For bleaching, all the teeth were embedded in colorless and chemically activated acrylic resin (VIPI Flash; VIPI Produtos Odontologicos, Pirassununga, SP, Brazil) in a polyvinyl chloride ring (20 mm highx20 mm inside diameter), with the labial surface of the teeth perpendicular to the horizontal plane, using a parallelometer
Afterward, teeth roots were embedded in auto-polymerizing resin (Idofast Unipol, Unidesa-Odi, Madrid, Spain) up to 2-mm apex of CEJ and oriented with their long axes perpendicular to the horizon using a custom-made parallelometer
. Each root was removed from the resin block upon appearance of primary signs of polymerization.
Type III plaster models were obtained, as well as occlusal records and tests on semi-adjustable articulator and parallelometer
. Based on this analysis, a partially removable prosthesis with bilateral distal extension was planned; this required a careful design since characteristics of the residual ridge and base movement during its functioning would determine the occlusal efficacy of the prothesis.