To correct crowding, we need to think about how to create the proper space in the arch. For opening space in mild or moderate crowding cases, we have three options: 

Anterior proclination:  

• Commonly used for correcting retroclined anterior teeth. 

• It is very important to bear in mind the bone support, the amount of proclination needed to correct the crowding, the gingival biotype and the periodontal health.