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.
