Advantage
1. Wide scope of application
2. Eliminate less dental tissue
3. Patients can pick them by themselves
4. The production is simpler and the cost is relatively low
5. Easy to repair
Shortcoming
1. When wearing a foreign body, sometimes it will affect pronunciation and cause nausea
2. Poor stability and chewing effect, poor self -cleaning effect
3. It is possible to cause dental damage, mucosal ulcer, and alveolar bone absorption to speed up
4. It is possible to accelerate caries, periodontal disease, and temporal mandibular joint disease progress