Orthodontic Assistant Practice Exam

What is a potential reason for mobility on an anterior tooth associated with loss of gingiva?

1. Genetic factors

2. Traumatic occlusion

3. Periodontal disease

4. Improper dental hygiene

The correct answer is: Traumatic occlusion

Mobility of an anterior tooth related to loss of gingiva can be attributed to periodontal disease. This condition leads to the destruction of the supporting structures of the teeth, including the gums and bone, resulting in increased tooth mobility. As the periodontal tissues become compromised, the anchoring system for the tooth weakens, making the tooth more susceptible to movement. Other factors such as traumatic occlusion may cause additional stress and strain on the tooth, but the direct association with loss of gingiva points more towards periodontal disease as the primary cause. Similarly, while genetic factors and improper dental hygiene can contribute to periodontal conditions, they do not directly correlate with the mobility observed due to the specific context of gingival loss. Therefore, acknowledging periodontal disease as a cause highlights the crucial connection between the health of the gums and the stability of teeth.