Hader Bar

1. What are the major advantages of a bar?
Plastic bar pattern, nylon riders. Mechanical snap retention. Optional adjustable gold alloy rider. Overdentures: splint non-vital roots, natural abutment teeth or implants. Partial dentures: splint across anterior and posterior tooth bounded spaces.

2. Is the same bar used for implants?
Yes. If you are connecting implants, then gold cylinders or gold UCLA type abutments are strongly recommended. Their superior fit over plastic components will mean less screw loosening and breakage.

3. How many riders are used on the bar?
Position as many nylon retention riders on the bar as space allows. This will provide space for additional riders to be inserted to increase retention if necessary.

4. What are fabricating riders?
An impression is taken of the master model with the riders in position. The fabricating riders are positioned in the impression and a duplicate processing model poured. The fabricating riders will be held in proper position in the duplicate model by the extensions of the riders in the stone. Do not try to shorten these extensions and place the fabricating riders on the bar. The fabricating riders do not properly fit on the bar and will create retention spaces in the denture base which are too large. When the patient removes the overdenture the nylon riders will tend to be pulled out of the denture base and remain on the bar.5. Is there a special housing for the nylon riders?
Yes. If metal housings are used, slide (this word should be in bold type) them onto the fabricating riders from the end after recovery of the duplicate model. Do not snap the metal housings onto the fabricating riders from the occlusal. This may deform the housings causing the final riders to pull out of the denture.6. Are there special designs for the Hader Bar?
Yes. To splint anterior abutments in combination with attachments on the distal abutments for free-end application. If the attachments on the distal abutments are resilient, they should allow both hinge and vertical movement to prevent potential dislodgement of the riders from the bar. Examples are ERA attachments.

7. What is the best way to service the attachment?
Do not use fabricating riders in the mouth!
The "wash" impression is taken with the existing nylon retention riders in place. The riders must engage the bar completely. Remove the existing nylon riders and replace with fabricating riders and pour model for the rebase processing.

8. Are there metal connectors on the Hader Bar?
Yes. The gold alloy metal riders fit 13 gauge bars and can be used with the Hader Bar. The spacer and metal riders are placed on the stone representation of the bar. All undercuts are blocked out being sure to have the block out material (i.e. Rubber Sep) cover 1/2 of the cylindrical portion of the riders. This will provide a space between resin and the rider to facilitate adjustment of retention and easy insertion and removal of the prosthesis.
Gold rider - polymerized into denture acrylic.
Hinging movement.
Fixation:
Bar - pattern cast as part of retainer castings.
Nylon rider - retained in processed denture acrylic socket, optional metal housing available
Optional metal housing available.
Optional adjustable gold alloy rider.
Three color coded riders for three retentive strengths from lightest to strongest: white, yellow, and red can be used with or without the Hader metal housing.
Mechanical snap retention.
Plastic bar pattern, nylon riders.