What dental mobility class is defined by 1mm of horizontal movement?

Class I dental mobility is characterized by slight mobility, typically defined as 1mm of horizontal movement. This classification indicates that the tooth is somewhat loose but still has adequate support from the surrounding periodontal structures. Class I mobility is often seen in cases of early periodontal disease where the periodontal attachment is affected but not severely compromised.

In the context of assessing tooth mobility, understanding these classifications is crucial for dental professionals. Class I indicates a relatively stable situation in comparison to Class II, which involves greater than 1mm of horizontal movement and a loss of more periodontal support. Class III denotes significant mobility, indicating severe attachment loss and often a higher risk of tooth loss. Class IV would typically refer to a situation where the tooth is very mobile and may be in a state of impending loss.

Recognizing these classifications helps in determining the appropriate treatment and management strategies for patients with periodontal concerns. Hence, understanding that Class I defines up to 1mm of horizontal movement provides foundational knowledge for assessing periodontal health.