What are TiBases and why do labs use them?
TiBase is an intermediary connection found in between the titanium implant and ceramic crown. This connection point is also known as the implant-abutment junction. Its purpose is to connect the ceramic crown to the specific implant which it was fabricated for.
The implant/abutment junction should be a titanium connection. Tibases allow full ceramic crowns to have a titanium connection with the implant. Tibases are specific to the implant brand/connection type and are cemented into the ceramic crown by your dental lab. Labs prefer Tibase connections because they are easily scanned and are cost effective.
Tibases are essentially cheap, non-customizable abutments. Tibases are small and thin and can fracture or debond from the crown itself. They also provide limited crown thickness at the cementation point, which can cause crown fracture (shown below).
They also tend to have poor emergence profiles that can impinge on the tissue and lead to bone loss.
Replace your TiBase with a custom abutment.
A new term has evolved called “screwmentable” or “Screwment”. This is a combination of a cement retained and screw retained restoration. These restorations are composed of a custom abutment and ceramic crown which are cemented in the lab (outside of the mouth) and an access hole is created to convert it into a screw retained crown.
This method replaces a cheap tibase with a higher quality custom abutment.