Sunday, July 3rd 2022 8:51PM EDT

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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