Overdenture: Rubber O-Ring Maintenance
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Removing/Inserting Rubber O-Ring into Brevis Housing
1. Remove rubber o-rings with a scaling instrument or explorer.
2. Insert the explorer in between the o-ring and Brevis housing and loosen the o-ring from the housing.
3. Using cotton pliers, squeeze the o-ring into a figure eight and insert it into the housing.
4. Place the entire o-ring into the retentive groove within the Brevis housing.
5. If the o-ring is fully inserted, yet not secure in the retention lip of the housing, use an explorer to move the o-ring into place.
Keys to Success
- Each patient maintains and inserts his denture differently. The o-ring should be changed every 6 to 24 months depending upon its wear.
- The o-rings should not be soaked in a solution with high alcohol content. Some cleaning solutions may dry out the rubber o-rings and cause them to lose retention faster than normal.
- An inappropriately aligned housing will result in excessive wear of the rubber o-ring.
- If excessive wear of o-ring is noted, remove and re-align the housing in denture with a sufficiently flowable acrylic injected onto the housing and into the relieved denture.
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