Is It Possible to Bond the Upper Part of Top Teeth That Have Been Exposed and Are Yellowed by Receding Gums?

Today's technology allows dentist to do amazing things for patients.   A competent cosmetic dentist should be able to provide you with several options to address your concerns and obtain results that look natural.  I would imagine their approach will also include an assessment why the gums may have receded to see what can be done to prevent further recession. 

Short answer: Yes, but it is not ideal. I usually recommend leaving it alone unless it is painful or you do not like how it looks. You need to see a dentist and figure out the cause of the recession, which may be a poor occlusion or grinding habit.