FABRICATE OVERDENTURE TYPE A

If the impression is a fixture level impression (direct or indirect), attach implant analogs according to impression technique. Work up model (Tutorial).
1a.
If the impression is over already installed attachment abutments press corresponding attachment analogs in to impression and pour a stone model without soft tissue moulage.
1b.
Choose attachment abutments (Locator® Tutorial, ball abutment a.o.) with appropriate collar height according to the tissue height above the implant. The attachment portion of the abutment should be slightly above the tissue so the housing once attached does not impinge on the tissue. Connect attachment housings to attachment abutments or attachment analogs.
2.
Block out undercuts on model and adapt light cure base plate material (Triad® by Dentsply Trubyte) to the model, incorporating the attachment housings. Build up wax rim to base plate and send to doctors office for VOD.
3.
Mount models and set teeth in wax on base plate. Send for try in and bite record with wax set up in situ.
4.
Remount and reset teeth if necessary. Prepare reinforcement substructure if needed.
5.
Invest wax up in flask, boil out wax and add retention to acrylic teeth.
6.
Apply separator and pack or inject acrylic (Lucitone 199® by Dentsply Trubyte, SR Ivocap by Ivoclar) into the flask. Cure according to acrylic manufacturer guidelines.
7.
Break out processed denture and model. Mount the processed denture and adjust occlusal as needed.
8.
Finish and polish denture.
9.
Change processing liner or o-ring  to desired final liner or o-ring .
10.