If a patient presents with space between the 3rd molar and premolar, and exhibits Class II mobility, what should be the treatment approach?

In the scenario where a patient has a space between the third molar and the premolar and exhibits Class II mobility, the most appropriate treatment approach is to consider an implant. Class II mobility indicates that the tooth is significantly compromised and is unlikely to maintain its health or function in the long term.

The presence of space suggests that there may be associated periodontal issues or that the third molar is not completely integrated within the surrounding structures, contributing to its instability. Opting for an implant provides a means to replace the lost functionality of the tooth while offering a stable solution in the long run. Implants can mimic natural teeth closely, helping in maintaining adjacent teeth and overall oral health.

The other options do not adequately address the need for stability and restoration of function that a patient in this situation requires. Bone grafting may be relevant in cases where there is a need to rebuild alveolar bone, but the immediate concern of mobility makes an implant a more direct solution. Monitoring and re-evaluating may not address the urgent need to manage mobility or space. Lastly, extracting the third molar may not be favorable if the resulting situation would lead to further complications without a definitive plan for replacement with an implant.