I am not sure what complications you are having?
I worked with a dentist who was doing implants and saw many positive experiences. After the tooth is removed (which is the worse part) they will do a xray to let you know if a nasal lift is necessary (this is due to age generally). If you need nasal lift, the doc will wait a few weeks until you recover. After this the doc will open up the gum line and insert liquid bone (the graft). If you are a smoker, this part of the procedure is tricky. Generally a GOOD doc will let people that smoke know that there is a high failer rate if you choose not to quit. The graft is done so that there is sufficient bone for the rod to be inserted. Bone growth will take 6-8 months or longer. The doc will have you come in to see if there is proper growth and may have to "shave" some bone to get a good socket fit. In the meantime a rod will be ordered and a tooth to fit the rod - this always take a few visits.
Pain tolerance is different with all people, but the ONLY complaints of pain that we used to receive is the extraction of the tooth and the nasal lift (more dizzyness than pain with that one). The rod insertion is an easy procedure for the doc and patient.
The only failures I saw were bone grafts not taking (generally due to patient age and smoking).
After a long period of waiting - generally 6-10 months total - all patients would have gone through this again.
An implant when done correctly is stronger and more durable than your other teeth.
I HIGHLY recommend this procedure if you have the money. Placing this tooth will also keep your other teeth aligned correctly in your mouth.
Good luck with your decision and keep a positive outlook. This procedure takes a bit of time and many visits, but if you have already had your tooth extracted or lost it, the most painful part is over with.
B.