CEMENT MARGIN SWITCHING


Dear Colleague 

"Cementing margin switching" Have you ever heard this?
Implant restoration with cement retained should not be adjusted for implant abutment margin in a nutshell. Let us see below figures.

Final restoration was placed with under margin implant restoration in 2020.

The Case History and Discussion

Periapical radiograph in 2008. Tooth No. 36 and 37 cement-retained Zr implant  restoration was placed. See bone level around these.



After 12 years the graph in 2020 with mesial ceramic chipping and implant replacement of No.35.
The restoration margin fitting might not be perfect but bone loss was minimal.

Why?

Figure of flow of cement. Under cement margin may prevent  the cement flow to submucosal area under the abutment !? 

Prefer Under to Over. 

These are not teeth with dental caries.




When designing the cement-retained implant restoration,  always setting the abutment-margin with under-margined for preventing cement flow to around submucosal abutment area.

Insufficient under restoration margin on the Cerec PC.


Periapical radiograph in 2020 after restoration was cemented.

No.36's distal margin is under and insufficient but no flow of cement to under abutment area.


Prefer Under to Over. 

Prefer Shallow to Deep.

These are not teeth with dental caries.







コメント

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  2. Thank you for sharing this important information with us. Quite helpful content, I would like to add that in order for the Dental Implant process to be a success, there must be enough bone in the jawbone to support the implants can be anchored firmly. Dental Bone Grafting is a minor surgical procedure that is normally done in a dental office. An incision is made in your gum to gain access to the bone beneath it, and then grafting material is added. Most often, the grafting material is processed bone minerals around which your body will actually deposit new bone cells. Dental Maxillofacial Surgery in India

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