In a single stage placement situation the dental implant is placed and at the same time the healing cap is also placed. This means that there is only one surgical procedure to finish the surgical part of the treatment.
In a 2 stage dental implant placement situation, the dental implant is placed and a cover screw is placed on top of it. The gum tissue is placed over it and the implant is not seen. After a few months the implant is exposed, and a healing cap is then placed on the implant. The advantage of the two stage treatment is that there is less chance of infection and implant failure. The disadvantage is that it takes longer for the treatment and involves two surgeries as opposed to one.
Immediate implant placement means that the dental implant is placed at the same time as the tooth that is being removed and replaced by this implant. The benefits are a shorter treatment plan and bone preservation. It cannot always be done due to different factors such as infection or the type of tooth and tooth position.
Immediate load means that the implant will get a crown or dentures placed at the same time as the implant placement. It is sometimes referred to as "teeth in a day". This can only be done in certain circumstances, and is not performed often.
Delayed implant placement means that the tooth is removed and a certain amount of time is allowed to pass before a dental implant is placed in the area. This is done very often and when it is anticipated that there will be enough bone to place the dental implant at a later date with or without grafting.
Delayed implant placement with delayed grafting means that the tooth is removed and a certain amount of time is allowed to pass before any grafting is done. The tooth is removed and some time is allowed to pass. Then grafting is done, with a waiting period afterwards. Finally, the dental implant is placed. The crown is placed after a final waiting period.