I think you could help this young lady by avoiding a lifetime of bridges or implants by closing the space. The difficulty will be moving the upper posterior teeth forward. You will be somewhat helped by restoring the laterals as centrals so there will be less space and you may be able to create more overjet by aligning the lower arch and retracting the anteriors into the remaining first molar space. I use this strategy a great deal but generally in younger patients. I have not tried in adults (or young adults). I use an upper Nance arch with soldered hooks and place TADs to move the upper posterior forward. I have had good success but am not sure how the space will close in this case. PM me if you have questions. Good luck. And, obviously, restore the carious lesions before starting treatment. ■ christjl Member Since: 02/07/13 Post: 4 of 7 3/5/2018 Close all space. Right side already done and left will be aided with lower treatment. Upright LL6 and close some-if not all. Lower space will make left side a slam dunk. Make new crowns on 2's to make them look like 1's ... and done. Good luck.■ srensch Member Since: 03/12/09 Post: 5 of 7 3/5/2018 Thank you. I think movement all posterior segment anteriorly will take long time. Question for you, "srensch," do you mean new crown on lateral to appear as central and canine reshaping to lateral? ■ HJS Member Since: 01/07/06 Posts: 6 and 7 of 7 3/6/2018 How would you treat this case? Search: "Lost U1s" Orthotown's message boards are a great place to share your tips, ask questions or just learn what other Townies are doing. To see this entire conversation and weigh in, go to orthotown.com and under message boards, search "Lost U1s." This thread will be the top result. orthotown.com \\ JULY/AUGUST 2018 17http://www.orthotown.com/messageboard/thread.aspx?a=11&s=6&f=693&t=308027&g=1&st=Lost%20U1s http://www.orthotown.com