Context: In today's era of evident-based minimally invasive dentistry, reattachment of the fractured crown fragment of a traumatized anterior tooth has become the most favourable treatment option.
Aim:The aim of this in-vitro study was to compare and evaluate the fracture resistance of sound maxillary incisor teeth reattached using different tooth preparation techniques, namely, circumferential chamfer, vertical groove with fibre reinforced composite (FRC) post and internal dentin groove.Material and Methods: Sixty sound permanent maxillary incisors were mounted in acrylic blocks and divided randomly into four groups (n = 15). In Group A, 15 teeth were retained as positive control in normal saline. The remaining three groups where fragment was to be reattached, a standardized section was prepared through the middle third of crown, perpendicular to long axis of tooth with a water-cooled low speed diamond disc to simulate Ellis and Davey Class II fracture. In Group B, subsequent to reattachment with composite, a 1 mm deep circumferential chamfer was prepared on the fracture line using a diamond bur and restored with composite.