Final answer:
A patient with space between a third molar and a premolar with class 2 mobility should be evaluated for periodontal disease. Initial therapy may include scaling and root planing, followed by possible tooth splinting or surgical interventions. A bridge or implant may also be considered for restorative purposes if necessary.
Step-by-step explanation:
If a patient presents with a space between a third molar (3M) and a premolar with class 2 mobility, this might indicate a moderate level of tooth mobility that could be due to bone loss or periodontal disease. To fix this issue, initially, a comprehensive periodontal evaluation is necessary to determine the underlying cause of the mobility.
If periodontal disease is the cause, nonsurgical periodontal therapy such as scaling and root planing may be performed to remove plaque and calculus. Depending on the severity and response to initial therapy, additional procedures like splinting of the mobile tooth to adjacent stable teeth or periodontal surgery may be indicated. Restorative options such as a bridge or dental implant can also be considered if the tooth is deemed non-restorable or if the space resulting from a missing tooth needs to be filled.