Fabrication of a definitive cast to facilitate the delivery of an implant-tissue supported overdenture

A Technique to Evaluate the Space for Retentive Components under a Removable Prosthesis

“…As the intaglio surface of the wax trial denture has been relieved, adding the wax spacer on the definitive retentive components and making a wash impression on the definitive cast will be a simple procedure. It has been reported that doing so will save time at chairside when delivering the prosthesis . A silicone‐type occlusal registration can be made prior to the wash impression to prevent a possible change in the occlusal relationship.…”

“…It has been reported that doing so will save time at chairside when delivering the prosthesis. 8 A silicone-type occlusal registration can be made prior to the wash impression to prevent a possible change in the occlusal relationship. This occlusal record can also be used to mount the new cast from the wash impression.…”

“…Use the silicone putty matrices as the guide to select or fabricate the retentive components (Figs and ). Remove all the block‐out wax from the definitive cast with a steamer (Portable Steamer; Belle de St. Claire, Orange, CA). After the fabrication and try‐in of the definitive retentive components, insert them on the definitive case and cover them with a layer of baseplate wax (TruWax; Dentsply International, York, PA; Fig ) Apply a layer of tray adhesive on the intaglio surface of the trial denture and make a wash impression with the low‐viscosity PVS impression material (Aquasil Ultra LV) on the definitive cast (Fig ).…”

A technique for relining bar-retained overdentures

“…[6][7][8] The difference in the support characteristics of these structures leads to minor movement of the overdenture. [8][9][10][11][12] This rotational movement increases when posterior residual ridge resorption occurs, and the overdenture loses its posterior vertical support and should be relined, 13 one of the most common complications of implant overdentures. [13][14][15][16][17][18][19] Making impressions for relining a bar-retained overdenture is complicated due to undercuts under the bar.…”

“…20 DISCUSSION Different impression procedures have been used for relining the implantsupported overdentures. 5,12,22,23 Although the presented method requires more laboratory procedures, it has several advantages. In contrast to most reline impression methods, 23,24 the shape of residual ridge that is situated beneath the bar attachment can be recorded, which eliminated the need to block out the bar undercuts.…”