Dental The thixotropic theory claims that: A The principle fibres of the periodontal ligament has the major responsibility in supporting the tooth and transmitting forces to the bone B The periodontal ligament has the rheologic behaviour of a thixotropic gel. C The displacement of the tooth is largely controlled by fluid movements. D None of the above 💡 Explanation The thixotropic theory claims that: ✓ Correct Answer: B. The periodontal ligament has the rheologic behaviour of a thixotropic gel.