Final answer:
In preparing for the PTCE, pharmacy technicians should understand that teeth with advanced periodontal disease, high mobility, extensive caries, insufficient structure, fractures, or active infections are not suitable for treatment.
Step-by-step explanation:
The types of teeth or conditions that should not be chosen for treatment during the Pharmacy Technician Certification Exam (PTCE) include advanced periodontal disease, mobility greater than grade I, teeth with extensive caries, fractured teeth, teeth with insufficient structure for restoration, and teeth with active infections such as abscesses. These contraindications are important to understand when preparing for the PTCE as they relate to a pharmacy technician's understanding of medications and their impact on dental health.