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
Extrusive movements ideally would produce no areas of compression within PDL, but will produce:
assistant
The correct answer is  Extrusion is defined as the axial movement of the tooth along the long axis towards the coronal part. 
Features of Extrusion:

Force required: 35–60 g
Loading pattern: No areas of compression in PDL.

Only stretched areas/tension.