Designing a bar 

How to design a bar depends on the type of bar. Detailed information is supplied when clicking the title of the step.

Note

Although it is possible to revert to a previous step, it is strongly recommended to follow the order of the steps to avoid undoing work previously completed.

Bar type Steps
Bar with riders
(Round, Dolder  and Hader bars)		 1. Select a bar type.
2. Align the model.
3. Adjust the segments.
4. Adjust the cylinder height.
5. Position the attachments (optional).
6. Bevel a cylinder (optional).
7. Display riders on the bar (optional).
8. Adjust the link to the offset cylinder (optional for Dolder bars)
9. Finish the bar design.
Free-form milled bar 1. Align the model.
2. Adjust the segments.
3. Position the attachments.
4. Adjust the link to the offset cylinder.
5. Finish the bar design.
Wrap-around bar 1. Align the model.
2. Adjust the segments.
3. Bevel a cylinder (optional).
4. Adjust the link to the offset cylinder.
5. Finish the bar design.
Hybrid bar 1. Align the model.
2. Adjust the segments.
3. Bevel a cylinder (optional).
4. Adjust the link to the offset cylinder.
5. Define the anterior region of the Hybrid bar (optional).
6. Place retentions on a Hybrid bar (optional).
7. Finish the bar design.
Montreal bar 1. Align the model.
2. Adjust the segments.
3. Verify the gingival surface of the bar.
4. Finish the bar design.
Montreal bar with metallic lingual 1. Align the model.
2. Adjust the segments.
3. Adjust the cylinder height (optional).
4. Bevel a cylinder (optional).
5. Verify the gingival surface of the bar.
6. Finish the bar design.
Paris bar 1. Align the model.
2. Adjust the segments.
3. Add attachments.
4. Verify the gingival surface of the bar.
5. Finish the bar design.

Tips

Each bar type has its own design characteristics. These tips will help you remember the basics for each bar type.

Bar type Tip
Removable prosthesis bar types
Round Leave enough space for the riders. Select Show riders from the Bar parameters bar parameters icon and use the 2D cross-section view to check if there is enough space around the bar to be able to clip the riders.
The length of the riders is not adjustable, make sure the bar sections are long enough to accommodate the riders.
It is recommended to design a bar in straight sections to allow room for the riders and housings.
Dolder Leave enough space for the riders. Select Show riders from the Bar parameters bar parameters icon and use the 2D cross-section view to check if there is enough space around the bar to be able to clip the riders.
The riders come in length of 50 mm that can be cut.
It is recommended to design a bar in straight sections to allow room for the riders and housings.
Hader Leave enough space for the riders. Select Show riders from the Bar parameters bar parameters icon and use the 2D cross-section view to check if there is enough space around the bar to be able to clip the riders.
The riders come in lengths of 5 mm that may be cut to size. When placing an order, the number of parts needed are automatically set. You can increase the number of riders or remove the parts from the order.
It is recommended to design a bar in straight sections to allow room for the riders and housings.
Free-form milled Use the 2D cross-section view to make sure there is enough space around, under and over the attachments. Distal attachments should be set using the options of the Attachment positioning attachments icon (available in the Attachment positioning tool attachment positioning icon) rather than setting them into place manually.
Paris The gingival surface of the bar should be convex to avoid any bacteria or plaque build up. Use the 2D cross-section view to validate the shape and distance of the gingival surface of the bar and to make sure there is enough space for the attachments and their housings. Use the Fit to gum parameters to make sure spacing between ridge and gingival surface of the bar is adequate. The buccal and lingual surface of the bar must be clear of the ridge or gingival surface. Height must be sufficient to provide solidity.
Fixed prosthesis bars
Montreal The gingival surface of the bar should be convex to avoid any bacteria or plaque build up. Use the 2D cross-section view to validate the shape and distance of the gingival surface of the bar. Use the Fit to gum parameters to make sure spacing between ridge and gingival surface of the bar is adequate. The buccal and lingual surface of the bar must be clear of the gingival surface. Height must be sufficient to provide solidity and to accommodate bucco/lingual retention holes.
Montreal with metallic lingual The gingival surface of the bar should be convex to avoid any bacteria or plaque build up. Use the 2D cross-section view to validate the shape and distance of the gingival surface of the bar. Use the Fit to gum parameters to make sure spacing between ridge and gingival surface of the bar is adequate. The buccal and lingual surface of the bar must be clear of the gingival surface. Height must be sufficient to provide solidity and to accommodate retention lugs.
Use the Lingual metallic handles of the Segments segments icon parameters to angle the metallic lingual towards the teeth and give a smooth, rounded shape for a comfortable rest for the tongue. Use the 2D cross-section view to make sure that a 2.65 mm spacing is left for the retention pins. It is recommended to allow sufficient height of bar to accommodate retention lug holes by looking at the 2D cross-section view.
Wrap-around Use the 2D cross-section view to calculate how much room can be left for the acrylic. Ideally 2 mm should be left under the bar and at least 2-3 mm around the bar, otherwise the acrylic will be too thin, prone to breakage and the bar may even be visible through the acrylic.

DTX Studio™ Lab 1.10 © 2019 Medicim N.V. All rights reserved.