Extraction of mandibular first molar in an 8 year old child is known as:

Wilkinson Extraction  Wilkinson advocated extraction of all the four first permanent molars between the age of 8 ½ & 9 years.  The basis of it is the fact that first molars are highly susceptible to caries.  The other benefits of extracting first molars at an early age are: To avoid third molar impactions by providing additional space for their eruption.   To reduce crowding in the arch.