system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Certain oral conditions may preclude the use of the rubber dam; these conditions include:
assistant
The correct answer is  Certain oral conditions may preclude the use of the​ rubber dam; these conditions include:

Teeth that have​ not erupted sufficiently to support a retainer.
Some​ third molars.
Extremely malpositioned teeth.

In​ addition, patients suffering from asthma may not tolerate the rubber dam if breathing through the nose is​ difficult.
Sturdevants operative dentistry 4th edition page 446