RCT abutment of FPD have higher risk for fracture.abutment which have RCT in cantilever FPD have higher susceptibility to fracture

statement true or false:

RCT abutment of FPD have higher risk for fracture.abutment which have RCT in cantilever FPD have higher susceptibility to fracture

• A- 1st is true,2nd is false
• B- 1st is false,2nd is true-
• C- both are false
• D- both are true

The correct answer is D- both are true.

Here's why:

- 1st statement:

RCT abutments of FPD do have a higher risk for fracture compared to vital abutments. This is because endodontic treatment weakens the tooth structure due to removal of dentin and placement of filling materials. Additionally, post-and-core restorations further compromise the remaining tooth structure.

- 2nd statement:

Abutments with RCT in cantilever FPDs indeed have a higher susceptibility to fracture. Cantilever FPDs place greater stress on the supporting abutment due to the unsupported extension of the bridge. When this stress is combined with a weakened RCT tooth, the risk of fracture significantly increases.

Several studies have supported these findings, highlighting the increased risk of fracture for RCT abutments, especially in cantilever designs. Therefore, both statements are true.

It's important to note that while RCT teeth can be viable abutments for FPDs with proper management, their increased susceptibility to fracture requires careful treatment planning and fabrication techniques to minimize the risk.