth
BACKGROUND / AIMS Fragment reattachment is a procedure that offers advantages , such as preservation of tooth structure and maintenance of color , shape , and translucency of the original tooth .
The aim of this study was to analyze the reattachment techniques used to restore anterior teeth fractured by trauma .