message board Posterior ... A thorough review-thanks to a great Townie-on how to make the call on 7s that may or may not erupt completely NickTi Member Since: 12/04/10 Post: 1 of 29 I've seen some discussions here regarding posterior crowding and lower 7s eruption, some great cases managing by Fen. I've had difficulty finding a good reference on indicators when anterior ramus remodeling is complete and thus when lower 7s are unlikely to erupt completely. Has anyone a guide to determine this? While I've seen many ortho cases fi nished with incomplete eruption of distal cusps, I can't seem to recall individuals in their 20s or after where this is still the case. When to extract lower 5s purely for the purposes of facilitating eruption of the 7s? Thanks! ■ 9/18/2019 justinudm Member Since: 09/29/14 Post: 2 of 29 Nick, great question. I have been wondering if there is any science to this as well. I certainly haven't found any. You would think with CBCT data and how long they have been on the market, there would be something? Maybe Fen knows of some evidence? Interested to see what comes out of this thread. ■ 9/18/2019 Fenrisúlfr Member Since: 02/25/09 Posts: 3 and 4 of 29 16 In general, if the subject is 13 or older, root formation of the 7s is more than 75% complete, and the tooth has not erupted, it is a likely indicator of posterior crowding. I'll post some examples and research. She was 13 years old at the start of treatment. Unfortunately, incisors are still a bit procumbent despite the extractions. NOVEMBER 2019 // orthotown.comhttp://www.orthotown.com