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What is The index described by Brooke and Shaw to assess orthodontic treatment need from an anatomical and aesthetic perspective is: and explain in detail?
INDEX OF ORTHODONTIC TREATMENT NEED (IOTN):
The Index of Orthodontic Treatment Needs (IOTN) was described in 1989 by R H. Brook and W.C. Shaw to assess orthodontic treatment need from an anatomical and aesthetic perspective.
Essentials of preventive and community dentistry 
Soben Peter 
5th edition