What is the best treatment option for a patient with class II mobility on the mandibular 3rd molar and space between the 3rd molar and premolar?

• A. FPD
• B. RPD
• C. implant prosthesis
• D. full denture

Answer: (C)

In the context of a patient with class II mobility on the mandibular third molar and space between the third molar and premolar, the most suitable treatment option is an implant prosthesis. This is primarily due to the instability associated with the class II mobility, indicating that the tooth is not in a healthy state and may require removal.

An implant prosthesis provides a fixed replacement option for the missing tooth, offering the advantage of preserving surrounding bone structure and maintaining alignment of adjacent teeth. The space between the third molar and the premolar suggests that the third molar may need to be extracted, and following extraction, an implant can be placed in this space effectively.

Other treatment options, such as a fixed partial denture (FPD), a removable partial denture (RPD), or a full denture, may not address the mobility issue or could complicate the situation further. RPDs and full dentures are generally more appropriate for patients with more extensive tooth loss or mobility across multiple teeth, while FPDs depend on adjacent healthy teeth for support, which may not be ideal if significant mobility is present in the third molar. Thus, an implant prosthesis is the best solution for maintaining oral function and aesthetics in this scenario.