There are many things that contribute to implant failure and smoking is a big one. The nice thing about smoking is that you can stop (and you should for other health reasons, but you should know that). Diabetes, autoimmune diseases, and periodontitis lower the success rate also, but they can only be controlled and not stopped like smoking. It is fine to have the implants placed even if you are smoking because some of them can still be successful, but you need to know that they might not integrate into the bone and you need to understand that it is your fault and not the provider placing the implant. How successful is implant placement in a smoker? In the past we have only done the studies on healthy people so we know they are largely successful on them. Many smokers have had implants placed and they were a success. Does that mean go ahead and have it placed without worrying about the consequences of it failing? The biggest thing I would worry about is that if the implant fails, you may have a defect in the bone making it extremely more difficult to place an implant in that same spot.