Acrylic as a finishing material is used for aesthetic purposes. In particular cases, the acrylic finish, and the bar itself need more tuning to obtain the best quality. For example, if the metal surface is already at a minimal distance from the soft tissue, then the acrylic finish will not be applied to that intaglio of the bar, but on the other parts.
The acrylic joint settings appear in the Bar parameters .
The Paris bar offers a type of structure where the acrylic overdenture covers the upper structure of the bar. Because only half the bar is finished with acrylic, the joint position and width must be defined in the software.
Setting | Description |
Acrylic joint on buccal side | The finish line of the acrylic will be set on the buccal surface of bar. |
Joint position | Position of the joint from the base of the bar (mm). |
The Montreal bar (and Montreal bar with metallic lingual) offers another type of structure where the acrylic penetrates holes or lugs on the upper structure and gains its retentive qualities. Because only half the bar is finished with acrylic, the joint position and width must be defined in the software.
Setting | Description |
Acrylic joint on gingival side | The finish line of the acrylic will be set on the gingival surface of the bar. This enables the Joint radius setting (mm). |
Acrylic joint on buccal side | The finish line of the acrylic will be set on the gingival surface of the bar. |
Joint position | Position of the joint from the base of the bar (mm). |
The Acrylic finish line defines the limit of the acrylic finish on the Hybrid bar. A shelf is created on the bar, from which the acrylic material is applied. A separate Acrylic finish line appears with the Hybrid bar types.
The Hybrid bar uses the acrylic finish line almost exactly like the Montreal and Montreal with metallic lingual bar types.
Setting | Description |
Acrylic finish line | Adds a default 1 mm notch to the bar side. This notch marks the limit for the acrylic finish. |
Edit acrylic finish line | Displays the handles along the acrylic finish line and enables its design. |
Lock acrylic finish line position | Prevents the displacement of the acrylic finish line by other deformation tools. |
Shelf incline | Can be expressed as an angle from the perpendicular to the bar wall (0°) or in tenth of millimeter (0.1 mm) representing the drop from the horizontal on the bar wall. Both sides (buccal, lingual) of the acrylic finish line are modified. |