In case, if maxillary canine is missing and we have to make a tooth supported FPD, abutment will be:
**Core Concept**
The maxillary canine is a key tooth in the anterior maxillary segment, providing both functional and aesthetic support to the dentition. In cases where this tooth is missing, a tooth-supported Fixed Partial Denture (FPD) requires careful selection of an alternative abutment to ensure adequate retention, stability, and distribution of occlusal forces.
**Why the Correct Answer is Right**
The correct abutment for a maxillary canine in a tooth-supported FPD is usually the adjacent lateral incisor or the second premolar. This is because these teeth are positioned to withstand the occlusal forces and have sufficient root structure to support the FPD. The adjacent lateral incisor is often preferred due to its proximity to the missing canine and its ability to distribute forces more evenly.
* **Option A:** The option of using the central incisor as an abutment is incorrect because it may compromise the aesthetic outcome and may not be able to withstand the occlusal forces.
* **Option B:** The option of using the second molar as an abutment is incorrect because it may not have sufficient root structure to support the FPD and may compromise the posterior occlusion.
* **Option C:** The option of using the first premolar as an abutment is incorrect because it may not have sufficient root structure to support the FPD and may compromise the anterior occlusion.
**Clinical Pearl / High-Yield Fact**
When selecting an abutment for a tooth-supported FPD, it is essential to consider the distribution of occlusal forces, the root structure of the adjacent teeth, and the aesthetic outcome to ensure a successful and long-lasting restoration.
**Correct Answer: D. second premolar.