Lower Incisor Extraction Followed by Braces Left Me with an Overjet. Can This Be Fixed?

For the upper and lower teeth to fit together in an ideal relationship, the number (size) of the upper teeth must be matched by the number (size) of the lower teeth. An orthodontist named Dr. Bolton described this relationship decades ago. If the upper teeth are relatively smaller in size or number than the lowers, there will be spaces between them, an underbite, or crowding in the lower. If the lower teeth are relatively smaller in size or number, an overbite, spaces in the lower, or crowding in the upper will exist. Fixing an overbite due to a missing lower incisor can be done by making the upper teeth slightly smaller (reshaping the teeth), making the lower teeth slightly wider (veneers or crowns), or by adding back the removed tooth (bridge or implant). Good luck!

I wonder if there was a plan in place to reduce the overjet when the decision was made to extract the lower incisor.  A single lower incisor extraction works best when there is a natural compensating REDUCED tooth width on the upper incisors, especially the laterals, or when there is an underbite "tendency" present.  Absent either both of these conditions, overjet will result from a lower incisor extraction.  To compensate for this you can wear elastic to CREATE a slight underbite tendency and reduce the width of the upper insisors slightly with "IPR".   Of course to accomplish this you'd need to get braces again.

I would think that this overjet problem could be corrected at least partially.  I wonder what your overjet was before you began treatment?  This can sometimes be a problem with extractions to gain space for orthodontic tooth movement.  To close the space the teeth must be retracted.  This can cause that problem. 

The teeth can probably be moved outward to reduce the overjet but know that if you do this you will probably open gaps between your lower incisors.  These gaps can then be closed with restorative dental procedures such as porcelain veneers or dental bonding.

As you noted in your question, you have overjet due to what we call a tooth size discrepancy (TSD) due to the fact that you have one less tooth on the lower. The only way to really address this would be to negate the TSD by either opening space on the lower to address the missing tooth (bridge or implant), or by reducing tooth structure on the top by (in this case I'm assuming since you are saying there is no crowdin) tooth reduction between teeth (IPR) to gently shaving away increments of enamel spread out between the upper teeth to equal the mass of the tooth you are missing on the lower, thus reducing your overjet. There are other factors involved in this decision obviously (ie angulation of your upper teeth, your facial esthetics, etc), but the aforementioned may serve as a couple of options.

Sometimes there is a compromise to achieve a better result.  We can't in all cases achieve an ideal result because it may take 2 or 3 times longer than the more practical route and the patient gets worn out.  Would you be willing to wear braces for 5 or more years.  You might be able to correct the overjet by reproximating some of the upper teeth and pulling them back.  But then your face may look sunken in and not as attractive.  You need to consider aesthetics primarily and then see if you can get a proper bite as well.  Sometimes you have to compromise