Premolar extraction while having braces due to overcrowding? (Photos)

Two set points to be consider 1. Bottom first molar extracted 3 years ago. 2. Lateral incisor rotated due to small arch With given setpoints, my dentist decided to remove 3 premolar(2 from upper and 1 from bottom) my only problem with this is will the bottom really match with the upper teeth given that in the bottom teeth, 1st molar is the missing tooth(not the premolar)? I dont really know how can he fix this. Here is some pictures to enlighten the problem. Please help

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